VIRGINIA BEACH, Va. (AP) — A medical examiner has determined that a heart rhythm problem caused the death of a teenager who collapsed after completing a half-marathon in Virginia Beach.

The Virginian Pilot (http://bit.ly/1koIMUW ) reports that the Tidewater medical examiner’s office found that 16-year-old Cameron Gallagher died of cardiac arrhythmia.

The Richmond teenager collapsed after crossing the finish line at the Shamrock half-marathon in March. She was taken to a hospital, where she died.

Gallagher’s father, David Gallgher, tells WRIC-TV (http://bit.ly/1kVx9Vw ) that she competed on a swim team, ran with her family and played basketball as a child, and didn’t have any symptoms of any heart conditions.

He says the family wants to have genetic testing done to see whether Cameron’s siblings might have any conditions.

Copyright 2014 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.