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The atrioventricular (AV) node is a small structure in the heart, located in the Koch triangle, near the coronary sinus on the interatrial septum. In a right-dominant heart, the atrioventricular node is supplied by the right coronary artery. The purpose of this structure is to connect the electrical systems of the atria and the ventricles, providing electrical impedance from the atria and an intrinsic pacemaker in its absence. The intrinsic rate of the AV node is 40 to 60 beats per minute (bpm).Medical Histology is the microscopic study
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