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pacemaker-mediated tachycardia
tachycardia in a patient with a dual chamber pacemaker, caused by retrograde conduction of ventricular impulses (either premature ventricular complexes or impulses that are triggered
by ventricular pacing), which are sensed by the atria and trigger a subsequent ventricular impulse, sometimes leading to development
of an endless loop (endless loop tachycardia).

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