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Tests for heart problems

If you have problems with your heart, several different tests can help to reveal what's causing them.

ECG (electrocardiogram)

ECG readoutThis is the most simplest test you can have. It records your heart activity while you're resting. Many people have an ECG for one reason or another, at their GP surgery, in a heart clinic or at hospital. It's also called a heart tracing.

An ECG is quick and painless – it takes about 20 minutes. A technician or nurse attaches sensors (electrodes) to your chest, arms and legs to record your heart activity. This is then printed as a graph that a doctor will analyse. If you have this test at a hospital, a cardiologist (heart specialist) will send a report to your GP within one or two days.

Exercise stress test

This is also sometimes called an exercise tolerance test. It's like an ECG, but it's done while you're exercising on a treadmill.

Holter monitor

A Holter monitor continuously records your heartbeat and rhythm over time (usually 24 hours). It shows how your heart reacts to your normal daily activities, not just while you're resting. It's simple and painless.

For this test, electrodes are placed on your chest to send your heart signals to a small, portable recorder. You wear this for 24 hours. You're also given a diary to record your activities and any symptoms you have.

You return the recorder and diary the next day and a doctor analyses the results.

You can't have a bath or shower while you're wearing a Holter monitor.

24-hour blood pressure monitor

Everyone's blood pressure changes during the day. Sometimes it can be useful to see how your blood pressure changes.

This is a 24-hour test. A blood pressure monitor is put on your arm. This includes a cuff that inflates every 15 minutes during the day and every 30 minutes while you're sleeping, so you need to wear loose sleeves. You're also given a diary to record your activities and any symptoms you have.

You return the monitor and diary the next day and a doctor analyses the results.

You can't have a bath or shower while you're wearing the blood pressure monitor.

Echo tests (echocardiograms)

Echo tests use ultrasound waves to give a live picture of your heart (similar to how ultrasound waves show images of a baby inside its mother's womb). An ultrasound probe is held against your chest to show the shape of your heart, how it's beating, and how its valves are working.

A dobutamine stress echo test is like an echo test but uses a drug to make your heart beat more forcefully, as it does when you exercise.

A transoesophageal echo (TOE) is an echo test in which the probe is put down your oesophagus (gullet) to view your heart from a different angle. You'll be sedated if you have this test.

Electrophysiology study

This is a test that looks at the electrical circuits in your heart.

Angiogram

An angiogram looks at the blood vessels in your heart to check for any blockages or narrowed arteries that could cause angina or a heart attack.

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Written by HealthInfo clinical advisers. Endorsed by clinical director, Cardiology, Canterbury DHB. Last reviewed May 2016.

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Review key: HITHP-51786