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# The Cardiac Conduction System ## Bundle branches The bundle branches are where the Bundle of His splits into two branches. The split happens at roughly the same level where the top and bottom chambers of the heart are divided. The branches carry the electrical cascade to the outer areas of the...

# The Cardiac Conduction System ## Bundle branches The bundle branches are where the Bundle of His splits into two branches. The split happens at roughly the same level where the top and bottom chambers of the heart are divided. The branches carry the electrical cascade to the outer areas of the heart, especially the ventricles. ## Purkinje fibers As the bundle branches fan out, they become a web-like network of conducting segments called the Purkinje fibers. The Bundle of His, bundle branches and Purkinje fibers are often described as the His-Purkinje system, which has a shape like an upside-down umbrella. The Bundle of His is the handle, the bundle branches are the stem and the Purkinje fibers are the umbrella's canopy. * located in the inner ventricular walls of the heart, just beneath the endocardium. * consist of specialized cardiomyocytes that are able to conduct cardiac action. * allow the heart's conduction system to create synchronized contractions of its ventricles, and are essential for maintaining a consistent heart rhythm.