Apparatus and method for ventricular rate regularization
First Claim
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1. A cardiac rhythm management device, comprising:
- a sensing circuit for sensing ventricular depolarizations of the heart;
a pacing circuit for pacing the heart based at least in part on a lower rate limit; and
, a controller for measuring an intrinsic ventricular rate of the heart based on the sensed ventricular depolarizations and adjusting the lower rate limit of the device based on a previous value of the lower rate limit and the measured intrinsic ventricular rate.
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Abstract
A cardiac rhythm management device which employs pacing therapy to regularize the ventricular rhythm. Such ventricular rate regularization may be employed with in bradycardia pacemakers, ventricular resynchronization devices, or implantable cardioverter/defibrillators.
93 Citations
28 Claims
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1. A cardiac rhythm management device, comprising:
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a sensing circuit for sensing ventricular depolarizations of the heart;
a pacing circuit for pacing the heart based at least in part on a lower rate limit; and
,a controller for measuring an intrinsic ventricular rate of the heart based on the sensed ventricular depolarizations and adjusting the lower rate limit of the device based on a previous value of the lower rate limit and the measured intrinsic ventricular rate. - View Dependent Claims (2, 3, 4, 5)
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6. A cardiac rhythm management device, comprising:
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a circuit for sensing ventricular depolarizations from one or both of the ventricles of the heart;
a pacing circuit for pacing both ventricles based at least in part on a lower rate limit; and
,a controller for measuring an intrinsic ventricular rate of the heart based on the sensed depolarizations of at least one of the ventricles and adjusting the lower rate limit based upon a previous value of the lower rate limit and the detected intrinsic ventricular rate. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 16, 17, 18, 19, 20, 21, 22, 24, 25, 26, 27, 28)
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15. A cardiac rhythm management device, comprising:
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a sensing circuit for sensing ventricular activity of the heart;
a pacing circuit for pacing the heart based at least in part on a lower rate limit;
a controller for detecting an intrinsic ventricular rate of the heart based on the sensed ventricular activity and adjusting the lower rate limit of the device based upon the detected intrinsic ventricular rate and a previous value of the lower rate limit;
a fibrillation detector for detecting ventricular fibrillation of the heart based on the sensed ventricular activity; and
a shock pulse generator for applying a ventricular defibrillation shock to the heart after detection of fibrillation.
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23. A cardiac rhythm management device, comprising:
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a ventricular sensing circuit for sensing ventricular depolarizations of the heart;
an atrial sensing circuit for sensing atrial activity of the heart;
a pacing circuit for pacing the heart based at least in part on a lower rate limit;
a controller for detecting an intrinsic ventricular rate of the heart based on the sensed ventricular depolarizations and adjusting the lower rate limit of the device based on the detected intrinsic ventricular rate and a previous value of the lower rate limit;
a fibrillation detector for detecting atrial fibrillation of the heart based on the sensed atrial activity; and
a shock pulse generator for applying an atrial defibrillation shock to the heart after detection of atrial fibrillation, the shock pulse generator timing the shock based on one or more of the ventricular depolarizations.
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Specification