GSTM1 and heart failure: Patients who exhibited a composite of morbidity endpoints had a higher incidence of preoperative CKD, higher incidence of heart failure, higher EuroSCORE, lower LVEF, lower Hb and albumin levels, higher Cr levels, longer CPB time, higher incidences of intraoperative pRBCs transfusion, and milrinone and vasopressin requirements compared to those without morbidities (Table 1 and Table 2).