Cardiac arrest
Cardiac arrest is a term used to describe a collapsed casualty who is unconscious, unresponsive, not breathing normally (or at all) and not moving.
A sudden cardiac arrest occurs suddenly and without warning. Not to be confused with a heart attack (which is caused by a blockage that stops blood flow to the heart) during a cardiac arrest the heart stops beating. The best way to increase the chance of saving sudden cardiac arrest casualties, outside of a hospital setting, is to follow every link in the chain of survival.
Signs and symptoms
Loss of consciousness
Little or no breathing
No pulse
First aid - Chain of survival
When to stop CPR - A first aider should continue cardiopulmonary resuscitation until:
The casualty responds or begins breathing normally
It is impossible to continue (e.g. exhaustion)
Someone else can take over CPR
A health care professional directs CPR to be ceased