SILVERTON, Ore. -- A17-year-old Dallas, Oregon, wrestler died of a heart ailment shortly after he won his match Thursday.

The mother of Charley Engelfried said that at around 7 p.m., he had pinned his opponent, shook his hand and his coach's hand, then collapsed while walking off the mat.

A medical examiner on Friday announced the cause of death was Hypertrophic cardiomyopathy.

Hypertrophic cardiomyopathy (HCM) is a condition in which the heart muscle becomes thick, according to the National Institutesof Health.The thickening makes it harder for blood to leave the heart, forcing the heart to work harder to pump blood.The condition is usually passed down through families. According to the NIH, younger people are likely to have a more severe form of hypertrophic cardiomyopathy.

MORE: Hypertrphic cardiomyopathy

A statement from the Silver Falls School District explained Friday that Engelfried was promptly attended to by the athletic trainer and an off duty paramedic, including the use of an AED, and was soon after transported to Silverton Hospital where he was later pronounced dead.

He died doing what he loved, his mother told KGW. He was looking forward to this match, and he pinned his guy.

His mother described him as popular and an all-around athlete; he was a football player and he's been wrestling since seventh grade. He was in the JVprogram of Dallas High School's wrestling program during Thursday night's match at Silverton HS.

His mother thanked everyone for trying to help revive her son, including staff at Silverton HS, emergency room staff at the hospital, and the facility's chaplain.

They were right on the spot helping him, she said. There's lots of love and support, and lots of prayers.

View photos of Charley

Engelfried was a junior at Dallas HS. His mother said he had been talking with a Navy recruiter about going into the armed forces after high school. He eventually hoped to become an athletic director, coaching students like himself.

He loved being active, and he rarely missed practice, she said. He was always proud of his coaches and his teammates.

Student and athlete health and safety are of the utmost concern to the Silver Falls School District, the district's official statement read. At this time our thoughts are with this young man s family, teammates, classmates and the wrestling community as a whole.

Silverton police are investigating but didn't plan to release any information until Friday. Engelfried's mother said that he didn't have any known medical issues, and an autopsy has been scheduled to determine a cause of death.

Engelfried is survived by his parents and a younger brother.

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