There were differences in age, weight, height, incidence of preoperative pulmonary hypertension, preoperative digoxin administration, operation time, CPB time, intraoperative blood loss, transfusion amount, preoperative and POD1 hemoglobin, preoperative serum albumin levels, POD2 CRP levels, and the increase in hemoglobin concentration on POD1 from preoperative values (Table 1). This evidence concerns the gene CRP and pulmonary hypertension.