Table 1.

The International Pediatric Congenital Cardiac Code classifies adverse events into severity levels.

	Risk Category 1	Risk Category 2	Risk Category 3	Risk Category 4
Diagnostic Case	Age ≥ 1 month < 1 year	Age ≥ 1 month < 1 year	Age < 1 month
Valvuloplasty		Pulmonary valve ≥ 1 month	Aortic valve ≥ 1 month	Mitral valve
			Pulmonary valve < 1 month	Aortic valve < 1 month
			Tricuspid valve
Device or coil closure	Venous	PDA	Systemic surgical shunt	VSD
	collateral	ASD or PFO	Baffle leak	Perivalvar leak
	LSVC	Fontan fenestration	Coronary fistula
		Systemic to pulmonary artery collaterals
Balloon angioplasty		RVOT	Pulmonary artery < 4 vessels	Pulmonary artery ≥ 24 weeks
		Aorta dilation < 8 ATM	Pulmonary artery ≥ 4 vessels all < 8 ATM	Pulmonary vein
			Aorta > 8 ATM or CB
			Systemic artery (not aorta)
			Systemic surgical shunt
			Systemic to pulmonary collaterals
			Systemic vein
Stent placement		Systemic vein	RVOT	Ventricular septum
			Aorta	Pulmonary artery
			Systemic artery (not aorta)	Pulmonary vein
				Systemic surgical shunt
				Systemic pulmonary Collateral
Stent redilation		RVOT	Pulmonary artery	Ventricular septum
		Atrial septum	Pulmonary vein
		Aorta
		Systemic artery (not aorta)
		Systemic vein
Other	Myocardial	Snare foreign body	Atrial septostomy	Atrial septum dilation and stent
	biopsy	Transseptal puncture	Recanalization of jailed vessel in stent	Any catheterization < 4 days after surgery
			Recanalization of occluded vessel
				Atretic valve performation

RVOT indicates right ventricular outflow tract; RV, right ventricle; PA, pulmonary artery; RVOT includes RV-to-PA conduit or status after RVOT surgery with no conduit; LSVC, left superior vena cava; ATM, atmospheres; CM, cutting balloon; PDA, patent ductus arteriosus; ASD, atrial septal defect; PFO, patent foramen ovale; and VSD, ventricular septal defect.