Infections of cardiac mural thrombi are rare, and because antemortem diagnosis is difficult and antibiotic therapy alone ineffective, the associated mortality has been significant. A patient with gramnegative bacillary infection of a mural thrombus is described. Gallium 67 citrate isotope scanning and two-dimensional echocardiography were helpful adjuncts in establishing the diagnosis. Surgical resection of the infected myocardial tissue and prolonged antimicrobial therapy were necessary for cure.
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