Table 1.

Patient Demographic Data

Characteristic	No. (%) or median (interquartile range)
Male sex	53 (62)
Age, m	0.3 [0.04–3.20]
Weight, kg	4.9 [3.2–20.10]
Height, cm	56 [49–95]
Arrythmia diagnosis
Supraventricular tachycardia	79 (93)
Hemodynamically significant premature atrial contractions	2 (2)
Ventricular tachycardia/fibrillation	4 (5)
Cardiac function (qualitative)
Normal‐mildly decreased	56 (72)
Moderately decreased	15 (19)
Severely decreased	7 (9)
Congenital heart disease	45 (53)
Ebstein's anomaly	3
Atrioventricular canal defect	4
Atrial septal defect	2
VSD	3
Coarctation of the aorta	1
Cardiomyopathy ( including dilated, restrictive, and hypertrophic)	8
Single ventricle anatomy (double inlet left ventricle, double outlet right ventricle, hypoplastic left heart syndrome, heterotaxia syndrome)	11
D‐ Transposition of the great arteries	2
L‐ Transposition of the great arteries	1
Aortic stenosis	3
Tetralogy of Fallot, pulmonary stenosis	2
Pulmonary atresia, VSD‐MAPCA	2
Mitral stenosis, congenital	2
Cardiac, other	1
Adults with congenital heart disease	4 (5)
Congenital mitral valve stenosis	1
Ebstein’s anomaly	1
Congenital aortic valve stenosis	1
Pulmonary atresia, VSD‐MAPCA	1

MAPCA indicates major aortopulmonary collateral arteries; and VSD, ventricular septal defect.