The American Heart Association updates its CPR guidelines, prioritizing compressions over mouth-to-mouth. Watch a video tutorial on how to give CPR the updated way. WSJ's Christina Tsuei reports.

Performing this procedure can double or triple the chances of survival of the victim. You do not need to be a medical expert ...

But if you want to save someone’s life? Call 911 for that. Voice assistants often fall flat when asked how to perform CPR, according to a study published Monday. Researchers asked voice ...