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The variation of capillary filtration rate (CFR) and ankle edema (AE) were evaluated in three groups of patients with venous hypertension with ambulatory venous pressure &gt; 42 mmHg and in healthy subjects before and after treatment for four weeks with HR (Paroven, Venoruton; 0-(P-hydroxyethyl)-rutosides), a venoactive drug acting on the microcirculation and on capillary permeability. Group A (30 patients) was treated with HR 500 mg tid; group B (30 patients) was treated with 1 g tid; group C (30 patients) was treated with placebo; group D (10 healthy subjects) was treated with HR 1 g/day in a randomised study. CFR was assessed by venous occlusion plethysmography. Subjective symptoms of venous hypertension were assessed by an analogue scale line considering four symptoms: swelling sensation, restless lower extremity, pain and cramps, and tiredness.    Results: There were no significant differences for sex and age distribution among the groups; no significant differences were found for ambulatory venous pressure and refilling time and parameters of venous hypertension among groups. There was a significant difference between normal subjects and patients. There were no drop-outs and observed intolerance. In group A, there was a significant decrease of CFR (P &lt; 0.01) after treatment. In group B (2 g/day), the decrease was greater than that in group A (P &lt; 0.05). In group C (placebo) there was no significant difference before or after treatment. The variations in analogue score was higher with the higher dosage. The score of group A fell from 7.8 (SD 1.3) to 4 (1). Group B's score fell from 7.9 (2) to 3.1 (1.2). In group C (placebo) there was no change. The decrease in the score in the groups of patients was correlated with the variation in edema and CFR.    Conclusion: HR is effective in venous edema and hypertension. Its effects are dose-related.

journal of cardiovascular pharmacology and therapeutics

Treatment of Edema and Increased Capillary Filtration in Venous Hypertension with HR (Paroven, Venoruton; 0-(β-hydroxyethyl)-rutosides): A Clinical, Prospective, Placebo-Controlled, Randomized, Dose-Ranging Trial