Cannon
Cannon (medicine)
Cannon (pronounced: /ˈkanən/) is a term used in medicine to describe a phenomenon where the atria and ventricles of the heart beat independently of each other. This is often seen in third-degree atrioventricular block (AV block), a condition where the signal from the atria to the ventricles is completely blocked.
Etymology
The term "Cannon" in this context is named after the American physiologist Walter Bradford Cannon, who first described this phenomenon. Cannon is also known for his work on the "fight or flight" response and the concept of homeostasis.
Related Terms
- Atria: The two upper chambers of the heart, which receive blood from the veins and then pump it to the ventricles.
- Ventricles: The two lower chambers of the heart, which receive blood from the atria and then pump it to the body.
- Atrioventricular block (AV block): A type of heart block in which the signal from the atria to the ventricles is impaired or completely blocked.
- Walter Bradford Cannon: An American physiologist who made significant contributions to the understanding of the autonomic nervous system and the physiology of emotion.
External links
- Medical encyclopedia article on Cannon
- Wikipedia's article - Cannon
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