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A CT coronary calcium score is a special type of CT scan that takes pictures of your heart's arteries to measure the amount of calcium in them. Calcium in the arteries is a sign of plaque buildup, which can increase your risk of heart disease. The result is given as a number (Agatston score) that helps your doctor estimate your future heart risk.
Key facts
CT coronary calcium scoring is becoming more common as a screening test for people at intermediate risk of heart disease. It is not yet a routine test for everyone, but many doctors recommend it for patients with certain risk factors.
It is typically recommended for adults aged 40 to 75 who have risk factors such as high cholesterol, high blood pressure, diabetes, smoking, or a family history of early heart disease, and who do not already have known heart disease.
The CT coronary calcium score itself is the diagnostic test. A special CT scanner takes multiple images of your heart, and a computer calculates the amount of calcium in your coronary arteries.
You lie on a table that slides into the CT scanner. You may be asked to hold your breath for a few seconds while the images are taken. The scan is painless and takes about 10 to 15 minutes. You do not need to fast, but your doctor may ask you to avoid caffeine on the day of the scan.
There is no treatment for the calcium score itself. Instead, the score helps your doctor decide how aggressively to treat your heart disease risk. Treatment focuses on lowering your chances of a heart attack or stroke.
If you have a high calcium score, your daily life may involve being more careful about heart health. This can mean checking your blood pressure at home, taking your medications consistently, and paying attention to any new symptoms.
You cannot reverse the calcium already in your arteries, but you can prevent further buildup by managing your risk factors. A CT calcium score helps you know where you stand so you can take action early.
The CT coronary calcium score is itself a screening test. It is not recommended for everyone, but your doctor may suggest it if you have an intermediate risk of heart disease based on your age, blood pressure, cholesterol, and other factors.
Having a high calcium score does not mean a heart attack is certain. It is a warning sign that gives you a chance to act. Many people with high scores can greatly reduce their risk through lifestyle changes and medical care. With your doctor’s help, you can protect your heart and live a full, active life.
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Always verify with your doctor
Health guidelines vary by country and region. The information in this article is based on international clinical guidelines but may not reflect the specific guidelines, medications, or practices in your country. Always discuss your health concerns with your own doctor or healthcare provider, and refer to your local national health guidelines where available.
Important notice This information is for educational purposes only. It does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your specific situation. If you are experiencing a medical emergency, call your local emergency services immediately.
This article is educational and is prepared with reference to recognized health information and clinical guidance sources where available. Specific source links may vary by topic.
Last updated: July 16, 2026
Educational note: This information is for education only and is not a diagnosis.
Use it to support, not replace, advice from a licensed clinician.
If symptoms are severe, worsening, or urgent, call your local emergency number or seek emergency care.
Depending on your score and overall risk, your doctor may recommend medications to lower your cholesterol, blood pressure, or blood sugar. Treatments such as low-dose aspirin or other blood thinners may also be considered. Always follow your doctor's advice and take any prescribed medicines exactly as directed.
A high calcium score alone rarely requires surgery. However, if further tests show significant blockages, procedures such as angioplasty (opening a blocked artery with a balloon) or bypass surgery might be needed. Your doctor will discuss these options if they apply to you.
Aim for a balanced diet that includes plenty of vegetables, fruits, whole grains, and lean protein. Limit red meat, fried foods, and sugary drinks. For exercise, try to get at least 30 minutes of moderate activity most days. Even a brisk walk helps your heart.
Learning you have a high calcium score can be worrying. It is normal to feel anxious or stressed. Talk to your doctor about your concerns. If feelings of anxiety or depression persist, reach out to a mental health professional or a crisis helpline in your area.