A 70-year-old man presented to the emergency department in cardiac arrest. The cardiac monitor showed ventricular fibrillation. As a junior doctor, the respondent's task was to prepare the defibrillator. This involved: 1) switching on the machine and setting it to 200J; 2) opening the defibrillator pads and having an assistant apply gel; 3) placing the pads in the correct positions on the patient's chest; 4) shouting warnings before delivering shocks; and 5) reassessing the patient's rhythm after shocks and resuming chest compressions.
An elderly man was found unresponsive in a parking lot. As a junior doctor on scene, the respondent's immediate actions were to: