System and method for preventing recurrence of atrial tachyarrhythmia
First Claim
1. A system, comprising:
- a first electrode; and
control circuitry, the control circuitry coupled to the first electrode, wherein the control circuitry includes a sensor to sense a cardiac signal through the first electrode, and wherein the control circuitry further includes;
a pacing pulse generator coupled to the first electrode, wherein the pacing pulse generator produces pacing pulses to be delivered through the first electrode;
a pulse rate controller coupled to the pacing pulse generator, wherein the pacing pulse generator is controlled by the pulse rate controller to generate pacing pulses at a pacing rate; and
an intrinsic rate detector coupled to the pulse rate controller and the sensor, wherein the pulse rate controller decreases the pacing rate from an initial value that is well above an intrinsic rate until an intrinsic contraction is detected in the cardiac signal by the intrinsic rate detector, wherein the intrinsic rate detector determines an intrinsic rate from the detected intrinsic contraction, and wherein the pulse rate controller increases the pacing rate of the pacing pulses above the intrinsic rate.
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Abstract
A system and method for providing pacing pulses after a cardioversion/defibrillation shock, where the pacing pulses have a pacing rate at an initial value. The pacing rate is decreased from the initial value until at least one intrinsic cardiac contraction is detected. In one embodiment, the pacing rate is decreased by a set amount after pacing a set number of cardiac cycles. Providing the set number of pacing pulses and decreasing the pacing rate by the set amount is then repeated until at least one intrinsic cardiac contraction is detected. An intrinsic cardiac rate is then determined from the at least one intrinsic cardiac contraction. The pacing rate is then increased and maintained to be above (i.e., greater than) the intrinsic cardiac rate.
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Citations
10 Claims
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1. A system, comprising:
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a first electrode; and
control circuitry, the control circuitry coupled to the first electrode, wherein the control circuitry includes a sensor to sense a cardiac signal through the first electrode, and wherein the control circuitry further includes;
a pacing pulse generator coupled to the first electrode, wherein the pacing pulse generator produces pacing pulses to be delivered through the first electrode;
a pulse rate controller coupled to the pacing pulse generator, wherein the pacing pulse generator is controlled by the pulse rate controller to generate pacing pulses at a pacing rate; and
an intrinsic rate detector coupled to the pulse rate controller and the sensor, wherein the pulse rate controller decreases the pacing rate from an initial value that is well above an intrinsic rate until an intrinsic contraction is detected in the cardiac signal by the intrinsic rate detector, wherein the intrinsic rate detector determines an intrinsic rate from the detected intrinsic contraction, and wherein the pulse rate controller increases the pacing rate of the pacing pulses above the intrinsic rate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system, comprising:
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at least one electrode, sized and shaped for being disposed in association with an atrium of a heart of a subject;
a control circuit, coupled to the at least one electrode, the control circuit comprising;
a sensor, coupled to the at least electrode, to sense an intrinsic atrial cardiac signal from the at least one electrode;
a pacing pulse generator, coupled to the at least one electrode, to deliver atrial pacing pulses to the at least one electrode;
a defibrillation pulse generator, coupled to the at least one electrode, to deliver an atrial defibrillation energy to the at least one electrode; and
a pulse rate controller, coupled to the pacing pulse generator to control the pacing pulse generator to generate pacing pulses at an atrial pacing rate that has an initial value, just after the atrial defibrillation energy is delivered to the at least one electrode, that is well above an intrinsic atrial heart rate of the intrinsic atrial cardiac signal, and wherein the pulse rate controller decreases the atrial pacing rate from said initial value until an intrinsic atrial contraction is detected in the atrial cardiac signal and then increases the atrial pacing rate to just above the intrinsic atrial heart rate.
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Specification