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(Stroke. 2005;36:2164.)
© 2005 American Heart Association, Inc.

Original Contributions

Perindopril-Based Blood Pressure–Lowering Reduces Major Vascular Events in Patients With Atrial Fibrillation and Prior Stroke or Transient Ischemic Attack

Hisatomi Arima, MD; Robert G. Hart, MD; Sam Colman, BEc, BSc; John Chalmers, MD; Craig Anderson, MD; Anthony Rodgers, MD; Mark Woodward, PhD; Stephen MacMahon, PhD; Bruce Neal, MD for the PROGRESS Collaborative Group

From the George Institute for International Health, University of Sydney, Australia (H.A., S.C., J.C., C.A., M.W., S.M., B.N.); the Department of Medicine (Neurology), University of Texas Health Science Center (R.G.H.); and the Clinical Trials Research Unit, University of Auckland, New Zealand (A.R.).

Correspondence to Professor John Chalmers, PROGRESS Collaborative Group, c/o The George Institute for International Health, University of Sydney, PO Box M201, Missenden Road, New South Wales 2050, Australia. E-mail jchalmers{at}thegeorgeinstitute.org

Background and Purpose— Patients with atrial fibrillation have a high risk of stroke and other vascular events even if anticoagulated. The primary objective here is to determine whether routine blood pressure–lowering provides additional protection for this high-risk patient group.

Methods— This study was a subsidiary analysis of the Perindopril Protection Against Recurrent Stroke Study (PROGRESS)—a randomized, placebo-controlled trial that established the beneficial effects of blood pressure–lowering in a heterogeneous group of patients with cerebrovascular disease. A total of 6105 patients were randomly assigned to either active treatment (2 to 4 mg perindopril for all participants plus 2.0 to 2.5 mg indapamide for those without an indication for or a contraindication to a diuretic) or matching placebo(s). Outcomes are total major vascular events, cause-specific vascular outcomes, and death from any cause.

Results— There were 476 patients with atrial fibrillation at baseline, of whom 51% were taking anticoagulants. In these patients, active treatment lowered mean blood pressure by 7.3/3.4 mm Hg and was associated with a 38% (95% confidence interval [CI], 6 to 59) reduction in major vascular events and 34% (95% CI, –13 to 61) reduction in stroke. The benefits of blood pressure–lowering in patients with atrial fibrillation were achieved irrespective of the use of anticoagulant therapy (P homogeneity=0.8) or the presence of hypertension (P homogeneity=0.4).

Conclusions— For most patients with atrial fibrillation, routine blood pressure–lowering is likely to provide protection against major vascular events additional to that conferred by anticoagulation.

Key Words: antihypertensive agents • atrial fibrillation • randomized, controlled trials • stroke

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