Final answer:
When PPV and MR SOPA fail to initiate chest movement or increase heart rate, CPR should be initiated, focusing on high-quality chest compressions at the right rate and depth until professional help or patient recovery.
Step-by-step explanation:
If after performing Positive Pressure Ventilation (PPV) and the MR SOPA sequence, you still cannot raise the heart rate or see chest movement, it is crucial to proceed with cardiopulmonary resuscitation (CPR). CPR is an emergency procedure used to manually pump the heart and maintain blood circulation when the heart has stopped. The proper technique for performing CPR includes positioning one hand on the sternum between the T4 and T9 vertebrae, which aligns with the location of the heart within the thorax, and compressing the chest at least 5 cm deep at a rate of 100 compressions per minute. This rate is famously set to the beat of the song 'Staying Alive' by the Bee Gees, aiding in remembering the correct tempo for chest compressions. Emphasis should be placed on performing high-quality chest compressions to maximize blood flow to vital organs, especially the brain, where irreversible damage can occur rapidly without adequate circulation. CPR should be administered until the patient regains spontaneous heart contractions or is declared deceased by a qualified healthcare professional.