Supraventricular tachycardia electrocardiogram

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Supraventricular tachycardia Microchapters


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Differentiating Among the Different Types of Supraventricular Tachycardia

Differentiating Supraventricular Tachycardia from Ventricular Tachycardia

Epidemiology and Demographics

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Natural History, Complications and Prognosis


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2015 ACC/AHA Guideline Recommendations

Acute Treatment of SVT of Unknown Mechanism
Ongoing Management of SVT of Unknown Mechanism
Ongoing Management of IST
Acute Treatment of Suspected Focal Atrial Tachycardia
Acute Treatment of Multifocal Atria Tachycardia
Ongoing Management of Multifocal Atrial Tachycardia
Acute Treatment of AVNRT
Ongoing Management of AVNRT
Acute Treatment of Orthodromic AVRT
Ongoing Management of Orthodromic AVRT
Asymptomatic Patients With Pre-Excitation
Management of Symptomatic Patients With Manifest Accessory Pathways
Acute Treatment of Atrial Flutter
Ongoing Management of Atrial Flutter
Acute Treatment of Junctional Tachycardia
Ongoing Management of Junctional Tachycardia
Acute Treatment of SVT in ACHD Patients
Ongoing Management of SVT in ACHD Patients
Acute Treatment of SVT in Pregnant Patients
Acute Treatment and Ongoing Management of SVT in Older Population


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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]


The best method to diagnose supraventricular tachycardia is through electrocardiography. Presentation on EKG will vary depending on the subtype. In general, QRS complexes tend to be tall and narrow, P waves are absent, and rate is greater than 100 beats per minute. Asystole may occur due to tachycardia-mediated suppression of the sinus node when the rhythm is in AVNRT.


Shown below is an EKG example of supraventricular tachycardia. The heart rate is around 185 bpm. It is somewhat unusual presentation for someone with angina. The arrhythmia terminated with adenosine which has a powerful cholinergic effect that blocks conduction through the AV node.


Copyleft image obtained courtesy of ECGpedia,

Shown below is an EKG depicting a tachycardia at a rate of 190/min with narrow QRS complexes indicating supraventricular tachycardia.


Copyleft image obtained courtesy of ECGpedia,

Shown below is an EKG recording of a patient who goes from sinus rhythm to a wide complex tachycardia at about 130/min. The wide QRS though disappears after nine complexes and is replaced by narrow complexes at a slightly slower rate. No P wave activity is seen. This is a supraventricular tachycardia with a form of aberrancy. In this case we are probably seeing a rate dependent left bundle branch block or the effect of a left bundle branch block which persists for the nine complexes because of continued block in the left bundle from the depolarizations from the intact right bundle.

Supraventricular tachycardia.jpg

Copyleft image obtained courtesy of ECGpedia,

Shown below is an example of a EKG demonstrating a rapid heart rate at the rate of nearly 300 beats per minute indicating a paroxysmal supraventricular tachycardia.

Paroxysmal supraventricular tachycardia.jpg

Copyleft image obtained courtesy of ECGpedia,

For more EKG examples of supraventricular tachycardia, click here


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