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Electrode placed in or on heart

Subclass of:

600 - Surgery

600300000 - DIAGNOSTIC TESTING

600372000 - Structure of body-contacting electrode or electrode inserted in body

600373000 - Electrode placed in body

Patent class list (only not empty are listed)

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Class / Patent application numberDescriptionNumber of patent applications / Date published
600375000 Anchored 12
Entries
DocumentTitleDate
20120203090SYSTEMS AND METHODS FOR TRACKING STROKE VOLUME USING HYBRID IMPEDANCE CONFIGURATIONS EMPLOYING A MULTI-POLE IMPLANTABLE CARDIAC LEAD - Techniques are provided for use with an implantable medical device for assessing stroke volume or related cardiac function parameters such as cardiac output based on impedance signals obtained using hybrid impedance configurations that exploit a multi-pole cardiac pacing/sensing lead implanted near the left ventricle. In one example, current is injected between a large and stable reference electrode and a ring electrode in the RV. The reference electrode may be, e.g., a coil electrode implanted within the superior vena cava (SVC). Impedance values are measured along a set of different sensing vectors between the reference electrode and each of the electrodes of the multi-pole LV lead. Stroke volume is then estimated and tracked within the patient using the impedance values. In this manner, a hybrid impedance detection configuration is exploited whereby one vector is used to inject current and other vectors are used to measure impedance.08-09-2012
20080234564Electrophysiology therapy catheter - A mapping catheter is positioned in a heart chamber, and active electrode sites are activated to impose an electric field within the chamber. The blood volume and wall motion modulates the electric field, which is detected by passive electrode sites on the preferred catheter. Electrophysiology measurements, as well as geometry measurements, are taken from the passive electrodes and used to display a map of intrinsic heart activity.09-25-2008
20130085360MAPPING CATHETER WITH SPIRAL ELECTRODE ASSEMBLY - A mapping catheter adapted for use in a heart chamber, has a distal mapping assembly with a spiral ribbon that is radially expandable and contractable by means of an expander so that electrodes on the ribbon can contact heart wall at a plurality of locations simultaneously. The expander extends the length of the catheter between a control handle and a distal end of the spiral ribbon. The expander can be controlled directly at its proximal end by a user or the expander can be responsive to a puller wire controlled by a user interface on the control handle.04-04-2013
20130041243USER INTERFACE DEVICES FOR ELECTROPHYSIOLOGY LAB DIAGNOSTIC AND THERAPEUTIC EQUIPMENT - In an electrophysiology (EP) lab, a bedside interface device allows an EP physician to directly control various diagnostic and therapeutic systems, including an electro-anatomic mapping system. The bedside interface device can include a computer with wireless communication capability as well as a touch-responsive display panel and voice recognition. The bedside interface device can also be a hand-graspable wireless remote control device that is configured to detect motions or gestures made with the remote control by the physician, allowing the physician to directly interact with the mapping system. The bedside interface device can also be a motion capture camera configured to determine motion patterns of the physician's arms, legs, trunk, face and the like, which are defined in advance to correspond to commands for the mapping system. The bedside interface device may also include voice recognition capabilities to allow a physician to directly issue verbal commands to the mapping system.02-14-2013
20100041973CATHETER RADIO FREQUENCY ADAPTER FOR WIRELESS COMMUNICATION - A catheter system for wireless communication with an electrophysiological (EP) mapping system. The catheter system comprises a catheter, a catheter adapter, and a radio frequency receiver module. The catheter includes a plurality of mapping electrodes including a tip electrode disposed on a distal portion of the elongated body, the mapping electrodes detecting electrocardiograph (ECG) signals; and a reference electrode being disposed on the elongated body at a distance from the plurality of mapping electrodes such that the reference electrode substantially does not detect electrocardiograph signals. The catheter includes a handle. The catheter adapter is attached to the handle. The catheter adapter includes an RF transmitter module for receiving, processing, and transmitting the detected ECG signals. The reference electrode provides a reference signal to the radio frequency (RF) transmitter module. The RF receiver module receives the transmitted ECG signals. The RF receiver module is coupled to the EP mapping system.02-18-2010
20130072774CARDIO MAPPING SYSTEM AND METHOD FOR CARDIO MAPPING - A method and system for determining the mechanism of cardiac arrhythmia in a patient is disclosed. The method basically entails measuring the impedance of cardiac tissue in a portion of the patient's heart using a catheter during an episode of supraventricular tachycardia to produce an iso-impedance map of that cardiac tissue on a video display and analyzing the pattern of the iso-impedance map to differentiate focal arrhythmia caused by a circumscribed region of focal firing and reentrant arrhythmia caused by a macroreentrant circuit. The method can also be used to identify regions of coherent rapidly conducting tissue e.g., Bachman's bundle or the inferoposterior pathway insertion points, to identify focal “mother rotors” throughout the left atrium that may participate in the generation and maintenance of atrial fibrillation and to identify areas of CAFE (complex atrial/fractionated electrograms) that truly reflect these mother rotors.03-21-2013
20130060118IMPLANTABLE MEDICAL DEVICE AND METHOD COMPRISING MEANS FOR DETECTING AND CLASSIFYING AN ARRHYTHMIA - An implantable medical device (03-07-2013
20130060117Method and Apparatus for Identifying Oversensing Using Far-Field Intracardiac Electrograms and Marker Channels - A method for identifying oversensing in implantable medical devices (IMDs), such as implantable cardioverter defibrillators (ICDs), is described. A near-field electrogram signal and a far-field electrogram signal are obtained via a near-field electrode pair and a far-field electrode pair. The near-field electrogram signal is compared to the far-field electrogram signal and a determination of whether oversensing exists is made based on the comparison. In some instances, a scheduled therapy is withheld in response to determining that oversensing exists.03-07-2013
20130060116Integrated System for Intravascular Placement of a Catheter - An integrated catheter placement system for accurately placing a catheter within a patient's vasculature is disclosed. In one embodiment, the integrated system comprises a system console, a tip location sensor for temporary placement on the patient's chest, and an ultrasound probe. The tip location sensor senses a magnetic field of a stylet disposed in a lumen of the catheter when the catheter is disposed in the vasculature. The ultrasound probe ultrasonically images a portion of the vasculature prior to intravascular introduction of the catheter. The ultrasound probe includes user input controls for controlling use of the ultrasound probe in an ultrasound mode and use of the tip location sensor in a tip location mode. In another embodiment, ECG signal-based catheter tip guidance is included in the integrated system to enable guidance of the catheter tip to a desired position with respect to a node of the patient's heart.03-07-2013
20130066181IMPLANTABLE HEMODYNAMIC MONITOR AND METHODS FOR USE THEREWITH - Provided herein are implantable systems that include an implantable photoplethysmography (PPG) sensor, which can be used to obtain an arterial PPG waveform. In an embodiment, a metric of a terminal portion of an arterial PPG waveform is determined, and a metric of an initial portion of the arterial PPG waveform is determined, and a surrogate of mean arterial pressure is determined based on the metric of the terminal portion and the metric of the initial portion. In another embodiment, a surrogate of diastolic pressure is determined based on a metric of a terminal portion of an arterial PPG waveform. In a further embodiment, a surrogate of cardiac afterload is determined based on a metric of a terminal portion of an arterial PPG waveform.03-14-2013
