Condition most likely experiencing: The client exhibits classic symptoms of left-sided heart failure, including dyspnea, nocturia, crackles, a dry hacking cough (worse at night), S3 gallop, and fatigue. Low blood pressure (98/50 mm Hg), tachycardia (112/min), tachypnea (28/min), and oxygen saturation of 88% indicate poor cardiac output and pulmonary congestion. Elevated BNP (410 pg/mL; normal <100 pg/mL) confirms heart failure. The atrial fibrillation on ECG is a common complication of heart failure, further worsening cardiac function. Actions to take: Administer supplemental oxygen: The client’s SpO2 is 88%, indicating hypoxia. Oxygen therapy will improve oxygenation and reduce respiratory distress. Elevate the head of the client’s bed: This helps reduce pulmonary congestion and improve breathing by promoting lung expansion.: Parameters to monitor: Weight: Daily weights are the best indicator of fluid retention and effectiveness of diuretic therapy. Sudden weight gain suggests worsening heart failure. Urine output: Low urine output may indicate worsening heart failure and poor renal perfusion. Increased urine output after treatment suggests effective fluid removal.