Children, like adults can also be at the receiving end of abnormal heartbeats, or arrhythmias which can lead to life-threatening emergencies like a cardiac arrest. The various types of Arrhythmias in children include: I. Long QT Syndrome (LQTS) II. Tachycardia (Sinus Tachycardia, Supraventricular tachycardia) III. Wolff-Parkinson-White Syndrome (WPW) IV. Ventricular tachycardia V. Bradycardia VI. Sick Sinus Syndro...