SA NODE SA NODE sa node āļ āļēāļŦāļāđāļēāļāļĩāđāđāļāđāļ pacemaker āļŦāļĨāļąāļāļāļāļāļŦāļąāļ§āđāļāļĄāļĩfiring rate 60 100 āļāļĢāļąāđāļāļāđāļāļāļēāļāļĩ av junction āļĄāļĩ firing rate 40 60 āļāļĢāļąāđāļāļāđāļāļāļēāļāļĩ ventricle (purkinje fibers) āļĄāļĩ
SA NODE āđāļāļĨāļĨāđāļāļāļ sa node āļāļĢāļ°āļāļēāļĒāļāļąāļ§āļāļĒāļđāđāđāļāļāļēāļāđāļēāļĒāļāļāļāđāļāļ·āđāļāđāļĒāļ·āđāļāđāļāļĩāđāļĒāļ§āļāļąāļ āļāļķāđāļāļāļĢāļ°āļāļāļāļāđāļ§āļĒ āđāļŠāđāļāļāļĢāļ°āļŠāļēāļ āļŦāļĨāļāļāđāļĨāļ·āļāļ āļāļāļĨ āļĨāļēāđāļāļ āđāļĨāļ° āđāļāļĄāļąāļ āđāļāļĨāļĨāđāļāļēāļĢāļēāđāļāļāļąāļĨāļāļ°āļĨāđāļāļĄāļĢāļ āđāļāļĢāđāļĄāļāļąāđāļāļŠāļĨāđāļāļthe sinoatrial node is an oval shaped region of special cardiac muscle in the upper back wall of the right atrium made up of cells known as pacemaker cells āđāļāļĨāđāļāļĒ google · āļāļđāļāđāļāļāļāļąāļ (english) sa node āļāļēāļāļāļāļāļĢāļ§āļāđāļĢāđāļ§ the sinoatrial (sa) node represents the integrated activity of pacemaker cells, sometimes called p cells, in a compact region at the bigwin sa node āđāļāļāļĄāļ§āļĒ
SA NODE the sa node is sometimes called the heart's ânatural pacemaker â when an electrical impulse is released from the sa node, it causes the heart's upper chambers āļāļēāļāļāļāļāļĢāļ§āļāđāļĢāđāļ§ sa node āđāļāļāļąāļŠāļāļĢāļĩ an electrical stimulus is generated by the sinus node (also called the sinoatrial node, or sa node) this is a small āļāļāļĨāļāļāđāļĨāđāļāļāļĢāļĩ sa node āđāļ§āđāļāļāļĢāļ100%