Ventriculoatrial Block During Atrioventricular Nodal Reentrant Tachycardia Utilizing Multiple Retrograde Pathways

• Published in: Journal of cardiovascular electrophysiology Vol. 9; no. 11; pp. 1206 - 1213
• Main Authors: INO, TAKESHI, TADERA, TAKESHI, MIYAMOTO, SHINJIROH, TANAKA, KOTOKO, OHNO, TADAAKI, NAGASAWA, KOICHI, HAYAKAWA, HIROKAZU
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Publishing Ltd 01-11-1998
• Subjects: atrioventricular nodal reentrant tachycardia; Bundle of His - physiopathology; Electric Stimulation; Heart Block - complications; Heart Block - diagnosis; Heart Block - physiopathology; Heart Conduction System - physiology; Humans; intermediate pathway; intranodal reentry; Male; Middle Aged; multiple retrograde pathways; Neural Pathways - physiology; Tachycardia, Atrioventricular Nodal Reentry - complications; Tachycardia, Atrioventricular Nodal Reentry - diagnosis; Tachycardia, Atrioventricular Nodal Reentry - physiopathology; Ventricular Function; ventriculoatrial block
• ISSN: 1045-3873; 1540-8167
• DOI: 10.1111/j.1540-8167.1998.tb00093.x

VA Block During Multiple AVNRT. A rare case of narrow QRS tachycardia continuing despite the occurrence of VA block is reported. Right ventricular stimulation suggested dual AV nodal physiology. The tachycardia was induced by ventricular premature stimulation, which failed to depolarize the atrium. Two types of tachycardia that had different retrograde conduction sequences, HA intervals, and cycle lengths were induced. The occurrence of VA block did not terminate the tachycardia but transiently prolonged the tachycardia cycle length. These findings suggest the mechanism is AV nodal reentry utilizing multiple retrograde pathways with intranodal reentry bridging the VA block and maintaining the tachycardia.