Journal of Atrial Fibrillation – Journal of Atrial Fibrillation & Electrophysiology (JAFIB-EP)

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Underlying Rhythm

Questions : What is happening in this EGM?


This is an underlying rhythm freeze for an Abbott dual chamber pacemaker. What is the underlying rhythm? Mobitz II block. Notice the sinus(atrial) rate is approximately 90bpm and the ventricular rate is approximately half that at 48bpm.