THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -The atrioventricular (AV) node is the “gatekeeper” between the atria and the ventricles and is located at the AV junction on the right side of the heart (Figure 1A). The primary role of the node is to conduct the action potential from the atria to the ventricles.

Detailed explanation-2: -The delaying an electric impulse through the atrioventricular node (AV node) allows atria to completely empty themselves into the ventricle for contraction before the blood pumps out through ventricles.

Detailed explanation-3: -An electrical stimulus is generated in a special part of the heart muscle called the sinus node. It’s also called the sinoatrial node (SA node).

Detailed explanation-4: -Disease of the AV node can cause either a delay or a partial or complete block in the transmission of electrical impulses from the atria to the ventricles, a condition known as heart block. A delay in conduction through the AV node is seen on the ECG as an increased PR interval.