Final answer:
In the case of Annie collapsing without a pulse but gasping, immediate administration of CPR is critical. Perform chest compressions at the rate of 100 per minute to the tune of 'Staying Alive'. Continue until help arrives or Annie recovers.
Step-by-step explanation:
If you see your friend, Annie, collapse and she is unresponsive and gasping without a pulse, you should act quickly. This is a sign of cardiac arrest, which is a critical emergency where the heart stops pumping blood effectively. Your immediate task is to perform cardiopulmonary resuscitation (CPR). Position yourself next to Annie, place the flat part of your hand on her sternum in line with her nipples, and begin chest compressions. Remember to compress at least 5 cm deep and at the tempo of the song 'Staying Alive' by the Bee Gees, which translates to about 100 compressions per minute. It's essential to continue high-quality chest compressions and avoid unnecessary interruptions until emergency medical services arrive or Annie regains a pulse and starts breathing independently.
If you're untrained in administering CPR, you should still attempt chest compressions or seek help from someone nearby who is trained. In situations with severe choking, quick intervention is necessary as the brain can sustain irreversible damage within minutes due to lack of oxygen. As a bystander, your actions can significantly affect the outcome, so be prepared to help and direct others to call emergency services immediately.