Pacemaker and method for ventricular rate limit operation and termination of pacemaker mediated tachycardia

摘要: A microprocessor-controlled pacemaker is programmed to extend an atrial refractory interval in response the detection of events which could initiate a pacer sustained tachycardia. The extended ensures that spurious event resulting from retrograde conduction ventricle will not cause pace ventricle. also break out tachycardia by inhibiting ventricular when predefined number previous successive paces have occurred at rate limit. further so high rate, paced either upper limit value or decremented fallback value. increases VA show Wenckebach behavior and thereby occasionally drop exceeds resets defined two are provided less than nonphysiological after pace. If detected during interval, time period following initiating event.