Healthy runner suffers sudden stroke at 27 as doctors discover possible cause

Patrick Mascoli, 27, suffered a stroke while running 40 miles per week. Doctors identified a patent foramen ovale, a heart condition in which an opening between two chambers fails to close after birth, as the likely source of a blood clot that reached his brain.

• Fox News — Healthy runner suffers sudden stroke at 27 as doctors discover possible cause

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