Abstract
Angiotensin-converting enzyme (ACE) inhibitors have a well-established role in the management of patients with hypertension, diabetes, heart failure and myocardial infarction (MI). ACE inhibitors have been particularly well studied in acute and chronic MI with consistent and substantial survival benefits demonstrated, particularly in the higher risk groups. The recent development of angiotensin II (Ang II) receptor blockers (ARBs) as a well tolerated pharmacological therapy to more completely inhibit the actions of Ang II at the AT1-receptor level raises questions concerning comparative efficacy with the proven ACE inhibitor experience. Two major trials will provide a direct comparison of ARBs with an ACE inhibitor. The Valsartan in Acute Myocardial Infarction (VALIANT) trial is specifically designed to compare and contrast the ARB, valsartan, used both alone as well as in combination with a proven ACE inhibitor regimen, in a high risk MI population. VALIANT, with its three arms targetting 14,500 patients, is uniquely poised to determine whether the pharmacological advance in the development of ARBs confers additional clinical (survival) value in high risk MI patients.
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