Question: 71-year-old male with a history of congestive heart failure. He has had continuous shortness of breath for the past 5 days. He denies chest pain. He has had worsening pedal edema and has had to sleep with 4 pillows at night or in the recliner by his bedside. He called his primary care provider and was advised to go to the emergency department. In the ED, he presented with 3 pitting pedal edema, dyspnea at rest with SPO2 91% on room air. Diagnosis: acute exacerbation of his congestive heart failure. His chest x-ray showed pulmonary edema. He was admitted to the telemetry unit for management and monitoring of his heart failure.