I'm so sorry for your loss Alie, I haven't heard about Gitelman's Syndrome, but my husband's eldest son from his 1st marriage died from a more common condition, Cardiomyopathy this was a sudden death completely out of the blue. Having a heightened awareness of this condition since, I have read about quite a few young people who have collapsed suddenly and died, often playing sport, Fabrice Muamba, the young footballer was one, although thankfully he survived due to the intervention of a doctor in the crowd. I only know second hand the pain of losing a child and I know it's a long process coming to terms with that, everyone deals with it in a different way I guess and eventually the pain subsides although the loss will always be there. 