| Patent application number | Description | Published |
|---|
| 20080234773 | CLOSED-LOOP RESYNCHRONIZATION THERAPY FOR MECHANICAL DYSSYNCHRONY - An apparatus comprises a first impedance sensing circuit, a second sensing circuit, and an impedance-based cardiac dyssynchrony detector. The impedance sensing circuit senses an intracardiac local impedance signal that is indicative of a cardiac local wall motion of a first cardiac region from an implantable first bipolar pair of impedance sensing electrodes. The second sensing circuit is configured to produce a second sensor signal indicative of cardiovascular activity. The impedance-based cardiac dyssynchrony detector is configured for detecting cardiac dyssynchrony using a relationship between the first intracardiac local impedance signal and the second sensor signal. Other apparatuses and methods are disclosed. | 09-25-2008 |
| 20090012416 | MONITORING LUNG FLUID STATUS USING THE CARDIAC COMPONENT OF A THORACIC IMPEDANCE-INDICATING SIGNAL - This patent document describes, among other things, systems and methods for monitoring lung fluid status, such as monitoring the presence or absence of pulmonary edema, in a subject using information about the cardiac impedance-indicating component of a measured impedance-indicating signal. In various examples, an amplitude or contribution change over multiple cardiac cycles of the cardiac impedance-indicating component is used to compute and provide a lung status indication. In various examples, a decreasing amplitude or contribution trend of the cardiac impedance-indicating component signifies an increasing amount of fluid in the subject's lungs, as a greater portion of an injected thoracic impedance measurement current formerly traversing the heart is rerouted through the lung due to the less resistance path created by the fluid accumulation therein. In another example, measurements of the impedance-indicating signal, and thus the cardiac impedance-indicating component, are taken at one or a combination of end-inspiration or end-expiration. | 01-08-2009 |
| 20090062671 | PERIODIC SAMPLING OF CARDIAC SIGNALS USING AN IMPLANTABLE MONITORING DEVICE - In a method of diagnosing an atrial fibrillation or atrial flutter condition, a monitoring device implanted in a subject acquires strips of a subcutaneous ECG signal of a predetermined length. The strips are acquired at regular, periodic intervals, and the timing of when the strips are acquired is not triggered by analysis of the subcutaneous ECG signal by the monitoring device. The acquired subcutaneous ECG strips are stored in memory of the implanted monitoring device, and transmitted from the implanted monitoring device for receipt by an external analysis system. In the external analysis system, the received subcutaneous ECG strips are processed to generate information for an assessment of an atrial fibrillation or atrial flutter burden for the subject. | 03-05-2009 |
| 20090326387 | Electrocardiogram and Respiration Monitoring in Animals - An ambulatory animal monitoring system includes a wearable structure constructed to be worn about a body of a non-human animal to be monitored. The system includes a plurality of electrical signal conduits each associated with the wearable structure and each connectable to a different one of a plurality of surface electrode components. The system includes processing and control device adapted to be worn with the wearable structure, the processing and control device comprising a) an ECG monitoring component and b) an impedance level monitoring component that generates data indicative of electrical impedance levels of the animal over time. | 12-31-2009 |
| 20090326390 | Pressure and Oxygen Saturation Monitoring Devices and Systems - Pressure and oxygen saturation monitoring devices and systems are disclosed. The devices, or portions thereof, can be implanted within a subject for monitoring blood pressure and oxygen saturation. | 12-31-2009 |
| 20090326398 | SENSING BIOLOGICAL DATA - A system is provided for obtaining and analyzing biological data of a subject. The system includes a biological data recording device that can sense biological signals of a subject over time and record the sensed biological signals as biological data. The system also includes an event time recording device that is physically separate from, and does not communicate with, the biological data recording device. The event time recording device includes a user actuatable component, and also includes a recording component that records user actuation data, which includes a time stamp indication as to when any instances of user actuation occurred. The system also includes equipment that can periodically receive the recorded biological data from the biological data recording device and the user actuation data from the event time recording device, and can correlate the biological data and the user actuation data to generate correlated biological data. | 12-31-2009 |
| 20090326598 | Pressure Sensing Lead Systems for Implantable Stimulators - Various different implementations of lead systems are disclosed for use with implantable stimulation systems. Generally, the lead systems incorporate, within an elongate lead body, one or more electrical conduits that connect to one or more distal electrodes, and a liquid-filled pressure transmission catheter lumen that extends proximally from a distal entry port. Use of the lead systems allows accurate pressure sensing at a location near where the electrodes are positioned. In addition, a defibrillator lead is disclosed having such features, and a system using that lead is capable of directly monitoring pressure within a heart chamber, and using that information to confirm the delivery of a defibrillation pulse. | 12-31-2009 |
| 20100063412 | MONITORING FLUID IN A SUBJECT USING AN ELECTRODE CONFIGURATION PROVIDING NEGATIVE SENSITIVITY REGIONS - An amount of fluid in a thoracic or other region of a subject may be monitored by internally injecting an electrical energy stimulus (e.g., constant voltage source) through the region, detecting voltage resulting from the electrical energy stimulus, and calculating a fluid volume indicative signal. The injected energy stimulus creates a first lead field. The responsive voltage is detected using an electrode configuration that defines a second lead field, which is arranged in a negative sensitivity configuration with respect to the first lead field at the region being monitored. | 03-11-2010 |
| 20110077540 | METHOD AND APPARATUS FOR DETECTING FIBRILLATION USING CARDIAC LOCAL IMPEDANCE - A cardiac rhythm management (CRM) system detects tachyarrhythmia using cardiac local impedance indicative of cardiac local wall motion. A cardiac local impedance signal indicative of an impedance of a cardiac region is sensed by using a pair of bipolar electrodes placed in that cardiac region. Tachyarrhythmia such as VF is detected by analyzing one or more cardiac local impedance signals sensed in one or more cardiac regions. | 03-31-2011 |
