• Sandeep A Saha, Janos Molnar, and Rohit R Arora.
• Department of Medicine, Chicago Medical School, North Chicago, Illinois 60064, USA.
• J. Cardiovasc. Pharmacol. Ther. 2007 Sep 1;12(3):192-204.

ObjectiveA pooled meta-analysis of published, randomized placebo-controlled clinical trials to evaluate the role of tissue angiotensin-converting enzyme (ACE) inhibitors in secondary prevention of cardiovascular disease in patients with preserved left ventricular function.SourcesPeer-reviewed journals listed in Index Medicus/MEDLINE, the Cochrane Central Register of Controlled Clinical Trials, and the Cochrane Database of Systematic Reviews.Study SelectionRandomized placebo-controlled clinical trials of at least 12 months' duration, in patients with a prior cardiovascular event or at high risk for cardiovascular events, were analyzed. DATA SYNTHESIS AND ANALYSIS: A total of 31,555 patients (136,882 patient-years) from 4 trials were selected for the meta-analysis. Relative risk estimations were made using data pooled from these trials, and statistical significance was determined using the chi2 test. The number of patients needed to treat was also calculated for each outcome.ResultsTissue ACE inhibitors significantly reduced the risk of all-cause mortality, cardiovascular mortality, acute myocardial infarction, and stroke (P < .001 for each). The need for invasive coronary revascularization was reduced (P = .03), as was the risk of hospitalization for congestive heart failure (P = .001). The occurrence of new-onset diabetes was also significantly reduced (P < .001), but the risk of hospitalization for angina was not significantly affected (P = .677). Treating about 100 patients for about 4.5 years would prevent 1 death, 1 non-fatal myocardial infarction, 1 cardiovascular death, or 1 invasive coronary revascularization.ConclusionsTissue ACE inhibitors have demonstrated benefit when used for secondary prevention of cardiovascular disease in patients with preserved left ventricular function in randomized placebo-controlled clinical trials.

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