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Updated: Aug 11, 2026

A Sensitive and Specific Quantitation Method for Determination of Serum Cardiac Myosin Binding Protein-C by Electrochemiluminescence Immunoassay
Published on: August 8, 2013
[Macrocreatine kinase, a cause of MB isoenzyme levels falsely elevated]
X Raga1, M A Vilanova, A Bardaji
1Laboratoire d'analyses cliniques, hôpital de Sant Pau i Santa Tecla, Tarragona, Espagne.
Abstract:
The authors describe two cases of falsely elevated CPK-MB levels due to the presence of a Macro-CPK. The quantification of the mass of CPK-MB gave values lower than the cut-off level. Electrophoresis of CPK isoenzymes showed a type 1 Macro-CPK in one case and a type 2 Macro-CPK in the other. The authors recommend electrophoresis of CPK isoenzymes or quantification of mass if the clinical evolution or ECG changes do not correlate with the CPK-MB levels or if there is a low global CPK with high CPK-MB levels.
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