This case study examines a patient, Mrs. Brown, presenting with acute dyspnea, rapid pulse, and other symptoms indicative of left-sided heart failure. The assignment delves into the pathogenesis of the condition, explaining how ineffective left ventricular function leads to fluid accumulation in the lungs and insufficient oxygen supply to the body. It covers the causes, clinical manifestations, diagnostic procedures, and stages of the disease. The case study also explores nursing strategies, including enhancing activity tolerance and managing fluid accumulation through low-sodium diets. Furthermore, it analyzes the mechanism of action and nursing implications of Furosemide and Glyceryl trinitrate, common medications used in the treatment of heart failure. The study emphasizes the importance of monitoring drug administration to prevent adverse outcomes and maintain patient well-being, referencing key literature on heart failure management.