Here's an encouraging story from a young long-distance runner and sufferer of pericarditis... http://www.mdjunction.com/forums/pericarditis-discussions/introductions-personal-stories/10805501-16-year-oldlong-distance-runneracute-pericarditis
Livestrong has some general guidelines... http://www.livestrong.com/article/425516-exercising-after-pericarditis/
