Cardiovascular screening and long-term outcomes in aircraft pilots.

Abstract

Pilots face significant occupational risks affecting cardiometabolic health and are subject to regulatory health screenings. Cardiometabolic risk factors, cardiac screening findings and outcomes among pilots have not been well reported. This study aimed to investigate cardiac evaluations of asymptomatic aircraft pilots and the association between clinical risk factors and outcomes. Asymptomatic aircraft pilots referred for cardiac assessment between January 1991 and May 2023 were studied. Baseline characteristics, cardiac test findings and outcomes were evaluated. Major adverse clinical event (MACE) was defined as death, myocardial infarction, stroke, major arrhythmia, heart failure event or cardiac-related hospitalisation and estimated using Kaplan-Meier methods. Significant valvular disease by echocardiography was defined as stenosis, regurgitation or prolapse of moderate severity or greater. Aortic dilation by transthoracic echocardiogram (TTE) was defined as measuring ≥40 mm in diameter. 212 pilots met eligibility criteria for the study. The majority were white (92.9%) and male (91%) with a mean age of 58.5±10.9 years. Mean body mass index was 27.8±4.8 with comorbid hyperlipidaemia (48%), hypertension (32%), prior cancer (27%), sleep apnoea (15%), arrhythmia (12%) and known coronary artery disease (6%). Imaging revealed significant valvular disease (2.4%) and dilated aortas (16%) based on TTEs. Functional cardiac testing performed showed mean functional aerobic capacity of 109±24.6% reaching 11.89±2.65 metabolic equivalents with <8% showing positive findings per EKG or wall motion abnormalities on exercise TTE. Six patients received coronary angiography based on clinical evaluation, with two undergoing percutaneous coronary intervention. Over a 32-year period with a median (range) follow-up of 5.15 (0.1, 31.82) years, MACE incidence was 15%. Asymptomatic aircraft pilots have underlying cardiovascular risk factors but good overall functional capacity, long-term outcomes and life expectancy. Prevalence of cardiac structural findings like aortic dilatation warrants increased attention during examination of these patients.