What is atherosclerosis?
Most people don’t experience the life-threatening complications of having atherosclerosis — hardening of the arteries — until they reach middle age. However, the beginning stages can actually start during childhood.
The disease tends to be progressive and gets worse with time. Over time, plaque, which is made of fatty cells (cholesterol), calcium, and other waste products, builds up in a major artery. The artery becomes more and more narrow, which means blood is unable to get to areas it needs to reach.
There is also a higher risk that if a blood clot breaks away from another area in the body, it could get stuck in the narrow artery and cut off blood supply completely, causing a heart attack or stroke.
Atherosclerosis is a complex condition, generally starting early in life and progressing as people get older.
For some people, the disease advances quickly in their 20s and 30s, while others may not have issues until their 50s or 60s.
Researchers aren’t exactly sure how or why it begins. It’s believed that plaque starts to build up in arteries after the lining becomes damaged. The most common contributors to this damage are high cholesterol, high blood pressure, and smoking cigarettes.
Your arteries carry oxygenated blood to vital organs like your heart, brain, and kidneys. If the path becomes blocked, these parts of your body can’t function the way they’re supposed to. How your body is affected depends on which arteries are blocked.
These are the diseases related to atherosclerosis:
- Heart disease. When plaque builds up in your coronary arteries (the large vessels that carry blood to your heart), you’re at increased risk for a heart attack.
- Carotid artery disease. When plaque builds up in the large vessels on either side of your neck (carotid arteries) that carry blood to your brain, you’re at higher risk of having a stroke.
- Peripheral artery disease. When plaque builds up in the large arteries that carry blood to your arms and legs, it can cause pain and numbness and can lead to serious infections.
- Kidney disease. When plaque builds up in the large arteries that carry blood to your kidneys, your kidneys can’t function properly. When they don’t function properly, they can’t remove waste from your body, leading to serious complications.
If you have symptoms, like a weak pulse near a major artery, lower blood pressure near an arm or leg, or signs of an aneurysm, your doctor may notice them during a regular physical exam. Results from a blood test can tell the doctor if you have high cholesterol.
Other, more involved tests include:
- Imaging tests. An ultrasound, computerized tomography (CT) scan, or magnetic resonance angiography (MRA) allow doctors to see inside the arteries and tell how severe the blockages are.
- Ankle-brachial index. The blood pressure in your ankles is compared with your arm. If there is an unusual difference, it can point to peripheral artery disease.
- Stress test. Doctors can monitor your heart and breathing while you engage in physical activity, like riding on a stationary bike or briskly walking on a treadmill. Since exercise makes your heart work harder, it can help doctors discover a problem.
If atherosclerosis has progressed beyond what lifestyle changes can reduce, there are medications and surgical treatments available. These are designed to prevent the disease from getting worse and to increase your comfort, particularly if you’re having chest or leg pain as a symptom.
Medications typically include drugs to treat high blood pressure and high cholesterol. Some examples are:
- angiotensin-converting enzyme (ACE) inhibitors
- calcium channel blockers
Surgery is considered a more aggressive treatment and is done if the blockage is life-threatening. A surgeon may go in and remove plaque from an artery or redirect blood flow around the blocked artery.
Healthy dietary changes, stopping smoking, and exercise can be powerful weapons against high blood pressure and high cholesterol, two major contributors to atherosclerosis.
Physical activity helps you lose weight, maintain a normal blood pressure, and boosts your “good cholesterol” (HDL) levels. Aim for 30 to 60 minutes a day of moderate cardio.
- Maintain a healthy weight by eating more fiber. You can achieve this goal, in part, by replacing white breads and pastas with foods made out of whole grains.
- Eat lots of fruits and vegetables as well as healthy fats. Olive oil, avocado, and nuts all have fats that won’t raise your “bad cholesterol” (LDL).
- Limit your cholesterol intake by reducing the amount of high cholesterol foods you eat, like cheese, whole milk, and eggs. Also avoid trans fats and limit saturated fats (mostly found in processed foods), as both cause your body to produce more cholesterol.
- Limit your sodium intake, as this contributes to high blood pressure.
- Limit your alcohol intake. Drinking alcohol regularly can raise your blood pressure and contribute to weight gain (alcohol is high in calories).
These habits are best to start early in life, but they’re beneficial no matter how old you are.