A San Tan Valley teenager thanked the lifeguards and first responders who saved her life after her heart stopped while she was swimming at Golfland Sunsplash in Mesa.

It happened two weeks ago during 16-year-old Chloe Larson’s first trip to the popular water park near Southern Avenue and Mesa Drive.

She was there with a church group. Larson said the only thing she remembers after going down a water slide is waking up in the hospital.

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“I was on The Cauldron, but coming out is just a blur,” she explained. “I don’t really remember.”

Serenity Kosorok, an 18-year-old lifeguard at the water park, does remember.

She saw Larson come out of the slide, which features a drop of more than four stories, and swim to the side of the pool. She was worried when Larson stopped moving and didn’t get out of the water.

“When she didn’t take the rescue tube, I was like, ‘K, something’s wrong,” Kosorok said.

She blew the whistle, to bring a team of lifeguards to Larson’s aid and had the water on the slide stopped.

The lifeguards put Larson on a backboard, got her out of the water and had started CPR before the Mesa Fire and Medical Department got there.

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“I’m so thankful for all of them,” Larson said. “Being here was a miracle.”

Larson has a heart condition that requires her to use a pacemaker. Her doctors are not sure what caused her emergency, but they have replaced her device.

"They either think it's genetic or settings were wrong on the pacemaker,” she said.

Although the situation was scary for Larson, she said she has plans to go back to Golfland Sunsplash and hit The Cauldron again.

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