Can someone please explain AV bundle to me (aka bundle of His) please..
I am not understanding this whole thing including the Purkinje Fiber!
Thanks
The electrical conduction system is set up so that the heart can contract in a sequential regulated function. The SA node depolarizes, setting off a wave of contractions through the atrial tissues. Eventually the wave of depolarization reaches the AV node, which ******s conduction for a fraction of a second. This is enough time to let the atria properly contract and expel blood into the ventricles. After the depolarizing current passes through the AV node, it is rapidly conducted through the bundle of His system, then through to the purkinje fibers.
The bundle of his and purkinje fibers conduct current more rapidly than the surrounding ventricular myocardia. The fibers rapidly conduct current through the interventricular septum to the distal regions of the heart, allowing for a fast, concerted contractile response