Chest pain can have many causes, and a cardiologist chooses tests according to your symptoms, medical history and how urgently you need to be assessed. If you are wondering what tests does a cardiologist do for chest pain, common investigations include an electrocardiogram (ECG), blood tests and, when appropriate, imaging such as a CT coronary angiogram or echocardiogram. Not everyone needs every test. For an overview of the consultation itself, read our guide to chest pain assessment with a London cardiologist.
This guide explains the usual steps, what each investigation can show and how urgent symptoms differ from chest pain that is assessed in a planned appointment. It is general information, not a diagnosis or a substitute for medical advice. The choice of investigation depends on your symptoms and history; read more about choosing the right cardiology test.
First: know when chest pain is an emergency
Call 999 for severe or persistent chest pain, particularly if it feels tight, heavy or squeezing, spreads to your arm, jaw, back or neck, or comes with breathlessness, sweating, nausea, faintness or collapse. Do not drive yourself to hospital. New or worsening symptoms may also need urgent assessment even if they do not match this description exactly. To learn more about one possible investigation, see our guide to when an echocardiogram may help with chest pain.
Emergency assessment and a planned cardiology consultation are different pathways. If a heart attack is suspected, clinicians may perform an ECG and blood tests promptly, then repeat some tests to look for changes over time. A routine clinic appointment is not a safe alternative to emergency care when symptoms are acute. For a broader overview of investigations, see our guide to cardiology tests available privately in London.
What happens at a cardiology consultation?
Testing usually starts with a conversation and examination. Your cardiologist may ask when the pain began, where you feel it, how long it lasts, what brings it on or relieves it, and whether it occurs with exertion or at rest. You may also be asked about breathlessness, palpitations, dizziness, previous heart conditions, medicines, smoking and family history.
A physical assessment may include checking your pulse and blood pressure and listening to your heart and lungs. These details help the cardiologist decide which investigations are useful. Chest discomfort can arise from heart, lung, digestive, muscle or other causes, so a heart test is only one part of working out what is happening.
Common tests for chest pain
1. Electrocardiogram (ECG)
An ECG records the heart’s electrical activity using small sensors placed on your chest and limbs. It is quick and painless, and can show certain rhythm problems or changes that may suggest reduced blood supply or previous heart damage.
An ECG is a snapshot. A normal result does not rule out every heart problem, particularly if symptoms come and go or are not happening during the recording. Your cardiologist will interpret it alongside your symptoms and any other findings.
2. Blood tests
Blood tests may be used to look for signs of heart muscle injury, check general health or assess factors relevant to cardiovascular risk. In an emergency, a test called troponin can help identify heart muscle damage. It may need to be repeated because the result can depend on when the sample is taken in relation to the symptoms.
Blood tests alone do not explain every episode of chest pain. Your clinician will consider the results together with your history, ECG and, if needed, scans or other investigations.
3. Echocardiogram
An echocardiogram is an ultrasound scan of the heart. It shows the heart’s structure and how well it pumps, and can assess the heart valves. It does not directly show every narrowing in the coronary arteries, but it can help investigate other possible explanations for symptoms and provide useful information about heart function.
For a standard echocardiogram, a sonographer or clinician moves a probe over your chest. The scan is usually painless and does not use X-rays.
4. CT coronary angiogram
A CT coronary angiogram (CTCA) uses a CT scanner and contrast dye to create images of the arteries supplying the heart. It can help assess whether coronary artery disease may be causing symptoms. For some people with suspected stable angina, a CTCA may be considered as an initial imaging test; the right choice depends on individual circumstances and local clinical guidance.
You may be asked to follow instructions about food, drink or medicines beforehand. The team will check whether contrast dye is suitable for you, including asking about allergies and kidney health. Follow the specific instructions given by the clinic or imaging department rather than changing medication yourself.
5. Stress testing or stress imaging
Some tests assess how the heart responds when it works harder. This may involve monitored exercise or medication that simulates the effects of exercise, combined with imaging such as an echocardiogram or nuclear scan. The type of test depends on your health, mobility and the question your cardiologist needs to answer.
A treadmill ECG is not the right test for everyone and is not used as the sole test in every chest-pain assessment. Your cardiologist will explain why a particular form of stress testing is—or is not—appropriate.
