AnatomyBundleHis

: Bundle of His; The bundle of His is located in the proximal intraventicular septum. It emerges from the AV node to begin the conduction of the impulse from the AV node to the ventricles. The Bundle of His branches into the right, left anteriosuperior and left posterioinferior bundle branches.; The AV node together with the bundle of His make up the AV junctional tissue. The AV junctional tissue is considered supraventicular (above the ventricles). The AV junctional tissue has an intrinsic rate of 40-60 beast per minute. If the SA nodes are injured AV junctional tissue can take over control of heart rate and rhythm.

Bundle Branches & Purkinje Fibers; The bundle of His branches into the three bundle branches: the right, left anteriosuperior and left postrioinferior bundle branches that run along the interventicular septum. The three bundle branches comprise the trifascular system.; The bundles give rise to thin filaments known as Purkinje fibers. These fibers distribute; the impulse to the ventricular muscle. Collectively, the bundle branches and purkinje network comprises the ventricular conduction system. It takes about 0.03-0.04s for the impulse to travel from the bundle of His to the ventricular muscle.
: The ventricular conducting system is capable of intrinsic pacemaker activity at a rate of 30-40 impulses per minute. If the SA and AV nodes are injured the ventricular conducting system can take over control of heart rate and rhythm.

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