Intermediate
Technical
In the Industry Vocabulary Test
atrial fibrillation
An irregular heart rhythm characterized by rapid, chaotic electrical activity in the heart's upper chambers (atria).
Full Definition
Atrial fibrillation (AFib) is the most common sustained cardiac arrhythmia, affecting millions worldwide. It occurs when the electrical signals in the atria become disorganized, causing the atria to quiver instead of contracting effectively. This leads to an irregular and often rapid heart rate, typically between 100-175 beats per minute. AFib increases the risk of stroke, heart failure, and other cardiovascular complications. Treatment options include rate control, rhythm control, anticoagulation therapy, and catheter ablation procedures.
Usage
Usage note: Commonly abbreviated as AFib or AF in clinical documentation.
In Context
- "The ECG revealed atrial fibrillation with rapid ventricular response." — Emergency department report
- "Patients with persistent atrial fibrillation require long-term anticoagulation." — Treatment guideline
Also known as
AFib
AF
Contrasted with
normal sinus rhythm
Don't confuse with
atrial flutter
atrial tachycardia