<P> The sinoatrial node ( SA node ) , also known as sinus node , is a group of cells located in the wall of the right atrium of the heart . These cells have the ability to spontaneously produce an electrical impulse ( action potential ; see below for more details ) , that travels through the heart via the electrical conduction system ( see figure 1 ) causing it to contract . In a healthy heart , the SA node continuously produces action potential , setting the rhythm of the heart and so is known as the heart 's natural pacemaker . The rate of action potential production ( and therefore the heart rate ) is influenced by nerves that supply it . </P>
<P> The sinoatrial node ( SA node ) , also known as sinus node , is a group of cells located in the wall of the right atrium of the heart . These cells have the ability to spontaneously produce an electrical impulse ( action potential ; see below for more details ) , that travels through the heart via the electrical conduction system ( see figure 1 ) causing it to contract . In a healthy heart , the SA node continuously produces action potential , setting the rhythm of the heart and so is known as the heart 's natural pacemaker . The rate of action potential production ( and therefore the heart rate ) is influenced by nerves that supply it . </P>
what is a role of the pacemaker or sinoatrial node ( san )
what is a role of the pacemaker or sinoatrial node ( san )
heart 's natural pacemaker
heart 's natural pacemaker