Arteriosclerosis is a gradual process where arteries become thick and stiff over many years, often without symptoms until serious complications develop. Early detection through routine check-ups and understanding when to seek diagnostic testing can make the difference between preventing complications or facing life-threatening events like heart attack or stroke.

Introduction: Who Should Seek Diagnostic Testing

Arteriosclerosis develops silently, making it particularly dangerous because most people feel completely fine while the disease progresses. You may have no symptoms for years, even decades, until the hardening of your arteries leads to serious complications. This is why knowing when to seek diagnostic testing is crucial for protecting your health.

If you belong to certain risk groups, you should talk to your doctor about diagnostic testing even if you feel healthy. People who should consider getting checked include those who smoke or use tobacco products, have high blood pressure, have high cholesterol levels, or have diabetes. If you have a family history of heart disease—especially if a male relative had heart problems before age 55 or a female relative before age 65—you should also discuss testing with your healthcare provider. Additionally, if you are a man older than 45 or a woman older than 55, the risk increases naturally with age, making regular check-ups more important.^[1][2]

You should seek medical attention immediately if you experience warning symptoms. These can vary widely depending on which arteries are affected. Chest pain or pressure, especially during physical activity or emotional stress, could indicate problems with the arteries feeding your heart. If you experience sudden weakness, numbness in your face or limbs, confusion, difficulty understanding speech, or problems seeing, these could be signs that arteries leading to your brain are affected. Shortness of breath during light activities, dizziness, or heart palpitations are also important warning signs that should not be ignored.^[1][5]

Some symptoms appear more gradually but still deserve attention. If you notice leg pain when walking or climbing stairs that goes away with rest, this condition called intermittent claudication (muscle pain from insufficient blood flow) might indicate blocked arteries in your legs. Burning or aching pain in your feet while resting, especially when lying flat, is another concerning sign. Changes in skin color on your feet, cool skin, or sores that don’t heal on your feet or toes all suggest blood flow problems that need evaluation.^[2][5]

For men, erectile dysfunction (difficulty achieving or maintaining an erection) can be an early warning sign of arteriosclerosis and increased risk for plaque buildup. Because the blood vessels that supply the penis are smaller than those feeding the heart or brain, they may become blocked earlier. If you experience erectile dysfunction, it’s important to talk with your healthcare provider about your risk of arterial disease rather than ignoring this symptom.^[4]

Diagnostic Methods for Identifying Arteriosclerosis

When you visit your healthcare provider with concerns about arteriosclerosis or for a routine check-up, the diagnostic process typically begins with a thorough physical examination. Your doctor will listen to your heart and blood vessels using a stethoscope, checking for unusual sounds. When plaque builds up in arteries, it can create turbulent blood flow that produces a whooshing sound called a bruit. This sound, particularly when heard in the neck arteries, suggests narrowing that could lead to stroke.^[1][4]

Blood tests are fundamental tools in diagnosing arteriosclerosis because they reveal the levels of substances that contribute to plaque buildup. A lipid profile or lipid panel measures your total cholesterol, LDL cholesterol (often called “bad” cholesterol), HDL cholesterol (often called “good” cholesterol), and triglycerides. High levels of LDL cholesterol mean more cholesterol is available to lodge in your artery walls and form plaques. Triglycerides are another type of fat in your blood, and high levels combined with high LDL or low HDL cholesterol can increase your risk of arteriosclerosis. Your doctor will also check your blood sugar levels, as diabetes is a significant risk factor for arterial disease.^[4][16]

Sometimes doctors order a test for C-reactive protein, or CRP. This is a substance in your blood that increases when there is inflammation somewhere in your body. Since arteriosclerosis involves inflammation of the artery walls, elevated CRP levels can indicate that this inflammatory process is occurring, even before you have obvious symptoms.^[16]

An electrocardiogram, often abbreviated as ECG or EKG, is a quick and painless test that measures your heart’s electrical activity. During this test, small sticky patches with sensors attach to your chest and sometimes your arms or legs. These sensors connect to a machine that records how electrical signals move through your heart with each heartbeat. The test can reveal whether reduced blood flow to your heart muscle is affecting how your heart works. Changes in the pattern of electrical signals can indicate that arteriosclerosis in the coronary arteries (the vessels that feed your heart) is limiting oxygen delivery.^[16]

If your doctor suspects arteriosclerosis based on initial tests, you may need an exercise stress test. This test shows how your heart performs when it has to work harder. Normally, you’ll walk on a treadmill while wearing electrode patches connected to an ECG machine. The intensity gradually increases to get your heart rate up to about 85 percent of what’s normal for your age. If your health prevents you from walking, your doctor can use medication to make your heart beat faster instead. During the test, doctors watch for changes in your heart’s electrical pattern that suggest insufficient blood flow to the heart muscle. When you exercise and your heart muscle isn’t getting enough oxygen-rich blood, it starts contracting abnormally, which shows up on the ECG.^[11]

If the stress test shows problems, doctors may perform myocardial perfusion imaging, abbreviated as MPI. This test allows doctors to watch blood flow in and around your heart. It uses small amounts of radioactive material, called tracers, which travel through your bloodstream and are picked up by special cameras. Areas of your heart receiving less blood show up differently on the images, helping doctors identify which arteries might be blocked.^[11]