20120116200Fixed loop deflectable electrophysiology catheters having an extended braid primary shaft coupled to the periphery of the fixed loop and methods of manufacturing therefor - An EP catheter includes a tubular body having a proximal region, a neck region, and a distal portion predisposed into a single shallow helical fixed-diameter loop configuration and including a plurality of diagnostic electrodes. In deflectable catheter forms, at least one activation wire extends through at least a portion of the proximal region of the catheter body and is adapted to deflect the up to approximately 180 degrees relative to the proximal region. The catheter can be operated manually by a clinician or via a clinician-surrogate such as a computer processor-controlled surgical system. In addition, a variety of localization, visualization, and/or orientation-specific elements can be incorporated into the devices described, depicted, and claimed herein (e.g., metallic coil members, active impedance emitting or receiving electrodes, fluoroscopically opaque materials, and the like).05-10-2012
20120116199In-plane dual loop fixed diameter electrophysiology catheters and methods of manufacturing therefor - An EP catheter includes a tubular body having a proximal region, a neck region, and a distal portion predisposed into an in-plane dual loop (at least, approximately, more or less) configuration and including a plurality of diagnostic electrodes. In deflectable catheter forms, at least one activation wire extends through at least a portion of the proximal region of the catheter body and is adapted to deflect the distal portion up to approximately 180 degrees relative to the proximal region. The catheter can be operated manually by a clinician or via a clinician-surrogate such as a computer processor-controlled surgical system. In addition, a variety of localization, visualization, and/or orientation-specific elements can be incorporated into the devices described, depicted, and claimed herein (e.g., metallic coil members, active impedance emitting or receiving electrodes, fluoroscopically opaque materials, and the like).05-10-2012
20080294030Torque device for a sensor guide wire - The invention relates to a torque device for a sensor guide wire having a sensor provided at a distal portion and a male connector provided at the proximal end, which torque device comprises a grip body and a cap adapted to be joined to the grip body, and a number of chuck segments provided on the cap or the grip body, wherein the torque device is a one-way device defining an insertion direction for the sensor guide wire and wherein the chuck segments have free ends which are directed in the insertion direction.11-27-2008
20100198040Methods and apparatus for assessing and improving electrode contact with cardiac tissue - Embodiments of the invention relate to methods for assessing and/or improving contact between an electrophysiology catheter and tissue, and catheters for performing the methods. One embodiment relates to a catheter comprising a braided conductive member coupled to the distal end of a shaft, wherein the braided conductive member comprises a plurality of pressure sensitive wires. Another embodiment relates to a catheter comprising a braided conductive member having a plurality of sectors and coupled to the distal end of a shaft, and a balloon assembly constructed and arranged to selectively apply distal pressure to one or more sectors of the braided conductive member.08-05-2010
20110282176MULTI-DIRECTIONAL CATHETER CONTROL HANDLE - An apparatus for deflecting a distal portion of a catheter, a sheath, a medical device, or other flexible elongate member may generally include a handle portion, a pair of adjusting knobs, and deflection wires. The adjusting knobs may be rotatably coupled to the handle portion and operably coupled to the deflection wires. The deflection wires may be in further communication with the distal portion of the flexible elongate member. Rotation of the adjustment knobs may translate or otherwise displace particular deflection wires with respect to the rest of the flexible elongate member, thereby causing the distal portion of the flexible elongate member to deflect. Further, the deflection wires may be oriented such that the distal portion of the flexible elongate member may be deflected in a multitude of directions.11-17-2011
20110288392Kit for Non-Invasive Electrophysiology Procedures and Method of its Use - An electrophysiology catheter for use with a steerable introducer sheath includes a flexible catheter body having a proximal end and a distal end and at least one hollow elongate tip electrode disposed at the distal end of the catheter body. The hollow elongate tip electrode includes a sidewall having at least one elongate gap that provides flexibility allowing the tip electrode to bend relative to a longitudinal axis of the catheter body. The catheter body is an independent, non-steerable structure, and can be moved via movement of the steerable introducer through which it is introduced into a patient.11-24-2011
20110295098Catherter with Contractable Mapping Assembly - The invention is directed to a mapping catheter useful for mapping tubular regions in and around the heart. The catheter comprises an elongated tubular catheter body. A mapping assembly is provided at the distal end of the catheter body. The mapping assembly comprises a tubular structure comprising a pre-formed generally circular main region generally transverse and distal to the catheter body and having an outer circumference. The tubular structure comprises a non-conductive cover over at least the main region of the mapping assembly. A plurality of electrodes are carried by the generally circular main region of the mapping assembly. A control handle is mounted at the proximal end of the catheter body. A contraction wire extends through the catheter body and non-conductive cover of the mapping assembly for contracting the generally circular main region of the mapping assembly. The contraction wire has a distal end anchored in the non-conductive cover and a proximal end anchored to a mechanism in the control handle that facilitates longitudinal movement of the contraction wire relative to the catheter body. The portion of the contraction wire extending through the non-conductive cover is positioned on the side of the generally circular main region closer to the center of the generally circular region.12-01-2011
20100249568MEDICAL DEVICES HAVING AN ATRAUMATIC DISTAL TIP SEGMENT - A kit for the diagnosis or treatment of tissue in a body cavity includes an introducer and a catheter insertable through the lumen of the introducer having a proximal segment, a working segment and a flexible distal tip segment. The flexible distal tip segment is located adjacent the distal end of the working segment and includes a proximal end, a distal end and a pre-formed bend or curve that permits the catheter to exit the introducer in a lateral direction relative to the introducer body to prevent inadvertent damage to the tissue during a medical procedure. All or part of the working segment and the flexible distal tip segment may be adhesive-filled. The catheter may also include a plurality of sensing and/or energy delivery elements on the working segment and a shape-memory wire terminating at the distal end of the working segment. Methods of use and methods of manufacturing are also described.09-30-2010
20110118582Magnetically Guided Catheter With Flexible Tip - A catheter includes a flexible tubing having a proximal end and a distal end. The catheter also includes an electrode assembly attached to the distal end of the flexible tubing and including a first magnet therein. The electrode assembly including an electrically conductive tip electrode and an electrically nonconductive coupler which is connected between the tip electrode and the distal end of the flexible tubing. The electrically conductive tip electrode comprises a hollow elongated tip electrode including a sidewall provided with one or more elongated gaps extending through the sidewall. The one or more elongated gaps providing flexibility in the sidewall for bending movement of the tip electrode relative to a longitudinal axis of the catheter body. The first magnet is responsive to an external magnetic field to selectively position and guide the electrode assembly within a body of a patient.05-19-2011
