BelfastChild, Thanks for your comments!
I was reading few more research papers on Short QT and all of them consider it to be short below 300 so I guess I am on safe side.
One research paper indicated that short QT should be taken more seriously if there is a family history. In that case, I am again saved!!!
Another interesting thing is not many are posting their comments so I guess its not a very common thing!
I would post my recent ECG result as soon as I get it done.
I wonder Rhov had any more to add? Any suggestion before I go for ECG!?