Your arteries may be lying to you: Cardiologist warns the most dangerous heart plaque is not the one you can see coming

Heart disease warnings often focus on cholesterol numbers and blocked arteries, but cardiologists say the real story is more nuanced. A recent Instagram post by US-based cardiologist Dr Jeremy London has drawn attention to a critical distinction many people overlook. Not all plaque inside the arteries behaves the same way, and understanding this difference could change how people think about heart risk and prevention.

Two plaques, two very different risks

In his video, Dr London explains that arterial plaque broadly falls into two categories. Soft plaque and hard plaque. While both are linked to atherosclerosis, they pose different kinds of danger.

Soft plaque is fatty, inflamed, and unstable. According to Dr London, this type is more dangerous in the short term because it can rupture suddenly and trigger a heart attack with little or no warning. Hard plaque, also known as calcified plaque, is older and more stable. It reflects long standing disease that has scarred over time and is less likely to rupture abruptly.


The key distinction, Dr London says, is risk timing. Soft plaque predicts short term cardiac events, while hard plaque signals long term cardiovascular risk. A high calcium burden in the arteries means atherosclerosis has been present for years, even if the plaque itself appears stable.

View this post on Instagram

A post shared by Jeremy London, MD (@drjeremylondon)

How doctors detect plaque inside arteries

Dr London notes that a CT coronary angiogram can help identify both soft and hard plaque. He emphasizes that this is a screening tool rather than a definitive diagnosis and should only be used when guided by a physician. For the right patient, however, it offers valuable insight into hidden heart risk that standard tests may miss.

Why plaque type matters more than symptoms

Many people assume heart attacks only happen when arteries are severely blocked. Soft plaque challenges that belief. Because it is unstable, it can rupture even when blockages are not extreme. This explains why some people suffer heart attacks despite having few warning signs or mild symptoms.

Hard plaque tells a different story. Its presence suggests chronic artery damage and raises lifetime risk, even if immediate danger seems low. Doctors use this information to guide long term prevention strategies rather than emergency interventions.

What science says about caring for your arteries

Healthline reports that plaque buildup can often be stabilised and, in some cases, partially reversed through medication and lifestyle changes. Managing cholesterol, blood pressure, smoking, stress, and physical activity plays a central role in slowing atherosclerosis.

Diet patterns such as the DASH eating plan, which emphasise fruits, vegetables, whole grains, and healthy fats, have been shown to reduce LDL cholesterol and slow plaque progression. A 2021 study cited by Healthline found that combining dietary changes with physical activity slowed artery damage compared to no intervention.

Inflammation also matters. Research highlighted by Healthline suggests pro inflammatory foods may worsen plaque formation, reinforcing the importance of overall dietary quality rather than focusing on fat intake alone.

Lifestyle choices that protect artery health

Regular physical activity improves blood flow and reduces cardiovascular risk. Health authorities recommend 150 to 300 minutes of moderate intensity activity per week, along with muscle strengthening exercises twice weekly. Managing cholesterol through diet or medication, maintaining a moderate weight, quitting smoking, limiting alcohol, and reducing stress all contribute to healthier arteries.

Healthline also notes that cholesterol lowering medications such as statins can stabilise plaque within weeks and may lead to plaque regression over time when combined with lifestyle changes.

Dr Jeremy London brings a personal dimension to his advocacy. A board certified cardiothoracic and vascular surgeon with more than 25 years of experience, he is also a heart attack survivor who suffered a 99 percent blockage in his right coronary artery. He frequently uses his platform to translate complex heart science into practical guidance, stressing habits like regular exercise, avoiding ultra processed foods, and eliminating alcohol.