a 50-year-old lady presented with bloody vomiting and melena since four days prior to admission. her medical history was significant only for hypertension which was controlled by a 5 mg daily dose of amlodipine. she occasionally took nsaids. on admission, the physical exam revealed only mild tachycardia and pallor. hemoglobin was 9.7 g/dl, which subsequently declined to 7.9 g/dl. the first uppe...
