Arrhythmia

Source: MedlinePlus Health Topics, U.S. National Library of Medicine

Last synced 8/9/2026Status: primary verified

What is an arrhythmia? An arrhythmia is a problem with the rate or rhythm of your heartbeat. Your heart beats too quickly, too slowly, or with an irregular pattern. Changes in the electrical signals that control your heartbeat cause arrhythmias. When your heart beats faster than normal, it's called tachycardia . When your heart beats too slowly, it's called bradycardia . When the signal to beat comes too early, it's called a premature or extra heartbeat . It may feel like your heart skipped a beat. There are many types of arrhythmias. Arrhythmias may affect the upper or lower chamber of your heart. The most common type of arrhythmia is atrial fibrillation , which causes an irregular and fast heartbeat. Some arrhythmias are harmless, such as when your heart rate speeds up during exercise and slows down when you sleep. But if you have a frequent irregular rhythm, it may mean your heart isn't pumping enough blood into your body. Getting treatment and following a heart-healthy lifestyle can help control arrhythmias. It may also help prevent heart damage that can trigger some heart arrhythmias. What causes an arrhythmia? Many factors can affect your heart's rhythm, such as having had a heart attack , smoking , congenital heart defects , and stress. Other factors that could increase your risk for some types of arrhythmias could include if you: Have a family history of arrhythmias. Have certain health conditions, which can include heart and blood vessel diseases , lung diseases , kidney diseases , obesity , and sleep apnea . Are an older adult. Have had recent surgery for your heart, lungs, or throat. Take certain medicines for other health conditions. Use illegal drugs . If you have risk factors, some situations that make your heart work harder, raise your blood pressure, or cause strong emotional stress may trigger an arrhythmia. What are the symptoms of an arrhythmia? You may not have any noticeable symptoms of an arrhythmia. Your provider may find an arrhythmia during

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This information is for general education and is not medical advice. Always talk to a licensed U.S. clinician about your situation, medications, or treatment decisions.