[Macro creatine kinase as a pitfall in diagnosis of acute myocardial infarction]

Measurement of creatine kinase and the more heart-specific creatine kinase B has been a mainstay in the diagnosis of acute myocardial infarction in Denmark since the 1970's. However, an elevated creatine kinase B may reflect other conditions than myocardial damage, for example the presence of other isoenzymes or macro creatine kinase. A case is presented with a review of the literature.