The recommended rate for chest compressions during CPR is 100-120 compressions per minute. This rate allows for adequate blood flow to the heart and brain.

Chest compressions during CPR should be 2-3 inches (5-7.5 cm) deep. This depth allows for adequate blood flow without causing damage to the heart or ribs.

The ratio of chest compressions to rescue breaths during CPR is 30:2. This means that for every 30 chest compressions, two rescue breaths are given.

Each rescue breath during CPR should last approximately 1 second. This allows for adequate air to be delivered to the lungs.

An AED should be used as soon as possible after starting CPR, if one is available. The AED can analyze the heart rhythm and deliver an electric shock if necessary.

To use an AED during CPR, turn on the AED and follow the voice prompts. Attach the AED pads to the person's chest and press the shock button if the AED advises it.

The most common cause of sudden cardiac arrest is a heart attack, which occurs when blood flow to the heart is blocked.

CPR can be performed by anyone who is willing to help, even if they have not received formal training. However, it is important to note that trained individuals are more likely to perform CPR correctly and effectively.

The recommended age to start learning CPR is 12 years old. This allows individuals to learn the skills and techniques necessary to perform CPR in an emergency situation.

CPR training should be refreshed every two years to ensure that individuals retain the skills and techniques necessary to perform CPR effectively.

The recommended compression-to-ventilation ratio for infants during CPR is 30:2, just like for adults.

Chest compressions for infants should be 1-1.5 inches (2.5-3.8 cm) deep, which is about one-third of the depth of the chest.

The recommended rate for chest compressions during CPR for children is 100-120 compressions per minute, the same as for adults.

Chest compressions for children should be 2-2.5 inches (5-6.3 cm) deep, which is about one-third of the depth of the chest.

The recommended compression-to-ventilation ratio for children during CPR is 30:2, the same as for adults.