These bundles and fascicles give rise to thin filaments known as Purkinje fibers.

The ventricular conduction system comprises the bundle branches and the Purkinje networks.

Heart blocks are separated into different categories based on the location of the cellular damage.

Infra-hisian blocks limit the heart's ability to coordinate the activities of the atria and ventricles, which usually results in a decrease in its efficiency in pumping blood.

[3] These specialized muscle fibers in the heart were named after the Swiss cardiologist Wilhelm His Jr., who discovered them in 1893.