| 词条 | Junctional tachycardia |
| 释义 |
| name = Junctional tachycardia | synonyms = | image = Junctional Tachycardia.jpg | alt = | caption = ECG showing junctional tachycardia. Narrow complex QRS. No P waves. Heart rate fast. | pronounce = | field = | symptoms = | complications = | onset = | duration = | types = | causes = | risks = | diagnosis = | differential = | prevention = | treatment = Amioderone to control the heart rate, cardio-version is not used. | medication = | prognosis = | frequency = | deaths = }} 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 an Accelerated Junctional rhythm is from 60-100bpm and then becomes junctional tachycardia at a rate of >100 bpm. CauseIt 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] DiagnosisOn an EKG, junctional tachycardia exhibits the following classic criteria:[2]
It can coexist with other superventricular tachycardias due to the disassociation between the SA node and the AV node. Junctional tachycardia can appear similar to atrioventricular nodal reentrant tachycardia.[5] One form is junctional ectopic tachycardia. TreatmentAmioderone is used to control the rhythm. Cardio-version is not used. See also
References1. ^{{DorlandsDict|nine/000957463|junctional tachycardia}} 2. ^1 {{Cite journal| last = ROSEN| first = KENNETH| year = 1973| title = Junctional Tachycardia: Mechanisms, Diagnosis, Differential Diagnosis, and Management| url = http://circ.ahajournals.org/content/47/3/654.full.pdf| journal = Circulation| pages = 654–664| doi = 10.1161/01.CIR.47.3.654| pmid = | access-date = March 1, 2015}} 3. ^{{cite web |url=http://emedicine.medscape.com/article/155146-overview |title=Junctional Rhythm: Overview - eMedicine |format= |work= |accessdate=2008-12-21}} 4. ^{{cite book | last = Aehlert | first = Barbara | title = ECGs Made Easy | publisher = Elsevier | series = | volume = | edition = 5th | date = 2013 | location = | page = 160 | language = | url = | doi = | id = | isbn = 9780323170574 | mr = | zbl = | jfm = }} 5. ^{{cite journal |vauthors=Srivathsan K, Gami AS, Barrett R, Monahan K, Packer DL, Asirvatham SJ |title=Differentiating atrioventricular nodal reentrant tachycardia from junctional tachycardia: novel application of the delta H-A interval |journal=J. Cardiovasc. Electrophysiol. |volume=19 |issue=1 |pages=1–6 |date=January 2008 |pmid=17916156 |doi=10.1111/j.1540-8167.2007.00961.x |url=http://www3.interscience.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=1045-3873&date=2008&volume=19&issue=1&spage=1|archive-url=https://archive.today/20130105061843/http://www3.interscience.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=1045-3873&date=2008&volume=19&issue=1&spage=1|dead-url=yes|archive-date=2013-01-05}} External links{{Medical resources| DiseasesDB = | ICD10 = {{ICD10|I47.1}} | ICD9 = {{ICD9|xxx}} | ICDO = | OMIM = | MedlinePlus = | MeSH = | GeneReviewsNBK = | GeneReviewsName = }}{{Heart diseases}}{{circulatory-disease-stub}} 1 : Cardiac arrhythmia |
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