Background and Aims Chronic kidney disease is associated with the accumulation of so-called medium molecules in the blood, in particular parathyroid hormone, and the formation of secondary hyperparathyroidism with a tendency to extra-bone calcification. The most vulnerable organ in relation to calcification is the vascular wall. The ail of the study to study the features of vascular wall remodeling in patients with chronic kidney disease who are being treated with programmed hemodialysis. Method The study included 86 patients with CKD C5 (mean age 47.44±5.04 years) who had been on programmed hemodialysis for at least 6 months. All patients underwent examination, including multislice spiral computed tomography (MSCT) with an assessment of the calcium content in the coronary arteries (Agatston index), ultrasound examination of the carotid arteries with determination of the thickness of the intima-media complex, the degree of endothelium-dependent vasodilation in a sample with 5-minute compression of the brachial artery and determination of changes in the diameter of the brachial artery. The data obtained (presented in the form of an arithmetic mean and its standard error) were compared with normal values typical for a healthy population. Results There was an accumulation of calcium in the coronary vessels with an average Agatstone index of 146.83 ± 13.26 units. Also, during MSCT, calcifications were found in the aortic wall in 86 out of 57 patients. The intima-media complex in patients with CKD was significantly increased and averaged 1.21±0.06mm. The degree of endothelium-dependent vasodilation in patients with CKD was reduced and amounted to 5.48± 0.03% of the initial diameter of the brachial artery. Correlation analysis revealed significant positive associations of average strength between the value of the Agatson index, the thickness of the intima-media complex of the carotid arteries and the concentration of parathyroid hormone in peripheral blood (g = +0.58,P<0.05 with the Agatson index and P = 0.42, P<0.05 with the thickness of the intima-media complex), as well as a significant negative relationship between the product of the concentration of calcium and phosphorus in peripheral blood and the degree of endothelium-dependent vasodilation (g = -0.49, P<0.05). Conclusion In patients with CKD, against the background of programmed hemodialysis, there is a remodeling of the heart with an increase in the size of the heart cavities and LV myocardial mass, a violation of regional and general LV contractile function, LV diastolic dysfunction and an increase in pressure in the pulmonary artery system. The introduction of sevelamer hydrochloride into the therapy regimen is associated with the prevention of the progression of cardiac remodeling. Calcification of the aortic valve progresses, regardless of the therapy used. Vascular remodeling in patients with CKD on the background of programmed hemodialysis is manifested by an increase in the thickness of the intima-media complex of the carotid arteries and a violation of endothelium-dependent vasodilation in favor of paradoxical vasoconstriction. Against the background of calcium carbonate therapy, structural disorders of the vascular wall progress. The introduction of sevelamer phosphate binder into the therapy regimen allows to prevent the progression and improve the functional state of endothelial function.
Background and Aims In a normal physiological state, there are many regulatory molecules that act as inhibitors of mineral formation to prevent the spread of tissue hardening. In patients with CKD, the levels or functions of these inhibitors may be abnormal, which in turn may predispose to or enhance ectopic calcification. to increase the effectiveness of early diagnosis of demineralization of the bone skeleton in patients with stage V chronic kidney disease receiving hemodialysis. Method The study included 94 CKD patients receiving hemodialysis for 15 months. The average age of the patients was 42.13±12.16 years. Etiologically, the cohort of patients included in the study was diverse, with a significant predominance of chronic glomerulonephritis as the cause of CKD in 72 patients, chronic pyelonephritis in 22 patients occupied the second place among the causes of CKD, the remaining causes occurred with a single frequency. Anemia was diagnosed in 71 patients. The observation lasted 12 months. Pathological changes in phosphorus-calcium metabolism and secondary hyperparathyroidism in patients were associated with a significant decrease in bone mineral density, it was shown both for the bodies of the lumbar vertebrae and for the femoral neck, the significance of the difference from the control group for absolute values of mineral density and relative deviation. Results In dynamics for 6 months in the general cohort of patients, there was a significant increase in the absolute mineral density of the femoral neck by 11.38%, p<0.01 the reliability of the difference with the baseline data, and a decrease in the degree of deviation of the mineral density index from the age norm -3.13%, p<0.05 for the bodies of the lumbar vertebrae and -4.01%, p<0.01 for the femoral neck, which confirms the effectiveness of osteoporosis therapy. In the present study, in 45 patients 37.5% at the time of inclusion in the study in the bodies of the lumbar vertebrae, the T-index was higher than -2.5 SD, in respect of the femoral neck – in all patients, the T was lower than 2.5 ST. The study of bone mineral density in patients with HCBP, the decrease of which reflects the syndrome of renal osteodystrophy, developing in response to secondary hyperparathyroidism, against the background of osteoporosis therapy. Conclusion In patients with CKD, against the background of programmed hemodialysis, there is a decrease in bone mineral density (1.93 times the bodies of the lumbar vertebrae and 2.83 times the femoral neck). The use of calcium carbonate, biphosphonate and vitamin D3 contributes to an increase in the mineral density of the femoral neck by 8.64% (p<0.05). The introduction of sevelamer hydrochloride into the therapy regimen increases the effectiveness of therapy and increases the mineral density of the bodies of the lumbar vertebrae by 5.96% (p< 0.05) and the femoral neck by 14.04% (p<0.05).
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