The Medical Journal of Australia describes the 2nd known case of a Survivor of a Stingray Injury to the Heart (PDF, published in 2001):
"Cardiac injuries from stingray barbs are rare, even worldwide, and all but one have been fatal.
A 33-year-old man was snorkelling at Coogee, a popular Sydney swimming beach, when he was noticed to be in distress."
"Crocodile Hunter" Steve Irwin Killed by Stingray
The Claim: Never Remove a Barb From a Stingray Injury. NYTimes.
Image source: Wikipedia, Creative Commons Attribution ShareAlike 1.0 license, by Dr. Tony Ayling.