Assertion: atrial fibrillation's heart rhythm | /r/HasProperty | rapid
Facets:
value: very
type: DEGREE
value: often
type: TEMPORAL
Source sentences:
text: Atrial fibrillation (also referred to as AFib, Afib, A-fib, and AF) is an irregular and often rapid heart rhythm.
text: In some people, AF can cause chest pain or heart failure, particularly when the heart rhythm is very rapid.