Abbreviations, acronyms & symbols
AVR	= Aortic valve replacement		MVR	= Mitral valve replacement
AVR+CABG	= Aortic valve replacement + Coronary artery bypass grafting		MVR+CABG	= Mitral valve replacement + Coronary artery bypass grafting
AVR+MVRr	= Aortic valve replacement + Mitral valve replacement or repair		MVRr+TVr	= Mitral valve replacement or repair + Tricuspid valve repair
BSCVS	= Brazilian Society of Cardiovascular Surgery		NYHA	= New York Heart Association
BYPASS Registry	= Brazilian Registry of Cardiovascular Surgery in Adults		RVD	= Rheumatic valve disease
CABG	= Coronary artery bypass grafting		SAVR	= Surgical aortic valve replacement
COPD	= Chronic obstructive pulmonary disease		SD	= Standard deviation
DATASUS	= Departamento de Informática do SUS (the Brazilian Health Informatics Department)		STS	= Society of Thoracic Surgeons
EACTS	= European Association of Cardiothoracic Surgery		SUS	= Sistema Único de Saúde (the Brazilian National Health System)
EuroSCORE	= European System for Cardiac Operative Risk Evaluation		TAVR	= Transcatheter aortic valve replacement
ICU	= Intensive care unit		TVr	= Tricuspid valve repair
LVEF	= Left ventricular ejection fraction		VHD	= Valve heart diseases
MVr	= Mitral valve repair		VHS	= Valve heart surgery
MVr+CABG	= Mitral valve repair + Coronary artery bypass grafting