No injured cavers recorded.
On August 22, 1983 a group of cavers entered Rattlesnake Cave in Wilson County, Tennessee. After some time, one caver (20-30) began to experience chest pains. This was thought to be heart trouble so the victim, still in the cave, was given oxygen for a period of time. The local Civil Defense called in Nashville Grotto Rescue. The evacuation was carried out without incident.
Apparently there was no actual heart attack, but how is one to know? One of the group was an EMT and was unable to diagnose correctly. Probably better to be safe and assume the worst. The victim was reportedly in very poor physical condition prior to the incident.
A caver experienced chest pains in Rattlesnake Cave, and was evacuated; it was not an actual heart attack.