Also, be sure to inform all your doctors that you suffer from this condition, especially before taking antibiotics, allergy
drugs or
anti anxiety drugs, which often affect the QT interval.
Also remember to seek immediate medical assistance if you feel severe palpitations, fainting, etc, and see your doctor if you experience an increase in PVCs. As you probably are aware of, LQTS can predispose for a serious arrhythmia.