My 16 year old niece duied out of the blue 2 years ago, the inquest stated that cause of death was Sudden Adult Death Syndrome (SADS). We found out that 12 people under 35 die a week in the UK of undiagnosed heart conditions. It seems hardly a week ogee by when we don't read of a seemingly fit and healthy young person collapsing and dying running a marathon, or on the football field, or just at home like my niece. It seem incredible that more publicity isn't given to this. I don't understand why routine heart screening doesn't occur in school, for,example. I can fully understand the anger of the OP in discovering her DD died of something that might have been preventable. Hopefully your grief can be channelled into,raising more awareness of this. Love and hugs to all of you who have lost children, a sudden death in the family is always unbelievably shocking. 2 years on I can't believe a healthy and vibrant teenager could just be gone.