The nurse cares for a client diagnosed with atrial flutter w…

The nurse cares for a client diagnosed with atrial flutter with a ventricular response rate of 150 beats/minute.  The client reports feeling short of breath (SOB), having chest pain and the following vital signs.  Which intervention would the nurse perform first?   T 99.9 F P 150 RR 26 BP 89/62 O2 91% RA