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  1. Why Atrial Fibrillation Matters - American Heart Association

    Mar 26, 2025 · Atrial fibrillation (AFib) can increase your risk for stroke and related heart problems. There are treatments and medications for AFib. But sometimes it never goes away. What are the …

  2. First Interstate Bank

    Nov 24, 2025 · Explore personal and business banking, loans, and digital tools backed by local service and community commitment.

  3. Atrial fibrillation - Symptoms and causes - Mayo Clinic

    Oct 3, 2025 · Atrial fibrillation (AFib) is an irregular and often very rapid heart rhythm. An irregular heart rhythm is called an arrhythmia. AFib can lead to blood clots in the heart. The condition also increases …

  4. Atrial Fibrillation: Prevention, Treatment and Research

    Atrial fibrillation (often called “A-fib” or AF) is the most common type of abnormal heartbeat. It can be cause for concern since it dramatically increases the risk of stroke.

  5. Atrial Fibrillation (A-Fib): Symptoms & Risk Factors | Brigham and ...

    Atrial fibrillation (A-fib) is a type of arrhythmia (abnormal heartbeat) that affects almost five million Americans. It often originates in the left atrium (the upper left chamber of the heart). When atrial …

  6. Atrial Fibrillation - What Is Atrial Fibrillation? | NHLBI, NIH

    Nov 30, 2022 · Atrial fibrillation, also known as A-fib or AF, is one of the most common types of arrhythmias (irregular heart rhythms). Atrial fibrillation causes your heart to beat irregularly and …

  7. Understanding Atrial Fibrillation (A-Fib) | UMass Memorial Health

    Atrial fibrillation, or A-fib, is a common type of heart arrhythmia. It causes fast, chaotic electrical signals in the atria.

  8. A-Fib (Atrial Fibrillation) - What You Need to Know - Drugs.com

    Dec 9, 2025 · Care guide for A-Fib (Atrial Fibrillation). Includes: possible causes, signs and symptoms, standard treatment options and means of care and support.

  9. Atrial Fibrillation – Symptoms and Causes | Penn Medicine

    What is atrial fibrillation? Atrial fibrillation (AFib) is a common heart rhythm disorder where the heart’s upper chambers, called the atria, beat irregularly and out of sync with the lower chambers, called the …

  10. Health Encyclopedia - University of Rochester Medical Center

    Atrial fibrillation (AFib) is the most common type of abnormal heart rhythm (arrhythmia). Normally, a group of cells in the right upper heart chamber (atrium) gives the signal to start your heartbeat. …