Table 2.

Variables required for current risk scores

	STS score	EUROSCORE additive/logistic*	Ambler Score
Patient characteristics
Age	+	+	+
Gender	+	+	+
Height	+
Weight	+
Body mass index			+
Ethnicity	+
Comorbid conditions
Diabetes	+
Hypertension	+		+
Chronic lung/pulmonary disease	+	+
Extracardiac arteriopathy	+	+
Peripheral vascular disease	+
Neurological dysfunction	+	+
Cerebrovascular accident	+
Serum creatinine	+	+	+
Dialysis-dependent renal failure	+		+
Immunosuppressive therapy	+
Cardiac history
NYHA classification	+
Unstable angina	+	+
Recent myocardial infarction	+	+
Arrhythmias	+		+
Previous cardiac surgery		+	+
Previous CABG	+
Previous valvular surgery	+
Previous PCI	+
Active endocarditis	+	+
Number of diseased coronary vessels	+
Type and severity of valvular disease (stenosis/regurgitation, aortic/mitral)	+
Haemodynamic state
Systolic pulmonary pressure > 60 mmHg		+
Ejection fraction	+	+	+
Critical pre-operative state		+
Cardiogenic shock	+
Resuscitation	+
Inotropic agents	+
Intra-aortic balloon pump	+
Procedure	+		+
Emergency	+	+
Surgery on thoracic aorta	+	+
Aortic valve surgerya	+		+
Mitral valve surgerya	+		+
Aortic and mitral valve surgerya	+		+
Tricuspid surgerya	+
Surgery for congenital heart disease	+
Rhythmologic surgery	+
Concomitant CABG	+		+
Concomitant tricuspid valve surgery	+		+
Post-infarct septal rupture		+

*The same variables are used for the additive and logistic EuroSCORE.

STS, The Society of Thoracic Surgeons; CABG, coronary artery bypass grafting; NYHA, New York Heart Association; PCI, percutaneous coronary intervention.

^aIn the STS score, the type of valvular surgery (valve replacement or repair) is taken into account.