Case Presentation: A 69 year-old man presented after experiencing fatigue and fever for two days. He complained of accompanying dyspnea with decreased exercise tolerance and new four-pillow orthopnea. He had a history of myocardial infarction, coronary artery disease status-post multi-vessel coronary artery bypass graft, heart failure with reduced ejection fraction with an implantable cardioverter defibrillator […]