Atrial cardioverter with window based atrial tachyarrhythmia detection system and method
First Claim
1. An implantable atrial cardioverter for delivering therapy to atria of a human heart if an atrial tachyarrhythmia is present, the cardioverter comprising:
- first sensing means for sensing atrial heart activity within the right atrium of the heart for providing an atrial electrogram having a plurality of cardiac cycles;
second sensing means for sensing ventricular activity of the heart to provide a ventricular electrogram;
an atrial tachyarrhythmia detector including detection window means responsive to at least the ventricular electrogram to identify for each cardiac cycle of the atrial electrogram, a detection window period free of any heart activity other than spontaneous atrial heart activity, an A wave detector for identifying A waves occurring during each detection window period means for determining atrial cycle lengths between the identified A waves, and decision means responsive to the determined atrial cycle lengths for determining if an atrial tachyarrhythmia is present; and
cardioverting means responsive to the atrial tachyarrhythmia detector for delivering therapy to the atria of an atrial tachyarrhythmia is present.
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Accused Products
Abstract
There is disclosed an implantable atrial cardioverter for delivering therapy to atria of a human heart if an atrial tachyarrhythmia is present. The cardioverter includes a first sense channel for sensing atrial heart activity within the right atrium of the heart for providing an atrial electrogram having a plurality of cardiac cycles and a second sense channel for sensing ventricular activity of the heart to provide a ventricular electrogram. The cardioverter further includes an atrial tachyarrhythmia detector including a detection window stage responsive to at least the ventricular electrogram to identify for each cardiac cycle of the atrial electrogram, a detection window period free of any heart activity other than spontaneous atrial heart activity, an A wave detector for identifying A waves occurring during each detection window period means for determining atrial cycle lengths between the identified A waves, and a decision stage responsive to the determined atrial cycle lengths for determining if an atrial tachyarrhythmia is present. A cardioverting stage delivers therapy to the atria if an atrial tachyarrhythmia is present.
150 Citations
17 Claims
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1. An implantable atrial cardioverter for delivering therapy to atria of a human heart if an atrial tachyarrhythmia is present, the cardioverter comprising:
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first sensing means for sensing atrial heart activity within the right atrium of the heart for providing an atrial electrogram having a plurality of cardiac cycles; second sensing means for sensing ventricular activity of the heart to provide a ventricular electrogram; an atrial tachyarrhythmia detector including detection window means responsive to at least the ventricular electrogram to identify for each cardiac cycle of the atrial electrogram, a detection window period free of any heart activity other than spontaneous atrial heart activity, an A wave detector for identifying A waves occurring during each detection window period means for determining atrial cycle lengths between the identified A waves, and decision means responsive to the determined atrial cycle lengths for determining if an atrial tachyarrhythmia is present; and cardioverting means responsive to the atrial tachyarrhythmia detector for delivering therapy to the atria of an atrial tachyarrhythmia is present. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of delivering therapy to atria of a human heart if an atrial tachyarrhythmia is present the method including the steps of:
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sensing atrial heart activity within the right atrium of the heart to provide an atrial electrogram having a plurality of cardiac cycles; sensing ventricular activity of the heart to provide a ventricular electrogram; responsive to at least the ventricular electrogram, identifying, for each cardiac cycle of the atrial electrogram, a detection window period free of any heart activity other than spontaneous atrial heart activity; identifying A waves occurring during each detection window period; determining atrial cycle lengths between the identified A waves; responsive to the determined atrial cycle lengths, determining if an atrial tachyarrhythmia is present, and delivering cardioverting therapy to the atria if an atrial tachyarrhythmia is present. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification