The nurse is administering amiodarone to a patient who is being treated for a ventricular arrhythmia. The patient has received a bolus of 150 mg of amiodarone IV and is now receiving a continuous infusion of 1 mg/min. The nurse notes a heart rate of 60 beats per minute and a blood pressure of 88/54 mm Hg. The nurse will notify the provider and perform which other action?