Demographic data.

Patient demographic data is shown. Diagnoses in this table were part of the patients’ known history before study data was obtained. Structural diagnoses included: Coarctation of the aorta, cardiomyopathy, single ventricle physiology, multisystem inflammatory syndrome in children (MIS-C) and coronary artery anomaly, orthotopic heart transplant (OHT), pulmonary hypertension, rhabdomyoma, tetralogy of Fallot (TOF), ventricular septal defect (VSD), atrial septal defect (ASD), patent ductus arteriosus (PDA), or atrioventricular (AV) canal defect. Electrical diagnoses included: Supraventricular arrhythmias, AV block, catecholamine polymorphic ventricular tachycardia (CPVT), long QT syndrome, or premature atrial/ventricular conductions. Concomitant structural and electrical diagnoses included: Double outlet right ventricle and SVT, MIS-C + coronary artery anomaly and AV block, OHT and atrial flutter, TOF s/p pacemaker, cardiomyopathy s/p pacemaker, congenitally corrected transposition of the great arteries s/p pacemaker, and TOF and Wolff-Parkinson-White.