Open AccessIdiopathic verapamil‐sensitive sustained left ventricular tachycardia
Author(s) -
Ohe Tohru
Publication year - 1993
Publication title -
clinical cardiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.263
H-Index - 72
eISSN - 1932-8737
pISSN - 0160-9289
DOI - 10.1002/clc.4960160211
Subject(s) - medicine , reentry , verapamil , cardiology , right bundle branch block , qrs complex , tachycardia , ventricular tachycardia , left axis deviation , left bundle branch block , anesthesia , electrocardiography , heart failure , calcium
Idiopathic verapamil‐sensitive left ventricular tachycardia (VT) has characteristic QRS configurations during VT: right bundle‐branch block with either left axis or right axis (less common) deviation. QRS duration is relatively narrow (0.13‐0.16s) and frequently endocardial activation prior to QRS is recorded during VT, which is the basis of its being called fascicular tachycardia. The mechanism is probably reentry, but the nature of the slow conduction necessary for the occurrence of reentry is quite different from that of other sustained monomorphic VT associated with structural heart disease. Chronic oral verapamil therapy is the drug of choice for alleviation of symptoms. Long‐term prognosis is good.