PATHOLOGY

Detailed explanation-1: -The atrioventricular node delays the SA node’s electrical signal. It delays the signal by a consistent amount of time (a fraction of a second) each time. The delay ensures that your atria are empty of blood before the contraction stops.

Detailed explanation-2: -AV Node Delay. CLASS, a SMALLER nodal cell DIAMETER leads to a slighly slower conduction of the electrical signal. How is this delay beneficial to the heart? It gives the atria just a little more time to eject as much blood as possible into the ventricles.

Detailed explanation-3: -The main parts of the system are the SA node, AV node, bundle of HIS, bundle branches, and Purkinje fibers. Let’s follow a signal through the contraction process. The SA node starts the sequence by causing the atrial muscles to contract. That’s why doctors sometimes call it the anatomical pacemaker.