Cardiopulmonary Resuscitation (CPR) Practice

In a cardiac arrest scenario, performing CPR is critical because it significantly increases the chances of survival for the victim. When a person's heart stops, blood flow ceases, which means vital organs, especially the brain, begin to suffer from oxygen deprivation. CPR helps maintain circulatory flow by manually compressing the chest, allowing blood to circulate to the brain and other vital organs until professional help arrives.

Calling for help is indeed important, as it ensures emergency medical services are on the way. However, just calling for help without performing CPR does not provide any immediate aid to the victim. Time is of the essence in such situations, and every moment without adequate blood flow increases the risk of irreversible damage or death. Therefore, CPR serves as a life-saving measure that can sustain life during the critical minutes before professional medical assistance arrives.

Thus, while it's essential that both actions—performing CPR and calling for help—happen, the act of performing CPR is what directly contributes to saving lives in that immediate situation.