Two patients with hepatitis B virus infection and myocarditis are reported. The implicated pathogenesis was an immune complex mechanism in one pa tient. Both patients presented with heart failure and arrythmia which were con trolled with conventional medical therapy. Echocardiography played an important role for early detection of left ventricular dysfunction. The efficacy and safety of corticosteroid therapy is still conjectural. Acute hepatitis B infec tion should be a differential diagnostic consideration in the etiology of acute myocarditis.
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