Cannon A waves

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 contract simultaneously, the blood will be pushed against the AV valve, and a very large pressure wave runs up the vein.[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.

This wave will cause pulsation in the neck and abdomen, headache, cough, and jaw pain.[2]

References


This article is issued from Wikipedia - version of the 3/7/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.