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    New Worries for Roller Coaster Riders

    WebMD Health News

    Jan. 10, 2000 (Atlanta) -- When they tackle the giant rides, roller coaster lovers could be risking a form of brain injury called subdural hematoma, which causes unrelieved headaches, according to a report published by the American Academy of Neurology.

    "This type of ride induces up-and-down, to-and-fro, and rotatory acceleration, which [ruptures blood vessels in the brain]," says lead author T. Fukutake, MD, of Ciba University School of Medicine in Japan. The findings "support [previous studies] that ... the acceleration forces associated with roller coaster rides causes the tearing of bridging veins resulting in subdural hemorrhage ... leading to chronic subdural hematoma."

    Generally, hematomas occur in older people, and are three times as common in men. The disorder is typically caused by mild but direct head injury, but in 25 to 50% of hematoma cases, there is no history of head trauma, says Fukutake.

    The paper cites several recent cases of roller coaster-associated hematomas that have occurred in Japan. Among them is a 26-year-old man who developed hematomas after riding a double-loop, corkscrew-type roller coaster. A 64-year-old man with hypertension had headaches after his first roller coaster ride and developed a hematoma after 11 more rides. In both cases, the hematomas were successfully removed with surgery.

    However, a 73-year-old man who had been taking Coumadin (warfarin), a blood thinner prescribed to treat heart disease, developed hematomas five days after a roller coaster ride. Despite surgery, he died 13 days later.

    While a subdural hematoma is rare in young women, a 24-year-old Japanese woman developed one after riding three different roller coasters -- each twice -- in one day. One of these was 'Fujiyama,' one of the world's highest (259 feet high) and fastest (81 mph).

    The young woman had no head injury and did not lose consciousness during the rides, but after riding she had a constant headache that became worse in the evening. First diagnosed as tension headaches -- she did not mention the roller coaster rides to her doctor -- an MRI two months later showed hematomas, which were surgically removed and left her headache-free.

    "Riding roller coasters can cause chronic subdural hematomas even in a previously healthy woman," says Fukutake. "Builders and designers, managers of amusement parks, and potential passengers on giant roller coasters need to be aware of this risk."

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