February is Heart Health Month, making it a great time to focus on building and maintaining heart-healthy habits. Carotid artery disease is often overlooked and is the leading cause of stroke. This disease is extremely dangerous because it develops silently over many years without noticeable symptoms. Often, it is only detected once a person experiences a transient ischemic attack (TIA), which mimics stroke-like symptoms such as numbness, weakness, or difficulty speaking. Understanding what carotid artery disease is essential for recognizing symptoms and how to prevent risk factors.
What Carotid Artery Disease Is
Carotid Artery Disease is a condition in which the arteries in the neck become narrowed or blocked. These arteries supply the brain with oxygen-rich blood. When they narrow, blood has a harder time traveling to the brain. This reduces the amount of oxygen and nutrients that reach the brain.
The narrowing is caused by atherosclerosis, the buildup of fatty plaque. Plaque is made up of:
- Fats
- Cholesterol
- Other substances in and on the artery walls
The buildup hardens and thickens on the walls, limiting blood flow and increasing pressure within the vessels.
Carotid artery disease is dangerous because it increases the risk of having a stroke. If plaque or a blood clot travels to the brain, a stroke can occur. Symptoms are not noticeable until a stroke or TIA occurs.
What Causes Carotid Artery Disease?
Carotid Artery Disease is caused by atherosclerosis and can present with sudden weakness, numbness, or tingling on one side of the body. Atherosclerosis occurs when fatty deposits build up in the inner walls of arteries, restricting blood flow and hardening the arteries.
Because of reduced blood flow to the brain due to narrowing of the carotid arteries, carotid artery disease develops. Slurred speech and vision loss can also be symptoms. Atherosclerosis is often triggered by smoking, diabetes, aging, or high blood pressure.
Risk Factors
Carotid artery disease occurs when the carotid arteries are blocked or narrowed by plaque buildup. Because symptoms may not appear until blood flow is severely restricted, it is important to note the risk factors. Recognizing these factors allows individuals to take early steps towards prevention. Risk factors include:
Smoking
Smoking is the most preventable risk factor for carotid artery disease. Tobacco smoke contains harmful chemicals, like nicotine and carbon monoxide, that directly injure the inner lining of blood vessels. These chemicals cause blood platelets to stick together and form clots. Over time, chronic smoking weakens the arterial walls, accelerates atherosclerosis, and significantly raises the risk of blood clots, which can cause a stroke.
High Blood Pressure
High blood pressure constantly stresses the artery walls. This repeated strain causes tears in the lining of the carotid arteries, allowing cholesterol and fatty plaque to spread. As plaque builds up, the arteries become thicker and narrower, which restricts blood flow to the brain. Poorly controlled high blood pressure is a major contributor to carotid artery disease and increases stroke risk.
High Cholesterol
High cholesterol levels play a key role in the development of carotid artery disease. When cholesterol builds up, it triggers inflammation and progressive plaque formation, damaging the artery walls. Blood flow is reduced, leading to clot formation that could result in a stroke or a transient ischemic attack.
Age
Age is a non-modifiable risk factor for carotid artery disease. Over time, the carotid arteries naturally lose elasticity and become stiffer. Age-related damage includes structural arterial changes, atherosclerosis accumulation, and increased vulnerability to damage.
Diabetes
Because of persistently elevated blood sugar levels, diabetes causes damage to blood vessels. Chronic hyperglycemia injures the arterial lining, promoting inflammation and plaque buildup. People with diabetes often have coexisting conditions such as high blood pressure and abnormal cholesterol levels. These factors accelerate atherosclerosis and increase the risk of carotid artery disease and stroke.
Obesity
Obesity contributes to carotid artery disease by promoting chronic inflammation and metabolic dysfunction. People with excess body weight often experience high blood pressure and insulin resistance, which can lead to carotid wall thickening and increased plaque buildup.
Family History
A family history of carotid artery disease, heart disease, or stroke increases risk. Inherited traits may affect cholesterol, metabolism, arterial structure, and blood pressure regulation.
Carotid artery disease is strongly influenced by these main factors. While some risks, such as age and history, cannot be changed, many others can be managed through a healthy lifestyle and proper medical care.
In addition to these primary risk factors, several other complications and lifestyle habits can contribute to the development and progression of the condition. Addressing these additional contributing factors is an important part of reducing overall stroke risk.
Other Contributing Factors
Unhealthy Diet
An unhealthy diet in saturated fats, sugar, and high sodium can accelerate carotid artery disease. Poor dietary choices contribute to elevated cholesterol levels, increased blood pressure, and chronic inflammation, all of which damage blood vessels over time. Diets lacking essential nutrients, antioxidants, and dietary fiber reduce the body’s ability to repair vascular damage and maintain healthy arteries.
Consistently consuming processed foods and sugary beverages increases plaque formation and raises the risk of carotid artery narrowing and stroke. For a more in-depth discussion on what foods to eat for a healthy heart, check out our blog on Changing Your Diet for Your Heart.
Lack of Physical Activity
Physical inactivity is a major contributor to carotid artery disease. An inactive lifestyle increases the risk of high blood pressure, obesity, high cholesterol, and diabetes, all of which accelerate atherosclerosis.
Regular physical activity helps improve blood circulation, reduce inflammation, and maintain healthy cholesterol and blood sugar levels. Incorporating daily movement, such as walking, cycling, or strength training, supports vascular health and reduces overall stroke risk.
