Why is early CPR critical in the cardiac chain of survival?

The importance of early CPR in the cardiac chain of survival lies in its ability to help circulate oxygen-rich blood to vital organs when the heart is no longer effectively pumping blood. In cases of cardiac arrest, the heart stops beating, which means blood flow to the brain and other organs ceases. By performing CPR immediately, a lifeguard or bystander can manually pump the chest, maintaining some level of circulation. This action is crucial for preserving brain function and increasing the chances of survival until advanced medical help can arrive. Maintaining blood flow helps to minimize the risk of irreversible damage to organs, particularly the brain, thereby improving overall outcomes for the patient.