Assertion: ventricular fibrillation | /r/CapableOf | start off as rapid heartbeat
Facets:
value: in some cases
type: TEMPORAL
Source sentences:
text: In some cases, Ventricular Fibrillation starts off as a rapid heartbeat also known as ventricular tachycardia, which is caused due to abnormality in the electrical impulses beginning in the ventricles.