Heart disease remains the leading cause of death among women worldwide, yet women continue to be underrepresented in cardiovascular research and clinical trials. As a result, many treatment decisions for women are still guided by data primarily derived from men. A new study published in the European Heart Journal highlights why this gap matters and suggests that one common treatment choice for clogged arteries may not be the best option for women.
According to the research, women with severe coronary artery disease may experience better long-term survival and fewer cardiac complications when treated with coronary artery bypass surgery rather than stenting. These findings raise important questions about current treatment practices and emphasize the need for more sex-specific evidence in heart care.
Clogged arteries, also known as coronary artery disease, occur when fatty deposits called plaque build up inside the coronary arteries. These arteries supply oxygen-rich blood to the heart muscle. Over time, plaque buildup can restrict blood flow, leading to chest pain, shortness of breath, heart attacks, or even sudden death.
Treatment aims to restore blood flow and prevent future cardiac events. Two of the most common procedures used to treat blocked arteries are coronary stenting and coronary artery bypass grafting.
Stenting is a minimally invasive procedure often performed during angioplasty. A thin tube called a catheter is inserted into a blood vessel and guided to the blocked artery. A small balloon is inflated to widen the artery, and a wire mesh tube called a stent is placed to keep the artery open.
Because stenting is less invasive than surgery, it is often favored for patients who are older, frail, or considered high risk for surgery. Recovery times are usually shorter, and hospital stays are often brief.
Coronary artery bypass grafting, commonly referred to as bypass surgery, is a more invasive procedure. Surgeons take a healthy blood vessel from another part of the body, such as the chest, arm, or leg, and use it to reroute blood around the blocked artery.
While bypass surgery requires a longer recovery period and carries higher short-term surgical risks, it has long been considered the gold standard for patients with complex or severe coronary artery disease.
Researchers examined outcomes among more than 4,000 Canadian women with high-risk coronary artery blockages. Roughly half underwent stenting, while the other half received bypass surgery. The women were carefully matched to ensure the comparison was fair and balanced.
The results were striking.
Women who received stents were about 30 percent more likely to die within several years compared with women who underwent bypass surgery. In addition, stent recipients had significantly higher rates of serious cardiac events, including heart attacks, strokes, repeat procedures to reopen arteries, and hospitalizations for heart-related conditions.
Specifically, about 36 percent of women treated with stents experienced a major cardiac event during follow-up. In contrast, only 22 percent of women who underwent bypass surgery had similar complications.
Experts believe several factors may contribute to these differences. Women often have smaller coronary arteries than men, which can make stent placement more technically challenging and increase the risk of complications. Women are also more likely to have diffuse disease, meaning blockages are spread along longer segments of the artery rather than being confined to one spot.
Hormonal differences, inflammatory responses, and variations in plaque composition may also influence how women respond to stents versus bypass surgery. These biological differences underscore why treatments that work well for men may not always deliver the same benefits for women.
One of the most significant issues highlighted by this study is the lack of female representation in major cardiovascular trials. Historically, women account for only 20 to 25 percent of participants in large clinical studies related to coronary revascularization.
This imbalance means that many treatment guidelines are based largely on male outcomes. As Dr. Mario Gaudino of Weill Cornell Medicine noted, men typically receive evidence-based care grounded in robust data. Women, on the other hand, are often treated using evidence that was never designed with them in mind.
This reality has real-world consequences. Women are about half as likely as men to be referred for bypass surgery, even when their disease severity is similar.
Bypass surgery creates an entirely new route for blood flow, which may provide more durable protection against future blockages. Unlike stents, which address specific narrowed segments, bypass grafts can deliver blood beyond multiple areas of disease.
For women with complex coronary anatomy or widespread plaque buildup, this broader approach may reduce the risk of future heart attacks and the need for repeat procedures. While bypass surgery carries greater upfront risk, the long-term benefits may outweigh those risks for many women.
Despite the compelling findings, researchers caution that treatment decisions should not change overnight. Individual factors such as overall health, surgical risk, artery anatomy, and patient preferences must still guide care.
Dr. Kevin An of NewYork-Presbyterian and Columbia University Irving Medical Center emphasized that personalized decision-making remains essential. Not every woman is a good candidate for bypass surgery, and stenting may still be the appropriate option in certain cases.
However, the study does suggest that bypass surgery deserves stronger consideration for women with high-risk coronary artery disease, particularly when long-term outcomes are the priority.
To address lingering questions, researchers are now conducting a dedicated clinical trial that directly compares stenting and bypass surgery exclusively in women with severe coronary artery disease. This trial aims to generate the high-quality, sex-specific data needed to inform future treatment guidelines.
If the findings confirm current results, they could lead to meaningful changes in how heart disease is treated in women and help close the long-standing gender gap in cardiovascular care.
For women diagnosed with coronary artery disease, these findings highlight the importance of informed conversations with healthcare providers. Asking about all available treatment options, including bypass surgery, can help ensure that care decisions reflect both current evidence and individual needs.
Women should also be encouraged to seek care at medical centers with experience in treating complex heart disease and to advocate for second opinions when appropriate.
Heart disease in women is often underdiagnosed, undertreated, and misunderstood. Studies like this one serve as a reminder that sex differences in medicine are not minor details but critical factors that can influence survival and quality of life.
As research continues to evolve, incorporating women more fully into clinical trials will be essential. Only then can treatment recommendations truly reflect the needs of half the population.
This article is for informational and educational purposes only and does not constitute medical advice. Statistical findings describe general trends and may not apply to individual patients. Health conditions, risks, and treatment options vary widely. Always consult a qualified healthcare professional for personalized medical guidance, diagnosis, or treatment decisions.
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