Preferred ADI/R: a permanent pacing mode to eliminate ventricular pacing while maintaining backup support
AssigneeMedtronic, Inc.
InventorsDavid Casavant, Paul A. Belk, Thomas J. Mullen, John C. Stroebel
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Abstract
An ADI/R mode is implemented using an intelligent pacing system to continually monitor ventricular response. This ensures AV conduction whenever possible so as to gain all the benefits of cardiac contractile properties resulting from native R-waves. In the event where AV conduction is blocked, the pacing mode is switched to a DDD/R mode to ensure a paced R-wave. Thereafter, subsequent to a completed interval of a p-wave, ADI/R pacing resumes to monitor ventricular response.
Claims38
A method of selectively providing cardiac pacing with an implantable medical device (IMD) comprising:
- operating the IMD in an atrial based pacing mode;
- monitoring A-A intervals for ventricular activity;
- switching to a dual chamber pacing mode if no ventricular activity is sensed in a given A-A interval and operating in the dual chamber pacing mode for at least two consecutive A-A intervals immediately subsequent to the given A-A interval;
- determining if intact AV conduction is present subsequent to switching to the dual chamber pacing mode;
- and
- switching to the atrial based pacing mode if intact AV conduction is present.
An implantable medical device (IMD) for selectively providing cardiac pacing comprising:
- means for operating the IMD in an atrial based pacing mode;
- means for monitoring A-A intervals for ventricular activity;
- means for switching to a dual chamber pacing mode if no ventricular activity is sensed in a given A-A interval;
- means for operating in the dual chamber pacing mode for at least two consecutive A-A intervals immediately subsequent to the given A-A interval;
- means for determining if intact AV conduction is present subsequent to switching to the dual chamber pacing mode;
- and
- means for switching the IMD back to the atrial based pacing mode if intact AV conduction is found.
Dependencies are inferred from the claim text.