10 minute read
Medically reviewed by Dr Ravi Assomull, Consultant Cardiologist – 23 September 2026
Introduction
Many people feel perfectly well yet quietly wonder whether something could be happening with their heart that they cannot feel. It is a surprisingly common concern — and one that leads thousands of people in the UK to search for information about preventative cardiac screening every year.
The question of whether a heart scan with no symptoms is worthwhile is not straightforward. Cardiovascular disease remains one of the leading causes of death in the UK, and one of its most challenging characteristics is that it can develop gradually over many years without causing noticeable symptoms. Conditions such as high blood pressure, elevated cholesterol, and even the early stages of coronary artery disease can sometimes be entirely silent in their early stages.
This article explores why some people may consider cardiac imaging even in the absence of symptoms, which factors might make it a sensible conversation to have with a cardiologist, what heart scans typically involve, and how to think about the decision in a balanced, evidence-informed way.
Featured Snippet: Is It Worth Getting a Heart Scan If You Have No Symptoms?
Is it worth getting a heart scan if I have no symptoms?
A heart scan with no symptoms may be worth considering for certain individuals with elevated cardiovascular risk factors — such as a strong family history of heart disease, high cholesterol, or hypertension. Cardiac imaging can detect early changes not yet causing symptoms. Whether it is appropriate depends on your individual clinical circumstances, and a cardiologist can help assess this.
What Is a Heart Scan and What Can It Show?
The term "heart scan" can refer to several different types of cardiac imaging, each designed to assess different aspects of heart health. The most commonly discussed in a preventative context is the CT coronary angiogram (CTCA) or a coronary calcium score scan.
A coronary calcium score scan uses a low-dose CT to detect calcium deposits within the coronary arteries — the blood vessels that supply the heart muscle with oxygen-rich blood. These deposits are a marker of atherosclerosis, the gradual build-up of fatty plaques within artery walls. A higher calcium score suggests a greater degree of coronary artery disease may be present.
A CT coronary angiogram goes further, using contrast dye to produce detailed images of the coronary arteries, allowing a cardiologist to assess for narrowings or blockages that might reduce blood flow to the heart.
Other relevant cardiac imaging includes an echocardiogram, which uses ultrasound to assess the heart's structure and function, including how well the heart muscle is pumping and how the valves are working.
None of these scans are appropriate for every person, and their suitability depends on individual clinical factors. A cardiologist can advise which investigation, if any, would be most clinically relevant for a given individual.
How Does Coronary Artery Disease Develop Without Causing Symptoms?
Understanding how heart disease can remain silent for years helps to explain why some people consider cardiac screening even when feeling well.
The coronary arteries are the vessels that deliver a continuous supply of oxygenated blood to the heart muscle. Over time, a process called atherosclerosis can cause fatty deposits — known as plaques — to build up within the artery walls. This process can begin relatively early in adult life and progress gradually over decades, often without causing any noticeable discomfort.
Symptoms, such as chest tightness or breathlessness on exertion, often only become apparent once an artery has narrowed significantly enough to restrict blood flow, or if a plaque ruptures suddenly — which can trigger a heart attack.
This is one reason why cardiovascular risk assessment — rather than waiting for symptoms to appear — can be a valuable part of preventative healthcare for people at elevated risk. You can find out more about cardiovascular risk assessment and heart health services at our London cardiology practice.
Who Might Benefit From a Heart Scan Without Symptoms?
It is important to be clear that cardiac imaging is not recommended for everyone who feels well. However, certain groups of people may have a clinical conversation with their cardiologist about whether preventative screening is appropriate.
