Management tailored to severity of disease
Maintain euvolemia, consider furosemide as needed
If cardiac function significantly depressed, consider epinephrine or dopamine
Consider afterload reduction with nitroprusside if normotensive
Treat arrhythmias
Unstable - cardioversion at 0.5-1 J/kg (max 2J/kg)
Stable - consider lidocaine or amiodarone
Avoid digoxin due to risk of precipitating more significant dysrhythmias in irritable myocardium
Admit to Pediatric ICU, preferably with ECMO capabilities
Unstable - cardioversion at 0.5-1 J/kg (max 2J/kg)
Stable - consider lidocaine or amiodarone
Avoid digoxin due to risk of precipitating more significant dysrhythmias in irritable myocardium
Myocarditis 
Airway obstruction
Endocarditis
Anaphylaxis
Constrictive pericarditis
Angioedema
Pericarditis
Aspirated foreign body