The fact that she was "medically cleared" makes me really wonder how exactly she was "cleared." A majority of sudden death in young athletes is caused by a heart condition, often hypertrophic cardiomyopathy, which can cause suspicious findings on EKGs and is generally pretty easily seen on an echocardiogram. This may have had nothing to do with her particular case, but with a prior episode requiring CPR, if nothing less than a full cardiac work-up and other testing were done on her...then this was not only a tragedy, but a preventable tragedy =(.
My thoughts go out to her friends and family in this difficult time.