An arrhythmia (also called dysrhythmia) is an abnormal rhythm of the heart, which can cause the heart to pump less effectively.
Arrhythmias can cause problems with contractions of the heart chambers by:
not allowing the ventricles (lower chambers) to fill with an adequate amount of blood, because an electrical signal is causing the heart to pump too fast.
not allowing a sufficient amount of blood to be pumped out to the body, because an electrical signal is causing the heart to pump too slowly or too irregularly.
For more information or irregular heart beats in children or to schedule an appointment, call St. Louis Children's Hospital at 314.454.5437 or 800.678.5437 or email us.