Atrioventricular block Atrioventricular block, also called AV block, is a medical term used for a disorder of electrical conduction between the atria and cardiac ventricles . It is usually associated with the atrioventricular node , although it can be caused by failures in other cardiac conduction structures. These locks can be temporary, intermittent, or permanent. Likewise, they are classified according to their severity.
Summary
[ hide ]
- 1 Classification
- 2 Diagnosis
- 3 References
- 4 See also
- 5 Sources
Classification
There are three types of AV blocks:
- First degree AV block, when impulses from the atria to the ventricles slow down.
- Second degree AV block, when part of the impulses that are transmitted from the atria to the ventricles are blocked, that is, they are not transmitted. It is expressed with a numerical relationship; for example, 3: 2 means that of three impulses only two reach the ventricles.
- Third-degree or complete AV block, when all impulses from the atria are interrupted and, therefore, none is conducted to the ventricles .
Diagnosis
Atrioventricular blocks are seen on an electrocardiogram where heart rhythm disorders are seen. Specifically, P waves usually appear that are not followed by a QRS complex, as is customary to see on the electrocardiogram, so there is no contraction of the ventricles. In these patients a slow pulse called bradyphigmia is usually perceived
