Case Presentation: A 76 year-old African American female with no past medical history presented with new onset shortness of breath and substernal chest pressure of three week duration. She noted that she had been previously healthy without any issues prior to this incident. On presentation, the patient was afebrile and normotensive (125/76) but tachycardic (110 [...]

Case Presentation: A 47-year-old African-American man with obstructive sleep apnea presented to the emergency department after being called-back due to evidence of complete atrioventricular (AV) block on routine electrocardiogram. Patient reported a 6-month history of fatigue and exertional dyspnea. On physical examination, he was afebrile and in no acute distress. Vital signs were BP: 142/92 [...]