Objective. Evaluation of the immediate clinical results of endovascular correction of renal artery stenosis (ECRAS).
Material and methods. The immediate results of ECRAS were analyzed in 121 patients who underwent 147 interventions. All patients had arterial hypertension (AH), which was diagnosed in accordance with WHO recommendations (1999), and chronic kidney disease (CKD). CKD stage was assessed by glomerular filtration rate using the CKD-EPI formula. A period of 30 days was chosen as the immediate postoperative period. The results of ECRAS were evaluated at 3 and 30 days after the intervention. Efficiency of stent functioning or renal artery patency after angioplasty was analyzed, and serum creatinine (Cr) and blood pressure (BP) levels were compared before and after ECRAS. Assessment of the functional state (patency) of the stent after the intervention was carried out by ultrasound dopplerography.
Results. 3 and 30 days after the intervention, deaths and postoperative complications were not recorded. All ECRAS procedures were effective. The average Cr level in the study group significantly decreased by 7.48 μmol/L after 3 days and by 10.84 μmol/L 30 days after ECRAS (Wilcoxon test; p<0.001), as well as by 3.08 μmol/L after 30 days compared with the result on day 3 after ECRAS (Wilcoxon test; p<0.001). Blood pressure level statistically significantly decreased after ECRAS (Wilcoxon test; p<0.001; sign test; p<0.001).
Conclusion. ECRAS is a safe intervention for the life of patients in the immediate postoperative period. The ECRAS method is highly effective in restoring and maintaining renal artery patency. The clinical efficacy of ECRAS consists both in maintaining and improving renal function, and in correcting the severity of hypertension.

Keywords: renal artery, stenosis, atherosclerosis, stenting, angioplasty