**4. Cardiac function**

Thus, in the study group patients left ventricular end-diastolic volume index (LV EDVI) was increased on average up to 118 ml/m2 , end-systolic volume index (LV ESVI) – up to 74 ml/m2 , LV ejection fraction (EF) was lowered to 38% and in the control group patients these parameters were: LV EDVI - 114 ml/m2 , LV ESVI – 69 ml/m2 , EF - 40%. MRI of diastolic phase in synchronizing mode showed perimeters of affected myocardium; on average they were 52% and 49% of the entire myocardial perimeter in the groups.

EchoCG performed in 2 weeks after the surgical intervention showed statistically signifi‐ cant (p<0,01) change of the values in comparison with preoperative data: increased EF up to 49% и 52%, decreased EDVI down to 79 and 77 ml/m<sup>2</sup> , ESVI to 49 and 48 ml/m2 in the patients of the study group and control group correspondingly. There were no statis‐ tically significant differences found between the groups as for preoperative and postoper‐ ative hemodynamic values.
