Is serum creatine kinase:aspartate aminotransferase ratio useful for diagnosing acute myocardial infarction in elderly patients?

Abstract

have an AMI. The overlap, however, between these groups was large. Conclusions: These results did not allow discrimination to be made between myocardial and skeletal sources for increased CK activity. The CK:AST ratio is, therefore, of limited use when applied to the diagnosis of AMI in elderly patients. Clinical evaluation rather than the pattern of enzyme change is more likely to determine the cause of increased CK activity. (7 Clin Pathol 1993;46:264-266)