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Updated: Jun 12, 2026
Implantation of the Syncardia Total Artificial Heart
Published on: July 18, 2014
Heart transplantation in the United States from 1998 to 2008
Mepur H Ravindranath1, Matthew J Everly
1Terasaki Foundation Laboratory, Los Angeles, California, USA.
Insights
Ethnicity significantly impacts heart transplant outcomes, with African Americans experiencing shorter graft survival than Caucasians. This disparity persists despite medical advancements, highlighting a critical need for further research into corrective factors.
Area of Science:
- Cardiology and Transplant Medicine
- Health Disparities Research
- Immunology and Organ Transplantation
Background:
- Heart transplantation is a vital treatment for end-stage heart disease in the United States.
- Previous studies indicate potential ethnic variations in transplant outcomes, necessitating further investigation.
Purpose of the Study:
- To analyze the influence of ethnicity on graft survival and identify risk factors for graft loss in heart transplant recipients.
- To compare outcomes between Caucasian and African American heart transplant populations over a 20-year period.
Main Methods:
- Retrospective analysis of the United Network for Organ Sharing (UNOS) registry data from January 1, 1988, to December 31, 2008.
- Examination of graft survival rates, median survival times, and risk factors for graft loss using univariate and multivariate analyses.
- Comparison of trends in transplant numbers and outcomes between different ethnic groups, particularly Caucasians and African Americans.
Main Results:
- Overall graft survival was 36% at 10 years and 54% at 20 years post-transplant.
- African Americans showed an increasing trend in transplants (66.6% in the past decade), while Caucasians showed a declining trend (21.5%).
- Median survival was significantly shorter for African Americans (7.5 years) compared to Caucasians (10.5 years), a disparity unchanged over 21 years.
- Post-transplant dialysis and treated rejection were common risk factors for graft loss in both groups.
- Younger African Americans were identified as being at the highest risk for graft loss.
Conclusions:
- Ethnicity is a significant factor influencing heart transplant graft loss, with persistent disparities between Caucasian and African American recipients.
- Identified risk factors like post-transplant dialysis and treated rejection are common, but do not fully explain the ethnic gap.
- Further research into modifiable risk factors and multi-center trials are crucial to address and bridge racial disparities in heart transplantation.
Abstract:
In The United States, heart transplantation has become a standard treatment for those with end-stage heart disease. The UNOS registry from January 1, 1988 and December 31, 2008 was examined. Heart transplants were performed in 35,670 Caucasian Americans, 6,123 African Americans and 4301 Hispanics, Asian Americans and others. Graft survival rates were 36% at 10 and 54% at 20 years post-transplant for the whole cohort. There was a declining trend (21.5% in the past decade) in the number in Caucasians and an increasing trend (66.6% in the past decade) in the number of African Americans transplanted. Ethnicity emerged as an important factor influencing graft loss. Median survival time was 10.5 years for Caucasians and 7.5 years for African Americans. This difference has not changed over the last 21 years despite many changes to transplant surgery and immunosuppression. Several risk factors of graft loss differed in univariate analyses between the 2 populations. A multivariate analysis of the risk factors of Caucasians and African Americans yielded both similarities and differences. The hazard factors indicative of increased graft loss common to both ethnic groups were posttransplant dialysis and treated rejection. No clear modifiable risk factor stands out that might address the disparity between the groups, although younger African Americans were at highest risk for graft loss. Analysis of other variables in single center and multicenter trials will be necessary to discern possible corrective factors to bridge the gap between the races.
