Occult gastrointestinal bleeding in the aged simulating cardiac disease.
D000368:Aged; D004194:Disease; D006471:Gastrointestinal Hemorrhage; D041981:Gastrointestinal Tract; D006331:Heart Diseases; D006470:Hemorrhage; D006801:Humans
AGED/diseases; GASTROINTESTINAL SYSTEM/hemorrhage; HEART DISEASE/in aged; HEMORRHAGE