Capture management during left ventricular pacing therapy in a cardiac medical device and medical device system
First Claim
1. A method of determining capture during delivery of a ventricular pacing therapy in a medical device system, comprising:
- sensing a subcutaneous cardiac signal and emitting a trigger signal in response to the sensed cardiac signal;
delivering the ventricular pacing therapy to the left ventricle in response to the emitted trigger signal;
comparing a beat of the subcutaneous cardiac signal sensed subsequent to the ventricular pacing therapy being delivered to the left ventricle to a baseline intrinsic template associated with a non-paced beat; and
determining whether the delivered ventricular pacing therapy captures the left ventricle in response to the comparing;
determining whether the device is in a VDD pacing mode or a VVI pacing mode;
determining a timing window including the sensed beat in response to determining whether the device is in the VDD pacing mode or the VVI pacing mode;
wherein the comparing step comprises comparing the sensed beat within the timing window to the baseline intrinsic template and determining a correlation between the sensed beat within the timing window and the baseline intrinsic template; and
wherein the step of determining whether the delivered ventricular pacing therapy captures the left ventricle comprises determining whether the delivered ventricular pacing therapy captures the left ventricle in response to the correlation.
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Accused Products
Abstract
A medical device and medical device system for determining capture during delivery of a ventricular pacing therapy that includes a subcutaneous sensing device comprising a subcutaneous electrode to sense a subcutaneous cardiac signal and to emit a trigger signal in response to the sensed cardiac signal, an intracardiac therapy delivery device capable of being implanted within a left ventricle of a heart to receive the trigger signal and deliver the ventricular pacing therapy to the left ventricle in response to the emitted trigger signal, and a processor positioned within the subcutaneous sensing device, the processor configured to compare a beat of the subcutaneous cardiac signal sensed by the sensing device subsequent to the ventricular pacing therapy being delivered to a baseline template associated with a non-paced beat, and determine whether the delivered ventricular pacing therapy captures the left ventricle in response to the comparing.
83 Citations
12 Claims
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1. A method of determining capture during delivery of a ventricular pacing therapy in a medical device system, comprising:
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sensing a subcutaneous cardiac signal and emitting a trigger signal in response to the sensed cardiac signal; delivering the ventricular pacing therapy to the left ventricle in response to the emitted trigger signal; comparing a beat of the subcutaneous cardiac signal sensed subsequent to the ventricular pacing therapy being delivered to the left ventricle to a baseline intrinsic template associated with a non-paced beat; and determining whether the delivered ventricular pacing therapy captures the left ventricle in response to the comparing; determining whether the device is in a VDD pacing mode or a VVI pacing mode; determining a timing window including the sensed beat in response to determining whether the device is in the VDD pacing mode or the VVI pacing mode; wherein the comparing step comprises comparing the sensed beat within the timing window to the baseline intrinsic template and determining a correlation between the sensed beat within the timing window and the baseline intrinsic template; and wherein the step of determining whether the delivered ventricular pacing therapy captures the left ventricle comprises determining whether the delivered ventricular pacing therapy captures the left ventricle in response to the correlation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification