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 is any irregularity in the heart's rhythm. If the heart beats more rapidly than normal, this arrhythmia is called tachycardia. An unpleasant sensation in the heart, whether rapid or slow, regular or irregular, and of which one is consciously aware, is called a palpitation.