Cerebral hemodynamics in patients with type 2 diabetes mellitus and chronic kidney disease

Abstract

Background. The main risk factors for cardiovascular diseases (CVD) are diabetes mellitus, anemia, microalbuminuria, proteinuria, azotemia, hyperlipidemia, obesity, smoking, lack of physical activity, and non-traditional factors are metabolic and hemodynamic disorders. The combined effect of diabetes mellitus and renal insufficiency increases the risk of CVD and confirms the worse survival prognosis of these patients compared to the general population. The study was aimed to study changes in the parameters of cerebral hemodynamics in patients with type 2 diabetes mellitus receiving programmed hemodialysis. Materials and me­thods. During the period from January 1, 2019 to June 1, 2021, 117 patients suffering from type 2 diabetes mellitus with chronic renal failure stage V on programmed hemodialysis were examined and observed. Of these, there were 58 women and 59 men. The average age of men was 67.0 ± 4.2 years, women — 64.0 ± 5.6 years. Twenty patients of the matched age formed the control group. The number of hemodialysis sessions in patients ranged from 2 to 162. All patients underwent examinations that included general clinical, biochemical, hormonal blood tests, Dopplerography of the main arteries of the head. Results. With the increasing degree of cerebral ischemia, the linear velocity of blood flow (LBFV) decreased in all the main arteries of the head: the common caro­tid artery, the internal carotid artery, the vertebral artery on both sides (p < 0.05). At the same time, the differences in the LBFV from healthy individuals were significant. The stenosis of the lumen of the main vessels of the head occurred mostly in patients of the third group with stage V diabetic nephropathy and grade III chronic cerebral ischemia, while they most often had multiple vascular stenosis. Conclusions. Dopplerography of the main arteries of the head is an informative method for determining the prognosis of cerebral ischemia in patients with type 2 diabetes mellitus and chronic kidney disease. Linear blood flow velocity was reduced in all groups of patients with type 2 diabetes mellitus and chronic kidney disease.