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Introduction: improving the technique of radiofrequency denervation of renal arteries seems to be extremely important for optimizing the effectiveness of lowering blood pressure in patients with resistant arterial hypertension. Our study presents an assessment of the comparison of long-term results of renal artery denervation (RAD) using various techniques and instruments.

Aim: was to compare the use of various techniques for renal artery denervation and to evaluate longterm results in patients with resistant arterial hypertension using various radio frequency catheters.

Materials and methods: in a prospective study, three groups of patients (n = 58) aged 18-85 years with resistant systolic-diastolic arterial hypertension of 1-2 stages were studied: patients underwent denervation of renal arteries by various methods, against background of standardized antihypertensive therapy. In group I (n = 21), denervation was performed only in the proximal segment of the renal artery (before the first bifurcation). In group II (n = 19), ablation was performed both in proximal segment and in branches of the second and third order, as well as in the accessory renal arteries with a diameter of more than 3 mm. The third control group included 18 patients who received only standardized drug antihypertensive therapy.

Results: technical success of the operation was achieved in 100% of cases. According to the 24-hours ambulatory blood pressure monitoring (ABPM) data, the decrease in blood pressure (BP) in group I by the second year of observation was 6,7 mm Hg, p <0,05 for systolic BP (SBP) and ˗ 2,7 mm Hg, p> 0,05 for diastolic BP (DBP). In the second group, a greater decrease in mean SBP and DBP was recorded: ˗ 9,2 mm Hg, p <0,05 and ˗ 4,3 mm Hg, p <0,05, respectively. In the control group of drug treatment, the weakest antihypertensive effect of treatment was revealed. The average indicators of SBP and DBP decreased by - 4,9/1,9 mm Hg, p> 0,05.

Conclusion: results of the use of prolonged radiofrequency denervation of the main, segmental and accessory renal arteries with a large number of ablation points demonstrate a similar safety and greater efficacy in treatment of patients with resistant arterial hypertension, in comparison with denervation of only main trunk of renal artery.




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