16824 Calcium Score Screening Heart Scan

Overview

A calcium score heart scan is a quick, painless type of CT scan (a special X-ray machine that builds detailed pictures of the inside of your body). It looks at the arteries that supply blood to your heart and measures tiny specks of calcium in their walls. Calcium builds up inside fatty plaque, the greasy deposits that narrow and stiffen arteries over time. So the amount of calcium seen gives your doctor an estimate of how much plaque you have. The result is a number — your calcium score. Score zero means no calcium was seen. Higher numbers mean more plaque. It is a risk estimate, not a diagnosis, and it does not show whether an artery is actually narrowed or blocked.

Calcium scoring is widely used in many countries and is becoming more common. It is not a routine test for everyone, though. Doctors usually offer it to a selected group of people — mostly adults at medium risk of heart disease — because that is where the result is most likely to be useful.

It is used in adults, most often between about 40 and 75 years old. It tends to be more relevant for men over about 45 and women over about 55, and for people with a family history of early heart disease, high blood pressure, diabetes, high cholesterol, or a smoking history. It is not used in children, because calcium in the heart arteries almost never develops at that age.

Symptoms

Common symptoms

• The scan itself causes no symptoms at all — you will not feel anything during or after it.
• The plaque the scan looks for often causes no symptoms for many years, which is exactly why a screening scan is sometimes used.
• Some people have the scan because of symptoms such as chest discomfort on exertion, unusual breathlessness, or a strong family history — those symptoms need their own assessment, separate from the scan.

Symptoms in children

• Calcium scoring is not used in children.
• Calcium in the heart arteries is extremely rare in childhood. When it does occur, it is usually linked to an inherited cholesterol condition, and a specialist would guide testing.

Symptoms in older adults

• Calcium becomes more common with age, so higher scores are normal-er in older adults and need to be read in the context of your age.
• A score of zero is more reassuring in a younger person than in someone in their seventies.
• Older adults often have other conditions that matter as much as the score, such as kidney disease, diabetes or high blood pressure.

Causes

Main causes

• The calcium the scan detects is part of atherosclerosis — the slow build-up of fatty plaque inside arteries that happens over decades.
• As plaque ages, the body deposits calcium in it, a bit like scar tissue hardening. That calcium is what the scanner picks up.
• Some calcium in the heart arteries can also be linked to kidney disease, which changes how the body handles calcium and phosphate.

Risk factors

• Smoking, or a history of smoking
• High levels of LDL cholesterol (the 'bad' cholesterol) or low levels of HDL cholesterol
• High blood pressure
• Type 1 or type 2 diabetes
• A family history of heart attack or heart disease at a young age (for example, a parent or sibling affected before about 55 in men or 65 in women)
• Being overweight, especially around the waist
• Being physically inactive
• A diet high in processed foods, salt and saturated fat
• Older age and being male
• Long-term kidney disease
• Some inflammatory conditions such as rheumatoid arthritis or lupus, which raise heart risk

When to see a doctor

See a doctor urgently if:

• Any chest pain or pressure that is new, severe, or happening at rest — call emergency services rather than waiting
• Breathlessness that comes on suddenly or is much worse than usual
• Fainting or near-fainting
• A heartbeat that feels very fast or irregular and does not settle

Book a routine appointment if:

• You want to know your heart risk and are thinking about a calcium score
• A close relative had a heart attack or needed heart treatment at a young age
• You have several risk factors such as high blood pressure, diabetes, high cholesterol or a smoking history
• You and your doctor are unsure whether cholesterol-lowering treatment is worthwhile for you
• You have had a calcium score and want help understanding what the number means for you

Diagnosis

The calcium score is not a diagnosis of a condition — it is a test that estimates your risk of heart disease. Your doctor starts by talking with you about your history, checking your blood pressure, and arranging blood tests. If your overall risk is in the middle range, a calcium score can help sharpen the picture. The scan itself uses a CT scanner. You lie on a bed that slides into a ring-shaped machine, sticky patches may be placed on your chest to track your heartbeat, and you hold your breath for a few seconds while pictures are taken. It takes about 10 to 15 minutes in total, and you can go home straight afterwards.

Tests that may be done

• Coronary artery calcium score (the heart scan itself)
• Blood pressure measurement
• Blood tests for cholesterol and other fats
• Blood sugar or HbA1c to check for diabetes
• Kidney function tests
• A risk calculator that combines your age, sex, blood pressure, cholesterol, smoking status and other factors
• An ECG (a tracing of your heart's electrical activity) if you have symptoms
• Further tests such as a stress test or a CT angiogram (a scan using dye to look inside the arteries) only if symptoms or results suggest a blockage

What to expect at your appointment

You do not usually need to fast or change any medicines for a calcium score, though you should follow whatever instructions the scanning centre gives you. You will be asked to avoid caffeine for a few hours beforehand in some centres, because it can affect your heartbeat. The scan is silent and painless. Your result is usually a number with a short report, often grouped into bands such as zero, low, moderate or high. Your doctor will explain what your number means alongside your age and other risk factors, and discuss whether any treatment changes are worth considering.

