Abbreviations, acronyms & symbols
AUC	= Area under the receiver operating characteristic curve
CABG	= Coronary artery bypass grafting
CCS	= Canadian Cardiovascular Society
EF	= Ejection factor
EuroSCORE	= European System for Cardiac Operative Risk Evaluation
NYHA	= New York Heart Association
RAMR	= Risk-adjusted mortality ratio
STS	= Society of Thoracic Surgeons