The 72-year-old patient is brought via the ambulance to the emergency department after his wife observed him collapsing after dinner. At the scene, emergency medical service (EMS) personnel determined he was in asystole, and began cardiopulmonary resuscitation (CPR). An advanced airway was placed and a peripheral intravenous catheter was inserted. The defibrillator was placed and read ventricular fibrillation; a shock was administered, chest compressions were restarted, and a 1 mg epinephrine dose was administered via peripheral IV. Upon arrival to the emergency department, the patient was found to be in pulseless electrical activity after 5 complete rounds of CPR (including epinephrine, defibrillation, and 30:2 chest compressions to ventilated breaths ratio). The nurse advocates for which intervention?

The nurse is assigned to a patient with malignant hypertension. The patient acutely develops mid-sternal “tearing” chest pain that radiates to the back. Which of the following additional clinical signs is most likely to be present in this patient?

The hospitalized patient is found unresponsive and the cardiopulmonary monitor shows ventricular fibrillation. Upon assessment, no pulse or respiratory effort are appreciated. A code blue is called and the defibrillator is being brought to the room. Which initial intervention is appropriate?