Abstract
Microalbuminuria in patients with essential hypertension is associated with increased incidence of cardiovascular morbidity and mortality. Reduction of urinary albumin excretion (UAE) with therapy could reduce cardiovascular events. The long-term effect of commonly used antihypertensive agents on UAE has not been properly investigated. In the present study, we have prospectively studied the effects of therapy for 24 months with a converting enzyme inhibitor, enalapril, or a calcium channel blocker, nicardipine, on UAE in 40 patients with essential hypertension and microalbuminuria. Enalapril and nicardipine were equally effective in reducing arterial pressure. However, enalapril decreased UAE from 77.1 +/- 10.4 to 30.4 +/- 7.9 mg/24 h after 1 year, and to 24.7 +/- 4.8 (P < .01) after 2 years of therapy. UAE however, did not change in patients treated with nicardipine (from 65.2 +/- 12 to 73 +/- 14 after 1 year, and to 52.7 +/- 21 mg/24 h after 2 years of therapy). The impact of reducing UAE on overall cardiovascular morbidity and mortality and on future progression of renal failure in patients with essential hypertension remains to be established.
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