Fulminant myocarditis is a rare inflammatory heart disease affecting relatively young adults. We describe a case of a 27-year-old male with acute onset severe heart failure. A rapid and accurate diagnostic approach suggested parvovirus B19 as the most probable cause for this fulminant viral myocarditis. Initial haemodynamic support, intensive immunosuppressive and antiviral therapy resulted in a complete recovery within 2 weeks. This case demonstrates the importance of a detailed diagnosis, allowing better classification of the underlying pathology and subsequent targeted treatment.