Cannon A waves, or cannon atrial waves, are waves seen occasionally in the jugular vein of humans with certain cardiac arrhythmias. When the atria and ventricles happen to contract simultaneously, the right atrium contracts against a closed tricuspid valve, resulting in back pressure into the venous system that can be seen in the jugular venous pulse as a high-amplitude "cannon wave".[1][2] It is associated with heart block, in particular third-degree (complete) heart block.[3] It is also seen in pulmonary hypertension.[3] Cannon A waves may also be seen in ventricular tachycardia due to the inherent AV dissociation of the arrhythmia.[citation needed]
This wave will cause pulsation in the neck and abdomen, headache, cough, and jaw pain.[2]
^"cannon A waves - definition of cannon A waves in the Medical dictionary - by the Free Online Medical Dictionary, Thesaurus and Encyclopedia".
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pulsations, often due to cannonAwaves in the jugular venous, pulsations that occur when the right atrium contracts against a closed tricuspid valve....
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Brands 2015, p. 150. Cannon 2003, p. 147. Putnam 2006, p. 27. Cannon 2003, pp. 147–148. Cannon 2003, p. 135. Pemberton 1998, p. 69. Cannon 2003, p. 149. Woodard...
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