System and method for conditional biventricular pacing
First Claim
1. A medical device, comprising:
- an atrial pacing lead;
a right ventricular lead;
a left ventricular lead; and
a microprocessor operably coupled with the atrial pacing lead, the right ventricular lead and left ventricular lead and configured to receive cardiac signals from the leads and to provide pacing stimuli according to a minimal bi-ventricular pacing protocol (MBVP) in the absence of atrial fibrillation (AF) and to provide pacing stimuli according to a conditional triple chamber pacing protocol (CTCP) if AF is present.
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Accused Products
Abstract
An implantable pacing system with single, double and triple chamber pacing capabilities, provided individually or in concert on a conditional or continuous basis depending upon ongoing analyses of atrial rhythm status, atrioventricular conduction status and ventricular rate. A mode is selected to reduce the occurrence of any ventricular pacing in favor of intrinsic atrioventricular and ventricular conduction. If excessively long PR intervals are occurring too frequently or atrioventricular conduction is unreliable or absent, the implantable pulse generator is operated in a conditional triple chamber pacing mode that provides atrial-synchronous biventricular pacing in every cardiac cycle for a period of time as necessary to restore and maintain AV synchrony, while minimizing ventricular asynchrony otherwise associated with monochamber RV pacing as in conventional dual chamber pacing systems. Similarly, biventricular pacing is provided in every cardiac cycle when ventricular rates are undesirably slow during atrial fibrillation, where AV synchronization is excluded.
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Citations
27 Claims
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1. A medical device, comprising:
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an atrial pacing lead; a right ventricular lead; a left ventricular lead; and a microprocessor operably coupled with the atrial pacing lead, the right ventricular lead and left ventricular lead and configured to receive cardiac signals from the leads and to provide pacing stimuli according to a minimal bi-ventricular pacing protocol (MBVP) in the absence of atrial fibrillation (AF) and to provide pacing stimuli according to a conditional triple chamber pacing protocol (CTCP) if AF is present. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A non-transitory computer readable medium having computer executable instructions for performing a method in a medical device, the method comprising:
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operating the device in a minimal biventricular pacing (MBVP) mode; sensing cardiac signals; determining whether atrial fibrillation is present in response to the sensed cardiac signals; and operating the device in a conditional triple chamber pacing (CTCP) mode if atrial fibrillation is present.
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16. A method of delivering therapy in a medical device, the method comprising:
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operating the device in a minimal biventricular pacing (MBVP) mode; sensing cardiac signals; determining whether atrial fibrillation is present in response to the sensed cardiac signals; and operating the device in a conditional triple chamber pacing (CTCP) mode if atrial fibrillation is present. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification