Assertion: atrial fibrillation's heart rate | /r/CapableOf | happen in people
Facets:
Source sentences:
text: Why It Is Done Pacemakers are used to treat a slow heart rate (bradycardia) that can happen in people who have atrial fibrillation.
text: The pacemaker is used to treat a slow heart rate (bradycardia) that happens in some people who have atrial fibrillation.