Friday, June 30, 2006; Posted: 2:15 p.m. EDT (18:15 GMT) MIAMI, Florida (CNN) -- The boy who collapsed and died after riding a Disney roller coaster ride had a congenital heart abnormality, according to preliminary autopsy findings released Friday.
"No evidence of injury was found," the report from the medical examiner's office said. "The cause of death will be left pending until results of additional studies are obtained."
Michael Russell, 12, of Fort Campbell, Kentucky, collapsed after riding the Rock 'N' Roller Coaster ride at Disney-MGM theme park in Orlando, Florida, Thursday morning, Sgt. Carlos Torres said. (Watch the details of what happened after the roller coaster stopped -- 2:39
Russell's father began administering CPR and was later aided by a Disney assistant, but the boy was not responsive. Russell was then transported by ambulance to Celebration Hospital, where he was pronounced dead.
A Disney representative was with the family Thursday afternoon and Disney officials were offering the boy's family their "deepest sympathies," according to a statement.
Pending the release of the autopsy results, the Rock 'N' Roller Coaster re-opened Friday morning. "Walt Disney World engineers and ride system engineers completed a thorough inspection of the attraction overnight and found it to be operating properly," said Disney spokeswoman Kim Prunty in a statement.
Disney boasts of the ride on its Web site, "Zoom from 0 to 60 mph with the force of a supersonic F-14, take in high-speed loops and turns synchronized to a specially recorded Aerosmith soundtrack and zip through Tinseltown in the biggest, loudest limo you've ever seen."
It adds: "The 3,400-foot-long track is more than a half mile of sudden accelerations, dips, loops and twists and turns."
Children shorter than 4 feet are not permitted on the ride, according to the Web site.
The last death at a Disney resort was April 12, when 49-year-old Hiltrud Bluemel of Germany suffered a stroke linked to her high blood pressure after riding "Mission: Space" at the Epcot Center in Lake Buena Vista, Florida.
Five months before that, a 4-year-old boy died from an unknown heart condition on the same ride.