Final answer:
CPR is an emergency technique used when the heart stops. It involves manually compressing the blood within the heart to maintain blood flow to vital organs. The recommended technique includes chest compressions at a specific depth and rate.
Step-by-step explanation:
CPR, or cardiopulmonary resuscitation, is an emergency technique used when the heart of a patient stops. It involves manually compressing the blood within the heart by applying pressure to the sternum, which helps push blood into the pulmonary and systemic circuits. This is crucial for maintaining blood flow to vital organs, including the brain, to prevent irreversible damage and death of neurons. The recommended technique for CPR includes performing chest compressions at a depth of at least 5 cm and a rate of 100 compressions per minute. Artificial respiration may not be emphasized at this stage, and CPR is typically continued until the patient regains spontaneous contraction or is declared dead by a healthcare professional.