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Journal of Hypertension:
doi: 10.1097/HJH.0b013e328306ebe2
Meta-analysis

Comparison between angiotensin-converting enzyme inhibitors and angiotensin receptor blockers on the risk of myocardial infarction, stroke and death: a meta-analysis

Reboldi, Gianpaoloa; Angeli, Fabiob; Cavallini, Claudiob; Gentile, Giorgioa; Mancia, Giuseppec; Verdecchia, Paolob

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Abstract

Objectives: To compare the effects of angiotensin II receptor blockers and angiotensin-converting enzyme inhibitors on the risk of myocardial infarction, stroke, cardiovascular mortality and total mortality.

Methods: We conducted a meta-analysis of randomized comparative trials between angiotensin II receptor blockers and angiotensin-converting enzyme inhibitors. Inclusion criteria were publication in peer-reviewed journals indexed in Medline, randomized comparison of angiotensin II receptor blockers vs. angiotensin-converting enzyme inhibitors, or angiotensin II receptor blockers + angiotensin-converting enzyme inhibitors vs. angiotensin-converting enzyme inhibitors, report of major complications including myocardial infarction, stroke, cardiovascular mortality or all-cause mortality; average follow-up of at least 1 year in at least 200 patients.

Results: Six trials fulfilled the inclusion criteria, for a total of 49 924 patients. In the pooled estimate, there were no significant differences between angiotensin II receptor blockers and angiotensin-converting enzyme inhibitors on the risk of myocardial infarction (odds ratio 1.01; 95% confidence interval 0.95–1.07; P = 0.75), cardiovascular mortality (odds ratio 1.03; 95% confidence interval 0.98–1.08; P = 0.23) and total mortality (odds ratio 1.03; 95% confidence interval 0.97–1.10; P = 0.20). This was the case also when the analysis involved only the comparison between angiotensin-converting enzyme inhibitors and angiotensin II receptor blockers. Overall, the risk of stroke was slightly lower with angiotensin II receptor blockers than angiotensin-converting enzyme inhibitors (odds ratio 0.92; 95% confidence interval 0.85–0.99; P = 0.037), the direct angiotensin-converting enzyme inhibitors and angiotensin II receptor blockers comparison showing a nonsignificant trend in a similar direction. Statistical heterogeneity among trials was not significant, with a low to null inconsistency statistic, for stroke (P = 0.67), myocardial infarction (P = 0.86), cardiovascular mortality (P = 0.14) and total mortality (P = 0.12).

Conclusion: This overview suggests that angiotensin II receptor blockers are as effective as angiotensin-converting enzyme inhibitors on the risk of myocardial infarction, cardiovascular mortality and total mortality. Angiotensin II receptor blockers may be slightly more protective than angiotensin-converting enzyme inhibitors on the risk of stroke.

© 2008 Lippincott Williams & Wilkins, Inc.

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