Melissa Ziebell was approaching the final mile of the 2015 Paris Half Marathon, her third ever, on track to break her personal best time of 1:45.
Then her legs seemed to seize up and stop working.
“I realized I was going to fall, and that’s the last thing I remember,” said the Colombian-born Ziebell, who was living in France at the time, working as an optical telecommunications researcher.
Only 33, she’d suffered a cardiac arrest, which occurs when the heart’s electrical system suddenly “short circuits” and the heart stops pumping. Each year, about 356,000 Americans suffer an out-of-hospital cardiac arrest, and the condition is fatal about 90 percent of the time.
Ziebell would likely have become just another unfortunate statistic were it not for the quick thinking of a pair of Red Cross volunteers stationed along the race route.
They started CPR and used an automated external defibrillator, or AED, to shock her heart with an electrical charge. That got it beating again.
Ziebell recalls awakening to the sound of someone calling her name and asking if she knew where she was.
“Kilometer 19,” she replied, rather than the more obvious “Paris, France.”
Then she tried to get up and start running again. After all, she’d been on pace to beat her personal best.
Fortunately, the medical volunteers were able to dissuade her of that idea and had her taken to a nearby hospital.
The cardiac arrest came as a complete surprise. After all, she was in extraordinarily good shape, working out for two to three hours a day, lifting weights and doing cardio, group exercises, kickboxing and roller blading.
Not to mention all the roadwork she did training for the half marathon.
Not only that, but before runners are even allowed to participate in the Paris event, they have to get a note from a cardiologist clearing them to run. Ziebell had gotten such a note.
In the hospital, her doctors determined she had an undiagnosed congenital heart defect. Given