Preoperative creatinine values, demographic data, comorbidities will be recorded in ASA I-II elective coronary artery and valvular cardiac surgery patients. Intraoperative delta PCO2, lactate, ScVO2 will be recorded in several steps. The patients will be divided into four groups as Nonanemic-transfused, Nonanemic- Not transfused, Anemic- Not-transfused, Anemic-Transfused Groups observationally. The trend of delta CO2, lactate, ScVO2, postoperative creatinine values, postoperative complications and 28 days mortality will be compared.