Why is defibrilltion an important step in the cardiac chain of survival?

Defibrillation is crucial in the cardiac chain of survival because it delivers an electric shock to the heart, allowing it to re-establish a normal rhythm during life-threatening arrhythmias, like ventricular fibrillation. Rapid defibrillation increases the chances of survival significantly, as every minute without it decreases the likelihood of a favorable outcome. This timely intervention, combined with CPR, can restore effective circulation and improve overall survival rates in cardiac arrest situations.