The Annals of Thoracic Surgery, Vol 37, 382-386, Copyright © 1984 by The Society of Thoracic Surgeons
Results of radionuclide assessment of cardiac function following transplantation of the heart
DC McGiffin, RB Karp, JR Logic, WN Tauxe and R Ceballos
Radionuclide assessment of ejection fraction was determined early and late
postoperatively following cardiac transplantation in 16 patients. In 11
patients, ejection fraction was determined within 48 hours of an
endocardial biopsy. There was no relationship between the severity of
histologically evident rejection and the ejection fraction (Pearson
correlation coefficient [r] = -0.11; p = 0.47). In 2 patients, severe graft
fibrosis developed with consequent diminution in ejection fraction. There
was no relationship between severity and duration of rejection or the
amount of immunosuppression required to treat acute rejection and the
development of graft fibrosis. The mean resting ejection fraction in 7
patients in follow-up ranging from 6 to 21 months after transplantation was
0.59 +/- 0.06 (standard deviation), and the mean exercise ejection fraction
in 6 of these patients was 0.72 +/- 0.08. Radionuclide-determined ejection
fraction is not predictive of rejection early after operation. During
short-term late follow-up, systolic left ventricular function at rest and
exercise has been retained at normal levels.