Girlie—
Here is some info I found when I was dx with LQT a couple wks ago. I, too, am very nervous. My LLMD took me off Ketoconazole immediately and a few posters here told me it was serious and I needed to find a cardiologist, which I am doing. Another poster (sorry—cannot remember who—maybe Razzle) and I emailed and he was thinking it was some of the other supplements I was taking.
I did query my family and those who bothered to answer my email are not aware of LQT in the family but lots of other heart issues. I'm still looking for ways to analyze my DNA for any genetic predisposition.
Hope this helps:
/www.crediblemeds.orgwww.qtsyndrome.ch/drugs.htmlflash.lymenet.org/scripts/ultimatebb.cgi?ubb=get_topic;f=1;t=064297;p=0www.jpeds.com/article/S0022-3476(05)01125-X/abstractwww.healingwell.com/community/default.aspx?f=30&m=3299929-p