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 …
Atrial Fibrillation (AFib): Symptoms & Treatment
Apr 21, 2025 · Atrial fibrillation (AFib) is an irregular heart rhythm that begins in your heart’s upper chambers (atria). Symptoms …
What is Atrial Fibrillation? - American Heart Association
Mar 26, 2025 · 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 · Atrial fibrillation is a common heart condition that causes irregular heartbeats. Learn about its causes, symptoms, and …
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 …
Atrial fibrillation - Wikipedia
Atrial fibrillation ... Atrial fibrillation (AF, AFib or A-fib) is an abnormal heart rhythm (arrhythmia) characterized by rapid and irregular …
Atrial Fibrillation (AFib): Symptoms, Treatment, When to Worry
Sep 14, 2025 · Atrial fibrillation, often called AFib, causes an irregular and sometimes rapid heartbeat. It ranks as one of the most …
7 common Afib triggers that may surprise you - Michigan Medicine
May 26, 2022 · Atrial fibrillation, or Afib, is one of the most common types of heart rhythm conditions. During Afib, the top chambers …
About Atrial Fibrillation | Heart Disease | CDC
May 14, 2024 · When a person has AFib, the normal beating in the upper chambers of the heart (the two atria) is irregular, and blood …
Atrial fibrillation - NHS
Find out about atrial fibrillation, a condition that causes an irregular heart rhythm, including symptoms, treatment and how it affects …