If someone young and healthy collapses, the treatment is a no-brainer. As we age or suffer serious health problems, there may come a point where it would do more harm than good.

For the more than 350,000 Americans each year who suffer cardiac arrest outside of a hospital, the prognosis is not always an optimistic one. But quick action with CPR and a defibrillator can be key.

Tevita Bryce may not have survived when he went into cardiac arrest in the middle of a rugby game last weekend. But with help from the opposing team and fans, he's now in recovery.