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Arrhythmias or heart rhythm problems are experienced by more than 2 million people a year in the UK. Most people with an abnormal heart rhythm can lead a normal life if it is properly diagnosed.
The main types of arrhythmia are:
Arrhythmias can affect all age groups, but atrial fibrillation is more common in older people. Drinking alcohol in excess or being overweight increases your likelihood of developing atrial fibrillation.
Certain types of arrhythmia occur in people with severe heart conditions, and can cause sudden cardiac death. This kills 100,000 people in the UK every year. Some of these deaths could be avoided if the arrhythmias were diagnosed earlier.
Common triggers for an arrhythmia are viral illnesses, alcohol, tobacco, changes in posture, exercise, drinks containing caffeine, and certain over-the-counter, prescribed and illegal recreational drugs.
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.
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.
Arrhythmia Alliance's heart rhythm checklist can help you gather information to discuss with your GP if you have any of these symptoms.
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:
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:
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.
See the list below for information about specific heart rhythm problems.