Host: What could result if treatment is delayed?
Robert O'Connor: Well, once the heart stops which is what happens with cardiac arrest. Essentially when cardiac arrest occurs it results in clinical death. If there is not some intervention, so it's a high stakes event when that happens. Within 4-6 minutes without treatment a person will not survive though under -- though suffer from brain death at that point. So when someone has cardiac arrest, it's important that a bystander start performing CPR.
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