VMI LogoLEXINGTON, 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 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.