Cannon a waves: Difference between revisions
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{{SK}} Cannon A waves; Cannon atrial waves; Canon a waves | {{SK}} Cannon A waves; Cannon A wave; Cannon a waves; Cannon a wave; Cannon atrial waves; Canon a waves | ||
==Overview== | ==Overview== | ||
Cannon 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, or when the [[right atrium]] contracts against a closed [[tricuspid valve]], the [[blood]] will be pushed against the [[AV valve]], and a very large retrograde [[pressure]] wave travels 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== | ||
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====Neck==== | ====Neck==== | ||
This wave will cause [[pulse|pulsation]] in the neck and abdomen. | This wave will cause [[pulse|pulsation]] in the neck and abdomen. | ||
{{#ev:youtube|gMBZMQwoi_I}} | |||
==Causes== | ==Causes== | ||
*[[Complete heart block]]<ref>{{cite book |last= Sam |first= Amir H. |coauthors= James T.H. Teo |title= [[Rapid Medicine]] |publisher= [[Wiley-Blackwell]] |year= 2010 |isbn= 1-4051-8323-3}}</ref> | *[[Complete heart block]]<ref>{{cite book |last= Sam |first= Amir H. |coauthors= James T.H. Teo |title= [[Rapid Medicine]] |publisher= [[Wiley-Blackwell]] |year= 2010 |isbn= 1-4051-8323-3}}</ref> | ||
*[[Junctional rhythms]] | *[[Junctional rhythms]] | ||
*[[Pacemaker syndrome]] | *[[Pacemaker syndrome]] | ||
*[[Pulmonary hypertension]]<ref>{{cite book |last= Sam |first= Amir H. |coauthors= James T.H. Teo |title= [[Rapid Medicine]] |publisher= [[Wiley-Blackwell]] |year= 2010 |isbn= 1-4051-8323-3}}</ref> | *[[Pulmonary hypertension]]<ref>{{cite book |last= Sam |first= Amir H. |coauthors= James T.H. Teo |title= [[Rapid Medicine]] |publisher= [[Wiley-Blackwell]] |year= 2010 |isbn= 1-4051-8323-3}}</ref> | ||
*[[Ventricular tachycardia]] | |||
==References== | ==References== | ||
{{reflist|2}} | {{reflist|2}} | ||
{{DEFAULTSORT:Cannon A Waves}} | {{DEFAULTSORT:Cannon A Waves}} | ||
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==References== | ==References== | ||
{{Reflist|2}} | {{Reflist|2}} | ||
[[CME Category::Cardiology]] | |||
[[Category:Cardiology]] | |||
[[Category:Physical examination]] | |||
[[Category:Physical examination]] | [[Category:Physical examination]] | ||
[[Category:Cardiology]] | [[Category:Cardiology]] | ||
Latest revision as of 06:15, 15 March 2016
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Synonyms and keywords: Cannon A waves; Cannon A wave; Cannon a waves; Cannon a wave; Cannon atrial waves; Canon a waves
Overview
Cannon a waves are waves seen occasionally in the jugular vein of humans with certain cardiac arrhythmias. When the atria and ventricles contract simultaneously, or when the right atrium contracts against a closed tricuspid valve, the blood will be pushed against the AV valve, and a very large retrograde pressure wave travels 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.
{{#ev:youtube|gMBZMQwoi_I}}
Causes
- Complete heart block[3]
- Junctional rhythms
- Pacemaker syndrome
- Pulmonary hypertension[4]
- Ventricular tachycardia
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)