A coronary calcium scan is a specialized type of computerized tomography that takes pictures of your heart’s arteries. This test can detect calcium deposits in the coronary arteries. Since calcium is a component of plaque, the amount of calcium seen on the scan provides a measure of plaque burden. More calcium suggests more plaque and greater risk of complications. This test is particularly useful because it can detect arteriosclerosis before you have any symptoms.^[16]

Doctors also use computed tomography, or CT scans, with special dye injected into your bloodstream. The dye makes your blood vessels show up clearly on the images, revealing spots where blood flow is restricted or blocked. This is another way of seeing where plaque has built up in your arteries.^[11]

If previous tests suggest significant blockages, your doctor may recommend an angiography. This is an imaging technique that provides very detailed pictures of your arteries. During the procedure, a thin, flexible tube called a catheter is inserted into an artery, usually in your groin or wrist, and guided to the arteries being examined. Dye is injected through the catheter, and X-ray images are taken as the dye moves through your blood vessels. This test, also called cardiac catheterization when performed on heart arteries, reveals exactly where and how severely arteries are narrowed or blocked by plaque buildup.^[11]

Ultrasound examinations use sound waves to create pictures of your blood vessels and show how blood flows through them. Different types of ultrasound tests examine different areas. A carotid ultrasound or carotid Doppler looks at the arteries in your neck that supply blood to your brain, checking for plaque buildup that could lead to stroke. Arterial blood flow studies, sometimes called segmental Doppler pressures, examine blood flow in your legs to detect peripheral artery disease. These tests are painless and don’t use radiation, making them safe and comfortable for patients.^[16]

For checking blood pressure in your ankles and comparing it to the pressure in your arms, doctors use a test called the ankle-brachial index or ABI. If the blood pressure in your ankles is significantly lower than in your arms, it suggests that arteries in your legs are narrowed or blocked. This simple test can detect peripheral artery disease even before symptoms develop.^[2]

Diagnostic Testing for Clinical Trial Participation

When researchers conduct clinical trials to test new treatments for arteriosclerosis, they need to carefully select participants who meet specific criteria. This ensures the trial can accurately measure whether a new treatment works and is safe. The diagnostic tests used to determine if someone qualifies for a clinical trial are often similar to those used in regular medical practice, but the requirements may be more specific or stricter.

Clinical trials typically require a confirmed diagnosis of arteriosclerosis through standard diagnostic methods. This often means participants must have documented evidence from tests like angiography showing exactly where and how severely their arteries are blocked. Researchers need this precise information to understand the starting point of disease in each participant, which allows them to measure whether the experimental treatment makes the condition better, worse, or stays the same.^[12]

Blood tests showing cholesterol levels are almost always required for clinical trials studying arteriosclerosis treatments. Researchers typically want to know your LDL cholesterol, HDL cholesterol, triglycerides, and total cholesterol levels before you begin any experimental treatment. Some trials specifically target people with very high cholesterol levels, while others may include people across a range of cholesterol measurements. The trial protocol—the detailed plan describing how the research will be conducted—specifies exactly what cholesterol levels participants must have to qualify.^[12]

Many clinical trials also require imaging tests to measure the amount of plaque in your arteries. A coronary calcium scan might be used to calculate a calcium score, which estimates your plaque burden. Some trials need participants to have a certain minimum calcium score, meaning they must have at least some plaque buildup to qualify. Other trials might specifically seek people whose calcium scores fall within a particular range. This careful selection helps researchers create study groups that are similar enough to make valid comparisons between those receiving the experimental treatment and those receiving a placebo or standard treatment.^[12]

Imaging tests that measure the thickness of artery walls or the diameter of the opening inside arteries are also common requirements. For example, ultrasound measurements of the carotid arteries in your neck can show how thick the artery walls have become due to plaque. Trials studying whether a treatment can reverse or slow arteriosclerosis often use these measurements as a starting point, then repeat them during and after the trial to see if the treatment causes changes.^[12]

Some clinical trials require specialized tests that aren’t part of routine medical care. These might include advanced imaging techniques that can look at plaque composition—not just how big the plaque is, but what it’s made of. This matters because soft, fatty plaques are more likely to rupture and cause heart attacks or strokes than hard, calcified plaques. Researchers testing treatments that might stabilize dangerous plaques need these sophisticated tests to measure subtle changes that standard tests might miss.

Beyond tests that measure arteriosclerosis itself, clinical trials usually require comprehensive health assessments to ensure participant safety. This typically includes a complete medical history, physical examination, blood tests checking kidney and liver function, and documentation of any other medical conditions you have. Trials exclude people with certain health problems that might make the experimental treatment unsafe or might interfere with measuring whether the treatment works. For instance, if you have severe kidney disease, you might not qualify for a trial testing a medication that’s processed by the kidneys.

Trials also commonly require documentation of risk factors through blood tests and measurements. This includes blood sugar tests to check for diabetes, blood pressure measurements taken multiple times to confirm hypertension, and sometimes tests measuring inflammatory markers in your blood. Having complete information about all participants’ risk factors helps researchers understand who benefits most from the treatment being tested.

Before enrolling in any clinical trial, potential participants undergo a screening period where all required diagnostic tests are performed. This screening ensures you meet all the inclusion criteria (characteristics you must have to participate) and none of the exclusion criteria (characteristics that would prevent you from participating). The screening process protects both the scientific validity of the research and your personal safety as a participant.