Acute necrotising eosinophilic myocarditis.

Löffler's endocarditis is a recognised complication of diseases associated with eosinophilia. Eosinophilic heart disease is usually chronic, but there is a rare acute variety. Three patients with an unusual form of eosinophilic heart disease characterised by acute necrotising eosinophilic myocarditis after a possible initial viral infection and underlying allergic diathesis are reported. In contrast to previously reported cases of acute Löffler's endocarditis there was no notable extracardiac pathology.