A nurse is collecting data on a client who has a pericardial effusion and has developed hypotension and muffled heart sounds. Which of the following procedures should the nurse anticipate for this client?

A. Synchronized electrical cardioversion: Used for certain unstable tachydysrhythmias (e.g., unstable SVT, AF with RVR, unstable VT with pulse); not a treatment for cardiac tamponade. B. Left ventricular assist device: LVAD is for severe refractory heart failure or cardiogenic shock as longer-term mechanical support; it is not the immediate procedure for tamponade. C. Pericardiocentesis: Cardiac tamponade from pericardial effusion causes hypotension, muffled heart sounds, and JVD — emergent pericardiocentesis (drainage of pericardial fluid) is the anticipated urgent procedure. D. Septal myectomy: A surgical procedure for hypertrophic obstructive cardiomyopathy; not indicated for pericardial effusion/tamponade.