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European Journal of Cardio-Thoracic Surgery, Vol 6, 642-647, Copyright © 1992 by European Association for Cardio-thoracic Surgery

ARTICLES

Dynamic cardiomyoplasty for long-term cardiac assist

JC Chachques, C Acar, M Portoghese, D Bensasson, P Guibourt, P Grare, VA Jebara, PA Grandjean and A Carpentier
Service de Chirurgie Cardiovasculaire, Hopital Broussais, Paris, France.

The principle of cardiomyoplasty is long-term electrostimulation of a latissimus dorsi muscle (LDM) wrapped around the failing heart. Technically, this procedure consists of placing the left LDM flap around the heart via a window created by partial resection of the 2nd or 3rd rib, and subsequent muscle electrostimulation in synchrony with ventricular systole. The aim of cardiomyoplasty is to support ventricular function in ischemic or dilated cardiomyopathies, or to partially replace the ventricular myocardium after large aneurysm or tumor resections. Our clinical experience at Broussais Hospital involves 44 patients. The functional class and quality of life improved after cardiomyoplasty. Improvement of the ventricular performance and limitation of cardiac dilatation were demonstrated over the long-term. The actuarial survival at 6 years was 71%. Risk factors influencing perioperative mortality were: age > 65 years, associated surgical procedures, pulmonary vascular hypertension, and patients hemodynamically unstable or on inotropic drug support. Preoperative risk factors influencing the long-term mortality were: permanent NYHA functional class 4, cardiothoracic ratio > 0.60, LV ejection fraction < 15%, bi-ventricular heart failure, and atrial fibrillation. Cardiomyoplasty does not preclude the use of future orthotopic heart transplantation.

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