Mounting Research Links Gum Disease to Plaque Buildup in Coronary Arteries

A new scientific statement from the American Heart Association (AHA) suggests that taking care of your teeth might be just as important for your heart as diet and exercise. The report, published in the AHA’s flagship journal Circulation, details a growing body of evidence linking gum disease (periodontal disease) with a higher risk of major cardiovascular events, including heart attack, stroke, and heart failure.

For the average health consumer, this report confirms a link that medical professionals have suspected for years: oral health is a window into overall physical health. While a direct cause-and-effect relationship is still being studied, the connection centers on inflammation—a biological response that can damage blood vessels and stress the heart.

"This reinforces that periodontal disease is consistently associated with atherosclerotic cardiovascular disease, likely mediated through systemic inflammation and oral–vascular microbial pathways.," explains Sergiu Darabant, M.D., a cardiologist with Baptist Health Miami Cardiac & Vascular Institute. "Treating periodontal disease improves inflammation and some heart-related risk factors, but it has not yet been proven to reduce heart attacks or strokes."

Understanding the Terminology

To understand this link, it is helpful to clarify two medical conditions that, at first glance, seem unrelated: Periodontal Disease and Atherosclerotic Cardiovascular Disease (ASCVD).

Periodontal Disease is a chronic inflammatory condition affecting the gums and bone supporting the teeth. It affects more than 40% of U.S. adults over the age of 30. It typically starts as gingivitis—red, swollen gums caused by a buildup of oral plaque (a sticky film of bacteria). If untreated, it progresses to periodontitis, where gums pull away from teeth, creating infected pockets that can destroy bone and lead to tooth loss.

ASCVD stands for Atherosclerotic Cardiovascular Disease. This is the leading cause of death globally. It is caused by the buildup of a different kind of plaque—fatty deposits made of cholesterol and other substances—inside the arteries. This buildup hardens and narrows the arteries, restricting blood flow. ASCVD includes conditions like coronary heart disease, stroke, and peripheral artery disease (poor circulation in the legs).

The new AHA statement highlights that people with gum disease are significantly more likely to develop ASCVD.

The Inflammation Pathway

How does a gum infection reach the heart? The primary suspect is inflammation.

When you have advanced gum disease, the barrier between your gums and your bloodstream becomes compromised. This allows oral bacteria to enter your circulation. The body responds to these invaders with inflammation. While short-term inflammation helps heal wounds, chronic (long-term) inflammation can damage the inner lining of blood vessels. This damage may encourage the buildup of arterial plaque, increasing the risk of a blockage that causes a heart attack or stroke.

There were some surprising aspects to  the new research from the AHA.

“The strength and consistency of associations with subclinical outcomes, such as carotid intima-media thickness, endothelial dysfunction, and arterial stiffness -- are surprising,” said Dr. Darabant. “Additionally, emerging links to conditions like atrial fibrillation, heart failure, and cognitive impairment extend beyond traditional ASCVD (Atherosclerotic Cardiovascular Disease) outcomes and broaden the clinical relevance.”

Shared Risk Factors

The report also notes that gum disease and heart disease often strike the same people because they share common risk factors. Poor diet, smoking, diabetes, obesity, and high blood pressure are major contributors to both conditions.

However, the AHA statement suggests there is an independent association between the two. Even when researchers account for factors like smoking or diabetes, the link between poor oral health and poor heart health often remains. This suggests that gum disease itself may be a unique driver of heart risk.

The data indicates that gum disease is associated with increased risks of:

• Heart Attack: A blockage of blood flow to the heart muscle.
• Stroke: A disruption of blood flow to the brain.
• Atrial Fibrillation: An irregular, often rapid heart rate that causes poor blood flow.
• Heart Failure: A condition where the heart doesn't pump blood as well as it should.

Dr. Darabant stresses that the new research has some limitations.

“Most of the evidence comes from observational studies, which makes it hard to prove cause and effect,” he explains. “Clinical trials so far have been small or underpowered and have not clearly shown fewer cardiovascular events with periodontal treatment.”

Prevention is Key

While scientists are still conducting long-term trials to see if treating gum disease directly prevents heart attacks, the current consensus is that reducing inflammation is always beneficial.

The AHA report highlighted interesting data regarding daily habits. Studies have found that more frequent tooth brushing is associated with a lower 10-year risk of ASCVD. Specifically, those who brushed once a day or less had a 13.7% risk, while those who brushed three or more times per day saw that risk drop to 7.35%. This simple habit also correlated with reduced markers of inflammation in the blood.

For patients with existing heart concerns, or those with risk factors like diabetes, this makes dental hygiene a critical component of preventive cardiology.

“People should see good oral hygiene and regular dental care as part of overall heart health and as part of cardiovascular risk management,” said Dr. Darabant. “Treating gum disease should complement, not replace, proven cardiovascular prevention strategies such as blood pressure control, lipid management, and healthy lifestyle habits.”

Actionable Steps

The takeaway from the AHA’s scientific statement is: You cannot ignore your mouth if you want to protect your heart. Here are practical steps to lower your risk:

1. Brush and Floss Daily: It sounds basic, but it is your first line of defense against oral inflammation.
2. Monitor Your Gums: Healthy gums do not bleed. If you see blood when you brush or floss, you may have gingivitis. Treat it early before it progresses.
3. Know Your Risk: If you have diabetes or smoke, you are at higher risk for both gum disease and heart disease. Be extra vigilant with check-ups.
4. Inform Your Doctor: Let your cardiologist know if you have been diagnosed with gum disease, and tell your dentist about your heart history.