The Reitman-Frankel transaminase method is a useful procedure in the evaluation of suspected myocardial infarction. Analysis of data from patients with myocardial infarction admitted to a 500 bed general hospital over a 5 year period revealed that the colorimetric procedure provided a 94% correlation with myocardial infarction established by clinical and electrocardiographic criteria. There was complete correlation in fatal cases where diagnosis of myocardial infarction was established by autopsy. The diagnostic usefulness of the colorimetric procedure would not have been improved significantly in this series by establishing a more narrow range of normal.

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