Definitions
Definitions of the preoperative variables align with the notes about EuroSCORE II. Postoperative outcomes were recorded according to the VARC-2 criteria. Surgical indications were based on recommendations of the most recent guidelines (ACC/AHA, ESC/EACTS).
Definition of tricuspid valve regurgitation severity was based on the absolute size of the regurgitation jet by colour flow imaging, the relative size of the regurgitation jet ( relative to the right atrium area ), and the hepatic venous flow pattern, as recommended by the guidelines of the American Society of Echocardiography.
Perioperative MI has been evaluated according to the universal definition of myocardial infarction [7].