If you or someone nearby knows cardiopulmonary resuscitation (CPR), begin providing it if it's needed.

CNN: Heart arrhythmias

The motion stated that immediate cardiopulmonary resuscitation (CPR) could improve the chance of survival by a factor of three.

BBC: Emergency Life Support Skills

The watchdog concluded that cardiopulmonary resuscitation (CPR) had wrongly become the default setting.

BBC: NHS 'too quick to resuscitate acutely ill people'

But quick cardiopulmonary resuscitation, or CPR, from bystanders or race participants also likely played a role since it can buy time until victims are defibrillated.

WSJ: Runners, Rest Easy: Heart Risks Seem Overblown