In people with type 2 diabetes, microalbuminuria is a strong, independent risk factor for diabetic nephropathy and cardiovascular morbidity and mortality. ACE inhibitor therapy decreased the risk of microalbuminuria in hypertensive subjects with type 2 diabetes and normoalbuminuria by about 40%. Available data suggest that angiotensin II receptor blockers (ARBs) might have a similar renoprotective effect and that this effect might be increased by combined ACE inhibitor therapy. The study will evaluate the effects, at similar blood pressure control (systolic/diastolic \<130/80 mmHg), for a period of three years, of dual renin-angiotensin-system (RAS) blockade by benazepril and valsartan combination therapy as compared to single RAS blockade by benazepril or valsartan alone on microalbuminuria and cardiovascular events in high-risk patients with type 2 diabetes, creatinine \<1.5 mg/dl, no evidence of microalbuminuria but at high risk of renal disease, with hypertension and a urinary albumin excretion between 7 and 19 microgram/min. The relationship between albuminuria and cardiovascular outcomes will also be evaluated. The study is expected to show a more effective prevention of microalbuminuria and cardiovascular events with combined than with single drug ACE inhibitor or ARB therapy. As compared to ACE inhibitor, ARB therapy is expected to have a similar effect on microalbuminuria, but an inferior cardioprotective effect. Applied to clinical practice, the findings should help preventing renal and cardiovascular complications, and related treatment costs, of type 2 diabetes.
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Development of persistent microalbuminuria (i.e. urinary albumin excretion rate >20 µg/min in at least 2 of 3 consecutive overnight urine collections confirmed in two consecutive visits). Whenever a patient will be found to have 2 of 3 collections in the
Timeframe: 2 times a year