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  1. First Interstate Bank

    Dec 1, 2025 · Explore personal and business banking, loans, and digital tools backed by local service and community commitment.

  2. 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 …

  3. FIB Definition & Meaning - Merriam-Webster

    The meaning of FIB is a trivial or childish lie. How to use fib in a sentence. Synonym Discussion of Fib.

  4. Fibrillation - Wikipedia

    There are two major classes of cardiac fibrillation: atrial fibrillation and ventricular fibrillation. Atrial fibrillation is an irregular and uncoordinated contraction of the cardiac muscle of atria. It can be …

  5. 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.

  6. Atrial Fibrillation (AFib) Signs, Symptoms and Treatment

    Feb 5, 2025 · Atrial fibrillation (AFib) is a common type of irregular heartbeat that affects an estimated five million Americans.

  7. Understanding atrial fibrillation and its symptoms - UCLA Health

    Dec 6, 2024 · When someone has atrial fibrillation, it means the two upper chambers of the heart have ceased to function properly. It occurs due to a malfunction in a cluster of cells in the right …

  8. 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 …

  9. 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.

  10. Understanding Atrial Fibrillation (A-fib) | Veterans Affairs

    Atrial fibrillation (A-fib) is the most common type of arrhythmia. An arrhythmia is any problem with the speed or pattern of the heartbeat. A-fib causes the heart to beat in an irregular pattern, …