Assertion: heart murmur's cause | /r/HasProperty | narrowing
Facets:
value: within vessel
type: LOCATION
value: within a chamber
type: LOCATION
value: in more
type: OTHER
Source sentences:
text: One common cause of an abnormal murmur is a narrowing in one or more of the four valves in the heart.
text: Another cause is a narrowing (stenosis) within a chamber or vessel through which the blood has to squeeze through, like water through a pinched hose.