Arterial
hypertension is a significant cause of
end-stage renal failure; effective treatment of hypertensive patients reduces the rate of progression of this disorder. ss-Blockers, particularly nonselective agents, are associated with deterioration of renal function in patients with
chronic renal failure. Previous studies on the interaction of the beta1-selective
adrenergic antagonist bisoprolol with kidney function have been performed only acutely and over the short term. This study was designed to evaluate the
antihypertensive efficacy and effects on renal hemodynamics and function of
bisoprolol during medium-term (6 mo) treatment of patients with mild to moderate
essential hypertension. After a 2-wk run-in period on placebo, 87 consecutive hypertensive patients (46 men, 41 women) according to ESH-ESC (European Society of
Hypertension/European Society of Cardiology) guidelines, aged from 27 to 64 y (mean age, 50+/-11 y), without renal or
cardiovascular disease, were enrolled and assigned to treatment with
bisoprolol 5 mg once daily for 6 mo. At recruitment and at 6 mo
after treatment, renal function was assessed and renal hemodynamics evaluated in all patients through
radioisotope studies. The medium-term effects of
bisoprolol included a significant reduction in blood pressure and heart rate (P<.001) without significant
adverse drug reactions. Moreover,
bisoprolol produced no alteration in renal function or hemodynamics, or in cardiac output. Data presented here indicate that
bisoprolol 5 mg given once daily to treat patients with mild to moderate
essential hypertension is effective and safe for treatment and for preservation of renal performance when given on a medium-term basis.