There are many different kinds of abnormal heart rhythms that may occur in children and adults. Learn about the types of arrhythmias that may occur and how they might manifest in children. If an abnormal rhythm occurs, it's important to find out what kind it is. Treatment recommendations depend on its type. Arrhythmias can cause the heart rate to be irregular, fast or slow (View an animation of arrhythmia). Fast rhythms are called tachycardia. Slow ones are called bradycardia.
This content was last reviewed September 2016.