A 10-year-old girl on an outing with her family died while riding a waterslide, and her mother believes her excitement about the ride may have triggered a previously unknown condition.

As reported by the New York Post, London Eisenbeis died in February 2018 while on a waterslide at  Zehnder’s Splash Village in Frankenmuth, Michigan. Her mother gave an interview to The Sun, saying she believed her daughter’s excitement at finally being tall enough for the ride contributed to her death.

“London looked at her dad, gave two thumbs up and smiled, went down the slide and came out in cardiac arrest,” Tina Eisenbeis reportedly told The Sun. “The excitement threw her rhythm.”

“The slide she went down has a heartbeat sound at the top that my husband said made it even scarier … Who would have ever thought she would come out the bottom without one?”

London reportedly appeared to be in perfectly good health before the ride.

“The day before, she had been doing flips in the air,” her mother told the outlet.

The family has since learned that London had Long QT syndrome, which reportedly causes rapid and irregular heartbeats and sudden fatalities.

“There were no signs of the condition, she just dropped,” London’s mother told The Sun. 

London survived on life support for several days, but eventually passed away in the hospital.

[Feature image: London Eisenbeis/GoFundMe]