Arrhythmia

How do you lower your risk of an arrhythmia?

It is not always possible to prevent an arrhythmia developing, although a healthy lifestyle can lower your risk of developing a heart condition.

Treatment aims to prevent future episodes. You can also make lifestyle changes so you avoid some of the triggers for your heart rhythm problem.

Your heart's electrical system

The heart's rhythm is controlled by electrical signals. An arrhythmia is an abnormality of the heart's rhythm. It may beat too slowly, too quickly, or irregularly.

These abnormalities range from a minor inconvenience or discomfort to a potentially fatal problem.

Could you have an arrhythmia?

Symptoms of arrhythmias include palpitations, feeling dizzy, fainting and being short of breath, although having these symptoms does not always mean you have a heart rhythm problem.

Arrhythmia Alliance's heart rhythm checklist can help you gather information to discuss with your GP if you have any of these symptoms.

Diagnosing arrhythmias

If your symptoms persist or there's a history of unexplained sudden death in your family, it's important for your GP to refer you to a heart specialist (a cardiologist or electrophysiologist who specialises in heart rhythm disorders).

The most effective way to diagnose an arrhythmia is with an electrical recording of your heart rhythm called an electrocardiogram (ECG). If the ECG doesn't find a problem, you may need further monitoring of your heart.

This may involve wearing a small portable ECG recording device for 24 hours or longer. This is called a Holter monitor or ambulatory ECG monitoring.

If your symptoms seem to be triggered by exercise, an exercise ECG may be needed to record your heart rhythm while you are using a treadmill or exercise bike.

You should request a copy of your ECG. Take it with you to see the cardiologist or heart rhythm specialist and always keep a copy for future use.

Other tests used in diagnosing arrhythmias include:

• cardiac event recorder – a device to record occasional symptoms over a period of time whenever you have them
• electrophysiological (EP) study – a test to locate problems with the electrical signals in your heart by passing soft wires up a vein in your leg and into your heart while you are sedated
• echocardiogram (echo) – an ultrasound scan of your heart

Treatment for arrhythmias

How your arrhythmia will be treated will depend on whether it is a fast or slow arrhythmia or heart block. Any underlying causes of your arrhythmia, such as heart failure, will need to be treated as well.

The treatments used for arrhythmias include:

• medication – to stop or prevent an arrhythmia or control the rate of an arrhythmia
• cardioversion – a treatment that uses electricity to shock the heart back into a normal rhythm while you are anaesthetised or sedated
• catheter ablation – a keyhole treatment under local or general anaesthetic that carefully destroys the diseased tissue in your heart that causes the arrhythmia
• pacemaker – a small device containing its own battery that is implanted in your chest under local anaesthetic; it produces electrical signals to do the work of the natural pacemaker in your heart to help it beat at a normal rate
• ICD – a device similar to a pacemaker that monitors your heart rhythm and shocks your heart back into a normal rhythm whenever this is needed

Staying safe with an arrhythmia

If you have an arrhythmia that affects your driving, you must tell the Driver and Vehicle Licensing Agency (DVLA).

If your job involves working at height or with machinery that could be dangerous, you will need to stop work at least until your arrhythmia is diagnosed or you get treatment for your underlying condition. Get advice from your GP or cardiologist.

Support services

Find heart disease information and support services

Find atrial fibrillation services

Find pacemaker implantation services

Other heart rhythm pages

See the list below for information about specific heart rhythm problems.

Atrial fibrillation

Brugada syndrome

Heart block

Heart palpitations

Long QT syndrome

Supraventricular tachycardia

Wolff-Parkinson-White syndrome