title: Suppression of storms of ventricular tachycardia by epicardial ablation of isolated delayed potential in noncompaction cardiomyopathy.
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.
authors.affiliation: First Department of Internal Medicine, School of Health Science, Niigata University School of Medicine, Niigata, Japan. masaomi@clg.niigata-u.ac.jp
authors.forename: Masaomi
authors.initials: M
authors.lastname: Chinushi
authors.forename: Kenichi
authors.initials: K
authors.lastname: Iijima
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Furushima
authors.forename: Daisuke
authors.initials: D
authors.lastname: Izumi
authors.forename: Akinori
authors.initials: A
authors.lastname: Sato
authors.forename: Nobue
authors.initials: N
authors.lastname: Yagihara
authors.forename: Kanae
authors.initials: K
authors.lastname: Hasegawa
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Watanabe
authors.forename: Kyoko
authors.initials: K
authors.lastname: Soejima
authors.forename: Yoshifusa
authors.initials: Y
authors.lastname: Aizawa
mesh_terms: D000368:Aged; D009202:Cardiomyopathies / Q000503:physiopathology* / Q000601:surgery*; D017115:Catheter Ablation / Q000379:methods*; D017023:Coronary Angiography; D017147:Defibrillators, Implantable; D004562:Electrocardiography; D006801:Humans; D056830:Isolated Noncompaction of the Ventricular Myocardium / Q000503:physiopathology* / Q000601:surgery*; D008297:Male; D010496:Pericardium / Q000601:surgery; D017180:Tachycardia, Ventricular / Q000503:physiopathology* / Q000601:surgery*