Changes

An '''arrhythmia''' is any disorder of a person's [[heart]] rate or rhythm. Their heart beats too quickly, too slowly or with an irregular pattern. When the heart beats faster than normal, it is called '''[[tachycardia]]'''. When the heart beats too slowly, it is called '''[[bradycardia]]'''.

An '''arrhythmia''' is any disorder of a person's [[heart]] rate or rhythm. Their heart beats too quickly, too slowly or with an irregular pattern. When the heart beats faster than normal, it is called [[tachycardia]]. When the heart beats too slowly, it is called [[bradycardia]].

Many factors can affect the heart's rhythm, such as having a [[heart attack]], blood chemistry imbalances or abnormal [[hormone]] levels. Some substances or medicines may also cause arrhythmia.

Many factors can affect the heart's rhythm, such as having a [[heart attack]], blood chemistry imbalances or abnormal [[hormone]] levels. Some substances or medicines may also cause arrhythmia.