Little Girl Dies While Halfway Down A Water Slide

London Eisenbeis, 10, died while travelling down a 270-foot water slide in Frankenmuth, Michigan.

She died tragically from an underlying heart condition her parents were unaware of.

London was travelling down the 270-foot water slide in Frankenmuth, Michigan when she went into cardiac arrest.

The little girl had Long QT syndrome, which can cause serious irregular heart rhythms.

Eisenbeis has been waiting years to be tall enough to participate in the Super Loop Slide in Zehnder's Splash Village.

London's mother, Tina, was on the other side of the park when the tragic event unfolded, she overheard a woman saying someone has drowned and quickly ran over to the slide.

READ MORE: 'Cloud Atlas' Actress Dies At Age 16

READ MORE: Aussie Teen Who Died In Austrian Avalanche Identified

"London looked at her dad, gave two thumbs up and smiled, went down the slide and came out in cardiac arrest," her mother said. "The excitement threw her rhythm," she told The Sun.

Tina said the particular slide London had gone down has a 'heartbeat sound' that made it even 'scarier'.

Eisenbeis filmed a selfie video just 45 minutes before her sudden cardiac arrest.

Doctors told Eisenbeis' family she had suffered severe brain damage due to a lack of oxygen following her first cardiac arrest at the water park.