Which structure follows the His bundle in the normal conduction sequence?

Which structure follows the His bundle in the normal conduction sequence?

• A. Bundle branches
• B. AVN
• C. Purkinje fibers
• D. SAN

Answer: (A)

The main idea is the sequence of the heart’s electrical conduction as the impulse moves from the AV node toward the ventricles. After the impulse leaves the His bundle, it travels into the right and left bundle branches that run down the interventricular septum. These bundle branches then give the impulse to the Purkinje fibers, which spread the excitation to the ventricular myocardium. So, the structure that follows the His bundle in normal conduction is the bundle branches. Purkinje fibers come after the bundle branches, distributing the impulse to the ventricles, while the sinoatrial and AV nodes are earlier parts of the pathway.

The main idea is the sequence of the heart’s electrical conduction as the impulse moves from the AV node toward the ventricles. After the impulse leaves the His bundle, it travels into the right and left bundle branches that run down the interventricular septum. These bundle branches then give the impulse to the Purkinje fibers, which spread the excitation to the ventricular myocardium. So, the structure that follows the His bundle in normal conduction is the bundle branches. Purkinje fibers come after the bundle branches, distributing the impulse to the ventricles, while the sinoatrial and AV nodes are earlier parts of the pathway.