venous reflux of contrast occurred in 7/19 normal subjects ( group 1 ) , 13/17 patients with definite or probable tricuspid regurgitation ( group 2 ) , 10/13 patients with congestive cardiac failure ( group 3 ) and 10/21 patients with miscellaneous cardiac conditions unlikely to be associated with tricuspid regurgitation ( group 4 ) .
C0018802
congestive cardiac failure
C0018799
cardiac conditions