A report on Atrioventricular node and Atrioventricular block

Image showing the conduction system of the heart. The AV node is labelled 2.
Representative electrocardiogram recordings of the different degrees of heart block
Isolated heart conduction system showing atrioventricular node
Electrical conduction pathway of the heart.
Normal ECG tracing for a single contraction of the heart.
ECG tracing in relation to normal depolarization and contraction of the heart. Red tracing indicates pathway of electrical depolarization. Blue tracing indicates resulting ECG tracing.

The signal travels from the SA node to the ventricles through the atrioventricular node (AV node).

- Atrioventricular block

Atrioventricular conduction disease (AV block) describes impairment of the electrical continuity between the atria and ventricles. It occurs when the atrial depolarization fail to reach the ventricles or is conducted with an abnormally long delay. It can result from an injury or be a genetically inherited disorder.

- Atrioventricular node
Image showing the conduction system of the heart. The AV node is labelled 2.

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