Acute cardiac events and mortality by age in the LT patient study group by age, cardiac risk factors, and results of preoperative cardiac stress test. AR: arrhythmia, cath: cardiac catheterization, DSE: Dobutamine stress echocardiogram, HF: heart failure, IO: intraoperative, MI: myocardial infarction, PO: perioperative period up until hospital discharge, and PD: time period from hospital discharge to 4 months posttransplant.