Multiple emerging risk factors for cardiovascular disease in women must be recognized and assessed to provide timely diagnosis and treatment, according to Dipti N. Itchhaporia, MD, an interventional cardiologist in southern California. These risk factors include pregnancy complications, autoimmune diseases, depression, breast cancer, and breast arterial calcification.
During the session titled “Cardiac Care in Women: Emerging Risk Factors” at CardioAcademic 2023, the former president of the American College of Cardiology emphasized that gender equity in care for cardiovascular disease will be achieved only when risk factors are evaluated from a gender-dependent perspective and when assessments are broadened to include novel and unrecognized risk factors, not just traditional risk factors.
Dr. Itchhaporia also remarked that
“Cardiovascular disease remains the leading cause of death in women, at least in the United States, and globally the outlook is similar,” she explained. “That’s why we need to provide our patients with guidance and carefully investigate when they experience chest pain. We need to remember that smoking and obesity pose a higher risk for cardiovascular disease in women than in men. Taking these risk factors into account will really make a difference by allowing us to provide more timely and targeted care.”
In her presentation, Dr. Itchhaporia noted that cardiovascular disease accounts for 35% of deaths in women worldwide. She reminded her audience that, according to The Lancet Women and Cardiovascular Disease Commission, heart diseases in this population remain “understudied, underrecognized, underdiagnosed, and undertreated. Furthermore, women are underrepresented in cardiovascular [clinical practice].”
She mentioned this because, despite U.S. legislation enacted between 1980 and 1990 that mandated the inclusion of women in clinical trials, women accounted for less than 39% of participants in cardiovascular clinical trials between 2010 and 2017. According to Dr. Itchhaporia, this situation limits the potential for developing tailored strategies and recommendations to treat the cardiovascular diseases affecting women.
Emerging risk factors
Dr. Itchhaporia pointed out that traditional risk factors have been known for many years. For example, 80% of women aged 75 years or younger have arterial hypertension. Only 29% receive adequate blood pressure control, those living with diabetes have a 45% greater risk of suffering ischemic heart disease, and obesity confers a 64% higher risk of developing ischemic heart disease in women versus 46% in men.
In addition to these factors, she noted that emerging factors must be assessed carefully. For example, women who experience pregnancy complications like gestational diabetes have a higher risk for ischemic heart disease and type 2 diabetes. Women with hypertension and preeclampsia are at a threefold higher risk of developing ischemic heart disease.
“Pregnancy can really be a major stress test for the heart, and I believe that, as health care professionals, we should all be asking women if they have had pregnancy-related complications. I don’t think that’s something we’ve been doing on a regular basis. Statistically, we know that 10%-20% of pregnant women report complications during pregnancy, and strong associations have been shown between gestational hypertension [and] preeclampsia.”
Dr. Itchhaporia explained that depression, a condition that globally affects women twice as much as men, is another emerging factor (though it has received some increased recognition). She explained that, in women, depression is a significant risk factor for developing a major adverse cardiovascular event or a combined event of cardiac death and myocardial infarction related to the target lesion and revascularization of the target lesion because of ischemia. Furthermore, women who have experienced a cardiac-related event are more likely to have depression than men.
“If we look into it in more detail, depression leads to changes in behavioral habits and physiological mechanisms,” she said. “Women living with depression are at higher risk of smoking, not exercising as much, are perhaps less careful with their hygiene, are not likely to adhere to their medications, and don’t sleep as well. All this moves them in the direction of heart disease.”
Added to these factors are autoimmune diseases like rheumatoid arthritis and systemic lupus erythematosus, where the female-to-male ratio for rheumatoid arthritis is 2½:1 and for lupus it’s 9:1. Dr. Itchhaporia explained that patients with rheumatoid arthritis are at two- to threefold greater risk for myocardial infarction and have a 50% higher risk for stroke. In the case of systemic lupus, the risk of myocardial infarction is 7-50 times greater than in the general population. She noted that cardiovascular risk calculators underestimate the burden of risk in patients with these diseases.
Lastly, she brought up breast cancer and breast arterial calcification as additional emerging risk factors. She explained that women with breast cancer are more likely to develop hypertension and diabetes, compared with women without this diagnosis. Women with hypertension or diabetes before developing breast cancer have twice the risk for heart problems after cancer.
She added that 12.7% of women screened for breast cancer have some degree of breast calcification. She explained that this occurs when calcium accumulates in the middle layer of artery walls in the breast, which is linked to aging, type 2 diabetes, or arterial hypertension and may be a marker of arterial stiffening, which is a cardiovascular disease.
“It’s extremely important to take into consideration data suggesting a strong association between breast calcifications and cardiovascular disease, independent of other known risk factors of cardiovascular disease. We need to improve our tests for detecting cardiovascular disease in women and we need to ask specific questions and not overlook these emerging factors,” she noted.