A nurse is assisting with the plan of care for a client who has atrial fibrillation and reports feeling heart palpitations, lightheadedness, and shortness of breath. Which of the following procedures should the nurse anticipate for this client?

A. Pericardiocentesis: Pericardiocentesis treats cardiac tamponade from pericardial effusion; it is not the treatment for symptomatic atrial fibrillation. B. Synchronized electrical cardioversion: A symptomatic, hemodynamically significant atrial fibrillation (palpitations, lightheadedness, dyspnea) often requires urgent synchronized cardioversion to restore sinus rhythm. C. Pericardial window: A surgical drainage procedure for recurrent pericardial effusion/tamponade; not indicated for atrial fibrillation. D. Septal myectomy: A surgical procedure for hypertrophic obstructive cardiomyopathy; not a treatment for atrial fibrillation.