20120143029Systems and methods for guiding a medical instrument - A guidance system for assisting with the insertion of a needle into a patient body is disclosed. The guidance system utilizes ultrasound imaging or other suitable imaging technology. In one embodiment, the guidance system comprises an imaging device including a probe for producing an image of an internal body portion target, such as a vessel. One or more sensors are included with the probe. The sensors sense a detectable characteristic related to the needle, such as a magnetic field of a magnet included with the needle. The system includes a processor that uses data relating to the sensed characteristic to determine a 3-D position of the needle. The system includes a display for depicting the position of the needle. In other embodiments, a guidance system for guiding rigid or other medical instruments is disclosed, together with various example implementations thereof.06-07-2012
20120130220GUIDEWIRE AND SIGNAL ANALYZER FOR PACING SITE OPTIMIZATION - Cardiac lead implantation systems, devices, and methods for lead implantation are disclosed. An illustrative cardiac lead implantation system comprises a mapping guidewire including one or more electrodes configured for sensing cardiac electrical activity, a signal analyzer including an analysis module configured for analyzing an electrocardiogram signal sensed by the mapping guidewire, and a user interface configured for monitoring one or more hemodynamic parameters within the body. The sensed electrical activity signal can be used by the analysis module to compute a timing interval associated with ventricular depolarization.05-24-2012
20090177071Non-Contact Cardiac Mapping, Including Preprocessing - A non-contact cardiac mapping method is disclosed that includes: (i) inserting a catheter into a heart cavity having an endocardium surface, the catheter including multiple, spatially distributed electrodes; (ii) measuring signals at the catheter electrodes in response to electrical activity in the heart cavity with the catheter spaced from the endocardium surface; and (iii) determining physiological information at multiple locations of the endocardium surface based on the measured signals and positions of the electrodes with respect to the endocardium surface. Related systems and computer programs are also disclosed.07-09-2009
20080312521SYSTEM AND METHOD FOR DETERMINING ELECTRODE-TISSUE CONTACT USING PHASE DIFFERENCE - Methods and systems for monitoring contact between a medical probe and tissue are provided. A medical probe is introduced into a patient adjacent the tissue. A time varying signal is transmitted to or from the second electrode, the time varying signal is sensed at the first tip electrode, a phase difference between the transmitted signal and the sensed signal is determined, and contact between the first tip electrode and the tissue is detected based on the determined phase difference.12-18-2008
20130217992Electrode Device, in Particular for Cardiovascular Application - An electrode device, in particular for cardiovascular applications, includes an elongated electrode body made from an insulating material, a plurality of electrodes for detecting electrocardiological signals and/or for outputting electrocardiological stimulus signals, and supply line, in particular non-elastic cables or strands, which serve for electrically connecting the electrodes, which supply lines are guided in each case in the electrode body, preferably in associated lumina. Furthermore, a compensating hose section is provided which is inserted in a parting point in the electrode and has a maximum outer diameter that corresponds to the electrode body, wherein helically shaped receptacles, for each supply line, are incorporated in the compensating hose section, and the compensating hose section, at its joining sides facing toward the electrode body, is connected in a hermetically sealed manner to the electrode body.08-22-2013
20100137700CATHETERS AND ELECTROPHYSIOLOGICAL DEVICES - The present invention provides systems and methods of use for catheters and electrophysiological devices. In particular, the present invention provides coronary catheters within which an extendable electrode array is housed.06-03-2010
20120197100Guided Ablation Devices, Systems, And Methods - An embodiment of the invention includes a system for the guidance of a catheter to different regions of tissue (e.g., cardiac tissue) for therapy (e.g., ablation therapy). A plurality of electrodes, such as an array of electrodes, may be configured to perform various tasks. First, some electrodes may measure cardiac polarization. Second, some electrodes may function as magnets (e.g., electromagnets) that guide a separate ablation catheter towards the electromagnetic electrodes. These electromagnetic electrodes may be positioned adjacent tissue that is now recognized (possibly due to the electrodes that measure cardiac polarization) as being in need of ablation therapy. Thus, the electromagnetic electrodes may cooperate with an ablation catheter to render a system with magnetic guidance capabilities using intracardiac magnetic field generation. The system may control electromagnetic forces from the array of electrodes to guide the ablation catheter tip to the desired therapy location. Other embodiments are described herein.08-02-2012
20090177072Non-Contact Cardiac Mapping, Including Moving Catheter and Multi-Beat Integration - A non-contact cardiac mapping method is disclosed that includes: (i) inserting a catheter into a heart cavity having an endocardium surface, the catheter including multiple, spatially distributed electrodes; (ii) measuring signals at the catheter electrodes in response to electrical activity in the heart cavity with the catheter spaced from the endocardium surface; and (iii) determining physiological information at multiple locations of the endocardium surface based on the measured signals and positions of the electrodes with respect to the endocardium surface. Related systems and computer programs are also disclosed.07-09-2009
20110224526SYSTEM AND METHOD FOR RECONSTRUCTING AND VIEWING CARDIAC ELECTRICAL ACTIVATION - System and method for the reconstruction of cardiac electrical activation from cardiac electrical signals recorded by intracardiac catheters. The obtained signals are processed using a Support Vector Machine (SVM) algorithm to solve the dual signal problem. Visualization of the solution includes geometric information in such a way that the cardiac electrical activity can be identified and localized. The system and method are described as a preferential application for anti-arrhythmic therapies.09-15-2011
20080262337Method and Apparatus for Mapping and/or Ablation of Cardiac Tissue - An apparatus for mapping and/or ablating tissue includes a braided conductive member that may be inverted to provide a ring-shaped surface. When a distal tip of the braided conductive member is retracted within the braided conductive member, the lack of protrusion allows the ring-shaped surface to contact a tissue wall such as a cardiac wall. In an undeployed configuration, the braided conductive member is longitudinally extended, and in a deployed configuration, the distal end of the braided conductive member is retracted to invert the braided conductive member.10-23-2008
20120078077CARDIAC MAPPING CATHETER - A multi electrode catheter for non contact mapping of the heart having independent articulation and deployment features.03-29-2012
20090253976Intracardiac Tracking System - In general, in one aspect, a method is disclosed for determining information about a position of an object. The method includes: (i) causing current to flow between each of three or more sets of current-injecting electrodes on a first catheter inserted into an organ in a patient's body, the organ having a periphery (ii) in response to current flow caused by each set of current injecting electrodes, measuring an electrical signal at each of one or more measuring electrodes located on one or more additional catheters inserted into the organ in the patient's body and (iii) determining the position of each of one or more of the measuring electrodes on the additional catheters relative to the first catheter based on the measured signals from the one or more measuring electrodes.10-08-2009
