Risks of complications in coronary artery bypass grafting when using effective pulmonary ventilation

Objective. The study was to evaluate the risk of cardio-respiratory complications in patients with coronary heart disease (CHD) who received coronary artery bypass grafting (CABG) with regard to the efficiency of pulmonary ventilation. Methods. Our study included 144 CHD patients. Body plethysmography and spiroergometry at rest were used to study the respiratory function and consumption of O 2. To evaluate the effectiveness of pulmonary ventilation, the coefficient of oxygen utilization (O 2CU) was then calculated. The first group consisted of 93 patients with O 2CU more than 25 ml /L, the second group included 51 patients with O 2CU less than 25 ml / L. Results. In the second group we registered more pronounced impairment of respiratory biomechanics toward the obstructive component, as compared to the first group. Also, in the second group there was a higher percentage of patients with concomitant chronic obstructive pulmonary disease (COPD), type 2 diabetes mellitus (DM) and multifocal atherosclerosis in comparison with the first group (p2CU less than 20 ml/l) increases the risks of developing RF and prolonged MV after CABG by 2.9 and 2.2 times respectively. Prolonged MV after CABG leads to a 1.9-fold increase in AF development.