angina CT scan preparation
Informed by recognized medical guidance
Overview
A CT scan for angina (also called a CT coronary angiogram) is a painless scan that uses X-rays to take detailed pictures of the blood vessels that supply your heart. It helps doctors see if any of these arteries are narrowed or blocked, which can cause chest pain known as angina.
Key facts
- The scan takes about 10 to 15 minutes, though the whole appointment may take an hour.
- You may be asked to avoid eating or drinking anything for a few hours before the scan.
- A special dye (contrast) is usually injected into a vein to make your arteries show up clearly on the images.
This type of CT scan is a common test for people with chest pain that might be angina. It is available at most hospitals and imaging centres.
It is typically used for adults who have symptoms like chest tightness or shortness of breath that could be due to narrowed heart arteries. Your doctor will decide if this scan is right for you.
Symptoms
- Chest pain that lasts more than a few minutes and does not go away with rest
- Chest pain with nausea, sweating, or feeling dizzy
- Pain that spreads to your arms, back, neck, jaw, or stomach
- Sudden shortness of breath or collapse
- ⚠New or worsening chest pain that comes on with less activity than before
- ⚠Chest pain that happens at rest or wakes you up
- ⚠Pain that does not improve after resting or using prescribed medication (like a spray or tablet given by your doctor)
Common symptoms
- Chest pain or discomfort (often described as pressure, squeezing, or tightness)
- Pain that spreads to your arms, neck, jaw, or back
- Shortness of breath
- Feeling very tired during activity
Symptoms in children
- Angina is very rare in children, but if it occurs, symptoms may include chest pain with exercise, pale skin, or rapid breathing.
Symptoms in older adults
- Chest pain may be less obvious. Instead, they may feel breathless, weak, or just ‘not right’ during activity.
- Pain may be felt in the upper back, shoulders, or stomach rather than the chest.
Causes
Main causes
- Angina is usually caused by a build-up of fatty deposits (plaque) inside the coronary arteries, which narrows them and reduces blood flow to the heart muscle.
- A temporary spasm of the artery can also cause angina.
Risk factors
- High blood pressure
- High cholesterol
- Smoking
- Diabetes
- Being overweight or inactive
- Having a family history of heart disease
- Older age (over 45 for men, over 55 for women)
When to see a doctor
See a doctor urgently if:
- If you have chest pain that is new, severe, or happens at rest, seek same-day medical attention or call your local emergency number.
Book a routine appointment if:
- If you have mild chest pain that only happens when you exercise and goes away with rest, see your GP (family doctor) within a few days.
Diagnosis
The diagnosis of angina begins with your doctor listening to your symptoms and checking your heart. They may then refer you for a CT coronary angiogram to look at your arteries.
Tests that may be done
- CT coronary angiogram (the scan itself)
- Electrocardiogram (ECG) – a recording of your heart’s electrical activity
- Blood tests to check for heart damage or risk factors like cholesterol
- A stress test (sometimes done before the CT scan)
What to expect at your appointment
Before the scan: You may be asked to avoid caffeine (coffee, tea, energy drinks) and not to eat for a few hours. Tell your doctor about any medicines you take, especially for diabetes or erectile dysfunction. On the day, you will change into a hospital gown and lie on a table. A small needle will be placed in your arm for the dye. The table will move slowly inside a large, doughnut-shaped scanner. You will need to hold your breath several times for 10–15 seconds while the pictures are taken. It is painless, but you may feel a warm flush from the dye.
Treatment
Treatment for angina depends on how narrow your arteries are. It includes lifestyle changes, medication, and sometimes procedures to improve blood flow. Your doctor will create a plan based on your test results.
Self-care at home
- Stop smoking – it greatly reduces risk of heart attacks.
- Eat a heart-healthy diet with plenty of fruits, vegetables, and whole grains.
- Be active – aim for at least 30 minutes of moderate exercise most days.
- Manage stress with relaxation techniques like deep breathing or meditation.
- Keep a healthy weight and control blood pressure and cholesterol.
Medical treatments
Your doctor may prescribe medicines to lower cholesterol, control blood pressure, prevent blood clots, or relax your arteries. You may also get a spray or tablet to use when chest pain starts. Always take medicines exactly as prescribed.
When is surgery considered?
If your arteries are severely narrowed, you may need a procedure to open them. This can be a stent (a small mesh tube placed inside the artery) or coronary artery bypass surgery. Your cardiologist will discuss the best option for you.
Living with this condition
Living with angina means being aware of your symptoms and knowing what triggers them. Carry your angina spray or tablets with you. Plan activities at a steady pace and rest when needed. Most people can still work, enjoy hobbies, and travel safely.
Lifestyle tips
- Take your medicines every day, even if you feel fine.
- Learn to recognise early warning signs and rest before pain becomes severe.
- Keep a diary of symptoms to share with your doctor.
- Avoid large meals, very cold weather, and sudden heavy exertion.
Diet and exercise
A heart-friendly diet includes oily fish (like salmon), nuts, oats, and plenty of colourful vegetables. Reduce salt, sugar, and saturated fats. Exercise such as walking, cycling, or swimming helps improve blood flow – talk to your doctor about a safe plan for you.
Mental health and emotional wellbeing
Having angina can cause anxiety or low mood. It is normal to worry about your heart. Talk to your doctor or a counsellor. Support groups where you can share experiences with others can also help.
Prevention
You cannot always prevent angina, but you can lower your risk by not smoking, eating well, exercising, and keeping blood pressure and cholesterol in check.
Screening programmes
If you have risk factors, your doctor may check your blood pressure and cholesterol regularly. The CT scan is not a routine screening test – it is used when you have symptoms.
Complications
If left untreated
- Angina may progress to a heart attack if blockages worsen.
- It can also lead to an irregular heartbeat (arrhythmia) or heart failure.
Long-term outlook
With proper treatment and lifestyle changes, most people with angina can lead a full and active life. The CT scan helps doctors find problems early, which greatly improves your chances of staying well.
Find support
External links open third-party websites. Ruqelo Health is not responsible for external content. Listing an organisation does not imply endorsement.
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.
Related conditions
Sources and guidance
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 27, 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.