Clockwise and counter-clockwise circulation of wavefronts around an anatomical obstacle as one mechanism of two morphologies of sustained ventricular tachycardia in patients after a corrective operation of tetralogy of Fallot.
Two different monomorphic VTs were observed in two patients after a corrective operation for tetralogy of Fallot. The activation pattern of the wavefronts of the two VTs were different: in a counter-clockwise direction around the anatomical obstacle due to a ventriculotomy of the right ventricle in one VT; and in a clockwise direction around the same obstacle in the other VT. The different revolutions of the wavefronts could be the mechanism for the different morphologies of VT.
Chinushi
M
M
First Department of Internal Medicine, Niigata University School of Medicine, Japan.
Aizawa
Y
Y
Kitazawa
H
H
Takahashi
K
K
Washizuka
T
T
Shibata
A
A
D000293:Adolescent; D000328:Adult; D002304:Cardiac Pacing, Artificial; D002921:Cicatrix; D004562:Electrocardiography; D005260:Female; D006329:Heart Conduction System / Q000503:physiopathology*; D006352:Heart Ventricles / Q000601:surgery; D006801:Humans; D008297:Male; D011183:Postoperative Complications / Q000503:physiopathology*; D017180:Tachycardia, Ventricular / Q000209:etiology / Q000503:physiopathology*; D013771:Tetralogy of Fallot / Q000503:physiopathology / Q000601:surgery*