An autopsy of Hiltrud Blümel, 49, showed "severe, long standing high blood pressure," Dr. Jan Garavaglia -- chief medical examiner for the District Nine Medical Examiner's Office in Florida -- said in a statement released Friday afternoon, the Orlando Sentinel reported.

Blümel summoned help at 1:19 p.m. Tuesday, shortly after completing the 4-minute thrill ride at Epcot theme park that spins up to 160 customers at twice Earth's gravity, on a mock space flight to Mars, records show.

She died Wednesday at Florida Hospital Celebration Health, Disney spokesmen said.

The death is the second within a year associated with the $100 million ride.

Last June, Daudi Bamuwamye, 4, of Sellersville, Pa., died while riding with his mother and sister. An autopsy showed that he suffered from a rare and undiagnosed enlargement of his heart.