Lung transplantation following prior cardiac surgical procedures

Background: As lung transplant candidates are older with increased comorbidities, we sought to examine the prevalence and outcomes of lung transplant recipients after prior cardiac surgery. Methods: Lung transplants were identified from the United Network for Organ Sharing/Organ Procurement and Transplantation Network Database. Patients were stratified based on prior cardiac surgery (no surgery [NS], prior coronary artery bypass grafting [CABG], prior valve [Valve]). Unadjusted comparisons were performed among all groups, and propensity matching was utilized for adjusted comparisons. Survival was examined with Kaplan-Meier methods. Results: A total of 28,710 patients were identified, 467 (1.6%) had prior CABG and 84 (0.3%) had prior valvular surgery. Before matching, the NS group was significantly younger, less commonly male, and had lower lung allocation scores. There were significantly fewer bilateral lung transplants in the CABG and Valve groups. Length of stay was shortest in the CABG group, but there were no significant differences in postoperative stroke, dialysis, or in-hospital mortality. There was an increased incidence of cardiac/cerebrovascular cause of death in CABG recipients (18.3%) and malignancy death in Valve recipients (23.3%). Following matching, CABG 5-year survival was lower than NS (p