Source:http://linkedlifedata.com/resource/umls/id/C0003811
CSP: any variation from the normal rhythm or rate of the heart beat.,MSH: Any disturbances of the normal rhythmic beating of the heart or MYOCARDIAL CONTRACTION. Cardiac arrhythmias can be classified by the abnormalities in HEART RATE, disorders of electrical impulse generation, or impulse conduction.,MEDLINEPLUS: <p>Has your heart ever skipped a beat? Sometimes it really does if you have an arrhythmia. An arrhythmia is any disorder of your heart rate or rhythm. It means that your heart beats too quickly, too slowly or with an irregular pattern. When the heart beats faster than normal, it is called tachycardia. When the heart beats too slowly, it is called bradycardia.</p><p>Many factors can affect your heart's rhythm, such as having had a <a href='http://www.nlm.nih.gov/medlineplus/heartattack.html'>heart attack</a>, blood chemistry imbalances or abnormal hormone levels. Some substances or medicines may also cause arrhythmias. </p><p>Symptoms of arrhythmias include</p><ul> <li>Fast or slow heart beat</li> <l