Cannon a waves: Difference between revisions

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VisualWikitext

Latest revision as of 06:15, 15 March 2016

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.

Causes

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)

References

CME Category::Cardiology

[urlcannon_A_waves_-_definition_of_cannon_A_waves_in_the_Medical_dictionary_-_by_the_Free_Online_Medical_Dictionary,_Thesaurus_and_Encyclopedia.-1] "cannon A waves - definition of cannon A waves in the Medical dictionary - by the Free Online Medical Dictionary, Thesaurus and Encyclopedia".

[urlPacemaker_Syndrome:_Overview_-_eMedicine_Cardiology-2] "Pacemaker Syndrome: Overview - eMedicine Cardiology".

[3] Sam, Amir H. (2010). Rapid Medicine. Wiley-Blackwell. ISBN 1-4051-8323-3. Unknown parameter |coauthors= ignored (help)

[4] Sam, Amir H. (2010). Rapid Medicine. Wiley-Blackwell. ISBN 1-4051-8323-3. Unknown parameter |coauthors= ignored (help)

[1]

[2]

[3]

[4]

@@ Line 3: / Line 3: @@
 {{CMG}}
+{{SK}} Cannon A waves; Cannon A wave; Cannon a waves; Cannon a wave; Cannon atrial waves; Canon a waves
 ==Overview==
-'''Cannon A waves''', or cannon [[atrial]] [[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 [[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>. It is associated with heart block, in particular third-degree (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> It is also seen in 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>
+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>.
-This wave will cause [[pulse|pulsation]] in the neck and abdomen, [[headache]], [[cough]], and [[jaw]] pain<ref name="urlPacemaker Syndrome: Overview - eMedicine Cardiology"/>.
+==Diagnosis==
+===Symptoms===
+The following may be present:
+*[[Cough]]
+*[[Headache]]
+*[[Jaw pain]]
-==Cuases==
+===Physical Examination===
-[[Canon a waves]] may be present if there is delayed atrial contraction against a closed [[tricuspid valve]]:
+====Neck====
+This wave will cause [[pulse|pulsation]] in the neck and abdomen.
+{{#ev:youtube|gMBZMQwoi_I}}
+==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>
 *[[Junctional rhythms]]
+*[[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>
+*[[Ventricular tachycardia]]
 ==References==
-{{reflist}}
+{{reflist|2}}
-{{Cardiovascular system symptoms and signs}}
 {{DEFAULTSORT:Cannon A Waves}}
-[[Category:Medical signs]]
 ==References==
 {{Reflist|2}}
+[[CME Category::Cardiology]]
+[[Category:Cardiology]]
+[[Category:Physical examination]]
 [[Category:Physical examination]]
-[[Category:Signs and symptoms]]
 [[Category:Cardiology]]

Cannon a waves: Difference between revisions

Latest revision as of 06:15, 15 March 2016

Overview

Diagnosis

Symptoms

Physical Examination

Neck

Causes

References

References

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