What does the atrioventricular bundle branch into?

Anatomical Parts The bundle of His branches into the left and the right bundle branches, which run along the interventricular septum. The left bundle branch further divides into the left anterior and the left posterior fascicles. These bundles and fascicles give rise to thin filaments known as Purkinje fibers.

Where is the AV bundle and branches located?

The AV bundle arises from the compact node and penetrates the central fibrous body of the heart, branching into the right and left bundle branches. The left bundle branch has a subendocardial location over the left ventricular septal surface, and it further subdivides into anterior and posterior fascicles.

What is the role of the bundle of His bundle branches and Purkinje fibers?

The bundle of His divides into the left and right bundle branches which then become the Purkinje fibers that interweave the contractile cells of the ventricle and speed the excitation throughout the ventricles.

What supplies the atrioventricular bundle?

The atrioventricular (AV) node is a small structure in the heart, located in the Koch triangle,[1] near the coronary sinus on the interatrial septum. In a right-dominant heart, the atrioventricular node is supplied by the right coronary artery.

What is a bundle branch block?

If either the right or left bundle branch fail to conduct the impulse properly or cause a delay in the signal, it is called a “bundle branch block”. The bundle branches are a part of the electrical system of the heart.

What are the two branches of the left bundle of his?

The bundle of His branches into the left and the right bundle branches, which run along the interventricular septum. The left bundle branch further divides into the left anterior and the left posterior fascicles.

What is an AV block?

AV blocks occur due to functional or anatomical blocks in the AV system. The block may be located in the atrioventricular node, His bundle, bundle branches and/or fascicles. A wide range of conditions may cause AV blocks.

What is second-degree AV-block?

In second-degree AV block some impulses are completely blocked, which means that not all P-waves are followed by QRS complexes . Second-degree AV-block occurs in the following two variants: