Reading through this article for myself. Never knew about his heart condition until now:
In the 2009 preseason, he was doing charity work to make sure young athletes got screened for hidden heart conditions. Davis took a group of kids to a Charlotte hospital that had set up free ultrasounds and EKGs. To show it wasn't scary, he got the first screening himself.
Afterward, the doctors pulled him aside and said they needed to talk.
The coronary arteries ship blood away from the heart. In a normal heart, one originates on the left side of the heart, the other on the right. The screening showed that both of Davis' coronary arteries were on the same side. It's not an especially rare condition; maybe 1 in 200 people has it. It often doesn't cause any symptoms. But when doctors find it, they normally recommend correcting it. That means open-heart surgery. And for Davis, that might have meant the end of his career.
The Panthers pulled him out of practice. Davis went to the Emory Heart & Vascular Center in Atlanta for tests. The team sent his medical records to heart clinics around the country. Davis prayed. Eventually, the doctors' consensus was that Davis was in such good condition that he didn't need the surgery. He gets a stress test after every season to double-check.
Amazing that we have such a strong-willed person on this team that embodies the spirit of never giving up. That and his relationship with Beason through rehabs is outstanding.