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Suppression of Storms of Ventricular Tachycardia by Epicardial Ablation of Isolated Delayed Potential in Noncompaction Cardiomyopathy
Author(s) -
CHINUSHI MASAOMI,
IIJIMA KENICHI,
FURUSHIMA HIROSHI,
IZUMI DAISUKE,
SATO AKINORI,
YAGIHARA NOBUE,
HASEGAWA KANAE,
WATANABE HIROSHI,
SOEJIMA KYOKO,
AIZAWA YOSHIFUSA
Publication year - 2013
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.1540-8159.2010.02999.x
Subject(s) - medicine , cardiology , ventricular tachycardia , qrs complex , radiofrequency ablation , ablation , tachycardia , implantable cardioverter defibrillator , cardiomyopathy , left ventricular noncompaction , heart failure
A 65‐year‐old recipient of an implantable cardioverter defibrillator suffering from ventricular noncompaction developed storms of ventricular tachycardia (VT). Epicardial voltage mapping revealed the presence of a large low‐voltage area in the left ventricular apical and inferoposterior wall, and isolated delayed potential was recorded over 1.5 cm in the posterior border between low and normal myocardial voltage. Pacemapping at the delayed potential recording site produced two different QRS depending on pacing output strength, and these two QRS morphologies were similar to clinically documented VTs. During one of the VTs, a mid‐diastolic potential was recorded from the site with the delayed potential, and rapid pacing produced concealed entrainment. After epicardial radiofrequency ablation of the isolated delayed potential, VTs were noninducible and the VT storm was suppressed .