Blocked arteries can develop quietly over many years. You may feel completely well while cholesterol and other substances gradually build up inside the artery walls. For some people, the first noticeable problem is chest discomfort or shortness of breath. For others, cardiovascular disease may only become apparent after a more serious event.
This is why understanding your personal risk matters. High cholesterol, diabetes, high blood pressure, smoking, and family history can all increase the likelihood of cardiovascular disease. Depending on your symptoms and risk factors, doctors may use blood tests, ECG, vascular ultrasound, or more advanced imaging such as coronary CT angiography to investigate further.
The goal is not to scan everyone for blocked arteries. It is to identify your risk, recognise warning signs, and choose the right test when there is a medical reason to investigate.
When people talk about “blocked arteries,” they are usually referring to arteries that have become narrowed because of atherosclerosis. Atherosclerosis develops when plaque builds up inside the artery walls. This plaque may contain cholesterol, fats, calcium, and other substances. Over time, the artery can become narrower and blood may have more difficulty flowing through it.
The effect depends on which arteries are involved. If the coronary arteries supplying the heart are affected, it can contribute to coronary artery disease. If arteries supplying the brain or limbs are affected, the symptoms and complications may be different.
An artery does not have to be completely blocked to cause problems. Significant narrowing may already reduce blood flow, particularly when the body needs more oxygen during physical activity.
One reason cardiovascular disease can be difficult to recognise is that plaque buildup usually happens gradually. During the early stages, there may still be enough space inside an artery for blood to flow normally. As a result, you might not experience obvious symptoms. Symptoms may become noticeable when narrowing progresses or when the heart needs more oxygen, such as during exercise.
Possible warning symptoms include:
Not everyone experiences heart problems in the same way. Some cardiovascular events may cause mild or less obvious symptoms.
Related Reading: Some heart attacks may occur without the classic severe chest pain people expect. Learn about the possible silent heart attack symptoms and warning signs and why unusual symptoms should not automatically be dismissed.
New or severe chest pain, difficulty breathing, fainting, cold sweating, or other symptoms that could indicate a heart attack require immediate emergency medical attention.
Cardiovascular disease usually does not have one single cause. Instead, several factors may contribute to the gradual development of atherosclerosis.
Common risk factors include:
Having one risk factor does not necessarily mean you have blocked arteries. However, the combination of several risk factors can increase your overall cardiovascular risk.
Cholesterol itself is essential for normal body function. The problem develops when certain types of cholesterol, particularly LDL cholesterol, remain elevated and contribute to plaque formation in artery walls.
Over time, plaque can cause arteries to become narrower and less flexible. High cholesterol is therefore an important modifiable cardiovascular risk factor.
The difficulty is that high cholesterol usually causes no obvious symptoms. A person may have elevated cholesterol for years without knowing it unless they have a blood test.
A lipid profile typically measures:
These results are interpreted together with factors such as age, blood pressure, diabetes, smoking status, family history, and existing cardiovascular disease.
Related Reading: If your cholesterol result is high or borderline, read What Are the Risks of High Cholesterol? to understand how cholesterol can affect your heart and blood vessels.
There is no single test that tells doctors everything about your cardiovascular health.
Assessment usually begins with your medical history and overall risk profile. Your doctor may ask about:
Based on this information, further tests may be recommended.
Blood tests can help identify important cardiovascular risk factors but do not directly show whether an artery is blocked.
Common tests may include:
These results help your doctor build a clearer picture of your overall cardiovascular risk.
Blood tests provide valuable insights into your overall health, but interpreting the results can sometimes be confusing. Read How to Read a Blood Test Report: A Complete Guide to Understanding Your Results for a detailed explanation.
An electrocardiogram, or ECG, records the electrical activity of your heart.
It can help doctors assess heart rhythm and identify certain abnormalities. In some situations, it may show changes associated with reduced blood flow or previous heart damage.
However, an ECG does not produce an image of the coronary arteries. A normal ECG therefore does not automatically rule out coronary artery disease.
To understand how an ECG works and what your results may mean, read Electrocardiogram (ECG) Explained: Uses, Procedure, Results & Heart Health Guide.
If you’re planning to book an ECG, it’s helpful to understand the expected pricing. Learn more in How Much Does an ECG Test Cost in Dubai.
Ultrasound can be extremely useful when doctors need to evaluate certain blood vessels.
A vascular Doppler ultrasound uses sound waves to assess the structure of blood vessels as well as the speed and direction of blood flow. It can help identify narrowed arteries, reduced circulation, and blood clots in appropriate parts of the body. MVR notes that vascular ultrasound is commonly used to assess vessels including the carotid arteries and arteries of the upper and lower limbs
Vascular ultrasound may be considered when a person experiences symptoms such as:
It is important to understand that a routine vascular Doppler scan is not the same as imaging the coronary arteries of the heart.
Related Reading: If you have symptoms of poor circulation or your doctor has recommended a Doppler study, read our detailed guide to vascular ultrasound for blocked arteries and poor circulation.
