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Narrow QRS Complex Tachycardia with Atrioventricular Dissociation
Author(s) -
SHIMIZU AKIHIKO,
OHE TOHRU,
TAKAKI HIROSHI,
KAMAKURA SHIRO,
MATSUHISA MOKUO,
SATO IWAO,
SHIMOMURA KATSURO
Publication year - 1988
Publication title -
pacing and clinical electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.686
H-Index - 101
eISSN - 1540-8159
pISSN - 0147-8389
DOI - 10.1111/j.1540-8159.1988.tb05997.x
Subject(s) - medicine , cardiology , qrs complex , tachycardia , verapamil , sinus rhythm , electrophysiology study , reentry , left bundle branch block , electrocardiography , electrical conduction system of the heart , electrophysiology , anesthesia , catheter ablation , ablation , atrial fibrillation , heart failure , calcium
We describe the case of a 22‐year‐old man who had frequent episodes of narrow QRS complex tachycardia with atrioventricular dissociation. The ECG during sinus rhythm showed normal PR and QRS intervals, hut it showed a left bundle branch block configuration during atrial pacing or after injection of verapamil. An electrophysiological study demonstrated that the patient had nodoventricular Mahaim fibers. The narrow QRS complex tachycardia was explained by a circuit involving antegrade conduction via the atrioventricular nodo‐His axis and retrograde conduction via the nodoventricular bypass tract.