Dysrhythmia redirects here. For the American band, see dysrhythmia . - | ICD9 = | ICDO = | OMIM = | MedlinePlus = 001101 | eMedicineSubj = | eMedicineTopic = | MeshID = D001145 | }}Cardiac arrhythmia is any of a group of conditions in which the electrical activity of the heart is irregular or is faster or slower than normal. Some arrhythmias are life-threatening medical emergencies that can cause cardiac arrest and sudden death. Others cause aggravating symptoms, such as an awareness of a different heart beat, or palpitation, which can be annoying. Some are quite minor and can be regarded as normal. In fact, most people have felt a skip of a beat or a sudden tachycardia, which are usually not a cause for alarm[LINK: http://familydoctor.org/online/famdocen/home/articles/286.html] familydoctor.org. Sinus arrhythmia is the mild acceleration followed

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