Abnormal heart rhythms (arrhythmias) are caused by problems with the electrical system that regulates the steady, rhythmic beat of the heart. Over 10 million people in the US suffer from arrhythmias, which can lead to heart disease, stroke or sudden death.
For those interested in learning more about the condition and available treatments, multiple websites provide good background information including:
Heart Rhythm Society Wikipedia Definition Arrythmia Aliance Blaufuss.org
