Question

multiple choice question
what is the correct order of impulse conduction through the conduction system in the heart?
o av node, purkinje fibers, av node, bundle branches
o sa node, bundle branches, av node, purkinje fibers
o av node, sa node, purkinje fibers, bundle branches
o sa node, av node, bundle branches, purkinje fibers

Explanation:

The normal impulse - conduction pathway in the heart starts at the sino - atrial (SA) node, which is the natural pacemaker. The impulse then travels to the atrioventricular (AV) node. From the AV node, the impulse proceeds through the bundle branches (right and left bundle branches) and finally reaches the Purkinje fibers, which rapidly conduct the impulse throughout the ventricles, causing them to contract.

Answer:

SA node, AV node, bundle branches, Purkinje fibers