These may include people who:
- Have a strong family history of heart disease, particularly in first-degree relatives at a young age
- Have been told they have high cholesterol (hyperlipidaemia) and want to understand their actual arterial health
- Have hypertension (high blood pressure) that has been present for some time
- Are diabetic, as diabetes significantly elevates cardiovascular risk
- Are in a higher age group (typically men over 45 and women over 55) with additional risk factors
- Have had an inconclusive or borderline cardiovascular risk assessment and want further information to guide clinical decision-making
- Are considering starting vigorous exercise for the first time and have risk factors that may warrant screening
Being in one or more of these groups does not mean a scan is automatically appropriate. This is a decision best made jointly between a patient and their cardiologist, taking into account all relevant clinical information.
What Does a Cardiac Scan Typically Involve?
For those who do proceed with cardiac imaging, it is helpful to know what to expect.
A coronary calcium score scan is a relatively quick, non-invasive procedure. It involves lying still on a CT scanner table while images are taken of the chest. No injection or contrast dye is required, and the procedure typically takes around 10 to 15 minutes. There is a small radiation dose involved, which your cardiologist will factor into the risk-benefit discussion.
A CT coronary angiogram is also non-invasive but does involve the injection of a contrast dye through a vein in the arm. Some people are asked to take medication beforehand to slow the heart rate, which helps produce clearer images. The scan itself is brief, though the appointment will be longer to account for preparation and monitoring.
An echocardiogram uses no radiation and involves gel being applied to the chest while a probe produces ultrasound images of the heart. It involves no radiation, is generally well tolerated, and is widely used to assess cardiac structure and function.
What Could the Results Show?
Heart scan results can be reassuring, informative, or indicate that further investigation or treatment is warranted.
A low or zero coronary calcium score, for example, suggests minimal detectable calcification and may be associated with a lower short-term cardiovascular risk, though this should be interpreted alongside other clinical factors. A higher score indicates greater levels of calcium in the arteries and may prompt discussion about lifestyle changes, medication, or further assessment.
Results should always be interpreted by a qualified cardiologist in the context of a full clinical history. A scan finding should never be interpreted in isolation.
Supporting Your Heart Health Proactively
Whether or not a heart scan is appropriate for you, supporting cardiovascular health through lifestyle choices remains important for everyone.
Consistent evidence supports the following approaches as part of a heart-healthy lifestyle:
- Eating a balanced diet rich in vegetables, fruit, wholegrains, and healthy fats, while limiting saturated fat, salt, and ultra-processed foods
- Regular physical activity — current UK guidelines recommend at least 150 minutes of moderate activity per week
- Not smoking, which remains one of the strongest modifiable cardiovascular risk factors
- Keeping alcohol within recommended limits
- Managing weight in a way that supports long-term metabolic health
- Monitoring blood pressure and cholesterol regularly, particularly if you have known risk factors
- Managing stress and ensuring adequate sleep, both of which have meaningful effects on cardiovascular health
These measures cannot guarantee the prevention of heart disease — cardiovascular risk is influenced by many factors, including genetics and age — but consistent evidence supports them as an important foundation for long-term cardiovascular health.
When Should You See a Cardiologist?
Even without symptoms, certain situations may make it appropriate to seek a private cardiology consultation to discuss your heart health:
- A close family member was diagnosed with heart disease or had a heart attack at a young age
- You have been told your cholesterol or blood pressure is elevated and want specialist guidance
- You are uncertain about your cardiovascular risk despite previous NHS assessments
- You are planning a significant change in exercise habits and have relevant risk factors
- You want a thorough, personalised review of your cardiac health
If you do experience symptoms such as chest pain, significant breathlessness, palpitations, dizziness, or fainting, please do not wait for a routine appointment — seek prompt medical attention. If symptoms are severe or sudden, call 999 immediately.
Key Points to Remember
- A heart scan with no symptoms may be appropriate for certain individuals with elevated cardiovascular risk factors, but is not recommended for everyone
- Coronary artery disease can develop silently over many years before causing noticeable symptoms
- Cardiac imaging options include coronary calcium scoring, CT coronary angiography, and echocardiography, each assessing different aspects of heart health
- Results should always be interpreted by a cardiologist in the context of a full clinical history
- Lifestyle measures including a balanced diet, regular activity, not smoking, and managing blood pressure and cholesterol support long-term cardiovascular health
- Seek prompt medical attention for any unexplained chest pain, breathlessness, palpitations, or fainting
Frequently Asked Questions
Can I have heart disease if I feel completely well?
