“…V VS occurs in 33% to 80% of children with syncope. 624,628 Risk factors that raise suspicion of a cardiac etiology include the absence of prodromal symptoms, presence of preceding palpitations within seconds of loss of consciousness, lack of a prolonged upright posture, syncope during exercise or in response to auditory or emotional triggers, family history of SCD, abnormal physical examination, and abnormal ECG, 626,627 although the specificity is modest. 618,627,630,633 It should be remembered that children may not be able to clearly communicate specific symptoms.…”