Which of the following is essential in the EMS response to cardiac arrest?

Immediate initiation of high-quality CPR is essential in the EMS response to cardiac arrest because it significantly increases the chances of survival and improves the likelihood of a favorable neurological outcome for the patient. High-quality CPR helps maintain blood flow to vital organs, particularly the brain and heart, until advanced medical interventions can be provided.

Promptly starting CPR immediately assists in preventing brain damage and maintaining some level of circulation, which is critical when the heart is not effectively pumping blood. In scenarios of cardiac arrest, each minute that passes without CPR reduces the chances of survival significantly, highlighting the importance of acting without delay.

This practice aligns with current guidelines from organizations such as the American Heart Association, which emphasize the need for early and effective CPR as a cornerstone of emergency cardiovascular care. While other options might be part of a broader response strategy, none are as immediately vital as initiating high-quality CPR.