Junctional tachycardia
| Junctional tachycardia | |
|---|---|
| File:Junctional Tachycardia.jpg
ECG showing junctional tachycardia. Narrow complex QRS. No P waves. Heart rate fast.
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| Classification and external resources | |
| ICD-10 | Xxx.x |
| ICD-9-CM | xxx |
| Patient UK | Junctional tachycardia |
Junctional tachycardia is a form of supraventricular tachycardia characterized by involvement of the AV node.[1] It can be contrasted to atrial tachycardia. It is a tachycardia associated with the generation of impulses in a focus in the region of the atrioventricular node due to an A-V disassociation.[2] In general, the AV junction's intrinsic rate is 40-60 bpm so junctional tachycardia implies a rate >60 bpm.
Contents
Cause
It can be associated with digitalis toxicity.[3] It may be also be due to onset of acute coronary syndrome, heart failure, conduction system diseases with enhanced automaticity, or administration of theophylline.[4]
Diagnosis
Lua error in package.lua at line 80: module 'strict' not found. On an EKG, Junctional Tachycardia exhibits the following classic criteria:[2]
- P-Waves: The p-wave may be inverted in leads II, III and aVf or not visible
- Narrow QRS complexes (which is consistent with non-ventricular rhythms)
It can coexist with other superventricular tachycardias due to the disassociation between the SA node and the AV node. Junctional Tachycardia is can appear similar to atrioventricular nodal reentrant tachycardia.[5]
One form is junctional ectopic tachycardia.
See also
References
- ↑ "junctional tachycardia" at Dorland's Medical Dictionary
- ↑ 2.0 2.1 Lua error in package.lua at line 80: module 'strict' not found.
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- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
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