Treatment

The scan does not treat anything — its job is to give you and your doctor better information. What follows depends on your score and your overall picture. A score of zero in someone at medium risk often means treatment can be delayed or avoided for now. A high score usually prompts a closer look at lifestyle and, in many cases, cholesterol-lowering treatment. Either way, the good news is that heart risk is something you can actively influence.

Self-care at home

• If you smoke, stopping is the single most powerful thing you can do for your heart — ask your doctor or pharmacist about support to quit
• Aim for regular activity you enjoy, building up gradually — a brisk walk most days is a great start
• Eat more vegetables, fruit, beans, whole grains, nuts and oily fish, and less processed food, salt and saturated fat
• Keep alcohol within recommended limits
• Try to reach and stay at a healthy weight, especially around the waist
• Get enough sleep and find ways to manage stress
• Know your numbers — blood pressure, cholesterol and blood sugar — and keep your routine checks up to date

Medical treatments

There is no medicine that removes calcium from your arteries. Instead, treatment aims to slow plaque build-up and lower your chance of a heart attack or stroke. Depending on your score and overall risk, your doctor may discuss medicines that lower cholesterol, medicines that lower blood pressure, and in some cases a small daily dose of a medicine that makes the blood less likely to clot. Whether any of these are right for you depends on your full picture, including your age, other conditions and personal preferences. Your doctor or pharmacist can explain the benefits and downsides so you can decide together.

When is surgery considered?

Surgery is not part of calcium score screening. A procedure such as a stent (a small mesh tube that holds an artery open) or bypass surgery is only considered if further tests show a significant blockage and you have symptoms or a high-risk pattern — which is a separate situation from having a screening scan.

Living with this condition

Life after a calcium scan is usually no different day to day. Most people carry on exactly as before. What changes is what you know — and that can be used to make small, steady improvements. If your score is high, your doctor may suggest a follow-up appointment to review treatment and risk factors. You do not usually need repeat scans; in most cases a calcium score is a one-off piece of information.

Lifestyle tips

• Stay smoke-free — avoid second-hand smoke too
• Move more: aim for something active most days, and add some strength work twice a week if you can
• Build meals around plants, whole grains, beans and fish, with olive or rapeseed oil instead of butter and processed fats
• Cut back on salty and heavily processed foods
• Watch your waistline as well as your weight
• Limit alcohol and avoid heavy drinking sessions
• Protect your sleep and make time to relax
• Keep up with blood pressure, cholesterol and diabetes checks

Diet and exercise

A heart-friendly way of eating is not about strict rules. Think Mediterranean-style: plenty of vegetables and fruit, beans and lentils, wholegrain bread, rice and pasta, nuts, and oily fish a couple of times a week. Use unsaturated oils, and go easy on processed meats, pastries, salty snacks and sugary drinks. For exercise, the goal is roughly 150 minutes a week of moderate activity — enough to make you a little warm and slightly out of breath but still able to talk. Start where you are, and build up slowly. If you have chest pain, dizziness or unusual breathlessness when you exercise, stop and get medical advice.

Mental health and emotional wellbeing

Being told you have a high calcium score can be unsettling, and it is normal to feel anxious or to start worrying about every twinge. Some people feel relieved instead — a zero score can be genuinely reassuring. Both reactions are common. Try not to treat the number as a prediction of your future. It is one piece of information among many, and it is information you can act on. If worry is affecting your sleep, mood or daily life, please tell your doctor — support is available, and talking it through often helps a great deal.

Prevention

You cannot prevent the need for a scan, and you cannot undo calcium that is already there. What you can do is lower your chance of heart disease — and that is largely within your control. Not smoking, keeping blood pressure and cholesterol in a healthy range, staying active and eating well reduce risk at any age, even after plaque has started to form.

Screening programmes

A calcium score is itself a type of screening test, but it is not recommended for everyone. It is generally most useful for adults at medium risk of heart disease, where the result could change a treatment decision. It is usually not recommended for people who already have heart disease, who have symptoms needing investigation, or who are at very low or very high risk. In the UK, the NHS does not routinely offer calcium scoring; it is sometimes available through specialist referral or private clinics. If you are interested, ask your doctor whether it would genuinely change anything for you — that is the key question.

Complications

If left untreated

• Plaque can keep building, narrowing the heart arteries and causing angina — chest discomfort on effort that eases with rest
• A plaque can suddenly rupture, causing a clot that blocks an artery and leads to a heart attack
• Long-term reduced blood flow can weaken the heart muscle and lead to heart failure
• The same artery disease process increases the risk of stroke and other circulation problems
• Kidney disease, diabetes and high blood pressure can speed all of this up if not managed

Long-term outlook

The outlook is genuinely encouraging. Heart disease is not a switch that flips overnight — it develops over decades, which means there is almost always time to act. Many people with a raised calcium score make changes, start appropriate treatment, and go on to live long, active lives without ever having a heart event. Your score is a starting point for a conversation, not a verdict. Small, steady changes made over months and years add up to a real difference.

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