Zipcodes in Twentynine Palms, CA (San Bernardino County) Cities in San Bernardino County, CA. * Not found in the U.S. Census 2000 data. Location may not be an incorporated place or boundary may be approximate.
About Arrhythmia. An arrhythmia is an abnormal heart rhythm. Learn about the heart's structure and why abnormal heart rhythms may cause problems. Read more.
An arrhythmia (also known as dysrhythmia) is any disorder of the heart rate or heart rhythm, such as beating too fast (tachycardia), too slow (bradycardia), or irregularly . Some arrhythmias are life-threatening medical emergencies that can result in cardiac arrest and sudden death.