A client is to receive an intravenous dose of adenosine. What immediate response to this medication should the nurse expect? A:

A. Adenosine temporarily blocks AV node conduction, often causing a brief period of asystole before normal rhythm resumes. B. Seizures are not a typical immediate response to adenosine. C. Premature ventricular beats are not a common effect of adenosine. D. Adenosine usually causes vasodilation and may lower blood pressure, not increase it dramatically.