The Annals of Thoracic Surgery, Vol 49, 333-340, Copyright © 1990 by The Society of Thoracic Surgeons
Surgical management of heart-lung transplantation
B Reichart, S Vosloo and J Holl
Department of Cardio-Thoracic Surgery, University of Cape Town Medical School, Groote Schuur Hospital, South Africa.
Using cyclosporin A, long-term survival after heart-lung transplantation
became possible. The drug blocks the immune system more selectively and
leaves the tracheal wound healing unimpaired. Since 1981, 501 clinical
cases have been collected by the registry of the International Society for
Heart Transplantation. Candidates for heart- lung transplantation reveal
signs of irreversible heart and lung diseases that may have been caused by
cardiac lesions (valvular diseases, Eisenmenger reaction due to congenital
malformations) or by pulmonic disorders (primary pulmonary hypertension,
emphysema, fibrosis). The standard surgical procedure, which combines donor
and recipient tracheas, right atria, and aortas, makes three anastomoses
necessary. Immunosuppressive regimen includes cyclosporin A (blood trough
levels of 300 to 500 ng/mL), azathioprine (1 to 2 mg/kg), and rabbit
antithymocyte globulin (1 to 4 mg immunoglobulin G/kg). After the first two
postoperative weeks, rabbit antithymocyte globulin is replaced by
methylprednisolone (0.3 to 0.1 mg/kg; 500 mg are given intravenously after
opening the aortic cross-clamp; 3 x 125 mg on postoperative day 1). After
heart-lung transplantation an extreme variety of problems may evolve. Early
postoperative complications (within the first postoperative month) comprise
acute isolated lung rejection, multiorgan failure, and bacterial pneumonia.
Diagnosis of acute lung rejection proves difficult; it includes clinical
signs, chest radiographic appearances, and cytoimmunological monitoring.
Transbronchial lung biopsies are of similar value for precise diagnosis as
are endomyocardial specimens after heart transplantation. Late
postoperative complications (after 1 postoperative month) comprise viral
pneumonia, fungal infection, tuberculosis, and chronic obliterative
bronchiolitis.(ABSTRACT TRUNCATED AT 250 WORDS)