Oral and Intravenous Iron in Patients Postoperative Cardiovascular Surgery Under Extracorporeal Circulation

Inclusion Criteria: * Men and women ≥ 18 years of age * Patients subject to elective cardiac surgery under extracorporeal circulation * Patients without previous anaemia, susceptible of treatment * Patients without need of blood transfusion preoperative * Patients providing written informed consent * Patients who are able to complete all study visits per protocol Exclusion Criteria: * Patients subject to elective cardiac surgery, but without extracorporeal circulation * Patients who were treated with fibrinolytic therapy 48 hours before the surgery * Patients with history of impaired renal function, (e.g., calculated creatinine clearance \<50 mL/min/1.73 m2) * Patients operated of active endocarditis * Redo-surgery patients * Women who are pregnant or lactating * Patients with clinical of digestive bleeding * Patients with vitamin B12 deficit * Patients with ferropenic anaemia * Patients with clinical history of asthma or allergy * Patients with active infection * Patients who are included in another clinical study * Patients with hepatic disease * Patients with history of allergy to iron * Patients unlikely to adhere to protocol follow-up