Table 2.

Baseline operative characteristics (n=724)

Primary procedure*
Ventricular septal defect closure	64 (9%)
Tetralogy of Fallot	53 (7%)
Bidirectional Glenn	51 (7%)
Coarctectomy	47 (7%)
Fontan	43 (6%)
Stage 1 (Norwood) palliation	43 (6%)
Systemic to pulmonary artery shunt	41 (6%)
Atrioventricular canal repair	40 (6%)
Secundum atrial septal defect closure	29 (4%)
Arterial switch	26 (4%)
Primum atrial septal defect closure	25 (4%)
Truncus arteriosus repair	8 (1%)
Total anomalous pulmonary venous return repair	7 (1%)
Risk Adjusted classification for Congenital Heart Surgery (RACHS-1) classification
1	66 (9%)
2	287 (39%)
3	242 (33%)
4	33 (5%)
6	48 (7%)
Unable to classify	48 (7%)
Cardiopulmonary bypass time (min)	102 (0–731)
Cross clamp (min)	36 (0–217)

^*Includes all primary operative procedure frequencies ≥ 5%.