Multi-site cardiac stimulation device and method for detecting retrograde conduction
AssigneePacesetter, Inc.
InventorAnthony Mo
Life of this patent
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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.
Claims40
A method of detecting retrograde conduction from a ventricular stimulation site to avoid pacemaker-mediated tachycardia during substantially concurrent, multi-site ventricular stimulation, the method comprising:
- determining that a high ventricular stimulation rate is sustained for a predetermined number of cycles during an atrial sensing mode;
- identifying two or more ventricular stimulation sites associated with a retrograde conduction pathway;
- temporarily interrupting substantially concurrent stimulations to the two or more ventricular stimulation sites;
- and
- alternating stimulation to the two or more ventricular stimulation sites.
A cardiac stimulation device for detecting retrograde conduction from a ventricular stimulation site to avoid pacemaker-mediated tachycardia during substantially concurrent, multi-site ventricular stimulation, comprising:
- an atrial sensor that senses atrial events;
- a pulse generator that generates stimulation pulses to be delivered to the ventricles;
- a control circuit, connected to the atrial sensor and pulse generator, that controls the pulse generator to generate stimulation pulses at a rate based on the sensed atrial events, and that causes a high intrinsic atrial rate to trigger a retrograde conduction detection routine when a high ventricular stimulation rate is sustained for a predetermined number of cycles during an atrial sensing mode;
- a ventricular sensor that identifies two or more ventricular stimulation sites associated with a retrograde conduction pathway;
- and
- wherein the control circuit temporarily interrupts substantially concurrent stimulations to the two or more ventricular stimulation sites, and alternates the stimulation of the two or more ventricular stimulation sites.
A cardiac stimulation device for detecting retrograde conduction from a ventricular stimulation site to avoid pacemaker-mediated tachycardia during multi-site ventricular stimulation, comprising:
- means for stimulating the ventricles;
- means for triggering a retrograde conduction detection routine when a high ventricular stimulation rate is sustained for a predetermined number of cycles during an atrial sensing mode;
- means for identifying two or more ventricular stimulation sites associated with a retrograde conduction pathway;
- and
- wherein the triggering means temporarily interrupts substantially concurrent stimulations to the two or more ventricular stimulation sites, and alternates the stimulation of the two or more ventricular stimulation sites.
Dependencies are inferred from the claim text.