I found extra information for those curious about statistics involving human heart transplantation [1]:
"The most recent data of the registry of the International Society of Heart and Lung Transplantation indicates a current 1-year survival of 84.5% and a 5-year survival of 72.5%. This has significantly improved as compared to the 76.9% 1-year survival and 62.7% 5-year survival in the 1980s. The development of new immunosuppressive drugs which allow a variety of immunosuppressive regimens, tailored to the individual patient, has contributed to this success, since rejection and the adverse effects of immunosuppression could be better controlled. After 20 years, ca. 21% of patients are still alive, according to the international registry. In some experienced centers, long-term survival is reported to be even higher. The University Hospital Zurich has achieved a 20-year survival rate of 55.6%.
The improvement in outcome over the decades is related mainly to an increase in survival over the first year. After this period, the attrition rate of ca. 3-4% per year has remained similar over the different eras. This might be attributable to the fact that it was not possible to reduce the incidence of long-term complications after heart transplantation, such as chronic allograft vasculopathy (CAV) and malignancies, which account for ca. 35% of all deaths after 10 to 15 years."
"The most recent data of the registry of the International Society of Heart and Lung Transplantation indicates a current 1-year survival of 84.5% and a 5-year survival of 72.5%. This has significantly improved as compared to the 76.9% 1-year survival and 62.7% 5-year survival in the 1980s. The development of new immunosuppressive drugs which allow a variety of immunosuppressive regimens, tailored to the individual patient, has contributed to this success, since rejection and the adverse effects of immunosuppression could be better controlled. After 20 years, ca. 21% of patients are still alive, according to the international registry. In some experienced centers, long-term survival is reported to be even higher. The University Hospital Zurich has achieved a 20-year survival rate of 55.6%.
The improvement in outcome over the decades is related mainly to an increase in survival over the first year. After this period, the attrition rate of ca. 3-4% per year has remained similar over the different eras. This might be attributable to the fact that it was not possible to reduce the incidence of long-term complications after heart transplantation, such as chronic allograft vasculopathy (CAV) and malignancies, which account for ca. 35% of all deaths after 10 to 15 years."
[1] https://www.ncbi.nlm.nih.gov/labs/pmc/articles/PMC4387387/