Final answer:
The acronym CPR stands for Cardio Pulmonary Resuscitation, an emergency technique used to manually compress the heart to maintain blood flow when a person's heart stops beating.
Step-by-step explanation:
The acronym CPR stands for Cardio Pulmonary Resuscitation. This is an emergency technique used when a person's heart stops beating. The procedure entails applying pressure with the hand on the sternum, specifically in the area between the thoracic vertebrae T4 and T9, to manually compress the heart to maintain blood flow, especially to vital organs like the brain. High-quality chest compressions are emphasized over artificial respiration in current CPR standards. A trained healthcare professional should perform CPR until the heart starts beating again spontaneously or until a declaration of death is made.