20090259119CATHETER HAVING MAPPING ASSEMBLY - A mapping catheter comprises a catheter body and a mapping assembly. The catheter body has an outer wall, proximal and distal ends, and at least one lumen extending therethrough. The mapping assembly comprises a generally straight proximal region attached to the catheter body, a generally circular main region distal the proximal region having an outer circumference, and a generally straight distal region distal the main region. The mapping assembly also comprises a support member having shape-memory, a non-conductive covering over the support member, and a plurality of electrodes on the non-conductive covering along the generally circular main region.10-15-2009
20100261989CATHETER - A catheter includes an outer jacket, a shaft member, a transition member and a core member. The outer jacket has a first interior passage at a proximal end and a second interior passage at a distal end. The shaft member is arranged within the outer jacket. The transition member is fixedly secured to the shaft member and includes a window. The core member is fixedly secured to the transition member. The window in the transition member allows communication between the first interior passage and the second interior passage.10-14-2010
20130123597Method of Locating the Tip of a Central Venous Catheter - Methods of locating a tip of a central venous catheter (“CVC”) relative to the superior vena cava, sino-atrial node, right atrium, and/or right ventricle using electrocardiogram data. The CVC includes at least one electrode. In particular embodiments, the CVC includes two or three pairs of electrodes. Further, depending upon the embodiment implemented, one or more electrodes may be attached to the patient's skin. The voltage across the electrodes is used to generate a P wave. A reference deflection value is determined for the P wave detected when the tip is within the proximal superior vena cava. Then, the tip is advanced and a new deflection value determined. A ratio of the new and reference deflection values is used to determine a tip location. The ratio may be used to instruct a user to advance or withdraw the tip.05-16-2013
20100168549ELECTROPHYSIOLOGY CATHETER AND SYSTEM FOR GENTLE AND FIRM WALL CONTACT - A method of applying an electrode on the end of a flexible medical device to the surface of a body structure, the method including navigating the distal end of the device to the surface by orienting the distal end and advancing the device until the tip of the device contacts the surface and the portion of the device proximal to the end prolapses. Alternatively the pressure can be monitored with a pressure sensor, and used as an input in a feed back control to maintain contact pressure within a pre-determined range.07-01-2010
20100168548Dual-Purpose Lasso Catheter with Irrigation - Cardiac catheters, including a lasso catheter, are provided for use in a system for electrical mapping of the heart has an array of raised, perforated electrodes, which are in fluid communication with an irrigating lumen. There are position sensors on a distal loop section and on a proximal base section of the catheter. The electrodes are sensing electrodes that may be adapted for pacing or ablation. The raised electrodes securely contact cardiac tissue, forming electrical connections having little resistance.07-01-2010
20100036227APPARATUS AND DISPLAY METHODS RELATING TO INTRAVASCULAR PLACEMENT OF A CATHETER - An integrated catheter placement system for accurately placing a catheter within a patient's vasculature is disclosed. In one embodiment, the integrated system comprises a system console, a tip location sensor for temporary placement on the patient's chest, and an ultrasound probe. The tip location sensor senses a magnetic field of a stylet disposed in a lumen of the catheter when the catheter is disposed in the vasculature. The ultrasound probe ultrasonically images a portion of the vasculature prior to introduction of the catheter. ECG signal-based catheter tip guidance is included in the integrated system to enable guidance of the catheter tip to a desired position with respect to a node of the patient's heart. Various aspects for visualizing and manipulating display of the ECG signal data acquired via the present system, together with aspects of various ECG sensor configurations, are also disclosed.02-11-2010
20090043186Miniature circular mapping catheter - An ablation device, including a catheter and an ablation element incorporating one or more balloons at the distal end of the catheter, has a continuous passageway extending through it from the proximal end of the catheter to the distal side of the expandable ablation element. The ablation device ablates tissue by subjecting it to ultrasound energy, cryogenic energy, chemical, laser beam, microwave, or radiation energy. A probe carrying electrodes is introduced through this passageway and deploys, under the influence of its own resilience, to a structure incorporating a loop which is automatically aligned with the axis of the expandable ablation device, so that minimal manipulation is required to place the probe. Pulmonary vein potential is monitored in real time via the electrodes. The probe may have an atraumatic tip with a ball formed at the leading edge. The atraumatic tip prevents any tissue damage such as perforation of heart wall.02-12-2009
20100069734CATHETER WITH FLEXIBLE PRE-SHAPED TIP SECTION - A catheter for mapping and/or ablating continuous linear or circumferential lesions at the intersection of a generally flat structure, such as the left atrium, and the ostium of generally cavernous regions of the heart, including pulmonary vein and the pulmonary venous antrum, comprises a catheter body with an intermediate section that is connected to a tip assembly by a highly flexible section. The intermediate section has at its distal end a preformed section, e.g., a curve, the intermediate section being deflectable in a direction opposite to the curve. The highly flexible section presets the tip assembly at an off-axis and/or off-plane angles from the preformed section. Accordingly, the preformed section is adapted to sit in the region and the preset angles of the ablation assembly enable contact with surrounding tissue. A high bending modulus enables the flexible section absorb displacement force applied to the ablation assembly, such as when the tip assembly encounters uneven tissue surface, without displacing the curve from the region. The tip assembly can be irrigated as enabled by a plurality of irrigation ports, a coil electrode, and a porous covering to disperse fluid over the outer surface of the tip assembly.03-18-2010
20100069733ELECTROPHYSIOLOGY CATHETER WITH ELECTRODE LOOP - A magnetically guidable electrophysiology catheter has an elongate catheter body having a proximal end and a distal end. At least one magnetically responsive element is disposed adjacent the distal end for aligning the distal end relative to an externally applied magnetic field. The portion of the catheter adjacent the distal end is formed in a generally planar loop, adjacent the distal end, with the distal end of the catheter projecting from the center of the loop, generally perpendicularly to the plane of the loop. A plurality of electrodes are disposed on the loop for measuring electrical activity in the tissue with which the loop is in contact.03-18-2010
20110077498CATHETER WITH BIASED PLANAR DEFLECTION - An improved steerable catheter with biased, in-plane bi-directional deflection has an elongated catheter body, a deflectable intermediate section having a tubing with at least a first and a second off-axis opposing lumens for puller wires that define a plane of deflection, and a control handle at a proximal end of the catheter body. The deflectable intermediate section includes at least two elongated bias members that extend along the length and lie on a plane perpendicular to the plane of deflection so as to resist flexure outside of the plane of deflection. In a more detailed embodiment, the deflectable intermediate section has an integrated tubular construction that includes an inner layer, a braided mesh surrounding the inner layer and an outer layer, where the bias members can be situated between the inner layer and the braided mesh, or between the braided mesh and the outer layer.03-31-2011
