Assertion: atrial fibrillation | /r/Causes | heart failure
Facets:
value: in some cases
type: TEMPORAL
Source sentences:
text: Atrial fibrillation can weaken your heart over time and cause heart failure, meaning your heart is not pumping enough blood throughout your body.
text: Atrial fibrillation can increase the risk of stroke and, in some cases, cause heart failure.