MR-ANGIOGRAPHY IN ASSESSING THE ANATOMY OF THE RENAL ARTERIES BEFORE RENAL SYMPATHETIC DENERVATION
T he paper presents comparative analysis of preoperation MR-angiography and X-ray angiography carried out before renal denervation of sympathetic plexus of renal arteries in patients with resistant arterial hypertension. Purpose. To compare the data of MRA and diagnostic X-ray angiography of the renal arteries to determine a method that allows you to plan in detail the renal denervation procedure. Materials and methods. 44 patients (16 men, 28 women; average age was 59.18 years) with a verified diagnosis: resistant hypertension, admitted to treatment (renal denervation). All patients underwent standard preoperative laboratory and instrumental diagnostics. Survey aortography with selective renal angiography and MR angiography were performed in all 44 (100%) patients. Results and conclusion. It has been shown that both methods are comparable in the detection of renal arteries stenosis, as well as in visualization of the main renal artery and of segment branches of arteries, and in measurement of their diameters. In most cases MR-angiography a little bit exaggerates the diameter of the artery for as low as 0.6-0.8 mm. Also MR-angiography do not deliver radiation exposure to a patient. Moreover, MRA provides the opportunity of sequential thin-slice imaging, and may separate branches of the renal arteries up to segment branches of 3-4 classes with high accuracy. In total, the MRA predicts the anatomic imaging with invasive catheter X-ray angiography and allows to plan it in details before renal sympathetic denervation.