20110152660METHODS AND APPARATUS FOR AUTOMATICALLY TRACKING HEART FAILURE STATUS - Assessing symptomatic and asymptomatic physiologic changes due to chronic heart failure involves apparatus and methods for gauging degradation and possible improvement using automated measurement of inter-ventricular conduction time, both alone and in combination with other automated physiologic tests. Conduction times increase due to the greater distance a wavefront must traverse as a heart enlarges. Analysis of conduction time can be used to verify the occurrence of cardiac remodeling due to heart failure as well as beneficial reverse remodeling due to successful heart failure therapy delivery. Patient activity level(s) and presence/increase in pulmonary fluids can also be used to automatically determine changes in heart failure status and/or predict hospitalization. Conduction time is monitored between electrodes positioned in the left and right ventricles of the heart via endocardial or epicardial electrodes.06-23-2011
20110054287CATHETER WITH MULTI-FUNCTIONAL CONTROL HANDLE HAVING ROTATIONAL MECHANISM - A catheter for use in a patient's heart, especially for mapping a tubular region of the heart, has a catheter body, a deflectable intermediate section and a distal mapping assembly that has a generally circular portion adapted to sit on or in a tubular region of the heart. A control handle of the catheter allows for single-handed manipulation of various control mechanisms that can deflect the intermediate section and contract the mapping assembly by means of a deflection control assembly and a rotational control assembly. The deflection control assembly has a deflection arm and a rocker member. The rotational control assembly has an outer rotational member, an inner rotational member and a cam. A pair of puller members are responsive to the deflection control assembly to bi-directionally deflect the intermediate section. A third puller member is responsive to the rotational control assembly to contract the generally circular portion of the mapping assembly.03-03-2011
20100305423CATHETER HAVING DISTAL SEALING MEMBER - A catheter includes a proximal end, a distal end, a tubular member, and an inner member extending through the tubular member. The inner member is movable axially relative to the tubular member. The catheter also includes a seal member including a first portion and a second portion. The seal member extends between the tubular member and the inner member. The first portion of the seal member remains stationary relative to the tubular member, and the second portion of the seal member remains stationary relative to the inner member during relative axial movement between the tubular member and the inner member.12-02-2010
20100261990CATHETER ASSEMBLY AND ASSOCIATED METHOD - A catheter assembly for use in an anatomy can include an elongated body, which can have a proximal end and a distal end. The body can also define a lumen from the proximal end to the distal end. The assembly can include at least one electrode, which can be coupled to the distal end to sense an electrical activity within the anatomy. The assembly can include a core wire, which can be received within the lumen from the proximal end to the distal end. The core wire can be configured to move the distal end from a first configuration to a second configuration. The assembly can also include a necked portion, which can be formed between the proximal end and the distal end to provide increased stiffness to the distal end of the body.10-14-2010
20100030055DEVICES, SYSTEMS, AND METHODS TO EVALUATE CARDIOVASCULAR FUNCTION - Devices and methods are disclosed which relate to the detection of cardiovascular efficiency and risk of disease. The rate of volumetric change of the heart can be determined by measuring the parallel conductance across electrodes attached to the heart. Measurements from a lumen would consider the total conductance. The rate of volumetric or lumen cross-section area change can then be compared to an average model to determine the health of a patient.02-04-2010
20110218415SYSTEM AND METHOD FOR DETECTING CARDIAC ARRHYTHMIAS FROM HEART NERVE ACTIVITY - A method has been developed that detects cardiac arrhythmia from intrinsic cardiac nerve signals obtained from a heart in a patient. The method includes sampling intrinsic cardiac nerve activity at a high sample rate, filtering the sampled signal with a high pass filter, comparing the filtered signal to a predetermined threshold, and initiating a therapeutic action in response to the filtered signal exceeding the predetermined threshold. The intrinsic cardiac nerve activity may be received through an electrode implanted on the heart or from an electrode inserted into the venous structure of the heart.09-08-2011
20110060207CATHETER WITH CONTRACTABLE MAPPING ASSEMBLY - The invention is directed to a mapping catheter useful for mapping tubular regions in and around the heart. The catheter comprises an elongated tubular catheter body. A mapping assembly is provided at the distal end of the catheter body. The mapping assembly comprises a tubular structure comprising a pre-formed generally circular main region generally transverse and distal to the catheter body and having an outer circumference. The tubular structure comprises a non-conductive cover over at least the main region of the mapping assembly. A plurality of electrodes are carried by the generally circular main region of the mapping assembly. A control handle is mounted at the proximal end of the catheter body. A contraction wire extends through the catheter body and non-conductive cover of the mapping assembly for contracting the generally circular main region of the mapping assembly. The contraction wire has a distal end anchored in the non-conductive cover and a proximal end anchored to a mechanism in the control handle that facilitates longitudinal movement of the contraction wire relative to the catheter body. The portion of the contraction wire extending through the non-conductive cover is positioned on the side of the generally circular main region closer to the center of the generally circular region.03-10-2011
20120310066METHOD AND APPARATUS FOR CREATING A HIGH RESOLUTION MAP OF THE ELECTRICAL AND MECHANICAL PROPERTIES OF THE HEART - A system method that tracks one or more points on the surface of a cardiac tissue throughout a cardiac cycle and collect various types of data points which are then subsequently used to generate a corresponding model of the tissue and display the model as a 3D color coded image is described. In one embodiment, the system determines the position and orientation of a distal tip of a catheter, manipulates the catheter tip so as to maintain constant contact between the tip and a region of cardiac tissue using the impedance method, acquires positional and electrical data of the tip-tissue configuration through an entire heartbeat cycle, repeats the measurements as many times as needed in different tissue regions, and forms a 3D color coded map displaying various mechanical and electrical properties of the heart using the acquired data.12-06-2012
20120310065ELECTROPHYSIOLOGY CATHETER FOR MAPPING AND/OR ABLATION - The present invention encompasses apparatus and methods for mapping electrical activity within the heart. The present invention also encompasses methods and apparatus for creating lesions in the heart tissue (ablating) to create a region of necrotic tissue which serves to disable the propagation of errant electrical impulses caused by an arrhythmia.12-06-2012
20120157811IMPLANTABLE DEVICE - Temporarily or permanently implantable medical device, having at least one longitudinally extended first electrical conductor having a functional lead, which is connected to a functional electrode pole for dispensing therapeutic signals or for detecting diagnostic signals, and including at least one second electrical conductor, which is coupled to the functional lead and is guided with it in a shared insulating sheathing, such that a coupling between the functional lead and the second electrical conductor is designed to input electromagnetic radiofrequency waves guided in the functional lead at least partially into the second electrical conductor.06-21-2012
20120157810IMPLANTABLE DEVICE - A temporarily or permanently implantable medical device having at least one elongated electrical function conductor for transmitting therapeutic signals or diagnostic signals or both. At least one additional conductor is provided which together with the function conductor forms, at least in places, a double line which is separated from the function conductor by a dielectric and which is coupled to the function conductor via a coupling impedance. The coupling impedance is dimensioned so that the value of the line wave impedance of the function conductor for frequency ranges far above a frequency range of the therapeutic or diagnostic signals is much greater than the in the frequency range of the therapeutic or diagnostic signals, so that currents in a frequency range above the frequency range of the therapeutic or diagnostic signals are damped more intensely than the currents which form therapeutic or diagnostic signals.06-21-2012
