Multi-site cardiac stimulation device and method for detecting retrograde conduction
First Claim
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1. In an implantable cardiac stimulation device, a method comprising:
- delivering stimulation energy to at least two ventricular sites during at least some cardiac cycles;
detecting that a potential pacemaker-mediated tachycardia condition exists; and
alternating the delivery of stimulation energy to the at least two ventricular sites during subsequent cardiac cycles to terminate a retrograde conduction arising from one of the at least two ventricular sites.
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Abstract
An implantable cardiac stimulation device, such as a pacemaker, defibrillator and/or cardioverter, and an associated method that provide cardiac stimulation to at least two ventricular stimulation sites, within a single ventricle or across two ventricles. A high intrinsic atrial rate triggers a retrograde conduction detection routine when a high ventricular stimulation rate is sustained for a predetermined number of cycles during an atrial sensing mode. This routine interrupts concurrent stimulation, and alternates the stimulation output to the different ventricular sites.
35 Citations
20 Claims
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1. In an implantable cardiac stimulation device, a method comprising:
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delivering stimulation energy to at least two ventricular sites during at least some cardiac cycles;
detecting that a potential pacemaker-mediated tachycardia condition exists; and
alternating the delivery of stimulation energy to the at least two ventricular sites during subsequent cardiac cycles to terminate a retrograde conduction arising from one of the at least two ventricular sites. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An implantable cardiac stimulation device comprising:
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a sensor that is operative to detect cardiac activity;
a pulse generator that is operative to generate stimulation pulses to be delivered to at least two ventricular sites during normal cardiac cycles; and
a control circuit that is coupled to the sensor and that is operative to detect a potential pacemaker-mediated tachycardia condition based on the cardiac activity sensed by the sensor, wherein the control circuit is operative to control the pulse generator to alternate the stimulation of the at least two ventricular sites during subsequent cycles to terminate a retrograde conduction arising from one of the at least two ventricular sites. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An implantable cardiac stimulation device comprising:
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means for delivering substantially concurrent ventricular stimulation pulses to at least two ventricular sites during at least some cardiac cycles;
means for detecting a potential retrograde conduction condition; and
means for alternating the stimulation of the two or more ventricular stimulation sites to terminate a retrograde conduction arising from one of the at least two ventricular sites. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification