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  1. Heart arrhythmia - Symptoms and causes - Mayo Clinic

    Oct 13, 2023 · A heart arrhythmia (uh-RITH-me-uh) is an irregular heartbeat. A heart arrhythmia occurs when the electrical signals that tell the heart to beat don't work properly.

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  2. Arrhythmia: Types, Symptoms & Treatment - Cleveland Clinic

    Apr 9, 2026 · An arrhythmia is an abnormal or irregular heart rhythm. A problem with heartbeat signals makes your heart beat too fast, too slow or in an irregular way.

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  3. What is an Arrhythmia? - American Heart Association

    Sep 24, 2024 · Arrhythmias are abnormal heartbeats. The term “arrhythmia” refers to any change from the normal sequence of electrical impulses. Some arrhythmias are so brief (such as a temporary …

  4. Arrhythmia: Symptoms, Types, Causes, Treatment, Prevention

    Jul 9, 2025 · What is arrhythmia? An arrhythmia is a disorder of the heart that affects the rate or rhythm at which the heart beats; basically the way the electricity works.

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  5. Understanding Arrhythmia: Causes, Symptoms, and Treatment Options - WebMD

    Sep 29, 2025 · What Is an Arrhythmia? An arrhythmia (pronounced as “ uh-RITH-me-uh”) is an irregular heartbeat. This means your heart is out of its usual rhythm. About 1.5%-5% of people have arrhythmias.

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  6. Arrhythmia: Types, causes, symptoms, and treatment

    May 22, 2024 · An arrhythmia is an irregular heartbeat that may feel like a racing or fluttering heart. It is not always serious but can sometimes indicate a potentially fatal heart problem.

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  7. Arrhythmia | Irregular Heartbeat | MedlinePlus

    Jun 19, 2025 · Arrhythmia, also called irregular heartbeat comes in different types. The most common is atrial fibrillation. Read about symptoms and treatment.

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  8. Arrhythmias - What Is an Arrhythmia? | NHLBI, NIH

    Mar 24, 2022 · An arrhythmia, or irregular heartbeat, is a problem with the rate or rhythm of your heartbeat. Your heart may beat too quickly, too slowly, or with an irregular rhythm. It is normal for …

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  9. Arrhythmias - Johns Hopkins Medicine

    An arrhythmia means the heart is not beating in the proper rhythm. This can cause anything from minor symptoms all the way to cardiac arrest and death. Since different rhythm disturbances need different …

  10. Cardiac arrhythmias - Harvard Health

    Jan 28, 2026 · What is it? A cardiac arrhythmia is any abnormal heart rate or rhythm. In normal adults, the heart beats regularly at a rate of 60 to 100 times per minute. And the pulse (felt at the wrist, neck …