Suppression of Storms of Ventricular Tachycardia by Epicardial Ablation of Isolated Delayed Potential in Noncompaction Cardiomyopathy |
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| Authors: | MASAOMI CHINUSHI M.D. KENICHI IIJIMA M.D. HIROSHI FURUSHIMA M.D. DAISUKE IZUMI M.D. AKINORI SATO M.D. NOBUE YAGIHARA M.D. KANAE HASEGAWA M.D. HIROSHI WATANABE M.D. KYOKO SOEJIMA M.D. YOSHIFUSA AIZAWA M.D. |
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| Affiliation: | 1. First Department of Internal Medicine, School of Health Science, Niigata University School of Medicine, , Niigata, Japan;2. Department of Cardiology, Kawasaki Municipal Hospital, , Kawasaki, Japan |
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| Abstract: | 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. |
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| Keywords: | ventricular noncompaction ventricular tachycardia electrical storm epicardial catheter ablation |
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