6. Invasive coronary angiography
Invasive coronary angiography uses a thin catheter, usually inserted through an artery in the wrist or groin, to take X-ray images of the coronary arteries after contrast dye is injected. It can show artery narrowings in detail and may be recommended when symptoms or earlier test results make a closer assessment necessary.
It is different from a CT scan and involves an invasive procedure, so the team will discuss its potential benefits, risks and alternatives with you. If a significant narrowing is found, treatment options may include medication or, in selected cases, angioplasty and stenting. A procedure is not automatic: the recommendation depends on your findings and circumstances.
Other investigations, when relevant
If symptoms include a racing or irregular heartbeat, a portable ECG monitor may record your rhythm over a longer period than a clinic ECG. Other tests, such as a chest X-ray or cardiac MRI, may be considered when the clinical picture suggests they could help. They are not required for every person with chest pain.
How does a cardiologist choose the right test?
There is no single test that answers every question. The decision may take account of whether pain is new or longstanding, whether it is linked to exertion, your examination and ECG, existing conditions, medicines, and the results of any previous investigations. The aim is to select tests that are relevant to your symptoms—not simply to perform as many tests as possible.
It can help to bring a list of medicines, details of when symptoms occur and copies of previous test results if you have them. Ask whether you need to prepare for the investigation, when you can expect results and whom to contact if your symptoms change. Instructions differ between tests, so check with the team before fasting or altering medication.
What can test results tell you?
Results may make a heart-related cause more or less likely, identify a problem that needs treatment, or indicate that another explanation should be considered. Sometimes an initial test is reassuring but does not fully explain recurring symptoms. Your cardiologist may then discuss whether a different investigation or follow-up is appropriate.
A result should be interpreted in context. If chest pain becomes severe, persistent or is accompanied by concerning symptoms, seek urgent help rather than waiting for a planned appointment or test result. Dr Chabok’s cardiology service lists clinics in London and Harefield for consultations and heart assessment; the appropriate route depends on your symptoms and urgency.
Frequently Asked Questions
What is usually the first test for chest pain?
An ECG is commonly one of the first tests, alongside a discussion of symptoms and a clinical examination. If a heart attack is suspected, urgent assessment may also include blood tests and repeat testing. The sequence depends on the situation.
Can an ECG show whether chest pain is caused by angina?
An ECG can show electrical changes that may be relevant, but a normal ECG does not rule out angina. The cardiologist may recommend other tests, such as a CT coronary angiogram or stress imaging, based on your symptoms and overall assessment.
Will I need a CT scan for chest pain?
Not necessarily. A CT coronary angiogram is one option for assessing the heart’s arteries, but it is not suitable or needed for everyone. Your cardiologist will consider your history, initial findings and the benefits and limitations of available tests.
Do I need to fast before cardiology tests?
Preparation varies. Some investigations may require specific instructions about food, drink or medicines, while others may not. Follow the instructions from your clinic or imaging department, and contact them if anything is unclear.
How long does it take to get chest pain test results?
Timing depends on the test and where it is performed. Some findings may be discussed soon after an investigation, while scans or monitoring may need further review. Ask the team when and how you will receive your results.
Frequently Asked Questions
What is usually the first test for chest pain?
An ECG is commonly one of the first tests, alongside a discussion of symptoms and a clinical examination. If a heart attack is suspected, urgent assessment may also include blood tests and repeat testing. The sequence depends on the situation.
Can an ECG show whether chest pain is caused by angina?
An ECG can show electrical changes that may be relevant, but a normal ECG does not rule out angina. The cardiologist may recommend other tests, such as a CT coronary angiogram or stress imaging, based on your symptoms and overall assessment.
Will I need a CT scan for chest pain?
Not necessarily. A CT coronary angiogram is one option for assessing the heart’s arteries, but it is not suitable or needed for everyone. Your cardiologist will consider your history, initial findings and the benefits and limitations of available tests.
Do I need to fast before cardiology tests?
Preparation varies. Some investigations may require specific instructions about food, drink or medicines, while others may not. Follow the instructions from your clinic or imaging department, and contact them if anything is unclear.
How long does it take to get chest pain test results?
Timing depends on the test and where it is performed. Some findings may be discussed soon after an investigation, while scans or monitoring may need further review. Ask the team when and how you will receive your results.