Right ventricular outflow tract tachycardia: Difference between revisions
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{{CMG}} | {{CMG}} | ||
{{SK}} RVOT tachycardia | {{SK}} RVOT tachycardia; right ventricular outflow tract VT; right ventricular outflow tract ventricular tachycardia; right ventricular outflow tract (RVOT) tachycardia | ||
==Overview== | ==Overview== | ||
RVOT tachycardia is a type of monomorphic [[ventricular tachycardia]] originating in the [[right ventricular outflow tract]]. RVOT morphology refers to the characteristic pattern of this type of tachycardia on an ECG. | RVOT tachycardia is a type of monomorphic [[ventricular tachycardia]] originating in the [[right ventricular outflow tract]]. RVOT morphology refers to the characteristic pattern of this type of tachycardia on an ECG. | ||
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RVOT tachycardia is a type of monomorphic [[VT]] that originates from either the outflow tract of the [[right ventricle]] (the [[right ventricular outflow tract]]) or in some cases from the [[tricuspid valve]] annulus. | RVOT tachycardia is a type of monomorphic [[VT]] that originates from either the outflow tract of the [[right ventricle]] (the [[right ventricular outflow tract]]) or in some cases from the [[tricuspid valve]] annulus. | ||
===Associated Conditions=== | ===Associated Conditions=== | ||
Uusally structural heart disease is absent, but RVOT tachycardia can occur in the context of [[arrhythmogenic right ventricular dysplasia]] ([[ARVD]]). | Uusally structural heart disease is absent, but RVOT tachycardia can occur in the context of [[arrhythmogenic right ventricular dysplasia]] ([[ARVD]]). Left to right shunts can be associated with RVOT tachycardia as can right sided valvular lesions. | ||
==Natural History, Complications, Prognosis== | ==Natural History, Complications, Prognosis== | ||
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In so far as structural heart disease is absent, there are no physical examination findings. | In so far as structural heart disease is absent, there are no physical examination findings. | ||
===Electrocardiogram=== | |||
Electrocardiographic characteristics include the following: | Electrocardiographic characteristics include the following: | ||
* [[Atrioventricular dissociation]] similar to all patients with VT | * [[Atrioventricular dissociation]] similar to all patients with [[VT]] | ||
* [[Heart rate]] > 100 beats per minute | * [[Heart rate]] > 100 beats per minute | ||
* [[QRS]] duration > 120 milliseconds | * [[QRS]] duration > 120 milliseconds | ||
* [[Left bundle branch block]] pattern or morphology | * [[Left bundle branch block]] pattern or morphology with negative deflection in V1 and V2 | ||
* A rightward and inferior axis deviation (approximately +90 degrees) | * A rightward and inferior axis deviation (approximately +90 degrees) | ||
[[File:Right ventricular outflow tract ventricular tachycardia.JPG|Frame|Right ventricular outflow tract ventricular tachycardia. Note the negative deflection in V1 and V2 and left bundle branch block pattern to the tachycardia|500 px]] | |||
==Lecture== | |||
{{#ev:youtube|S0iyDcuGtuU&feature=BFa&list=ULV9Qao-ZPOJs&lf=mfu_in_order}} | |||
==References== | ==References== | ||
Latest revision as of 01:53, 23 September 2012
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Ventricular tachycardia Microchapters |
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Differentiating Ventricular Tachycardia from other Disorders |
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Diagnosis |
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Treatment |
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Case Studies |
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Right ventricular outflow tract tachycardia On the Web |
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to Hospitals Treating Right ventricular outflow tract tachycardia |
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Risk calculators and risk factors for Right ventricular outflow tract tachycardia |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Synonyms and keywords: RVOT tachycardia; right ventricular outflow tract VT; right ventricular outflow tract ventricular tachycardia; right ventricular outflow tract (RVOT) tachycardia
Overview
RVOT tachycardia is a type of monomorphic ventricular tachycardia originating in the right ventricular outflow tract. RVOT morphology refers to the characteristic pattern of this type of tachycardia on an ECG.
Pathophysiology
RVOT tachycardia is a type of monomorphic VT that originates from either the outflow tract of the right ventricle (the right ventricular outflow tract) or in some cases from the tricuspid valve annulus.
Associated Conditions
Uusally structural heart disease is absent, but RVOT tachycardia can occur in the context of arrhythmogenic right ventricular dysplasia (ARVD). Left to right shunts can be associated with RVOT tachycardia as can right sided valvular lesions.
Natural History, Complications, Prognosis
RVOT tachycardia is generally not associated with sudden cardiac death.
Diagnosis
Physical Examination
In so far as structural heart disease is absent, there are no physical examination findings.
Electrocardiogram
Electrocardiographic characteristics include the following:
- Atrioventricular dissociation similar to all patients with VT
- Heart rate > 100 beats per minute
- QRS duration > 120 milliseconds
- Left bundle branch block pattern or morphology with negative deflection in V1 and V2
- A rightward and inferior axis deviation (approximately +90 degrees)
Lecture
{{#ev:youtube|S0iyDcuGtuU&feature=BFa&list=ULV9Qao-ZPOJs&lf=mfu_in_order}}