Circulation: Arrhythmia And Electrophysiology On The Beat

Dr Paul Wong:                   Welcome to the monthly podcast on the beat for Circulation: Arrhythmia and Electrophysiology. I'm Dr Paul Wong, Editor-in Chief with some of the key highlights from this month's issue.                                                 This month's issue is dedicated to a new exciting topic, His bundle pacing. His bundle pacing is designed to achieve a more physiological human dynamic response than right ventricular pacing alone, which may be needed in patients with AV conduction abnormalities. In our first paper, Marek Jastrzebski and associates examined whether program stimulation may be used to distinguish nonselective His bundle capture from right ventricular myocardial capture. Premature beats were introduced at 10 millisecond steps during intrinsic rhythm, and also after a drive train of 600 milli seconds. The longest coupling interval that resulted in an abrupt change in the QRS morphology was considered equal to the effective refractory period of the His bundle or right v