Fulminant myocarditis associated with novel H1N1 influenza A.

Myocarditis secondary to H1N1 influenza has been described in children, but only very rarely in adults. We describe a 36-year-old man with no significant medical history who presented with flu-like symptoms of 3-week duration. When he sought medical attention, he was already manifesting heart failure secondary to fulminant myocarditis, along with multiorgan failure. Despite aggressive management, including circulatory support with a catheter-based mechanical cardiac assist device (Impella 2.5 Cardiac Assist Device, Abiomed, Danvers, MA) as a bridge to cardiac transplant, and aggressive antiviral and antibacterial therapy, the patient died of cardiac arrest. An H1N1 polymerase chain reaction postmortem assay produced positive results, and a diagnosis of fulminant viral myocarditis and multiorgan system failure was established.