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
Apr 21, 2025 · Atrial fibrillation (AFib) is an irregular heart rhythm that begins in your heart’s upper chambers (atria). Symptoms …
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 …
Atrial Fibrillation - American Heart Association
Atrial fibrillation is an irregular heartbeat, or arrhythmia. Atrial fibrillation, also known as AFib or AF, can lead to blood clots, stroke, …
Atrial Arrhythmia: Types, Causes and Symptoms - Cleveland Clinic
Atrial arrhythmias are irregular heartbeats that cause poor circulation. They occur when the upper chambers of your heart are out of …
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 - Diagnosis and treatment - Mayo Clinic
Jan 14, 2026 · Learn more about the diagnosis and treatment of Atrial fibrillation. Find tips to get ready for any appointments you need.
What Is a Normal Atrial Rate & When to Be Concerned?
Oct 2, 2026 · Discover what defines a healthy atrial heart rate and learn to recognize signs that may signal a need for medical attention.
Atrial Fibrillation - Harvard Health
Mar 7, 2026 · Atrial fibrillation (afib) is the most common type of heart arrhythmia. Some people have symptoms such as dizziness, …
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 …