Self Limited Rate Response
First Claim
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1. An implantable medical device comprising:
- means for providing atrial based rate responsive pacing; and
means for controlling VA encroachment.
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Abstract
Rate responsive pacing is limited in an atrial based pacing mode by the AV interval in order to avoid or minimize ventricular encroachment of atrial pacing. The AV or VA interval is used to permit rate responsiveness; modulate rate responsiveness or to determine a dynamic upper sensor rate.
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Citations
20 Claims
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1. An implantable medical device comprising:
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means for providing atrial based rate responsive pacing; and
means for controlling VA encroachment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An implantable medical device (IMD) comprising:
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a rate responsive pacing module;
an atrial pacing and sensing lead coupled with the pacing module;
a ventricular event sensor;
a demand sensor in communication with the pacing module that senses a parameter indicative of an activity level and outputs a demand signal to the pacing module proportional to the sensed activity level; and
a rate response modulation module in communication with the pacing module that controls an upper rate limit of the pacing module based upon an interval defined by intrinsic ventricular activity sensed by the ventricular event sensor. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A method comprising:
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measuring a AV interval;
determining an averaged AV interval value over a predetermined number of cardiac cycles; and
setting a minimum A-A interval in a rate responsive, atrial based pacing mode wherein the minimum A-A interval is the averaged AV interval plus a predetermined constant. - View Dependent Claims (18, 19, 20)
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Specification