Case Presentation: A 72-year-old male presented to the emergency room for macrocytic anemia and a creatinine of 9.72 mg/dL on outpatient lab work. Past medical history was notable for paroxysmal supraventricular tachycardia, gastroesophageal reflux disease and heart failure with reduced ejection fraction. On admission, he complained of six months of fatigue with constipation, 60 lbs [...]

Case Presentation: A 75-year-old male with a history of gastrointestinal bleeding (GIB) due to angiodysplasia, aortic stenosis (AS) status post TAVR, moderate-severe mitral regurgitation (MR), CKD, GERD, and atrial fibrillation not on anticoagulation presented due to lightheadedness for 1 day when standing up, and fatigue for a few weeks. He also reported dark brown stools [...]