Influence of reperfusion on serum concentrations of cytosolic creatine kinase and structural myosin light chains in acute myocardial infarction

The American Journal of Cardiology
H A KatusW Kübler

Abstract

The kinetics of cytosolic and structural marker protein release from myocardium were studied in 44 patients with acute myocardial infarction. After intracoronary infusion of streptokinase, there was early recanalization of the infarct-related artery in 8 patients and late recanalization in 18. In 18 patients the infarct-related artery remained occluded. Creatine kinase (CK) level peaked and normalized significantly earlier in patients with early reperfusion than in patients with late reperfusion, and in patients with late reperfusion earlier than in patients with permanent occlusion. Thus, the interval of absolute diagnostic sensitivity of CK depends on early infarct perfusion. In contrast, release of myosin light chains was not significantly changed by recanalization of the infarct-related artery compared with that in nonreperfused myocardial infarction. Thus, in patients with acute myocardial infarction, myosin light chains may be superior to CK as a diagnostic means and for estimation of infarct size.

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