Assertion: coronary sinus | /r/CapableOf | open into right atrium
Facets:
value: with its opening
type: TEMPORAL
value: posteromedially
type: MANNER
Source sentences:
text: The coronary sinus opens into the right atrium posteromedially, with its opening being guarded by the highly variable thebesian valve, which can hinder cannulation of the coronary sinus os (15).