The nurse is caring for a recently admitted patient and notes the following priority intervention?

A. Atropine is the first-line medication for symptomatic bradycardia. It increases heart rate by blocking vagal stimulation. Timely administration prevents progression to hypotension, decreased cerebral perfusion, and cardiac arrest. This is the priority because it directly treats the life-threatening rhythm. B. Dobutamine is a positive inotrope, used more for cardiogenic shock or reduced contractility. It is not first-line for bradycardia and does not address vagal-mediated slow HR. Only considered if atropine and pacing fail. C. Transcutaneous pacing is appropriate if atropine is ineffective or if bradycardia is severe with instability. It is not the first step unless the patient is pulseless or profoundly unstable. Atropine should be tried first. D. While assessment is important, the life-threatening rhythm must be stabilized immediately. Additional assessment delays treatment and risks deterioration.