The nurse on the telemetry unit responds to the cardiac monitor alarm on a patient recovering from a myocardial infarction. Upon entering the room, the nurse notes the rhythm on the monitor appears to be ventricular tachycardia. (Learning Objective 4) 1. What action should the nurse take first? b. The nurse notes the patient has no pulse, and tells someone to get the code cart and another to call the hospital's code team. Upon arrival of the code cart, the nurse prepares the defibrillator for use. At what energy level does the nurse set the biphasic defibrillator for the first shock? c. After defibrillation, the nurse assesses the patient, finds him pulseless, and initiates cardiopulmonary resuscitation. The code team has arrived, and epinephrine is administered. What is the rationale for this medication in this emergency situation? d. What is the difference between monophasic and biphasic defibrillators?