20120157814IMPLANTABLE DEVICE - An implantable medical device, which is connected or is to be connected to at least two elongated electric function conductors for the transmission of treatment signals or diagnostic signals or both, and at least one electrode pole connected to at least one of the function conductors, via which electrode pole electric current can be delivered in the case of use to surrounding tissue of the body or with which electric potentials can be sensed in the surrounding tissue or both. Includes a wave transfer module connected to the function conductor and which is embodied to transform waves arriving via a function conductor and to switch them as transformed waves onto another function conductor or the same function conductor in such a controlled manner that the waves are destructively superimposed at the electrode pole.06-21-2012
20120157813IMPLANTABLE DEVICE - An implantable medical device having at least one elongated electrical function conductor that transmits therapeutic signals or diagnostic signals or both, and an electrode pole connected to the function conductor to deliver electrical current or field or sense electrical potentials in surrounding tissue during use, or both. Includes a sensing device which is connected to a field-generating electrode pole and potential-sensing electrode pole, and a reference pole, and which is designed to detect generated electrical potentials via the potential-sensing electrode pole in relation to the reference pole, and to generate an output signal which represents a detected electrical potential. Also has a control device connected to the sensing device to evaluate an output signal generated by the sensing device, and to control the medical device as a function of the potential detected by the sensing device.06-21-2012
20120157809IMPLANTABLE DEVICE - An implantable medical device having at least one first and one second longitudinally extended electrical functional conductor for transmitting therapeutic signals or diagnostic signals or both and one electrode pole connected to the functional conductor, the electrical current being delivered to the surrounded bodily tissue in the use case by means of this electrode pole or with which electrical potentials can be sensed in the surrounding tissue in the use case or both, such that the two electrical functional conductors are inductively coupled for defined resonant frequencies such that RF energy of a first functional conductor is diverted to the second functional conductor and the energy is delivered to the surrounding tissue in the use case via this functional conductor and via an electrode pole connected to this functional conductor.06-21-2012
20110092789MINIATURE CIRCULAR MAPPING CATHETER - A cardiac ablation device, including a catheter and an expandable ablation element incorporating one or more balloons at the distal end of the catheter, has a continuous passageway extending through it from the proximal end of the catheter to the distal side of the expandable ablation element. A probe carrying electrodes is introduced through this passageway and deploys, under the influence of its own resilience, to a structure incorporating a loop which is automatically aligned with the axis of the expandable ablation device, so that minimal manipulation is required to place the probe. The probe may have an atraumatic tip with a ball formed at the leading edge. The atraumatic tip prevents any tissue damage such as perforation of heart wall.04-21-2011
20120157812IMPLANTABLE DEVICE - Implantable medical device with at least one long extended electrical conductor that is insulated from the surrounding material by a dielectric having an inside diameter d06-21-2012
20130012800Introducer for a Minimally Invasive Physiologic Parameter Recorder - An implantable monitoring device includes a flexible lead body that includes at least one sensing element. The device also includes a rigid main body connected to the flexible lead body at an attachment point. The rigid main body is generally centered about a longitudinal axis defined by the flexible lead body when the lead body is unflexed. The device further includes a measurement circuit, which is housed within the rigid main body and electrically coupled to the at least one sensing element of the flexible lead body and at least another sensing element on an outside surface of the rigid main body. The measurement circuit is configured to measure a potential difference between the at least one sensing element of the flexible lead body and the at least another sensing element of the main body.01-10-2013
20120165643MOTION-BASED OPTIMIZATION FOR PLACEMENT OF CARDIAC STIMULATION ELECTRODES - An exemplary method includes use of a multielectrode device that can help position a cardiac stimulation lead to an optimal site in the heart based at least in part on cardiac motion information acquired via the multielectrode device and one or more pairs of current delivery electrodes that establish potential fields (e.g., for use as a coordinate system). An exemplary mutlielectrode device may be a multielectrode catheter or a multifilar, electrode-bearing guidewire. Various other exemplary methods, devices, systems, etc., are also disclosed.06-28-2012
20120220849Minimally Invasive Physiologic Parameter Recorder and Introducer System - An implantable monitoring device includes a flexible lead body that includes at least one sensing element. The device also includes a rigid main body connected to the flexible lead body at an attachment point. The rigid main body is generally centered about a longitudinal axis defined by the flexible lead body when the lead body is unflexed. The device further includes a measurement circuit, which is housed within the rigid main body and electrically coupled to the at least one sensing element of the flexible lead body and at least another sensing element on an outside surface of the rigid main body. The measurement circuit is configured to measure a potential difference between the at least one sensing element of the flexible lead body and the at least another sensing element of the main body.08-30-2012
20120215089PHYSICIAN'S PROGRAMMER WITH ST-SEGMENT HISTOGRAM DISPLAY CAPABILITY - A physician's programmer for an implantable device is disclosed. The programmer includes a receiver for receiving wireless transmission data from the implantable heart monitor. A processor is configured to extract from the wireless transmission data ST-deviation histogram data as a function of heart rate. The histogram data for a particular heart rate range is shown on a display in the form of a bar chart. The histogram data for a plurality of heart rate ranges is shown in the form of a chart with multiple line plots.08-23-2012
20120172697CATHETER WITH SHEET ARRAY OF ELECTRODES - A medical device has a flexible elongated body, a handle connected to the elongated body, at least one spine connected to the elongated body, and a flexible sheet attached to the at least one spine. The flexible sheet has a plurality of electrodes thereon, wherein the flexible sheet and the plurality of electrodes define a mapping assembly for mapping electrical information in tissue, and wherein the at least one spine and the flexible sheet is movable from a collapsed configuration to a deployed configuration.07-05-2012
20120316416Fault Tolerant Methods and Architectures for Embedded Intelligence in Medical Leads - The present disclosure pertains to methods, devices and systems for detection of a lead-related condition in a medical electrical lead. In accordance with the disclosure, a physiological waveform interpreter module embedded within the lead functions to sense the occurrence of a cardiac event and to generate a minimal impact signal. In an example implementation, the physiological waveform interpreter module is disposed proximate to the sensing site or vicinity of cardiac signals. The physiological waveform interpreter module transmits the minimal impact signal that may include one or more predetermined properties to a remotely located lead monitoring module upon sensing a cardiac event. The lead monitoring module receives and processes the minimal impact signal to determine whether a cardiac depolarization has occurred and simultaneously verify the integrity of the transmission medium.12-13-2012
