Jumping Across the Gap - A Series of Atrial Extrastimuli

Abstract

The “gap phenomenon” is an interesting phenomenon in electrophysiology arising from the differences in refractory periods at two or more levels of the atrioventricular (AV) conduction system. We present a patient with dual AV nodal physiology in whom the AH jump mediates the gap phenomenon. We also briefly discuss the other mechanisms of gap phenomenon that have been described in this setting.

Keywords

• gap phenomenon
• Atrial Extrastimuli