[The influence of coronary artery bypass graft surgery on cerebral hemodynamics].

The influence of coronary artery bypass graft surgery (CABGS) on cerebral hemodynamics is still understudied. At the same time, ischemic heart disease (IHD) is often comorbid to atherosclerotic carotid artery stenosis, with significantly higher risk of post CABGS cerebrovascular complications in patients with cerebral hemodynamics lesion. Indices of cerebral hemodynamic reserve have been studied in 40 patients with severe IHD before and after CABGS. In most patients, there was a significant postoperative improvement of cerebral hemodynamics related to enhancing of blood flow along medial cerebral arteries and to amelioration of the parameters of cerebral hemodynamic reserve. But CABGS did not positively impact on cerebral hemodynamics in patients with initially reduced ejection fraction that appears to be a consequence of insufficient increase of stroke volume and in patients with a history of ischemic lesions of cerebral blood circulation. Therefore, the results obtained suggest a close relationship between coronal and cerebral blood circulation that should be taken into account in the analysis of pathogenetic mechanisms of cerebral blood circulation lesion in patients with IHD as well as in elaboration of adequate individual preventive treatment measures.