You are part of a code team responding to a cardiac arrest in a 70-year-old male patient. Upon arrival, the patient is unresponsive, pulseless, and not breathing. The initial rhythm check reveals ventricular fibrillation (VF). High-quality CPR is initiated immediately. After 2 minutes of CPR, the rhythm is checked again and VF persists. According to the advanced life support (ALS) algorithm, what is the next step in the management of this patient?