Yes, it is possible. Some forms of cardiovascular disease, including coronary artery disease and high blood pressure, can develop without causing noticeable symptoms in the early stages. This is why cardiovascular risk assessment and appropriate health checks are valuable, particularly for those with risk factors such as a family history of heart disease, elevated cholesterol, or hypertension. Feeling well does not always mean the heart and cardiovascular system are free from underlying changes.
Is a heart scan safe?
Most cardiac imaging procedures are considered safe when recommended appropriately. CT-based scans involve a small amount of radiation, which your cardiologist will discuss as part of the decision-making process. Echocardiograms use ultrasound and involve no radiation. The suitability and safety of any imaging procedure depends on individual circumstances, including medical history and any relevant contraindications, which a cardiologist will assess before recommending a scan.
How do I know if I am at high cardiovascular risk?
Cardiovascular risk is assessed by considering multiple factors, including age, sex, blood pressure, cholesterol levels, smoking status, body weight, family history, and the presence of conditions such as diabetes. Tools such as the QRISK score are used in the UK to estimate ten-year cardiovascular risk. A GP or cardiologist can assess your individual risk profile and advise whether further investigation or preventative treatment is appropriate.
What is a coronary calcium score and what does it mean?
A coronary calcium score is a measure of the amount of calcium detected in the coronary artery walls on a CT scan. Calcium deposits are a marker of atherosclerosis — the build-up of plaques within artery walls. A score of zero suggests minimal detectable calcification and may be associated with a lower short-term cardiovascular risk, though this should be interpreted alongside other clinical factors, while a higher score indicates greater plaque burden and may influence decisions about treatment or lifestyle change. Results are always reviewed in the context of the full clinical picture.
Do I need a referral to get a heart scan?
In a private cardiology setting, you may be able to self-refer for a consultation and discuss whether cardiac imaging is appropriate. However, cardiac imaging should not be undertaken without a proper clinical assessment first. A cardiologist will review your history, risk factors, and any relevant test results before recommending any specific scan, ensuring that any investigation is clinically appropriate and the results are properly interpreted.
How often should I have my heart health checked?
There is no single answer that applies to everyone. For people with known cardiovascular risk factors, more regular monitoring — including blood pressure and cholesterol checks — is generally advisable. For those without significant risk factors, routine health checks through NHS services may be sufficient. A cardiologist can provide personalised guidance based on your individual circumstances and risk profile.
Conclusion
The question of whether a heart scan with no symptoms is worthwhile is one that deserves a thoughtful, personalised answer rather than a blanket yes or no. For certain individuals — particularly those with elevated cardiovascular risk factors or a strong family history of heart disease — cardiac imaging can provide genuinely valuable information that supports clinical decision-making and peace of mind.
For others, reassurance may be better achieved through a thorough cardiovascular risk assessment, appropriate blood tests, and an honest discussion with a cardiologist about lifestyle and long-term heart health strategies.
What matters most is that decisions about cardiac screening are made with proper clinical guidance, not based on anxiety alone or on the assumption that a scan is always necessary or always unnecessary.
Cardiovascular symptoms, test results, and treatment options should always be assessed individually based on a person's clinical history, symptoms, and appropriate medical examination.
If you have concerns about your heart health — whether you have symptoms or not — speaking with a qualified cardiologist is always a sensible first step.
Disclaimer: This article is intended for general educational purposes only and does not constitute personalised medical advice, diagnosis, or treatment. Cardiovascular symptoms and conditions can vary between individuals. If you have concerns about your heart health or symptoms, seek appropriate advice from a qualified healthcare professional. If you experience symptoms that may indicate a medical emergency, seek urgent medical attention.
Next Review Due: 23 September 2027
