An older adult client with a history of heart failure (HF) comes to the clinic troubled by awakening during the night in a cold sweat, accompanied by difficulty breathing, and a racing heart beat. Which assessment should the nurse complete first?

Rationale: A. Assess the elasticity of the client's skin: Skin elasticity, or turgor, is useful for evaluating hydration status, especially in older adults. However, it does not address the client’s immediate complaints of nocturnal dyspnea, sweating, and tachycardia, which are potentially life-threatening signs of worsening heart failure. B. Auscultate the client's breath sounds: Awakening with dyspnea, sweating, and a racing heartbeat are classic symptoms of paroxysmal nocturnal dyspnea, often seen in decompensated heart failure. Auscultating the lungs can quickly detect crackles or pulmonary congestion, providing critical information needed to prioritize urgent interventions. C. Ask about any environmental allergies: Environmental allergies can cause nighttime breathing issues like nasal congestion, but the combination of cold sweats and tachycardia points more toward a cardiovascular cause rather than an allergic reaction, making this a less urgent assessment initially. D. Measure the client's core temperature: While fever can indicate infection, it is less likely to explain the sudden onset of dyspnea and palpitations in a client with known heart failure. Addressing possible pulmonary congestion through breath sound assessment takes precedence to prevent further cardiac compromise.