| Patent application number | Description | Published |
|---|
| 20080269816 | Method and Apparatus to Deliver Mechanically Fused Pacing Therapy - A medical device system and method for delivering mechanically fused left ventricular cardiac stimulation. A sensor monitors left ventricular acceleration while left ventricular cardiac stimulation is provided at an AV interval. The left ventricular acceleration is used to calculate a mechanical response interval and the mechanical response interval is compared to a desired mechanical response interval. The AV interval is adjusted until the mechanical response interval is equal to the desired mechanical response interval. | 10-30-2008 |
| 20090248103 | APPARATUS AND METHODS OF OPTIMIZING VENTRICLE-TO-VENTRICULAR PACING DELAY INTERVALS - Provided herewith are methods and apparatus for optimizing ventricle-to-ventricle (V-V) pacing delay intervals based upon ECG-based optimization calculated as a linear function of P-wave duration sensed PR (intrinsic) interval sensed (or paced) QRS duration and heart rate. Since the relationship among these parameters is linear once the coefficients are solved (which can be any value, including null) with reference to a known optimized V-V interval such as from an echocardiographic study, an operating V-V interval value can be dynamically adjusted in an ambulatory subject. The various combinations of values can be loaded into a look up table or calculated automatically. And, since some of the parameters do not typically change much over time they can be determined acutely and fed into the equation while the other values can be measured more frequently. The parameter values can be measured by an implantable medical device such as a dual- or triple-chamber pacemaker. | 10-01-2009 |
| 20100016914 | APPARATUS AND METHODS FOR AUTOMATIC ADJUSTMENT OF AV INTERVAL TO ENSURE DELIVERY OF CARDIAC RESYNCHRONIZATION THERAPY - The disclosure provides methods and apparatus of left ventricular pacing including automated adjustment of a atrio-ventricular (AV) pacing delay interval and intrinsic AV nodal conduction testing. It includes—upon expiration or reset of a programmable AV Evaluation Interval (AVEI)—performing the following: temporarily increasing a paced AV interval and a sensed AV interval and testing for adequate AV conduction and measuring an intrinsic atrio-ventricular (PR) interval for a right ventricular (RV) chamber. Thus, in the event that the AV conduction test reveals a physiologically acceptable intrinsic PR interval then storing the physiologically acceptable PR interval in a memory structure (e.g., a median P-R from one or more cardiac cycles). In the event that the AV conduction test reveals an AV conduction block condition or if unacceptably long PR intervals are revealed then a pacing mode-switch to a bi-ventricular (Bi-V) pacing mode occurs and the magnitude of the AVEI is increased. | 01-21-2010 |
| 20100198291 | FUSION PACING INTERVAL DETERMINATION - Delivery of fusion pacing therapy to a later depolarizing ventricle (V | 08-05-2010 |
| 20100286541 | DETECTING ELECTRICAL CONDUCTION ABNORMALITIES IN A HEART - Techniques are described for detecting conduction abnormalities in a heart of a patient. In particular, an IMD may be configured to obtain electrical signals corresponding to cardiac activity of the heart of the patient and periodically analyze a most recent electrical signal of the obtained electrical signals to detect an electrical conduction abnormality of the heart. The IMD adjusts a frequency at which the most recent electrical signal is analyzed based on at least one physiological parameter of the patient. For example, the IMD may increase the frequency at which the most recent electrical signal is analyzed when a heart rate parameter has significantly changed and the number of detected premature ventricular contractions (PVCs) is greater than or equal to a threshold number. In this manner, the most recent electrical signal is analyzed at a higher frequency in situations in which conduction abnormalities are more likely. | 11-11-2010 |
