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Atrial fibrillation - Symptoms and causes - Mayo Clinic
Jan 14, 2026 · 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 …
Atrial Fibrillation (AFib): Symptoms & Treatment - Cleveland Clinic
Apr 21, 2025 · AFib causes a fast, chaotic heartbeat. An electrocardiogram (ECG/EKG) test can show this irregular rhythm in graph form. AFib (atrial fibrillation) is an irregular heart rhythm that begins in …
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 complications. AFib …
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 normal...
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 …
A-Fib (Atrial Fibrillation) - What You Need to Know - Drugs.com
Mar 3, 2026 · Care guide for A-Fib (Atrial Fibrillation). Includes: possible causes, signs and symptoms, standard treatment options and means of care and support.
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.
How To Recognize and Treat Atrial Fibrillation (A-Fib) - Health
Feb 28, 2026 · Atrial fibrillation (A-fib) causes heart palpitations and fatigue. It affects the upper heart chambers and disrupts blood flow to the ventricles.
About Atrial Fibrillation | Heart Disease | CDC
May 14, 2024 · Atrial fibrillation, often called AFib or AF, is the most common type of treated heart arrhythmia. An arrhythmia is when the heart beats too slowly, too fast, or in an irregular way.