Atrial Tachycardia

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Atrial Tachycardia
Atrial Tachycardia

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Atrial Tachycardia

Atrial tachycardia (AT) is an important entity in the differential diagnosis of narrow complex tachycardia. It is defined as an arrhythmia that originates in atrial tissue that does not encompass the sinus node. Although nonsustained asymptomatic episodes are frequently seen in routine Holter recordings, the prevalence of this arrhythmia is approximately 5% to 15% in patients referred for routine invasive electrophysiologic evaluation. ATs are regular atrial rhythms at a constant rate of 100 beats/min or greater that originate in the atrium and do not require participation of the atrioventricular node (AVN) for maintenance. ATs constitute an important cause of supraventricular tachycardia.…

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 Atrial Tachycardia

Atrial arrhythmias frequently complicate heart failure and atrial enlargement. The autonomic nervous system likely plays a critical role in initiating or triggering some ATs. ,

Cardiology Advisor

Of all PSVTs, atrial tachycardia is the least common, accounting for approximately 1 in 10 cases. Among patients referred for supraventricular tachycardia (SVT) ablation, focal atrial tachycardia (FAT) is present in 3% to 17%.


Atrial tachycardia tends to occur in individuals with structural heart disease, with or without heart failure, and ischemic coronary artery disease. However, focal atrial tachycardia often occurs in healthy individuals without structural heart disease.

Washington Heart Rhythm Associates

Atrial tachycardia, as an isolated rhythm disturbance, is not considered a life-threatening condition. Some patients are able to control their episodes with life-style modification. This includes avoidance of caffeinated beverages, alcohol, sleep-deprivation, stressful situations, and anxiety. Spontaneous resolution of symptomatic episodes is uncommon. Prolonged episodes (typically man months or years) of continuous atrial tachycardia can be problematic. Atrial tachycardia can cause irreversible changes to the atria, including negative remodeling with atrial enlargement and weakness (myopathy).

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