Arrhythmia is the irregularity of heartbeats. A heart should beat just like seconds hand of a clock. Those who are the victims of arrhythmia experience fast or slow heartbeats very often. Some times arrhythmia don't cause any problem. They don't need any specific treatment. Some Arrhythmia is serious. A child with serious Arrhythmia needs a regular checkup. It is hard for such a child to participate in some sports activities. A child with serious arrhythmia may need medicines, Some regular test, radiofrequency ablation, a device or surgery.