Figure 4.

In addition to understanding the development of the conduction system per se, the construction of the fiber orientation of the contractile myocardium is relevant for electrophysiology. For example, as a result of preferential fiber orientations (Bachman bundle, peripulmonary vein, etc.), conduction occurs in a specific ordered pattern. The principal electrical conduction between the right and left atrium is Bachman's bundle, and from here relative early excitation of the periappendage region and the pericoronary sinus region occurs with the late activation in the posterior left atrium.