Upon recognizing cardiac arrest, what should Dr. Dave do immediately?

Beginning CPR immediately is the most crucial action upon recognizing cardiac arrest. This is because the brain and other vital organs begin to suffer damage within minutes without adequate blood flow; thus, timely intervention is essential. CPR helps maintain some level of blood circulation and oxygenation to vital organs, which can significantly improve the chances of survival until advanced medical help arrives.

Initiating CPR also sets into motion the chain of survival, which includes quickly summoning emergency assistance. While checking for vitals, administering oxygen, or calling for help are all important aspects of responding to a cardiac arrest situation, none of these actions should delay the start of chest compressions. Time is of the essence, and effective CPR must be prioritized immediately to optimize the patient's chances of recovery.