Oestrogen therapy for prevention of reinfarction in postmenopausal women: a randomised placebo controlled trial.

Background: Results of observational studies suggest that hormone replacement therapy (HRT) could reduce the risk of coronary heart disease (CHD), but those of randomised trials do not indicate a lower risk in women who use oestrogen plus progestagen. The aim of this study was to ascertain whether or not unopposed oestrogen reduces the risk of further cardiac events in postmenopausal women who survive a first myocardial infarction.

Methods: The study was a randomised, blinded, placebo controlled, secondary prevention trial of postmenopausal women, age 50-69 years (n=1017) who had survived a first myocardial infarction.