Abstract
Postmortem diagnosis of early myocardial infarctions is an ever recurrent problem in pathology. In the present study we determined the troponin I expression in 46 autopsy hearts using an immunohistochemical technique. Troponin I has, as a specific cardiac muscle protein, become a widespread used marker in testing patients with acute chest pain. The hearts were divided into three groups based on the macroscopical findings: definite signs of infarction, possible signs of infarction and no signs of infarction. All 14 cases of definite myocardial infarction showed a well-defined area with loss of troponin I. Twenty-three of 24 cases of possible myocardial infarction also showed a well-defined area with loss of troponin I. None of the eight non-cardiac death controls showed loss of troponin I expression. The results suggest troponin I expression as a sensitive test in diagnosis of early myocardial infarction
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