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The Journal of Thoracic and Cardiovascular Surgery, Vol 90, 212-224, Copyright © 1985 by The American Association for Thoracic Surgery and The Western Thoracic Surgical Association

ARTICLES

Right ventricular isolation procedures for nonischemic ventricular tachycardia

JL Cox, GH Bardy, RJ Damiano Jr, LD German, JM Fedor, JA Kisslo, DL Packer and JJ Gallagher

Nonischemic ventricular tachycardia most commonly arises in the right ventricular free wall and is frequently refractory to medical therapy. Many different types of surgical procedures have been employed to treat medically refractory nonischemic ventricular tachycardia arising in the right ventricle, but the results of these procedures have been less than optimal. The majority of these surgical procedures have been directed toward ablation of the site (or sites) of origin of the tachyarrhythmia and have failed because of the frequent occurrence of multifocal or polymorphic ventricular tachycardia in these patients. We first employed localized surgical isolation procedures to control nonischemic ventricular tachycardia arising in the right ventricular free wall in 1979. These localized procedures evolved into the development of a technique for isolating the entire right ventricular free wall from the remainder of the heart to control ventricular tachyarrhythmias arising from multiple sites in the right ventricle. Case histories are reported of two patients who underwent localized isolation procedures in 1979 as well as two patients who underwent total disconnection of the right ventricle in 1982. The follow-up period in these four patients ranges from 2 to 5 years and the control of their tachyarrhythmias has been uniformly successful. However, surgical isolation of the entire right ventricular free wall has resulted in progressive dilatation of the right ventricle as documented by serial echocardiography. The pathophysiology of the progressive right ventricular dilatation postoperatively is discussed in terms of etiology and prevention, and the indications for application of localized and total isolation procedures for nonischemic right ventricular tachycardia are outlined.

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