It depends on how you perform it, but even if you do do it right, it might hurt them a little.
If you are CPR certified, you should have someone call 911 while you start CPR. If you are not CPR certified, find someone around you that is.
You don't have to know CPR to baybsit; however, it would be a very good thing if you do know how to perform CPR. Also, many parents would prefer someone who is trained in CPR to babysit their children over someone who is not trained in CPR.
CPR should be used if someone is unconscious and cannot breathe.
Yes, CPR and defribrillation will work on someone with a mechanical mitral valve.
It is possible to get sick by performing CPR on someone, especially when doing rescue breaths. Hands-only CPR is an alternative which involves chest compressions which reduces that risk. Also, if someone has been dead for hours, performing CPR on them would be pointless.
When someone is not breathing and does not have a pulse
No, CPR isn't performed any differently if patient has a defibrillator.
For giving CPR, an adult is defined as someone over the age of 12 by the American Red Cross.
Can't hurt to try.
With CPR
In CPR class you will learn how to resuscitate an individual who has stopped breathing. It is extremely important because proper CPR can save someone's life.
Do not stop CPR to check for signs of life in Adult CPR. Continue CPR until help (EMS) arrives or someone takes over.