Man Survives 47-Minutes of Death

I'd like to know more about this part:

A specific procedure helped save Tiralosi's life. Special cooling pads, not available in all emergency rooms, lowered his body temperature to 91 degrees, essential in preventing long-term neurological damage and preserving brain function. Placed in a medically induced coma, incredibly, he began to wake up three days later -- without brain damage.

The story isn't clear about whether they put him into a coma during or after they spent 47 minutes on compressions.