Rationale for the Use of Combination Angiotensin-Converting Enzyme Inhibitor and Angiotensin II Receptor Blocker Therapy in Heart Failure

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Abstract
Background The present multicenter study investigated whether the combination of angiotensin-converting enzyme inhibitor (ACEI) and angiotensin II receptor blocker (ARB) is more beneficial for preventing left ventricular remodeling and suppressing neurohumoral factors than either ACEI or ARB alone. Methods and Results One hundred and six patients with mild-to-moderate congestive heart failure treated in 26 Japanese institutes were randomly assigned to the combination therapy or monotherapy. Changes in physical activity (New York Heart Association functional classes, Specific Activity Scale (SAS)), concentrations of neurohumoral factors (plasma renin activity, angiotensin II, aldosterone, and brain natriuretic peptide (BNP)), and cardiac function for 6 months were compared between the 2 groups. It was found that the combination therapy, which was administered at doses standard in Japan, increased the SAS score (4.5±1.5 to 4.9±1.5, pCirc J 2004; 68: 361 - 366)

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