Electrical Conduction System of the Heart

The normal electrical conduction in the heart allows the impulse that is generated by the sinoatrial node(SA node), situated in the walls of right atrium of the heart to be propagated to and stimulate the muscle of the atria and ventricles(myocardium). The myocardium contracts after stimulation. It is the ordered stimulation of the myocardium that allows efficient contraction of the heart, thereby allowing blood to be pumped throughout the body.

The parts of the heart beat in an orderly sequence: Contraction of the atria(atrial Systole) is followed by contraction of ventricles(ventricular Systole), and during Diastole(relaxation) all the four chambers