1. 任何人都有责任在emergency的情况下出手，做力所能及的。无证的可以call 911,守在现场，保护现场。有证的可以做CPR.
2. Consent: 失去意识的成人，可默认为implied consent, 需开始CPR.
对于佩戴DNR (Do not resuscitate) card的人, 不能做CPR.
3. Good Samaritan laws offer legal protection to people who give reasonable assistance to those who are, or who they believe to be, injured, ill, in peril, or otherwise incapacitated.
4. In some jurisdictions, Good Samaritan laws only protect those who have completed basic first aid training and are certified by health organizations, such as the American Heart Association, or American Red Cross, provided that they have acted within the scope of their training. In these jurisdictions, a person who is neither trained in first aid nor certified, and who performs first aid incorrectly, can be held legally liable for errors made.
For untrained people, the A H A web site http://handsonlycpr.org suggests: CPR. A lifesaving action. When an adult has a sudden cardiac arrest, his or her survival depends greatly on immediately getting CPR from someone nearby. Unfortunately, less than 1/3 of those people who experience a cardiac arrest at home, work or in a public location get that help. Most bystanders are worried that they might do something wrong or make things worse. That’s why the AHA has simplified things. Don’t be afraid. Your actions can only help. It’s not normal to see an adult suddenly collapse, but if you do, call 911 and push hard and fast in the center of the chest. Don’t be afraid. Your actions can only help. Take a minute and look around http://handsonlycpr.org and invite your friends! Increasing the number of people who know about “Hands-Only CPR” will increase the chance that someone can help when an adult suddenly collapses, and more lives can be saved.