We report the case of a 28-year old asthmatic female patient, who developed an acute heart failure beginning with diarrhea, fever, and dyspnea 5 weeks after delivery. After improvement of all vital functions and dismissal from hospital care unit a marked blood hypereosinophilia, left ventricular congestive heart failure, pericardium effusion and fever up to 40 degrees C followed. Endomycardial, bone marrow and skeletal muscle biopsies and the pericardial fluid showed a marked eosinophilic infiltration or polymyositis, respectively, which could be treated successfully with steroids and azathioprin. During steroid medication cytomegalovirus-associated myocarditis developed and was diagnosed by in situ hybridization. CMV hyperimmunoglobulin treatment (Cytotect, Biotest) was started (2 ml/kg bw on day 1 and 3, and 1 ml/kg on days 5, 7 and 9), which led to the eradication of the residual infiltrate and CMV-DNA in the myocardium. After discontinuation of all medication, eosinophilia and asthma recurred so that immunosuppressive treatment was continued.
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