[Comparative Clinical Biochemical Assesment of the State of Mycardium After Coronary Artery Bypass Surgery Performed Using Various Techniques].

We compared parameters of the state of myocardium after coronary artery bypass surgery (CABS) performed according to the following techniques--with complete cardiopulmonary bypass (CABS-CBP), beating heart bypass grafting with parallel normothermic perfusion (CABS- BH-NP), and beating heart bypass grafting (CABS-BH). Patients (n = 100, 86% men, 14% women, age 56-69 years) were divided into 3 groups with comparable sex, age, state of the myocardium, and EUROSCORE surgical risk. In group 1 patients (n = 35) we used CABS-CHB, in group 2 (n = 32)--CABS-BH-NP, in group 3 (n = 33)--CABS-BH. The following parameters were obtained on day 1 after surgery: left ventricular ejection fraction (EF, echocardiography), blood plasma levels of creatine phosphokinase (CPK), CPK-MB, and cardiac troponin I (TnI). There was no significant difference in parameters studied between groups 1 and 2 with a tendency to their more pronounced positive dynamics in group 2. In group 3 compared with groups 1 and 2 we observed significant lowering of levels of CPK (by 21.2-30.9%, p < 0.05), CPK-MB (by 9.1-13.1%, p <0.05), Tnl (by 0.6-0.7%, p < 0.05), and elevation of EF (by 9.8-11.6%, p < 0.05). Rate of development of myocardial infarction in group 3 (6.8%) was lower than in groups 1 and 2 (14.2 and 9.8%, respectively). In all groups we observed close correlation between biochemical parameters and left ventricular EF (r = 0.74-0.82, p < 0.01).