Assertion: atrial fibrillation | /r/HasProperty | heart rhythm problem
Facets:
Source sentences:
text: Atrial fibrillation, commonly referred to as AF or a-Fib, is the most commonly occurring arrhythmia, or heart rhythm problem.
text: Atrial fibrillation, commonly referred to as AF or a-Fib, is the most commonly occurring arrhythmia, or heart rhythm problem.