Implantable medical device with ventricular pacing protocol
First Claim
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1. A method of operating an implantable medical device (IMD) that provides cardiac pacing and sensing, the method comprising:
- operating the IMD in an atrial based pacing mode with a ventricular pacing protocol (VPP), wherein the VPP is a pacing protocol that provides multiple-beat AV coordination and minimizes ventricular pacing by tolerating a complete cardiac cycle devoid of ventricular activity while maintaining AV synchrony;
sensing for intrinsic ventricular activity;
determining the nature of the sensed ventricular activity;
operating normally in the atrial based pacing mode if the sensed ventricular activity is determined to be a properly conducted ventricular beat;
initiating a first response under the VPP if the sensed ventricular activity is determined to be a nodal rhythm; and
initiating a second response under the VPP if the sensed ventricular activity is determined to be a premature ventricular contraction (PVC), wherein the second response includes determining if the PVC is a first occurrence within a predetermined window; and
operating under the VPP as if no ventricular activity were sensed if the PVC is the first occurrence.
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Abstract
An implantable medical device operates to promote intrinsic ventricular depolarization according to a pacing protocol. The medical device determines a course of action based upon the presence or absence of sensed ventricular activity. The device further determines whether that activity is properly conducted or the result of a PVC or nodal rhythm.
111 Citations
19 Claims
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1. A method of operating an implantable medical device (IMD) that provides cardiac pacing and sensing, the method comprising:
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operating the IMD in an atrial based pacing mode with a ventricular pacing protocol (VPP), wherein the VPP is a pacing protocol that provides multiple-beat AV coordination and minimizes ventricular pacing by tolerating a complete cardiac cycle devoid of ventricular activity while maintaining AV synchrony; sensing for intrinsic ventricular activity; determining the nature of the sensed ventricular activity; operating normally in the atrial based pacing mode if the sensed ventricular activity is determined to be a properly conducted ventricular beat; initiating a first response under the VPP if the sensed ventricular activity is determined to be a nodal rhythm; and initiating a second response under the VPP if the sensed ventricular activity is determined to be a premature ventricular contraction (PVC), wherein the second response includes determining if the PVC is a first occurrence within a predetermined window; and operating under the VPP as if no ventricular activity were sensed if the PVC is the first occurrence. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An implantable medical device (IMD) comprising:
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means for cardiac sensing and pacing; means for distinguishing regular ventricular events from improper ventricular events; means for controlling the means for cardiac sensing and pacing according to a Ventricular Pacing Protocol (VPP) that respond in a first manner to the regular ventricular event and in a second manner for the improper ventricular event, wherein the response in the second manner includes determining if the improper ventricular event is a first occurrence within a predetermined window; and operating under the VPP as if no ventricular activity were sensed if the improper ventricular event is the first occurrence; wherein the VPP is a pacing protocol that provides multiple-beat AV coordination and minimizes ventricular pacing by tolerating a complete cardiac cycle devoid of ventricular activity while maintaining AV synchrony. - View Dependent Claims (18, 19)
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Specification