AUSTELL, Georgia —  A 45-year-old man died of an apparent heart attack after losing consciousness at the end of the newest roller coaster ride at Six Flags Over Georgia amusement park.

Firefighters were called to the park in Atlanta's western suburbs shortly before noon Thursday to help emergency medical services workers and park employees treat the man, who was in full arrest and not breathing, said Cobb County Fire Lt. Dan Dupree.

The man, whose name has not been released, was taken to a hospital, where he later was pronounced dead, Dupree said.

The man initially was conscious and alert during his ride on the park's newest roller coaster, Goliath, but was unconscious by the end of the ride, Six Flags spokeswoman Christy Poore said.

Poore said park workers stopped the ride, inspected it and reopened it after determining it was operating properly.

Goliath soars 200 feet over the park. The ride lasts just over three minutes and reaches speeds of 70 mph.