Hospitalizations for bicuspid aortic valve (BAV) were more commonly to be for elective aortic repair rather than acute aortic syndrome (AAS), and they were more likely to be younger with fewer comorbidities compared with their trileaflet aortic valve (TAV) counterparts.

During the study year there was no significant change in the number of hospitalizations for BAV, contrasting with a rising trend in hospitalizations for TAV in both the elective thoracic aortic aneurysm (TAA) repair and AAS cohorts.

Admissions with BAV undergoing elective TAA repair were associated with lower mortality, acute stroke, use of mechanical circulatory support device (MCS), and shorter length of hospital stay.

Admissions with BAV hospitalized for AAS had higher rates of bleeding events, cardiac tamponade, ventricular arrhythmias, and longer length of hospital stay.

Among admissions with BAV undergoing elective aortic repair, the predictors of lower mortality included large-sized hospitals and teaching hospitals, while predictors of higher mortality among admissions with AAS included history of heart failure, fluid/electrolytes abnormalities, chronic kidney disease (CKD), and coronary artery disease (CAD).