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Atrioventricular Nodal Supraventricular Tachycardia with 2:1 Block above the Bundle of His
Author(s) -
SCHMITT CLAUS,
MILLER JOHN M.,
JOSEPHSON MARK E.
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.tb03946.x
Subject(s) - medicine , cardiology , supraventricular tachycardia , tachycardia , bundle of his , reentry , atrial tachycardia , electrophysiology study , electrocardiography , left bundle branch block , anesthesia , electrical conduction system of the heart , atrial fibrillation , catheter ablation , heart failure
A patient with narrow complex supraventricular tachycardia underwent electrophysiological study at which time a tachycardia was initiated which had 2:1 AV conduction, with block occurring above the His bundle. The modes of tachycardia initiation, as well as the responses to atrial and ventricular premature depolarizations during tachycardia, made a diagnosis of atrioventricular nodal reentry as the tachycardia mechanism. The unusual finding of 2:1 supra‐His block suggests the presence of tissue situated between the tachycardia circuit and His bundle, and effectively excludes the possibility of a His‐atrial bypass tract as the retrograde limb of the tachycardia circuit.