When doctors specifically need detailed images of the coronary arteries, one possible investigation is coronary CT angiography, commonly called CCTA.
CCTA is a non-invasive CT examination that uses contrast material to create detailed images of the blood vessels supplying the heart.
It can help doctors assess:
CCTA is not automatically required simply because someone has high cholesterol or a family history of heart disease. The decision depends on symptoms, cardiovascular risk, previous test results, and clinical assessment.
If your doctor has recommended a coronary CT angiography scan, following the correct preparation steps can help ensure accurate results. Learn more in CT Angio Preparation Guidelines Before Your Scan.
Before the scan, the healthcare team will review whether CCTA is appropriate for you.
You may be asked about:
During the examination, ECG electrodes are typically placed on the chest to help synchronise image acquisition with the heartbeat.
Contrast material is administered through an IV line to make the coronary arteries visible. Depending on the patient’s condition and imaging protocol, medication may sometimes be given to optimise the heart rate or improve visualisation.
During scanning, you will need to remain still and may be asked to hold your breath briefly.
The images are then reviewed by an appropriately trained physician.
No. This is an important distinction.
|
Coronary CT Angiography |
Invasive Coronary Angiography |
|
Non-invasive imaging examination |
Catheter-based procedure |
|
CT scanner is used |
A catheter is guided through an artery |
|
Contrast is given through an IV |
Contrast is delivered through a catheter |
|
Used to assess coronary anatomy and narrowing |
Used to directly assess coronary arteries |
|
Does not place a stent |
Angioplasty or stenting may sometimes be performed |
A coronary CT angiogram is primarily a diagnostic imaging test.
If significant narrowing is identified, your doctor may recommend further assessment. Invasive coronary angiography may then be considered depending on the findings and your symptoms.
You do not necessarily need to wait until severe symptoms develop before discussing cardiovascular risk with your doctor.
Assessment may be particularly relevant if you have:
The appropriate assessment is different for every patient.
Some people may only need blood pressure checks, cholesterol testing, and lifestyle guidance. Others may require ECG or additional cardiac testing. Vascular ultrasound may be useful when peripheral or carotid artery disease is suspected, while CCTA may be considered when doctors need detailed assessment of the coronary arteries.
Finding plaque does not automatically mean you need surgery or a stent.
Your doctor will consider several factors, including:
Depending on the findings, the next steps may include lifestyle changes, cholesterol or blood pressure management, medications prescribed by your doctor, further cardiac testing, cardiology referral, or invasive coronary angiography.
The important point is that the result should be interpreted as part of your overall cardiovascular picture, not as an isolated scan finding.
You cannot always feel high cholesterol, high blood pressure, or the early stages of artery disease. That makes routine cardiovascular risk assessment especially valuable for people with known risk factors.
Knowing your cholesterol, blood sugar, and blood pressure levels gives you and your doctor useful information about where your risk stands. When symptoms or clinical findings suggest a circulation problem, appropriate diagnostic imaging can provide additional answers.
If your doctor recommends vascular ultrasound or CT imaging as part of your assessment, MVR Diagnostic Clinic provides diagnostic imaging services in Dubai with experienced healthcare professionals and modern imaging technology.
If you are experiencing severe or new chest pain, significant shortness of breath, fainting, sweating, or symptoms suggestive of a heart attack, seek emergency medical care immediately rather than waiting for a routine diagnostic appointment.
How do I know if I have blocked arteries?
You cannot reliably determine this from symptoms alone. Some people develop symptoms such as chest discomfort or shortness of breath, while others have few symptoms. Doctors assess your risk factors and choose appropriate tests when necessary.
Can high cholesterol mean my arteries are blocked?
High cholesterol increases the risk of plaque buildup, but a high cholesterol result does not prove that an artery is already blocked. Your overall cardiovascular risk needs to be assessed.
Can a blood test detect blocked arteries?
No. Blood tests can identify risk factors such as high cholesterol and diabetes, but they cannot directly show the inside of an artery.
Can vascular ultrasound show blocked arteries?
Vascular Doppler ultrasound can detect narrowing and blood-flow abnormalities in certain arteries, including vessels in the neck and limbsIt is not a direct substitute for coronary artery imaging.
What test can check the coronary arteries?
Depending on the clinical situation, doctors may use coronary CT angiography or invasive coronary angiography to assess coronary artery narrowing.
Should I get screened if heart disease runs in my family?
A strong family history can increase cardiovascular risk. Discussing your blood pressure, cholesterol, blood sugar, lifestyle, and other risk factors with your doctor can help determine whether additional testing is appropriate.
Does finding plaque mean I will need a stent?
No. Treatment depends on the severity and location of disease, your symptoms, and your overall clinical assessment. Some people are managed with risk-factor modification and medication, while others require additional procedures.
Is vascular ultrasound painful?
Vascular ultrasound is generally painless and does not use ionising radiation. It uses sound waves to examine blood vessels and blood flow.