Answer:
Step-by-step explanation:
The recommended compression-ventilation ratio for 2-rescuer adult CPR is 30 compressions to 2 ventilations. This ratio applies to adult cardiac arrest victims who are not breathing or only gasping and are unresponsive. The compressions should be done at a rate of 100 to 120 per minute, with a depth of at least 2 inches (5 cm) for each compression. The ventilations should be given over 1 second, with enough volume to produce visible chest rise. It's important for the two rescuers to switch roles every 2 minutes to avoid fatigue and maintain the quality of CPR.