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Transfusions and early outcomes in anaemic patients undergoing off- or on-pump coronary artery bypass grafting.

We retrospectively compared transfusion rates and early outcomes in 1621 consecutive patients with preoperative anaemia undergoing off-pump coronary artery bypass grafting (OPCAB) or on-pump coronary artery bypass grafting (ONCAB) surgery using a propensity score analysis with inverse probability of treatment weighting. Endpoints were transfusions, early morbidity, and mortality. Surgeries were performed by 45 dedicated OPCAB and/or ONCAB surgeons during the 10-year study period. Operative data did not differ significantly between study groups with the exception of a more frequent use of bilateral internal mammary artery revascularization approach in OPCAB patients than ONCAB patients. OPCAB was associated with fewer transfusions and lower risk for the need of postoperative renal replacement therapy, but higher risk of wound infections than ONCAB. Perioperative stroke risk and 30-day and 1-year mortality did not differ significantly between the groups. Our data in a 'real-world setting' indicate that in patients with preoperative anaemia both ONCAB and OPCAB are feasible surgical approaches regarding early morbidity and mortality.

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