[X-ray study of the collateral blood flow in vasorenal hypertension]

The radiological signs of collateral blood flow were studied in 254 patients with vasorenal hypertension, 142 of whom had atherosclerosis, 59 had fibrous dysplasia, and 53 had aortoarteritis. The collaterals were found to be more pronounced in the two forms of hypertension mentioned last (55.9 and 58.5%, respectively). The patients' age and the sharp degree of renal artery stenosis are the main factors determining the development of collaterals. The collateral blood flow prevents the development of ischemic atrophy of the kidney to a certain measure, but does not protect the patients from hypertension. The specific features of the collateral channels are revealed more fully by using various methods of renal vasography, which is important in assessment of the character of the pathological condition and the choice of the therapeutic tactics.