20120259194CATHETER HAVING A FORCE SENSING DISTAL TIP - A catheter for contact force sensing includes a catheter body, a deflectable section, and a distal section having a tip electrode and a contact force sensor for sensing a 3D contact force vector applied to the tip electrode. The contact force sensor has a body and at least one sensor with an electrical characteristic responsive to deformation of the body resulting from the force vector. The sensor receives an electrical current and outputs an electrical signal indicative of a change in the electrical characteristic. The sensor may be a strain gage responsive to tension and compression of at least a portion of the body of the force sensor, and the electrical characteristic may be electrical resistivity of the strain gage. Alternatively, the sensor may be responsive to strain and stress of at least a portion of the body, and the electrical characteristic is inductance or hysteresis loss.10-11-2012
20120190957SYSTEM AND METHOD FOR MONITORING CARDIAC DISEASE - A method of monitoring progression of cardiac disease includes applying stimulus pulses to the heart and sensing electrophysiological responses of the heart at a plurality of different monitoring locations of the heart. The method also includes comparing a previously and subsequently sensed electrophysiological responses that are sensed near a first location of the monitoring locations and comparing previously and subsequently sensed electrophysiological responses that are sensed near a second location of the monitoring locations. The method further includes identifying a change in progression of cardiac disease of the heart based on a difference between the previously and subsequently sensed electrophysiological responses at the first location and based on a difference between the previously and subsequently sensed electrophysiological responses at the second location.07-26-2012
20120330121PROCESS OF MANUFACTURING A MEDICAL USE ELECTRICAL LEAD, AND ELECTRICAL LEADS FOR MEDICAL USE - A process for manufacturing an electrical lead having one or more electrodes includes providing an elongate member having at least one polymeric region and further having at least one electrical conductor that extends along at least a part of a length of the elongate member and that is contained in a wall of the elongate member. A length of the at least one electrical conductor is accessed at the at least one polymeric region. An electrically conductive adhesive is applied to the length of the at least one electrical conductor that has been accessed.12-27-2012
20120271137METHOD FOR MONITORING PHYSIOLOGICAL CYCLES OF A PATIENT TO OPTIMIZE PATIENT THERAPY - Improved methods for obtaining physiological parameters of a patient in accordance with various embodiments of the present invention can be used to monitor patient status and/or in conjunction with patient therapy. Physiological parameters can be monitored with an implantable device including a first lead and a second lead. Physiological parameters can be measured along at least three distinct vectors defined by the first lead and second lead, the first lead and an electrode located on the device body, and the second lead an the electrode. An output indicative of the physiological parameter can then be provided. Therapy, such as baroreflex therapy, can optionally be optimized based on the physiological measurements.10-25-2012
20120271136METHODS FOR DETECTION OF CARDIAC RHYTHM DISORDERS USING BASKET STYLE CARDIAC MAPPING CATHETER - A method for sensing multiple local electric voltages from endocardial surface of a heart, includes: providing a system for sensing multiple local electric voltages from endocardial surface of a heart, including: a first elongate tubular member having a lumen, a proximal end and a distal end; a basket assembly including: a plurality of flexible splines for guiding a plurality of exposed electrodes, the splines having proximal portions, distal portions and medial portions therein between, wherein the electrodes are substantially flat electrodes and are substantially unidirectionally oriented towards a direction outside of the basket.10-25-2012
20110230746METHOD, IMPLANTABLE MEDICAL DEVICE, AND SYSTEM FOR DETERMINING THE CONDITION OF A HEART VALVE - An implantable medical device has an impedance processor for determining atrial impedance data reflective of the cardiogenic impedance of an atrium of a heart during diastole and/or systole of heart cycle. Ventricular impedance data reflective of the cardiogenic impedance of a ventricle during diastole and/or systole are also determined. The determined impedance data are processed by a representation processor for estimating a diastolic and/or a systolic atrial impedance representation and a diastolic and/or a systolic ventricular impedance representation. A condition processor determines the presence of any heart valve malfunction, such as valve regurgitation and/or stenosis, of at least one heart valve based on the estimated atrial and ventricular impedance representations.09-22-2011
20100179411IMPLANTABLE MEDICAL DEVICE AND A METHOD COMPRISING MEANS FOR DETECTING AND CLASSIFYING VENTRICULAR TACHYARRHYTMIAS (As Amended) - In a method and implantable medical device for ventricular tachyarrhythmia detection and classification, upon detection of a ventricular tachyarrhythmia based on an electrocardiogram signal, cardiogenic impedance data representative of ventricular volume dynamics are collected and used for classifying the detected tachyarrhythmia as stable or unstable. In the latter case but typically not in the former case, defibrillation shocks or other forms of therapy are applied to combat the unstable ventricular tachyarrhythmia.07-15-2010
20120150009Lead For An Active Implantable Medical Device Wtih A Chip For Electrode Multiplexing - A lead for active implantable medical devices comprising a chip, notably for electrode multiplexing. The lead (06-14-2012
20130018246Basket Catheter Having Multiple Electrodes - Embodiments of the present invention provide a catheter that comprises an elongated catheter body (01-17-2013
20110160557TESTING COMMUNICATION DURING IMPLANTATION - A system and method are described for testing communication through a patient during implantation using telemetry coupling electrodes on a delivery catheter. In one example, at least two telemetry coupling electrodes may be placed on or within a delivery catheter to test conductive communication with external body electrodes during implantation. In some instances, the telemetry coupling electrodes of the delivery catheter may approximate the spacing of telemetry electrodes on an IMD. In this manner, testing conductively coupled communication with telemetry coupling electrodes of the catheter may be used to mimic the telemetry electrodes on the IMD and determine a target position and/or orientation of an electrode or electrodes of the IMD for successful conductive communication through the body.06-30-2011
20110160556CATHETER WITH STRAIN GAUGE SENSOR - A medical probe, including a flexible insertion tube, having a distal end for insertion into a body cavity of a patient and which is configured to be brought into contact with tissue in the body cavity. The probe further includes a sensor tube of an elastic material, contained inside the distal end of the insertion tube and configured to deform in response to forces exerted by the tissue on the distal end. The probe also includes a plurality of strain gauges fixedly attached to a surface of the sensor tube at different, respective locations and configured to generate respective signals in response to deformations of the sensor tube.06-30-2011
20130023746SYNCHRONIZATION OF WIRELESS CATHETERS - A method includes disposing multiple medical probes to acquire physiological data concurrently from a living body. The data is sent from the multiple medical probes by transmitting over wireless channels respective sequences of data packets that are marked with respective packet numbers. A synchronization signal that is broadcast to the multiple probes is received in the probes. In response to receiving the synchronization signal, the packet numbers that are to be assigned in the probes to subsequent data packets in the respective sequences are reset.01-24-2013
