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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.

  2. Heart arrhythmia - Diagnosis and treatment - Mayo Clinic

    Oct 13, 2023 · To diagnose a heart arrhythmia, a healthcare professional examines you and asks about your medical history and symptoms. You may have tests to check your heart and to look for health …

  3. Atrial fibrillation - Symptoms and causes - Mayo Clinic

    Oct 3, 2025 · An irregular heart rhythm is called an arrhythmia. AFib can lead to blood clots in the heart. The condition also increases the risk of stroke, heart failure and other heart-related complications. …

  4. Supraventricular tachycardia - Symptoms and causes - Mayo Clinic

    Mar 7, 2024 · Supraventricular tachycardia (SVT) is a type of irregular heartbeat, also called an arrhythmia. It's a very fast or erratic heartbeat that affects the heart's upper chambers.

  5. Atrial fibrillation - Diagnosis and treatment - Mayo Clinic

    Arrhythmia and Electrophysiology Review. 2022; doi:10.15420/aer.2022.05. Verma A, et al. Pulsed field ablation for the treatment of atrial fibrillation: PULSED AF pivotal trial.

  6. Atrial fibrillation ablation - Mayo Clinic

    Apr 9, 2024 · What is an arrhythmia? National Heart, Lung, and Blood Institute. https://www.nhlbi.nih.gov/health/arrhythmias. Accessed Dec. 18, 2023. Deshpande S, et al. Impact of …

  7. Ventricular tachycardia - Symptoms and causes - Mayo Clinic

    Mar 6, 2024 · Ventricular tachycardia is a type of irregular heartbeat, called an arrhythmia. It starts in the lower chambers of the heart, called the ventricles. This condition also may be called V-tach or VT. A …

  8. Holter monitor - Mayo Clinic

    Apr 16, 2024 · Why it's done You may need to use a Holter monitor if you have: Symptoms of an irregular heartbeat, also called arrhythmia. Fainting with no known cause. A heart condition that …

  9. Premature ventricular contractions (PVCs) - Mayo Clinic

    Sep 20, 2025 · Overview Premature ventricular contractions (PVCs) are a type of irregular heartbeat, also called an arrhythmia. PVCs are extra heartbeats. They start in one of the heart's lower …

  10. Tachycardia - Symptoms and causes - Mayo Clinic

    Dec 15, 2023 · Tachycardia (tak-ih-KAHR-dee-uh) is the medical term for a heart rate over 100 beats a minute. Many types of irregular heart rhythms, called arrhythmias, can cause tachycardia. A fast …