Dual chamber pacemaker which detects, confirms and terminates pacemaker mediated tachycardia
First Claim
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1. A method of confirming the presence of pacemaker mediated tachycardia (PMT) following the initial detection thereof comprising the steps of:
- (a) measuring the intrinsic rate of the patient'"'"'s heart,(b) adjusting the minimum V-V interval, corresponding to the maximum pacing rate of the pacemaker, to be slightly longer than the intrinsic interval corresponding to said measured rate,(c) determining whether the A-V Delay intervals in successive cycles progressively increase in Wenckebach fashion or remain constant, and(d) confirming the presence of PMT if the A-V Delay intervals in successive cycles remain constant.
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Abstract
A dual-chamber pacemaker for confirming pacemaker mediated tachycardia (PMT) after initial detection. The minimum V-V pacing interval is extended to be slightly longer than the interval of the sensed atrial rate. If the A-V Delay intervals in successive cycles remain constant, as opposed to progressively increasing in Wenckebach fashion, then PMT is confirmed.
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Citations
21 Claims
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1. A method of confirming the presence of pacemaker mediated tachycardia (PMT) following the initial detection thereof comprising the steps of:
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(a) measuring the intrinsic rate of the patient'"'"'s heart, (b) adjusting the minimum V-V interval, corresponding to the maximum pacing rate of the pacemaker, to be slightly longer than the intrinsic interval corresponding to said measured rate, (c) determining whether the A-V Delay intervals in successive cycles progressively increase in Wenckebach fashion or remain constant, and (d) confirming the presence of PMT if the A-V Delay intervals in successive cycles remain constant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A dual-chamber pacemaker comprising means for generating atrial pacing pulses, means for generating ventricular pacing pulses, means for sensing atrial P-waves, means for sensing ventricular R-waves, and means for confirming the presence of pacemaker mediated tachycardia (PMT) following the initial detection thereof;
- said confirming means including means for measuring the intrinsic rate of the patient'"'"'s heart, means for adjusting the minimum V-V interval, corresponding to the maximum pacing rate of the pacemaker, to be slightly longer than the intrinsic interval corresponding to said measured rate, means for determining whether the A-V Delay intervals in successive cycles progressively increase in Wenckebach fashion or remain constant, and means for confirming the presence of PMT if the A-V Delay intervals in successive cycles remain constant.
- View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
Specification