Early Increase in Blood Supply in Patients With Barrett's Esophagus

Inclusion Criteria: * age 18 years or older, * informed written consent, * patient scheduled for previously planned upper endoscopy Exclusion Criteria: * liver disease; * gastric antral vascular ectasia (GAVE);any known non-esophageal aerodigestive malignancy; * severe cardiopulmonary disease precluding endoscopy; presence of conditions not allowing biopsy (e.g. coagulation disorder); * known familial polyposis syndrome (FAP, HNPCC, Juvenile polyposis, etc.); * known pregnancy or sexually active females of childbearing age who are not practicing an accepted form of birth control.