Predictive criteria of surgical curability of renovascular hypertension. Comparative assessment individually and in combination by discriminant analysis.

. The data available before a hypertensive patient undergoes surgical treatment for renovascular hypertension have been assessed as to their value in predicting the effect of the operation on the hypertension. The 43 patients studied were selected to exclude secondary complications and technically unsatisfactory surgical procedures. The data were assessed individually and also by discriminant analysis to determine the best combination of criteria for preoperative prediction of surgical results. The best individual criteria were (in order of decreasing importance): 1) increased urinary concentration of creatinine or inulin on the diseased side or increased plasma renin activity (PRA) in the suprarenal inferior vena cava; 2) hemadynamic delay beyond the arterial stenosis (renal arteriogram); 3) duration of hypertension; and 4) sum of criteria from excretory urogram. Combination of clinical and roentgenologic criteria provided correct prediction in 80 to 85% of the cases, which is about the accuracy provided by the best individual criteria.