Table 2.

Prenatal and postnatal clinical characteristics of patients receiving ASO

Characteristic	Overall (n = 118)
Pre-delivery
Prenatal diagnosis, n (%)
TGA/IVS	46 (39)
TGA/VSD or TBA	72 (61)
Other cardiac anomalies, n (%)
Arch abnormality	19 (16)
LVOTO	5 (4)
Parameters of prenatal Echo, median [IQR]
VSD/AO ratio	0.6 (0.0–0.9)
DA/AO ratio	0.6 (0.5–0.8)
FO/AO ratio	1.1 (0.9–1.5)
After delivery
Male, n (%)	105 (89)
Gestational age (weeks), median [IQR]	38.6 (37.1–39.3)
Term infant, n (%)	97 (82)
Weight < 2500g, n (%)	15 (13)
Blood-oxygen saturation (%)	75.0 (60.0–85.0)
PH in blood gas analysis, median [IQR]	7.31 (7.26–7.36)
Lactate in blood gas analysis (mmol/L), median [IQR]	2.5 (1.8–3.9)
Prostaglandin E1-dependent before surgery, n (%)	68 (58)
Parameters of Postnatal Echo
VSD/AO ratio, median [IQR]	0.0 (0.0–0.4)
Shunt flow volume of atrial septal (mm), median [IQR]	4.5 (2.7–6.1)
PDA/AO ratio, median [IQR]	0.5 (0.4–0.6)
Intraoperative variables
Emergency operation, n (%)	39 (33)
Age at ASO (d), median [IQR]	8.0 (4.8–11.0)
CPB time (min), median [IQR]	185.0 (158.5–219.0)
ACC time (min), median [IQR]	111.0 (93.0–126.0)
Surgical procedures, n (%)
VSD repair	41 (35)
Concomitant arch repair	7 (6)
Coronary artery anatomy, n (%)
Usual (1LCx-2R, 1L2RCx)	87 (74)
Other (non-usual)	31 (26)
Coronary anomaly, n (%)
Looping pattern	20 (17)
Intramural coronary artery	7 (6)
Coronaries from a single ostium	6 (5)

Abbreviations: ASO Arterial switch operation, TGA/IVS Transposition of the great arteries with intact ventricular septum, TGA/VSD Transposition of the great arteries with ventricular septal defect, TBA Taussig-Bing anomaly, LVOTO Left ventricular outflow tract obstruction, IQR Interquartile range, ECHO Echocardiography, VSD Ventricular septal defect, AO Aorta, DA Ductus arteriosus, FO Foramen ovale, PDA Patent ductus arteriosus, CPB Cardiopulmonary bypass, ACC Aortic cross-clamping, Cx Circumflex artery, L Left coronary artery, R Right coronary artery, 1 Sinus 1, 2 Sinus 2