Unusual Response to His-refractory atrial premature complex: what is the mechanism?

A 32-year-old woman underwent radiofrequency catheter ablation of narrow QRS tachycardia (NQT) that was terminated with intravenous adenosine. Twelve-lead ECG was normal during sinus rhythm. The electrophysiological study showed normal AH and HV intervals during sinus rhythm. This article is protected by copyright. All rights reserved.