TABLE 2

Differentiating Characteristics of Presenting Symptoms of LQTS and Vasovagal Syncope

LQTSVasovagal Syncope
Sudden onset syncopeAura first, followed by dizziness or nausea
During exerciseDuring cooldown after exercise
Swimming, exercise, emotionally, loud noise inducedTypically orthostatic or emotionally induced
May present as convulsive eventMay present as convulsive event