The signs of cardiac arrest include sudden loss of responsiveness, absence of normal breathing, and no pulse or heartbeat. The person may also become pale or blue in color.

Yes, CPR can be performed on a person who has drowned. In fact, drowning is one of the most common causes of cardiac arrest in children. It is important to start CPR as soon as possible to increase the chances of survival.

The recommended compression-to-breath ratio for CPR is 30 compressions to 2 breaths. This ratio should be maintained until help arrives or the person starts breathing normally.