Why do CPR before AED arrives?

There are a few reasons why CPR should be performed before an AED arrives:

1. CPR provides immediate circulation of oxygenated blood to the heart and brain. When someone goes into cardiac arrest, their heart stops beating and they stop breathing. This means that their body is not getting the oxygen it needs to function. CPR helps to circulate oxygenated blood throughout the body, which can help to keep the heart and brain alive until an AED arrives.

2. AEDs are not always immediately available. In many cases, it can take several minutes for an AED to arrive on the scene. If CPR is not started immediately, the person's chances of survival can decrease significantly.

3. AEDs are not always effective. AEDs are not always able to restore a person's heartbeat. In some cases, CPR may be the only way to save a person's life.

4. CPR can help to buy time until an AED arrives. Even if an AED is on its way, CPR can help to keep the person alive until the AED arrives. This can give the person a better chance of survival.

For all of these reasons, it is important to start CPR immediately if someone goes into cardiac arrest. CPR is a simple and effective way to help save a life.