LEXINGTON, Va. (AP) — An autopsy has found that a Virginia Military Institute cadet who collapsed during training died from a congenital heart disorder.

Eighteen-year-old Sean Duc Hoang collapsed Sept. 21 while running as part of VMI’s routine physical training. The first-year cadet from Fairfax was pronounced dead a short time later at a hospital in Lexington.

The Roanoke Times (http://bit.ly/1RSL96R ) reports that the state medical examiner’s office concluded that Hoang suffered a fatal arrhythmia, or an abnormal heart rhythm.

A VMI spokesman said the school conducts extensive health screenings of incoming cadets and had no knowledge of Hoang’s heart condition.

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Information from: The Roanoke Times, http://www.roanoke.com