Assertion: valve | /r/HasProperty | endocarditis
Facets:
Source sentences:
text: Regurgitation may occur because of floppy leaflets (prolapse), abnormal congenitally deformed valves (bicuspid or unicuspid), infection of the valve (endocarditis), the inability of the leaflets to close tightly due to dilatation of the aorta (aneurysm), holes in the leaflets, or rheumatic valve disease.