Final answer:
During CPR, position the person in cardiac arrest on a firm, flat surface for effective chest compressions.
Explanation:
During CPR, the person in cardiac arrest should be positioned on a firm, flat surface to ensure proper chest compressions. The sternum must be pressed between the lines at T4 and T9, compressing the heart and maintaining blood flow to vital organs. It is crucial to focus on high-quality chest compressions rather than providing artificial respiration.
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