ROHNERT PARK (CBS SF) — The Rohnert Park Department of Public Safety resuscitated a 9-year-old student who collapsed at an elementary school Monday morning.

Fire and patrol units responded at 10:23 a.m. to Evergreen Elementary School at 1125 Emily Ave. where they boy collapsed and stopped breathing on the playground, Sgt. Dale Utecht said.

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When police and fire units arrived three minutes later, a teacher had already begun CPR, Utecht said. Public safety officers connected the student to an automated external defibrillator while continuing CPR.

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The AED delivered one shock to the boy to return his heart to the correct rhythm and the boy’s condition began to gradually improve, Utecht said.

The boy had a strong pulse and was breathing on his own when a Sonoma Life Support ambulance arrived to take him to a hospital, Utecht said.

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