[Myosin: a necrosis marker: update and trends].

: Plasma myosin heavy chain fragments are a "quantitative indicator of myocardial necrosis" in patients with myocardial infarction. Myosin assay enables: retrospective diagnosis of necrosis; assessment of infarct size; evaluation of the scarring process and risk of recurrence; analysis of methods of cardioplegia in cardiac surgery by detection of perioperative infarction; determination of the long-term prognosis of post-infarct patients.