Jam with Confidence: Rock Your Certified Rhythm Analysis Technician Exam 2026!

The Bundle branches are responsible for conducting electrical impulses down both sides of the interventricular septum. This system is an integral part of the heart's conduction network.

When electrical impulses are generated by the sinoatrial (SA) node, they travel to the atrioventricular (AV) node, and then onwards to the Bundle of His. From there, the impulses are divided into two pathways known as the left and right bundle branches, which extend along the interventricular septum. This division allows for the coordinated contraction of the ventricles, ensuring efficient pumping of blood to the lungs and the rest of the body.

Purkinje fibers are the terminal structures that distribute impulses within the ventricles, facilitating muscle contraction once the impulse has traveled down the bundle branches. The Bundle of His itself serves as the transitional pathways from the AV node to the bundle branches, rather than conducting impulses to the interventricular septum specifically. The AV node primarily functions to delay the conduction of impulses from the atria to the ventricles, ensuring they contract in a coordinated manner.

Therefore, the correct answer accurately identifies the specific part of the conduction system that effectively conducts impulses down both sides of the interventricular septum.