Does Preoperative Anemia Predict Adverse Outcomes after Cardiac Surgery?

Objective Preoperative anemia is now emerging as a potential risk factor after cardiac pulmonary bypass. The aim of this study is to evaluate whether anemia has been associated with worse outcomes following open heart surgery. Methods In this retrospective study, 1836 adult patients who underwent open heart surgery between Januuary 1994 and December 2012. Among them 475 (25.8 %) have preoperative anemia defined as per world health organization guidelines as hemoglobin (Hb)