When cardiac arrest strikes, every second counts. The Basic Life Support (BLS) algorithm serves as a systematic approach to emergency care, but its effectiveness hinges on one critical factor: immediate CPR initiation. Understanding why early CPR forms the cornerstone of successful resuscitation can mean the difference between life and death. The Science Behind Early CPR in the BLS Algorithm Cardiac arrest occurs when the heart suddenly stops beating effectively, cutting off blood flow to vital organs. Without intervention, brain cells begin dying within four to six minutes due to oxygen deprivation. This narrow window makes early CPR implementation within the BLS algorithm essential. Research consistently demonstrates that immediate CPR can double or triple survival rates from cardiac arrest. The BLS algorithm emphasizes this urgency by placing chest compressions at the forefront of emergency response. When performed correctly, CPR maintains approximately 25-30% of normal blood flow t...