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The Annals of Thoracic Surgery, Vol 49, 261-271, Copyright © 1990 by The Society of Thoracic Surgeons

ARTICLES

Experience with univentricular support in mortally ill cardiac transplant candidates

RL Kormos, HS Borovetz, T Gasior, JF Antaki, JM Armitage, JM Pristas, RL Hardesty and BP Griffith
Department of Surgery, University of Pittsburgh School of Medicine, Pennsylvania 15261.

Between July 1987 and March 1989, 11 patients underwent left ventricular support with the Novacor left ventricular assist system irrespective of apparent degree of right ventricular failure. The first 2 patients died of multisystem organ failure while on support. All the remaining patients survived the support period, and actuarial survival after transplantation was 100% at 6 months and 89% at 1 year. In no patient did bacterial infection develop during support or after transplantation. Right ventricular ejection fraction before implantation of the left ventricular assist system was lower than 15% in 6 of 8 patients, yet it increased twofold during left ventricular support. The need for excessive inotropic support (2 patients) or temporary (four days) mechanical right ventricular support (2 patients) while on the left ventricular support system appeared to be related to elevated pulmonary vascular resistance during support in association with large preimplantation ventricular volumes. It appears that even patients with compromised right ventricular performance can be supported long term with a left ventricular assist device. Patients with elevated pulmonary vascular resistance may require temporary right ventricular support.

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