Cannon a waves: Difference between revisions
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{{SK}} Cannon A waves; Cannon atrial waves; Canon a waves | |||
==Overview== | ==Overview== | ||
Canon a waves are waves seen occasionally in the [[jugular vein]] of humans with certain [[cardiac arrhythmias]]. When the [[Atrium (heart)|atria]] and [[Ventricle (heart)|ventricles]] [[contract]] simultaneously, the [[blood]] will be pushed against the [[AV valve]], and a very large [[pressure]] wave runs up the [[jugular vein]]<ref name="urlcannon A waves - definition of cannon A waves in the Medical dictionary - by the Free Online Medical Dictionary, Thesaurus and Encyclopedia.">{{cite web |url=http://medical-dictionary.thefreedictionary.com/cannon+A+waves |title=cannon A waves - definition of cannon A waves in the Medical dictionary - by the Free Online Medical Dictionary, Thesaurus and Encyclopedia. |work= |accessdate=}}</ref><ref name="urlPacemaker Syndrome: Overview - eMedicine Cardiology">{{cite web |url=http://emedicine.medscape.com/article/159706-overview |title=Pacemaker Syndrome: Overview - eMedicine Cardiology |work= |accessdate=}}</ref>. | |||
==Diagnosis== | ==Diagnosis== | ||
Revision as of 02:30, 4 September 2012
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Synonyms and keywords: Cannon A waves; Cannon atrial waves; Canon a waves
Overview
Canon a waves are waves seen occasionally in the jugular vein of humans with certain cardiac arrhythmias. When the atria and ventricles contract simultaneously, the blood will be pushed against the AV valve, and a very large pressure wave runs up the jugular vein[1][2].
Diagnosis
Symptoms
The following may be present:
Physical Examination
Neck
This wave will cause pulsation in the neck and abdomen.
Causes
Canon a waves may be present if there is delayed atrial contraction against a closed tricuspid valve:
References
- ↑ "cannon A waves - definition of cannon A waves in the Medical dictionary - by the Free Online Medical Dictionary, Thesaurus and Encyclopedia".
- ↑ "Pacemaker Syndrome: Overview - eMedicine Cardiology".
- ↑ Sam, Amir H. (2010). Rapid Medicine. Wiley-Blackwell. ISBN 1-4051-8323-3. Unknown parameter
|coauthors=ignored (help) - ↑ Sam, Amir H. (2010). Rapid Medicine. Wiley-Blackwell. ISBN 1-4051-8323-3. Unknown parameter
|coauthors=ignored (help)