What is a critical time frame for performing CPR to increase the chances of survival in cardiac arrest cases?

Performing CPR within 5 minutes of cardiac arrest is critical because the brain and other vital organs start to suffer irreversible damage when deprived of oxygen. During cardiac arrest, the heart stops pumping blood, and if effective CPR is not initiated quickly, the chances of survival decrease significantly. The 5-minute window is referenced in medical guidelines as a period during which prompt action can maintain blood circulation and oxygen delivery to the organs, providing the best chance for a successful resuscitation.

In contrast, waiting longer than 5 minutes can significantly reduce survival rates, as the deterioration of organ function and brain cells accelerates. This timeframe emphasizes the importance of immediate response and the role of bystanders and first responders in initiating CPR as soon as possible.