When Percy Harvin collapsed on the Vikings' practice field on Aug. 19, complications from migraine headaches were immediately suspected.
According to Andrea Kremer of NBC, Harvin's heart stopped for 10 seconds after he was taken to the hospital following that incident. Harvin was on the practice field for about a half hour with emergency medical technicians tending to him before he was taken to a local hospital in an ambulance.
According to NBC, Harvin underwent an overnight sleep test four days after his release and he said his heart stopped beating eight times during that test. At that point, he was diagnosed with sleep apnea, a disorder that alters breathing during sleep. Harvin told NBC that the disorder is the "main issue triggering the migraines," according to the NBC report.
After Harvin collapsed on the practice field last month, his teammates showed their concern. Tackle Bryant McKinnie said that incident drove home the seriousness of Harvin's medical issues with his teammates.
"I think by this happening it kind of lets the team know exactly how hard it is. Because a lot of times it doesn't take place in front of us. So now by people actually seeing it, they see it's really not a joke," McKinnie said about an hour after Harvin collapsed.
"Some of us knew for real that he was really suffering from it. Maybe some other people in some of their minds they weren't sure, but I think they are awake now to see how serious it is."
Like many sleep apnea patients, Harvin is now sleeping with a medical device that pumps air into his nose to regulate his breathing. According to NBC, he brings the device on the road and slept with it Wednesday in New Orleans.
Harvin also told NBC that he has stopped taking medication for the migraines, and said the medication caused his collapse.
Just last week, Harvin said stress, changes in the weather, diet, activity and pollen can be triggers for the migraine attacks.
"There's no miracle solution for it," Harvin said. "The people I've talked to have had them for 40 years and my mom had them for 35 years. She's just now getting out of them. It's just something you hope to maintain and playing contact football may not be the best thing for that."
Tim Yotter is the publisher of Viking Update. Follow Viking Update on Twitter and discuss this topic on our message boards. To become a subscriber to the Viking Update web site or magazine, click here.
Report: Harvin's heart stopped
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