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Atrial tachycardia
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Atrial tachycardia

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Contributors: Ryan Hoefen MD, PhD
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Synopsis

A cardiac arrhythmia characterized by an atrial rhythm with a rate greater than 100 beats per minute. Subtypes include focal and multifocal.

Focal Atrial Tachycardia
A cardiac arrhythmia characterized by a regular rhythm greater than 100 beats per minute originating from a single site in the left or right atrium outside the sinus node due to a mechanism of enhanced automaticity or microreentry. Electrocardiographically, there is generally a single P wave morphology that is distinct from the sinus P wave. Patients generally present with palpitations or, in rare cases, syncope. Underlying causes include hypertension, cardiomyopathy, myocardial infarction, infection, hypokalemia, hypoxia, theophylline, cocaine, or other stimulants. Many cases are idiopathic.

Multifocal Atrial Tachycardia
A cardiac arrhythmia characterized by an irregular rhythm greater than 100 beats per minute originating from multiple sites in the left and right atria, resulting in at least three distinct P wave morphologies. Underlying pulmonary disease (most commonly chronic obstructive pulmonary disease) is present in the majority of cases, although decompensated heart failure is also present in many patients. The arrhythmia is often an incidental finding with symptoms of underlying pulmonary disease or congestive heart failure (ie, shortness of breath, cough, fatigue) predominating, although palpitations may be present.

Codes

ICD10CM:
I49.8 – Other specified cardiac arrhythmias

SNOMEDCT:
276796006 – Atrial tachycardia

Differential Diagnosis & Pitfalls

Best Tests

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Drug Reaction Data

Below is a list of drugs with literature evidence indicating an adverse association with this diagnosis. The list is continually updated through ongoing research and new medication approvals. Click on Citations to sort by number of citations or click on Medication to sort the medications alphabetically.

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References

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Last Updated: 01/31/2017
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Atrial tachycardia
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Atrial tachycardia : Dizziness, Fatigue, Heart palpitations, Dyspnea, Presyncope, HR increased
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