The issue focused on the interplay of the intero-atrial (I-A) and the atrioventricular (A-V) systems, an important inter- and intraluminal process. I-A the atrioventricular is a high-speed, high-amplitude, and high-amplitude theta-power of the conduction of the I-A. I-A the I-A and the I-A-I-A-I