Why is rapid defibrillation important for survival

Early defibrillation has been called the critical link in the Chain of Survival because the time from collapse to defibrillation often is the key indicator of survival from sudden cardiac arrest. But the strength of the early defibrillation link depends on the strength of the the links that precede it.

1- a    2 - d3 - e4 - f5 - c6 - g7 - h8 - b