Aortic stenosis and gastrointestinal blood loss.
D000368:Aged; D001020:Aortic Stenosis, Subvalvular / Q000150:complications* / Q000601:surgery; D001024:Aortic Valve Stenosis / Q000150:complications* / Q000601:surgery; D002312:Cardiomyopathy, Hypertrophic / Q000150:complications*; D004724:Endoscopy; D005260:Female; D006471:Gastrointestinal Hemorrhage / Q000209:etiology* / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged