- How effective is CPR? ❤️ CPR (cardiopulmonary resuscitation) is an emergency technique used when the heart stops. Chest compressions manually pump blood around the body, delivering oxygen to vital organs — especially the brain — and buy time until a defibrillator or advanced care arrives. 📊 The stats: • Early, high-quality CPR can double or even triple survival from cardiac arrest • Survival drops by ~7–10% for every minute without CPR or defibrillation • Brain injury can begin after 4–6 minu