Chris Pronger is one of the greatest hockey defenders ever, but perhaps he's more known for his own terrifying in-game medical emergency ... the former NHL MVP suffered commotio cordis after taking a slapshot to the heart during a playoff game in 1998.
TMZ Sports talked to the retired 48-year-old NHL great about the parallels between him and Damar Hamlin ... as many physicians have theorized the 24-year-old Bills safety also experienced the extremely rare heart issue.
"I got hit with a slapshot literally right in the heart and in between beats and that's called commotio cordis where you get hit in between beats.