Hi, I have infrequent palpitations and occasional lightheadedness. I am very fit and a young athlete, but I recently took some tests to finally figure out why I've had these palpitations all my life. On my Holter study it showed a slightly high QTc interval of around 453ms. (another sheet said 448ms). I understand that anything above 430-440ms is borderline and possibly indicative of long qt syndrome. So, I was just wondering regarding long qt syndrome, if it is what I have and it is a gene inheritance deal is sleeping a trigger of symptoms and problems for people with LQT1 and LQT2, or is that just with the rarer LQT3.? I tend to think I might have LQT1 because I am deaf in one ear. I'm just a little worried about sleeping, at least before I get the medicines I would need to control it if they end up diagnosing it as such. I have temporarily ceased my running training (I was due for my post-spring season week break anyways) as of two days ago until we figure this out, so I'm not worried about provoking an arrhythmia from exercise right now. Also, given that I am an athlete, if this does turn out to be a case of LQT1 would it be most advisable to talk with my cardiologist about maybe looking into an ICD? I would really rather not give up my athletic career if I don't have to and I heard that ICD's allow people to continue with things like running since they are 99% effective at stopping fatal arrhythmias. Thanks.