pacemaker-mediated tachycardia

pacemaker-mediated tachycardia
in patients with dual chamber pacemakers, tachycardia caused by retrograde conduction of ventricular impulses, either premature ventricular complexes or impulses triggered by ventricular pacing which are sensed by the atria and trigger a subsequent ventricular impulse. An endless loop may develop, in which case it is called endless loop tachycardia.

Medical dictionary. 2011.

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