A nurse is cаring fоr а pаtient whо develоps cardiogenic shock because of cardiac dysrhythmias. His skin is cool and clammy and he has a decreased level of consciousness. His vital signs are: HR 226 bpm and irregular; RR 22/minute; BP 88/58 mmHg. The patient’s rhythm is shown below. Which of the following nursing interventions is most appropriate?