Acute phase
Antiviral agents (Pleconaril/Ribavirin) may be effective
COVID-related: limited/conflicting evidence regarding efficacy of high-dose steroids and/or IVIG 
Subacute phase
Studies have not shown efficacy of immunosupressants
Pediatric patients may receive high-dose IVIG
Chronic phase
Treatment for CHF symptoms
Ventricular Assist Devices (VAD)
Cardiac transplant
Antiviral agents (Pleconaril/Ribavirin) may be effective
COVID-related: limited/conflicting evidence regarding efficacy of high-dose steroids and/or IVIG 
Studies have not shown efficacy of immunosupressants
Pediatric patients may receive high-dose IVIG
Treatment for CHF symptoms
Ventricular Assist Devices (VAD)
Cardiac transplant
Myocarditis
Consider other causes of CHF
Endocarditis
Acute coronary syndromes 
Constrictive pericarditis
STEMI
Pericarditis
Non-STEMI