Naturopathic prevention and treatment of cardiovascular disease in women
Categories: medical diagnosisHormone Replacement Therapy (HRT) and Cardioprotection
Conjugated Estrogens (Premarin)
In developed nations, the leading overall cause of mortality in women is coronary artery disease (CAD), (1) with the risk of the disease increasing dramatically after menopause. The hypothesis that loss of estrogen is the cause is supported by studies of younger women who are postmenopausal due to surgery. (2) In an effort to combat CAD, many postmenopausal women were placed on an estrogen replacement therapy regimen using conjugated equine estrogens believed to provide a wide spectrum of beneficial cardiovascular effects, such as
* relaxation of precontracted smooth muscle cells,
* inhibition of calcium entry,
* enhancement of nitric oxide synthase reactivity,
* stimulation of prostacyclin,
* prevention of myointimal hyperplasia, and
* endothelium-dependent vasodilation of coronary and brachial arteries.
However, newer clinical studies have shown that that this “magic bullet for menopause” not only failed to live up to its earlier promise, but also is responsible for concomitant adverse effects, ranging from hypertriglyceridemia, endometrial hyperplasia, tumorigenesis, and hypercoagulable states. In fact, the National Institutes of Health (NIH) discontinued several phases of the now famous Women’s Health Initiative (WHI) study (3) because the risks of hormone therapy, including estrogen-only therapy and combined estrogen plus progestogen therapy, far outweighed the documented benefits associated with these hormones.
Data from the discontinued estrogen-only study showed that estrogen not only had no effect on preventing heart disease after seven years of continuous use but also increased the risk of stroke, with a separate report pointing to “probable” dementia and/or mild cognitive impairment associated with estrogen-alone therapy. (4,5) The combined estrogen plus progestogen therapy also failed to live up to its promise. While it did prevent the stimulation of endometrial hyperplasia, it failed to provide lipid-lowering effects. (6) In addition, synthetic progestins presented an even greater risk of breast cancer than estrogen alone (7) and increased the risk of stroke, heart attacks, and blood clots in legs and lungs. (8) Fortunately, there are now other options available to women that afford cardioprotection and have a consistent safety profile.
Bioidentical Hormone Therapy
Since the 1930s, synthetic estrogens have been used to alleviate the major menopausal symptoms, with synthetic progestins becoming part of the therapy in the 1980s to counter the dramatic rise in uterine cancer that was related to estrogen-only treatment. (9) With the advent of bioidentical/natural hormone replacement therapy (BHRT), women now have a viable option that will alleviate menopausal symptoms while providing the cardiovascular protection formerly provided by their body’s own hormone supply. The therapy uses hormones derived from a range of sources, including plants (phytoestrogens) as well as dehydroepiandrosterone, pregnenolone, cortisol, growth hormone, estradiol, estrone, and estriol, along with natural progesterone and testosterone, if needed. (10)
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The importance of using a natural hormone, like natural progesterone, for example, versus synthetic progestins is twofold. First, research (11) has shown that progesterone can inhibit the change of cholesterol into cytoplasmic cholesteryl ester (CE) (a crucial early step of atherogenesis, more commonly known as “hardening of the arteries”) and decrease CE macrophage cellular levels. Second, natural progesterone can also block the increase of CE accumulation in macrophages. Unfortunately, this beneficial effect can be inhibited by synthetic progestins, demonstrating the importance in developing remedies derived from nature rather than synthesized in a laboratory environment. (12)
Cardioprotectants in Women: Whole Grains, Fruits, Vegetables, and Plant-Based Phytoestrogens
In addition to utilizing BHRT to address both menopausal symptoms and the increased risk of cardiovascular disease that can accompany them, women can also gain a level of cardioprotection from specific dietary choices–specifically, whole grains, plant-based phytoestrogens, fruits, and vegetables. This is especially important when other cardiovascular risk factors, such as hormone replacement therapy (HRT) use, smoking, alcohol consumption, saturated and trans-fatty acid intake, and sedentary lifestyle, exist.
Whole Grains and Ischemic Stroke
Various studies (13) have demonstrated the inverse association of the intake of whole grains and the risk of ischemic stroke and ischemic heart disease (IHD) among women. In each case, whole grains provided a significant benefit unmatched by refined and total grain intake. For example, in the Iowa Women’s Health Study, (14) involving 34,492 women, there was a one-third reduction in IHD risk noted during a nine-year follow-up period–even after controlling for many confounding variables such as dietary fat and cholesterol–which correlated inversely with whole grain intake.