On the basis of the markers of myocardial necrosis in serum samples (TnI, CK, CK-MB, and myoglobin) and electrocardiography, according to the accepted standards, non-ST-elevation myocardial infarction was recognized in 30% of the patients, while ST elevation myocardial infarction in 70%. The gene discussed is MB; the disease is myocardial infarction.