Assertion: heart valve | /r/HasProperty | diseased
Facets:
value: severely
type: DEGREE
Source sentences:
text: Two main problems can occur when heart valves are diseased or damaged:
text: When heart valves are severely diseased the treatment is valve replacement surgery with artificial or bioprosthetic heart valves.
text: If bacteria begin to grow on heart valves that are already diseased, it is difficult to fight the infection, and bacterial endocarditis can occur.