Pacemaker Timing Cycles 6 - Wiley-Blackwell

265 Understanding various pacing modes and paced electrocardiograms (ECGs)requires a thorough understanding of Pacemaker Timing Cycles . Pacemakertiming Cycles include all potential variations of a single complete pacing cycle the time from paced ventricular beat to paced ventricular beat;the time frompaced ventricular beat to an intrinsic ventricular beat, whether it is a conductedR wave or a premature ventricular contraction (PVC); the time from pacedatrial beat to paced atrial beat; the time from intrinsic atrial beat to paced atrialbeat; the time from intrinsic ventricular beat to paced ventricular beat; and soforth. These Cycles include events sensed, events paced, and periods when thesensing circuit or circuits are refractory. Each portion of the Pacemaker timingcycle should be considered in milliseconds and not in pulses per minute (ppm).

tion,P-synchronous pacing,the designation is PV.Because the pacemaker timing cycle in dual-chamber pacing has more portions to consider than single-

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