APPLIED RADIOLOGICAL ANATOMY

Detailed explanation-1: -The dual AV nodal system involves two separate approaches to the compact AV node, the so-called fast and slow “pathways".

Detailed explanation-2: -The atrioventricular (AV) node is a small structure in the heart, located in the Koch triangle, [1] near the coronary sinus on the interatrial septum.

Detailed explanation-3: -As well as transmitting the impulse from the atria to the ventricles the atrioventricular node has two other important functions namely: synchronisation of atrial and ventricular contractions by a varying delay; and protection of the ventricles from rapid atrial arrhythmias.