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 …
Atrial Fibrillation (AFib): Symptoms & Treatment
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 …
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 …
Focused ion beam - Wikipedia
A FIB setup is a scientific instrument that resembles a scanning electron microscope (SEM). However, while the SEM uses a focused beam of electrons to image the sample in the …
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 …
FIB-4 Index Explained: How to Calculate Your Fib 4 Score for ...
Nov 7, 2025 · Learn how the FIB-4 Index uses AST, ALT, platelets, and age to estimate liver fibrosis risk—plus how to self-calculate without charges.
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 …