Assertion: mitral valve's leaflet | /r/CapableOf | align in same plane
Facets:
value: during normal closure
type: TEMPORAL
value: during coaptation
type: TEMPORAL
Source sentences:
text: During normal closure, both leaflets must align in the same plane during coaptation and require an optimal annular size, a geometrically correct orientation of the papillary muscles, appropriate tethering to the tendinous cords, and suitable closing forces generated by LV muscular contraction.3