20080228060HIGH DENSITY MAPPING CATHETER - The present invention is directed to a high density mapping catheter including a number of shape memory electrode fibers and associated methods of construction ad operation. The invention ensures good electrical contact between a large number of mapping electrodes and cardiac tissue in relation to a number of cardiac tissue approach angles, including head-on approaches. In addition, the invention allows for a reduced range of deflection angles in relation to deployment and retraction of the electrode fibers, thereby reducing resistance to retraction and reducing stress on the fibers and associated concerns regarding patient safety. The catheter of the present invention allows for rapid acquisition of a large amount of mapping data and allows for a variety of different geometries in relation to sweeping of the catheter across the cardiac tissue.09-18-2008
20130172715ELECTRODE SUPPORT STRUCTURE ASSEMBLIES - An electrode support structure assembly is provided comprising an electrode support structure including a plurality of splines. Each of the plurality of splines can have a proximal end portion and a distal end portion. The assembly further comprises a first element defining an axis and comprising an outer surface. The outer surface comprises a plurality of slots configured to receive the distal end portion of each of the plurality of splines. The first element is configured such that the distal end portion of each of the plurality of splines may move with respect to each slot. In accordance with some embodiments, the distal end portion of each of the plurality of splines comprises a section configured for engagement with the first element, wherein the section comprises a shoulder.07-04-2013
20080221423Cardiac Catheter Imaging System - Systems and methods for measuring electrical potentials and other data associated with body tissue and generating electrograms of the tissue based on the data. In one embodiment, a device for measuring parameters of human tissue includes a multielectrode catheter for taking multiple measurements of the electrical characteristics of the human tissue, a concentric tube catheter located inside the multielectrode catheter, for providing structural support to the multi-electrode catheter and for serving as a conduit for advancing or withdrawing the multielectrode catheter over its surface; and an imaging catheter located inside the concentric tube catheter for taking multiple measurements of anatomical characteristics of the human tissue.09-11-2008
20120253161IMPEDANCE BASED ANATOMY GENERATION - Methods and systems for the determination and representation of anatomy anatomical information are disclosed herein.10-04-2012
20130096407FIXED DIMENSIONAL AND BI-DIRECTIONAL STEERABLE CATHETER CONTROL HANDLE - An apparatus for imparting a tensile force to deflect a distal portion of a catheter while maintaining its exterior dimensions may include a handle grip including a cross-section of generally predetermined exterior dimensions, and a longitudinal axis. A flexible elongate member may include proximal and distal end portions, with the proximal end portion being coupled to the handle grip. An adjustment knob may include a cross-section of generally predetermined exterior dimensions, and is rotatably coupled to the handle grip around the longitudinal axis. An elongate deflection member may be operably coupled to the adjustment knob and to the distal end portion of the elongate member. Rotation of the adjustment knob may impart a tensile force to the deflection member thereby causing the distal end portion of the elongate member to deflect from a prior configuration while maintaining the generally predetermined exterior dimensions of the handle grip and the adjustment knob.04-18-2013
20110224527ELECTROMEDICAL IMPLANT AND MONITORING SYSTEM INCLUDING THE ELECTROMEDICAL IMPLANT - An electromedical implant (09-15-2011
20120277567INTRA-CARDIAC TRACKING SYSTEM - In general, in one aspect, a method is disclosed for determining information about a position of an object. The method includes: (i) causing current to flow between each of three or more sets of current-injecting electrodes on a first catheter inserted into an organ in a patient's body, the organ having a periphery (ii) in response to current flow caused by each set of current injecting electrodes, measuring an electrical signal at each of one or more measuring electrodes located on one or more additional catheters inserted into the organ in the patient's body and (iii) determining the position of each of one or more of the measuring electrodes on the additional catheters relative to the first catheter based on the measured signals from the one or more measuring electrodes.11-01-2012
20130150695Medical Implant and Medical Arrangement - A medical implant comprising a transducer element which induces mechanical vibrations of the implant when electrically and/or magnetically controlled.06-13-2013
20130123598MRI-GUIDED DEVICES AND MRI-GUIDED INTERVENTIONAL SYSTEMS THAT CAN TRACK AND GENERATE DYNAMIC VISUALIZATIONS OF THE DEVICES IN NEAR REAL TIME - An MRI-compatible catheter includes an elongated flexible shaft having opposite distal and proximal end portions. A handle is attached to the proximal end portion and includes an actuator in communication with the shaft distal end portion that is configured to articulate the shaft distal end portion. The distal end portion of the shaft may include an ablation tip and includes at least one RF tracking coil positioned adjacent the ablation tip that is electrically connected to an MRI scanner. The at least one RF tracking coil is electrically connected to a circuit that reduces coupling when the at least one RF tracking coil is exposed to an MRI environment. Each RF tracking coil is a 1-10 turn solenoid coil, and has a length along the longitudinal direction of the catheter of between about 0.25 mm and about 4 mm.05-16-2013
20130184550MRI-COMPATIBLE IMPLANTABLE MEDICAL LEAD - An implantable medical lead (07-18-2013
20130190587HIGH-DENSITY ELECTRODE-BASED MEDICAL DEVICE SYSTEM - A medical device system is disclosed including a high-density arrangement of transducers, which may be configured to ablate, stimulate, or sense characteristics of tissue inside a bodily cavity, such as an intra-cardiac cavity. High-density arrangements of transducers may be achieved, at least in part, by overlapping elongate members on which the transducers are located, and varying sizes, shapes, or both of the transducers, especially in view of the overlapping of the elongate members. Also, the high-density arrangements of transducers may be achieved, at least in part, by including one or more recessed portions in an elongate member in order to expose one or more transducers on an underlying elongate member in a region adjacent an elongate-member-overlap region.07-25-2013
20120029335Subcutaneous Leads and Methods of Implant and Explant - New and/or alternative designs for implantable leads that have fixation structures to keep leads at a desired location after implant. Fixation structure may take several forms that create distally located fixation for use primarily in subcutaneous implantation. Some examples include new and/or alternative methods of implanting such leads. Some examples also include fixation structures, such as a suture sleeve, that can be attached to a lead for fixation thereof. Some further examples show methods of implanting a subcutaneous lead, and others include methods of extracting implanted subcutaneous leads.02-02-2012
20130197337MULTI-BEND STEERABLE MAPPING CATHETER - An electrophysiology catheter introduced through the groin and inferior vena cava into the right side of the heart comprises an elongate flexible shaft having a steerable distal section and a prolapsing section located proximally of the distal section. The distal section is inserted into the coronary sinus and a back-steering force is applied to the catheter to anchor the distal section therein, after which the catheter is further advanced to prolapse the prolapsing section against the high right atrium. Electrical pathways in both the coronary sinus and the high right atrium are mapped using respective electrode pairs carried on the distal and prolapsing sections of the catheter.08-01-2013

Patent applications in class Electrode placed in or on heart

Patent applications in all subclasses Electrode placed in or on heart