Assertion: normal aortic valve | /r/HasAspect | leaflet
Facets:
value: usually
type: TEMPORAL
Source sentences:
text: The normal aortic valve usually has three cusps, or leaflets, but the valve is bicuspid in 1 to 2 percent of the population.
text: While normal aortic valves have three leaflets, my aortic valve only had two leafltes.