Table 1.

Surgical procedures performed in the study population

Surgical Procedure	Patients (n)	Aristotle Score
Ventricular septal defect closure	37	6
Arterial switch operation	34	10
Tetralogy of Fallot repair	27	8
Arterial switch operation and ventricular septal defect closure	20	11
Pulmonary atresia, palliation	14	7.5
Complete atrioventricular canal repair	11	9
Total anomalous pulmonary vein connection repair	8	9
Bidirectional Glenn anastomosis	7	7.5
Interrupted aortic arch repair	6	10.8
Truncus arteriosus repair	4	11
Other	32

The complexity of each cardiac condition is graded according to the Aristotle surgical complexity score (18), ranging between 1.5 and 15.