Various types of arrhythmias exist depending on what part of the heart
is affected and how they originate. The causes of arrhythmia also vary
but can generally be divided into two categories: malfunctions in the
electrical impulses that cause the heart muscle to beat; or physical
problems with the heart, such as atherosclerosis, damage from a heart
attack, or congenital heart defects. Lifestyle may also play a role in
the development of arrhythmia.