Which of the following statement(s) is/are true concerning the results of cardiac transplantation?

a. Overall one-year survival is approximately 80%

d. The survival rate for retransplantation is approximately 50%

Collected data from a multi-center registry has shown that the overall one-year survival following cardiac transplantation is 80%. Overall five-year survival is approximately 65%. Survival in patients receiving heterotopic cardiac transplants is significantly lower than in patients receiving hearts in the orthotopic position. The overall oneyear survival rate for retransplantation as reported from the same registry is only 54%. In the pediatric age group, actuarial survival at two years is 80% and 76% at five years.