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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 …
What is Atrial Fibrillation? - American Heart Association
Mar 26, 2025 · Atrial fibrillation is an irregular heartbeat, or arrhythmia. Atrial fibrillation, also known as AFib or AF, can lead to blood clots, stroke, heart failure and other heart-related …
Atrial Fibrillation (AFib): Causes, Symptoms, and Treatment
Nov 15, 2023 · What Is Atrial Fibrillation? Atrial fibrillation, also called AF or AFib, is a quivery, fluttery heartbeat. You might also hear the doctor call it arrhythmia. It means your heart’s …
What Is Afib? - Johns Hopkins Medicine
Afib stands for atrial fibrillation (AF), which is a type of arrhythmia, or abnormal heartbeat. Afib is caused by extremely fast and irregular beats from the upper chambers of the heart (usually …
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 Fibrillation Treatments: Medications, Therapies, Surgery
Jan 8, 2026 · Atrial fibrillation treatments can slow and normalize your heartbeat. AFib triggers can include obesity, diabetes, and excessive alcohol use. Antiarrhythmic drugs are used to …
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 …
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 …
A-Fib (Atrial Fibrillation) - What You Need to Know - Drugs.com
Jan 6, 2026 · Care guide for A-Fib (Atrial Fibrillation). Includes: possible causes, signs and symptoms, standard treatment options and means of care and support.