Antihypertensive therapy with ketanserin: effects on central and renal hemodynamics, and microalbuminuria.

Ten patients with essential hypertension and normal renal function were treated with ketanserin (20-40 mg twice a day), administered for 8 weeks. In all patients, the changes in systemic and renal hemodynamics, and in urine albumin excretion, were assessed. Ketanserin monotherapy effectively lowered blood pressure in all patients. No change in cardiac output, pulse rate and stroke volume was observed; peripheral vascular resistance was significantly decreased. Plasma volume was unaltered. Renal plasma flow, glomerular filtration rate and filtration fraction were stable, with a slight but not significant reduction in renal vascular resistance. Urine albumin excretion remained unchanged. No relevant side effects were observed during the treatment period. In conclusion, our results confirm that ketanserin alone is an effective antihypertensive agent in patients with uncomplicated essential hypertension. The blood pressure lowering effect is mainly due to the systemic vasodilatation; renal hemodynamics and function are well preserved.