The QT interval is hard to read sometimes and it does take
some experience. It is helpful that there is not family histor
y of sudden death, seizures, drownings or sudden infant death syndrome. If there is any questions, it is always worth seeing a cardiologist. Sometimes a simple exercise stress test will help answer the question.
Murmurs are not related to long
QT syndrome. Even if she had a murmur, not all murmurs are bad.
I hope this helps. Thanks for posting.