[Analysis of flowmetric parameters of blood flow through coronary bypass grafts in high-risk surgical patients]. / Analiz floumetricheskikh pokazatelei krovotoka koronarnykh shuntov u patsientov vysokogo khirurgicheskogo riska.

Coronary artery bypass grafting is a widely used cardiosurgical intervention which may be performed either on the arrested heart in conditions of artificial circulation or on the beating heart without artificial circulation. However, in a series of works, the results of bypass grafting using both techniques had no significant differences. In our article, we analyse the flowmetric parameters of blood flow through the coronary bypass grafts in high-surgical risk patients presenting with ischaemic heart disease and undergoing coronary artery bypass grafting in conditions of artificial circulation and on the beating heart. For this purpose, a total of 148 patients enrolled into the study were divided into 2 groups depending on the technique of surgical treatment. The obtained statistical data showed comparable results in the both groups, however, operative interventions on the beating heart made it possible to significantly decrease the risk of the development of the majority of complications.

[Evaluation of cerebral hemodynamics in patients with syndrome of obstructive sleep apnea by long term registration of rheoencephalogram]. / Otsenka mozgovoi gemodinamiki u patsientov s sindromom obstruktivnogo apnoé sna metodom dlitel'noi registratsii reoéntsefalogrammy vo sne.

AIM: To assess cerebral hemodynamics during sleep in patients with syndrome of obstructive sleep apnea. METHODS: Long term monitoring of rheoencephalogram. Data processing consisted in construction of trends (curves of changes of rheographical parameters during any selected time interval). RESULTS AND CONCLUSION: Cyclical periods of apnea are associated with negative changes of cerebral hemodynamics. At the end of period of apnea despite compensatory vasodilatation cerebral blood flow decreases. This occurs during pronounced hypoxemia and can predispose to ischemic disturbances. In ventilation phase rapid rise of heart rate and blood pressure at the background of continuing cerebral vasodilatation can increase risk of hemorrhagic complications.