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==Risk Factors==
==Risk Factors==
Wide complex tachycardia will be due to [[VT]] in 80% of cases if there is a history of [[myocardial infarction]] ([[MI]]). Only 7% of patients with [[SVT]] with aberrancy will have had a prior [[myocardial infarction]] ([[MI]]).  Wide complex tachycardia will be due to [[VT]] in 98% of cases if there's a history of [[structural heart disease]].
Wide complex tachycardia will be due to [[VT]] in 80% of cases if there is a history of [[myocardial infarction]] ([[MI]]). Only 7% of patients with [[SVT]] with aberrancy will have had a prior [[myocardial infarction]] ([[MI]]).  Wide complex tachycardia will be due to [[VT]] in 98% of cases if there's a history of [[structural heart disease]].


==References==
==References==

Revision as of 18:53, 3 August 2013

Wide complex tachycardia Microchapters

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Overview

Causes

Differentiating VT from SVT with aberrant conduction

Epidemiology and Demographics

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

Overview

Wide complex tachycardia is defined as a cardiac rhythm of more than 100 beats per minute with a QRS duration of 120 milliseconds or more. It is critical to differentiate whether the wide complex tachycardia is of ventricular origin and is ventricular tachycardia (VT), or if it is of supraventricular origin with aberrant conduction (SVT with aberrancy). Differentiating between these two causes of wide complex tachycardia is absolutely critical because the treatment options are quite different for VT versus SVT with aberrancy.

Causes

A wide complex tachycardia is either of ventricular origin (ventricular tachycardia or VT), or is of supraventricular origin with aberrant conduction (SVT with aberrancy).

Differential Diagnosis of Wide Complex Tachycardia: Distinguishing VT from SVT

Differentiating between VT and SVT as the cause of wide complex tachycardia is absolutely critical because the treatment options are quite different for VT versus SVT with aberrancy.

The diagnosis of VT is more likely if:

For more detailed information regarding how to differentiate VT from SVT please view the differential diagnosis page or click here.

Epidemiology and Demographics

The underlying cause of wide complex tachycardia tends to be ventricular tachycardia (VT) in older patients and supraventricular tachycardia (SVT) with abberancy in younger patients.

Risk Factors

Wide complex tachycardia will be due to VT in 80% of cases if there is a history of myocardial infarction (MI). Only 7% of patients with SVT with aberrancy will have had a prior myocardial infarction (MI). Wide complex tachycardia will be due to VT in 98% of cases if there's a history of structural heart disease.

References

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