Autrioventricular block

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.


[ hide ]

  • 1 Classification
  • 2 Diagnosis
  • 3 References
  • 4 See also
  • 5 Sources


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 .


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


by Abdullah Sam
I’m a teacher, researcher and writer. I write about study subjects to improve the learning of college and university students. I write top Quality study notes Mostly, Tech, Games, Education, And Solutions/Tips and Tricks. I am a person who helps students to acquire knowledge, competence or virtue.

Leave a Comment