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The term “arrhythmia” comes from the ancient Greek a-rhuthmos) and identifies a loss of normal heart activity. Cardiac arrhythmias can be classified into bradyarrhythmias (when heart rate is < than 60 beats for minute) or Tachyarrhythmias (when heart rate is > than 100 beat for minute), that may arise from supraventricular regions or ventricles. Bradyarrhythmias include sinus bradycardia, wandering pacemaker, sinus pause, and atrioventricular blocks. Supraventricular tachyarrhythmias include premature ectopic beats, AV nodal reentrant tachycardia (AVNRT), orthodromic AV reentrant tachycardia (AVRT) due to an Accessory Pathway, ectopic atrial tachycardia, atrial fibrillation (AF), and atrial flutter (AF1). Ventricular tachyarrhythmias include premature ectopic beats, non-sustained ventricular tachycardia, idio-ventricular accelerated rhythm, benign idiopathic ventricular tachycardia,...
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