Haylee Wrenn was dead by the time she hit the ground at a Greenmeadows pharmacy in June.
The Puketapu mother's heart stopped beating for no apparent reason.
She was clinically dead for about five minutes as her primary-school-aged children, Alex and Olivia, watched pharmacy staff and neighbouring doctors perform cardio-pulmonary resuscitation (CPR) and use a defibrillator until a St John ambulance arrived.
Mrs Wrenn said if it had happened at home it is unlikely she would be here now.
"I was just lucky I was in town that afternoon," she said. "I shouldn't have been, but circumstances took me there. "Completely healthy people can die for no reason - there is no reason for why my heart stopped that day. I was only 37 and living a healthy lifestyle - doing everything right - it just happened. It can happen to anyone."