Final answer:
CPR is an emergency technique used to maintain blood flow if the heart stops. It involves manually compressing the chest to push blood within the heart into the circulation. Artificial respiration is not the primary focus during CPR.
Step-by-step explanation:
CPR, or cardiopulmonary resuscitation, is an emergency technique used to maintain blood flow if the heart stops. It involves manually compressing the chest to push blood within the heart into the circulation. The compression should be performed with the flat portion of one hand on the sternum between the line at T4 and T9, with a depth of at least 5 cm and a rate of 100 compressions per minute. Artificial respiration is not the primary focus during CPR. It should be continued until the patient regains spontaneous contraction or is declared dead by a healthcare professional.