Supraventricular Tachycardia and Atrioventricular Block

Duy Thai Nguyen; Nitish Badhwar

doi:10.1016/j.ccep.2010.01.010

Supraventricular Tachycardia and Atrioventricular Block

Card Electrophysiol Clin. 2010 Jun;2(2):235-238. doi: 10.1016/j.ccep.2010.01.010.

Authors

Duy Thai Nguyen¹, Nitish Badhwar

Affiliation

¹ Division of Cardiology, Section of Cardiac Electrophysiology, University of California-San Francisco, 500 Parnassus Avenue, MU East 4, Box 1354, San Francisco, CA 94143, USA.

PMID: 28770757
DOI: 10.1016/j.ccep.2010.01.010

Abstract

The differential diagnosis for a mid- to long-RP supraventricular tachycardia include atrial tachycardia, atypical atrioventricular nodal reentrant tachycardia (AVNRT), and atrioventricular reentrant tachycardia (AVRT) utilizing a slowly conducting concealed accessory pathway. The presence of spontaneous atrioventricular block excludes AVRT. This case reviews pacing maneuvers to distinguish atrial tachycardia from AVNRT. Atypical AVNRT generally demonstrates the presence of a lower common pathway and has its site of earliest retrograde atrial activation near the coronary sinus ostium, which would be the target for ablation.