Gender
Gender differences influence the risk and progression of carotid artery disease. Men tend to develop plaque buildup earlier in life, which places them at higher risk at a younger age. Women, on the other hand, often experience increased arterial stiffness after menopause due to declining estrogen levels.
Kidney Disease
Chronic kidney disease is strongly associated with an increased risk of carotid artery disease. Kidney dysfunction contributes to chronic inflammation, arterial stiffness, and disturbances in calcium and phosphate balance, all of which promote vascular damage.
People with kidney disease often experience worsening high blood pressure and accelerated atherosclerosis, increasing the likelihood of carotid artery narrowing.
Metabolic Syndrome
Metabolic syndrome is a cluster of conditions that includes abdominal obesity, high blood pressure, elevated blood sugar, and abnormal cholesterol levels. Together, these factors cause structural damage to the arterial walls and promote plaque buildup.
Alcohol and Drug Use
Excessive alcohol consumption and illicit drug use can damage blood vessel walls and raise blood pressure. These substances contribute to inflammation, increased blood lipid levels, and impaired vascular function. Over time, repeated exposure to alcohol and drugs accelerates plaque buildup in the carotid arteries, increasing the risk of blood clots and stroke.
How It’s Diagnosed
How is Carotid Artery Disease Diagnosed?
Carotid artery disease is diagnosed through a physical examination and imaging tests. Because the condition often develops silently, these tests are essential to find narrowed or blocked arteries before a stroke occurs.
Physical Examination
During a physical exam, a healthcare provider listens to the neck arteries with a stethoscope. The doctor is checking for an abnormal sound, called a bruit. This sound may suggest narrow carotid arteries due to plaque buildup. While a bruit alone does not confirm carotid artery disease, it often signals the need for further testing.
Imaging Tests
Doctors use several imaging tests to confirm the diagnosis and assess the degree of carotid artery narrowing.
Duplex Ultrasound
Duplex ultrasound is the most common initial test. It uses sound waves to measure blood flow and helps identify narrow or blocked carotid arteries. This test is painless and noninvasive.
Computed Tomography
Computed tomography angiography, also called CT angiography, uses X-rays and contrast dye to create detailed images of the carotid arteries. The scan produces both two-dimensional and three-dimensional images. It allows doctors to see the location and extent of plaque and blockages.
Magnetic Resonance Angiography
Magnetic resonance angiography, or MR angiography, uses magnetic fields and radio waves to produce detailed images of the carotid arteries. Sometimes, contrast dye is used to improve image quality. This test provides information about blood vessel structure and blood flow.
Advanced Diagnostic Testing
In certain cases, more advanced testing may be needed. Carotid angiography is a minimally invasive procedure. A catheter is inserted into a blood vessel, and contrast dye is injected. This creates detailed X-ray images of the arteries. This test is usually reserved for situations where doctors are considering surgery or other interventions.
Brain Imaging
Additional imaging, such as a CT scan or MRI of the brain, may be performed to check for signs of a previous stroke. Doctors may also look for a transient ischemic attack or other brain abnormalities related to reduced blood flow.
Treatment Options
Treatment for carotid artery disease depends on the severity of the blockage and the patient’s overall health. In mild cases, treatment focuses on medical therapy and lifestyle changes. Advanced disease may require a procedure to lower the risk of stroke.
Medical and Lifestyle Management
The first line of treatment for carotid artery disease is usually medical and lifestyle management. Medical therapy lowers stroke risk and addresses the causes of atherosclerosis.
Common Medical Treatments
- Antiplatelet Medications: Such as aspirin or clopidogrel prevent platelets from sticking together and forming blood clots.
- Statins: Help lower cholesterol and stabilize plaque within the arteries.
- Blood Pressure Medications: Used to maintain blood pressure in a healthy range.
- Diabetes Management: Helps blood sugar levels, as diabetes accelerates atherosclerosis.
Lifestyle Management
Lifestyle modifications are just as important. They can help slow, halt, or reverse damage. Examples include quitting smoking, eating a heart-healthy diet, getting regular physical activity, and maintaining a healthy weight.
Medical therapy and lifestyle changes play an important role in reducing stroke risk and preventing disease progression.
Procedural Treatment Options
For moderate to severe blockages, procedural intervention may be necessary. These options should be discussed with a healthcare provider.
- Carotid Endarterectomy (CEA): A surgical procedure that involves making an incision in the neck to open the carotid artery and remove the plaque directly.
- Carotid Angioplasty and Stenting (CAS): A minimally invasive procedure in which a catheter with a balloon is inserted through a blood vessel, usually in the groin, and advanced to the carotid artery. The balloon is inflated to widen the artery, and a stent is placed to keep it open.
- TransCarotid Artery Revascularization (TCAR): A less invasive approach involving a small incision at the neck to access the carotid artery directly. During the procedure, blood flow is temporarily reversed to protect the brain while a stent is placed to keep the artery open.
Choosing the Right Treatment
The most appropriate treatment depends on the severity of the blockage, symptoms, and overall health. Consult your doctor today to choose the right treatment based on your specific condition.
Carotid Artery Disease Treatment in Middle Tennessee
Patients experiencing any symptoms of carotid artery disease, or who want to combat it early, should contact The Surgical Clinic to schedule an appointment at one of our Middle Tennessee locations.