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 - Cleveland Clinic
Oct 14, 2026 · 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 is an irregular heartbeat, or arrhythmia. Atrial fibrillation, also known as AFib or AF, can lead to blood …
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 …
Atrial fibrillation ablation - Mayo Clinic
Atrial fibrillation (AFib) is a heart rhythm condition. In a typical heart, a group of cells called the sinus node sends electrical signals …
AFib: When is it an emergency? - Medical News Today
Oct 23, 2024 · Learn about the symptoms of AFib and when a person may need to go to the emergency room or seek care from a …
Atrial fibrillation - Wikipedia
Atrial fibrillation (AF, AFib or A-fib) is an abnormal heart rhythm (arrhythmia) characterized by rapid and irregular beating of the atrial …
Understanding AFib: Symptoms, Treatment and Living Well
Atrial fibrillation (AFib) is a quivering or irregular heartbeat, or arrhythmia, that can lead to blood clots in the heart and increase the …
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 - NHS
Find out about atrial fibrillation, a condition that causes an irregular heart rhythm, including symptoms, treatment and how it affects …