Define arrhythmia and discuss different categories of arrhythmias
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The term arrhythmia or dysrhythmia refers to an abnormal rhythm as a result of a defect in the conduction system of the heart. Arrhythmias are categorized by their speed, rhythm, and origination of the problem. Bradycardia refers to a slow heart rate (blow 50 bpm); tachycardia refers to a rapid heart rate (over 100 bpm); and fibrillation refers to rapid, uncoordinated heartbeats. Arrhythmias that originate in the atria are called supraventricular or atrial arrhythmias; those that originate in the ventricles are called ventricular arrhythmias.
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