Hormone replacement therapy and the prevention of cardiovascular disease

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Abstract
Cardiovascular disease (CVD) is the primary killer of both men and women in Western societies. The implementation of preventive strategies has led to a fall in the rate of CVD, but there is still much to be achieved. Proven interventional strategies are largely under-utilized, and the search continues for further promising interventions. HRT appears to reduce CVD in post-menopausal women, based on observational data supported by plethora of evidence for the beneficial cardiovascular effects of estrogen. However, a recent controlled trial in post-menopausal women with established CVD has shown that a specific combined oral HRT regimen did not reduce, and may even contribute to, an early increase in cardiovascular events, suggesting that HRT is inappropriate in secondary prevention. HRT may be useful in the primary prevention of CVD, yet observational data that suggested cardiovascular benefit with HRT also suggests that 80% of CVD in women could be eliminated by lifestyle modification, without the attendant risks of HRT including thrombosis and (potentially) breast cancer. At present, it is arguable that the evidence is inadequate to recommend HRT solely for the purpose of CVD prevention, and that the challenge for the health professional should be appropriate utilization of established preventative therapies, with further research into the potential role of HRT and estrogen-receptor modulators.

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