GSTM1 and myocardial infarction: *—Pearson’s xi-square test; **—Fisher’s exact test; FC—functional class; LV EF—left ventricular ejection fraction; EDV—end-diastolic volume; MI—myocardial infarction; AH—arterial hypertension, XCL—cross-clamping; RBCM—red blood cell mass; Hb—hemoglobin; CPB—cardiopulmonary bypass