Trainee experience on ischemic times and outcomes following orthotopic heart transplantation.

Abstract

This study was designed to evaluate the association of surgical training on outcomes following orthotopic heart transplantation in all levels of cardiothoracic surgery fellows. A retrospective cohort analysis was performed on all heart transplants at a single institution from 2011 to 2020. Transplants performed using organ preservation systems (n = 10) or with significant missing data were excluded (n = 37), resulting in 154 transplants performed by faculty surgeons and 799 total transplants performed by first-year Accreditation Council for Graduate Medical Education fellows (n = 73), second-year Accreditation Council for Graduate Medical Education fellows (n = 124), or non-Accreditation Council for Graduate Medical Education fellows (n = 602) in a transplantation and mechanical circulatory support fellowship. Primary outcome was warm ischemic time analyzed by year of fellowship. Additional secondary outcomes included 30-day mortality, primary graft dysfunction, reoperation for bleeding, and 5-year survival. Median follow-up was 3 years (interquartile range [IQR], 1.0-5.5 years) and 100% complete. The median number of transplants performed was 30 (IQR, 19.5-51.8) during the study period performed by 22 trainees. Baseline transplant characteristics performed were similar amongst the trainee years, although the first-year Accreditation Council for Graduate Medical Education fellows approached significantly fewer re-do transplants (1.4% vs 8.1% and 4.3%; P = .07). Warm ischemic time was lower in the first-year fellows (49 minutes; IQR, 42-63 minutes) versus second-year fellows (56.5 minutes; IQR, 45.5-69 minutes) and mechanical circulatory support/transplant fellows (56 minutes; IQR, 46-67 minutes) (P = .028). Crossclamp time was also lower in the first-year fellows than in second-year and mechanical circulatory support/transplant fellows, respectively (79 minutes; IQR, 65-100 minutes vs 147 minutes; IQR, 125-176 minutes and 143 minutes; IQR, 119-175 minutes) (P = .008). Secondary outcomes, including 30-day mortality (4.1% [n = 3] vs 2.4% [n = 3] vs 2.7% [n = 16]; P = .76), primary graft dysfunction (5.5% [n = 4] vs 4.0% [n = 5] vs 4.3% [n = 26]; P = .88), reoperation for bleeding (2.7% [n = 2] vs 4.8% [n = 6] vs 4.2% [n = 25]; P = .78), and 5-year survival (82.2%; 95% CI, 66.7%-84.9% vs 77.3%; 95% CI, 66.7%-84.9% vs 79.3%; 95% CI, 74.9%-83.1%; P = .84) were comparable in all groups. This cohort of nearly 800 operations demonstrates that orthotopic heart transplantation may be performed by cardiac fellowship trainees all levels of training with acceptable short- and long-term outcomes.