atrial fibrillation
Also written as: AF — Atrial Fibrillation
A common cardiac arrhythmia characterized by irregular and often rapid beating of the atrial chambers of the heart.
Full Definition
Atrial fibrillation (AF) is the most common sustained cardiac arrhythmia, characterized by chaotic electrical activity in the atria resulting in irregular ventricular response and loss of effective atrial contraction. The condition is associated with increased risk of stroke, heart failure, and other cardiovascular complications due to stasis of blood in the atria and potential thrombus formation, particularly in the left atrial appendage. AF can be classified as paroxysmal (self-terminating), persistent (lasting >7 days), or permanent (accepted long-term AF). Management involves rate control, rhythm control, and anticoagulation strategies based on individual patient risk factors and clinical presentation.
Usage
Usage note: Avoid the informal abbreviation 'A-fib' in formal medical documentation.
In Context
- "The patient was diagnosed with new-onset atrial fibrillation and started on anticoagulation therapy." — Emergency department note
- "Rate control was achieved in the atrial fibrillation patient using a combination of metoprolol and digoxin." — Cardiology progress note