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Cardiovascular disease in women: implications of hormone replacement therapy
1Department of Obstetrics and Gynecology, Yale University School of Medicine, New Haven, Connecticut, USA.
Insights
Estrogen replacement therapy (ERT) reduces cardiovascular disease fatalities in women. Estrogen improves arterial function and lipid profiles, while progestins may counteract these benefits.
Area of Science:
- Cardiovascular Science
- Endocrinology
- Women's Health
Background:
- Arterial dysfunction and disease are prevalent in women.
- Ovarian hormones, particularly estrogens, are crucial for maintaining arterial health and preventing atherosclerosis.
- Estrogen replacement therapy (ERT) has shown promise in reducing cardiovascular disease mortality.
Purpose of the Study:
- To evaluate the role of estrogens in arterial function and cardiovascular disease prevention in women.
- To assess the impact of estrogen replacement therapy (ERT) on cardiovascular outcomes and arterial health.
- To investigate the effects of estradiol-17 beta on exercise tolerance and arterial function in women with coronary artery disease (CAD).
Main Methods:
- Review of existing studies on estrogen replacement therapy (ERT) and cardiovascular disease (CVD).
- Analysis of clinical trial data comparing sublingual estradiol-17 beta with placebo in women with CAD.
- Examination of studies involving intracoronary infusion of estradiol-17 beta in women with CAD.
- Review of reports on estrogen deficiency in women with angina and their response to estrogen treatment.
Main Results:
- ERT is associated with a marked reduction in cardiovascular disease fatalities in women, including those with advanced coronary artery disease (CAD).
- Sublingual estradiol-17 beta improved exercise tolerance and reduced ischemia in women with CAD.
- Estradiol-17 beta infusion improved arterial function in women with CAD.
- Women with angina and normal coronary arteries showed improvement with estrogen treatment.
Conclusions:
- Estrogens play a vital role in maintaining arterial function and preventing cardiovascular disease in women.
- Estrogen replacement therapy (ERT) demonstrates significant benefits in reducing cardiovascular mortality and improving arterial health.
- While ERT is beneficial, the addition of progestins in hormone replacement therapy (HRT) may counteract some of estrogen's positive hemodynamic effects, potentially inducing vasoconstriction.
Abstract:
Arterial dysfunction and disease affect a majority of women during their life time. Ovarian hormones inhibit the development of atherosclerosis and play an integral role in the maintenance of normal arterial function. Estrogens act in the liver to improve and maintain lipid profiles and also act in the walls of arteries and in cardiac myocytes to maintain function and prevent disease. Death from cardiovascular disease is reduced in women receiving estrogen replacement therapy (ERT). Ten-year follow-up studies of women with advanced coronary artery disease (CAD) show a marked reduction in fatalities among the women receiving estrogens compared with untreated women. Sublingual estradiol-17 beta compared with placebo results in improved exercise tolerance and reduced ischemia during exercise in women with CAD. Estradiol-17 beta infused into the coronary arteries in women with CAD leads to improved arterial function. Estrogen deficiency has been reported in women with angina pectoris who have normal coronary arteries, and these women respond to estrogen treatment. HRT implies the use of ERT with the addition of a progestin. Progestins oppose the actions of estrogens. Counter-effects of lipid metabolism appear to be minimal with progestins currently in use. Oppositional effects of progestins on hemodynamic actions of estrogens may be significant, as progestins appear to induce vasoconstriction of estrogenized vessels.