Coronary artery bypass grafting (CABG) – as a method of treating patients with coronary heart disease (CHD) today retains the position of the gold standard. Surgical treatment by CABG is generally based on optimizing the results of treatment of patients with coronary heart disease, which in the modern world can be achieved by minimizing the traumatism of this operation. Taking into account the increased risk of complications associated with artificial blood circulation (IC), sternotomy and aortic manipulations, CABG requires the development of new and new maximally low-traumatic surgical techniques. 279 patients with coronary artery disease with complex multivessel lesions of the coronary bed were examined, who underwent elective CABG according to the OPCAB method. Depending on the BMI level, two groups were identified: 1gr. – 143 patients with a BMI < 30 kg/m2 and 2gr. – 136 patients with a BMI > 30 kg/m2, i.e. with the presence of obesity of varying severity.