A 68-year-old patient with acute decompensated heart failure…

A 68-year-old patient with acute decompensated heart failure presents with dyspnea, bilateral lower extremity edema, and jugular venous distension. The patient has been taking oral furosemide 40 mg twice daily at home. Intravenous furosemide is initiated. Which mechanism best explains why loop diuretics produce greater natriuresis than thiazide diuretics in this clinical setting?