Case Presentation: A 63-year-old male with a history of heart failure with reduced ejection fraction (HFrEF), type 2 diabetes, and recent left below-knee amputation presented with worsening dyspnea, orthopnea, and leg swelling. Physical examination revealed volume overload with jugular venous distention and pitting edema. NT-proBNP was markedly elevated (10,901 pg/mL). Transthoracic echocardiography (TTE) showed a [...]