A client with a history of chronic heart failure reports new symptoms. Which finding(s) should prompt the nurse to consider an acute exacerbation of heart failure? Select all that apply.

An acute exacerbation of heart failure involves worsening fluid overload and impaired cardiac output that manifest through specific clinical signs. Sudden night awakening with shortness of breath, known as paroxysmal nocturnal dyspnea, occurs when fluid redistributes from dependent tissues back into the circulation during recumbency, increasing pulmonary venous pressure and causing dyspnea. Needing more pillows to sleep, called orthopnea, reflects the same mechanism — elevating the head reduces pulmonary congestion. Cyanosis or pallor indicates impaired tissue perfusion or severe hypoxemia due to pulmonary edema. A rapid, irregular heart rate is commonly associated with arrhythmias such as atrial fibrillation that accompany or trigger acute decompensation. These four findings collectively represent classic signs of acute heart failure exacerbation and should prompt urgent assessment and intervention. A morning productive cough with clear sputum is more consistent with chronic bronchitis or respiratory infection rather than acute heart failure, where cough tends to be frothy or pink-tinged in severe pulmonary edema. Increased nocturia, while present in compensated heart failure as the kidneys excrete excess fluid when the client is recumbent, is not a hallmark of acute exacerbation and may actually decrease during severe decompensation when renal perfusion is critically impaired. Therefore, nocturia and morning clear-sputum productive cough are excluded from the correct selections.