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An In Vivo Estrogen Deficiency Mouse Model for Screening Exogenous Estrogen Treatments of Cardiovascular Dysfunction After Menopause
Published on: August 13, 2019
Cardiovascular risk and hormone replacement therapy
Debbie A Lawlor1, George Davey Smith
1Department of Social Medicine, University of Bristol, Bristol, UK. d.a.lawlor@bristol.ac.uk
Insights
Hormone replacement therapy (HRT) does not protect against coronary heart disease or stroke. Effective cardiovascular disease prevention in women involves managing lifestyle factors like smoking and blood pressure.
Area of Science:
- Cardiovascular Medicine
- Endocrinology
- Women's Health
Background:
- Hormone replacement therapy (HRT) is used to manage menopausal symptoms.
- Its impact on cardiovascular disease (CVD) risk remains a critical area of research.
Purpose of the Study:
- To review human studies on the relationship between HRT and coronary heart disease (CHD) and stroke.
- To synthesize evidence from randomized controlled trials (RCTs) regarding HRT's cardiovascular effects.
Main Methods:
- Analysis of nine secondary prevention RCTs and four primary prevention RCTs.
- Inclusion of a pooled analysis of 22 RCTs with non-cardiovascular primary aims.
- Evaluation of evidence on HRT's effect on CHD, stroke, and atherosclerosis progression.
Main Results:
- Most RCTs indicate HRT either increases CVD risk or has no effect.
- One small primary prevention RCT suggested a minor protective effect on carotid artery thickness.
- Overall evidence does not support a protective role for HRT in cardiovascular health.
Conclusions:
- RCT evidence suggests HRT is not protective against CHD, stroke, or atherosclerosis.
- Cardiovascular disease prevention in women should prioritize established methods.
- Effective strategies include managing smoking, obesity, hypertension, dyslipidemia, and glucose intolerance.
Purpose Of Review:
The purpose of this review is to summarize the studies in humans of the relationship between hormone replacement therapy and coronary heart disease and stroke.
Recent Findings:
Randomized controlled trial evidence of the effect of hormone replacement therapy on coronary heart disease, stroke and atherosclerosis comes from nine individual secondary prevention randomized controlled trials, four individual primary prevention randomized controlled trials and a pooled analysis of 22 randomized controlled trials that had primary aims to examine noncardiovascular outcomes but which reported cardiovascular events by randomized groups. With the exception of one small primary prevention randomized controlled trial that found a weak protective effect of hormone replacement therapy on the progression of carotid artery intima media thickness, all other randomized controlled trials have found hormone replacement therapy either increases the risk of cardiovascular disease or has no effect.
Summary:
Randomized controlled trial evidence conducted in a variety of populations suggests that hormone replacement therapy is not protective against the risk of coronary heart disease, stroke or progression of atherosclerosis. The prevention of cardiovascular disease in women, as in men, should focus on implementing effective methods of reducing smoking, obesity, high blood pressure, dyslipidaemia and glucose intolerance.
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