A nurse is assessing a client who has pericarditis. Which of the following findings is the priority?

A. Dependent edema: Dependent edema can indicate fluid retention or right-sided heart failure, which may develop in pericardial disease over time. While important to monitor, it is a later sign and does not reflect the immediate risk of hemodynamic compromise, making it a lower priority in acute assessment. B. Pericardial friction rub: A friction rub is a classic diagnostic finding in pericarditis and helps confirm inflammation of the pericardium. Although important for diagnosis, it does not indicate immediate life-threatening complications, so it is not the highest priority. C. Paradoxical pulse: A paradoxical pulse (an exaggerated decrease in systolic blood pressure during inspiration) signals cardiac tamponade, which is a life-threatening complication of pericarditis. Prompt recognition and intervention are critical to prevent cardiovascular collapse, making this the priority finding during assessment. D. Substernal chest pain: Chest pain is a common symptom of pericarditis and should be assessed and managed for comfort and safety. However, while distressing, it does not indicate imminent cardiovascular compromise, so it is less urgent than a finding that suggests tamponade.