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Most parents of toddlers worry about sleep habits and sniffles, but heart failure isn’t usually a concern.

It certainly wasn’t on the Thomases’ radar when their 2-year-old son went into sudden cardiac arrest in the middle of the night at their Illinois home.

When the child woke up screaming, his parents ran into the room.

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"Hearing him scream out was alarming, as he usually slept soundly, and it was a horrible cry," Stephanie Thomas told Fox News Digital.

"When I went into his room, he continued to scream out and then face-plant into his crib."

At first, the Thomases thought their son was just having a night terror, so Stephanie — who is a clinical dietitian at OSF HealthCare Childr

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