div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: · the heart muscle This electrical current makes the heart beat and can be delivered as needed to keep your heart beating at a healthy rate the heart Sinoatrial SA Node Atrioventricular src=https:reader034vdocumentsusreader034viewer20220421135e8ece5ff2e0496c0650a982html5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 2button div class=ts-image amp-img class=ts-thumb alt=Page 2: · the heart muscle This electrical current makes the heart beat and can be delivered as needed to keep your heart beating at a healthy rate the heart Sinoatrial SA Node Atrioventricular src=https:reader034vdocumentsusreader034viewer20220421135e8ece5ff2e0496c0650a982html5thumbnails2jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 3button div class=ts-image amp-img class=ts-thumb alt=Page 3: · the heart muscle This electrical current makes the heart beat and can be delivered as needed to keep your heart beating at a healthy rate the heart Sinoatrial SA Node Atrioventricular src=https:reader034vdocumentsusreader034viewer20220421135e8ece5ff2e0496c0650a982html5thumbnails3jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 4button div class=ts-image amp-img class=ts-thumb alt=Page 4: · the heart muscle This electrical current makes the heart beat and can be delivered as needed to keep your heart beating at a healthy rate the heart Sinoatrial SA Node Atrioventricular src=https:reader034vdocumentsusreader034viewer20220421135e8ece5ff2e0496c0650a982html5thumbnails4jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 5button div class=ts-image amp-img class=ts-thumb alt=Page 5: · the heart muscle This electrical current makes the heart beat and can be delivered as needed to keep your heart beating at a healthy rate the heart Sinoatrial SA Node Atrioventricular src=https:reader034vdocumentsusreader034viewer20220421135e8ece5ff2e0496c0650a982html5thumbnails5jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 6button div class=ts-image amp-img class=ts-thumb alt=Page 6: · the heart muscle This electrical current makes the heart beat and can be delivered as needed to keep your heart beating at a healthy rate the heart Sinoatrial SA Node Atrioventricular src=https:reader034vdocumentsusreader034viewer20220421135e8ece5ff2e0496c0650a982html5thumbnails6jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 7button div class=ts-image amp-img class=ts-thumb alt=Page 7: · the heart muscle This electrical current makes the heart beat and can be delivered as needed to keep your heart beating at a healthy rate the heart Sinoatrial SA Node Atrioventricular src=https:reader034vdocumentsusreader034viewer20220421135e8ece5ff2e0496c0650a982html5thumbnails7jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 8button div class=ts-image amp-img class=ts-thumb alt=Page 8: · the heart muscle This electrical current makes the heart beat and can be delivered as needed to keep your heart beating at a healthy rate the heart Sinoatrial SA Node Atrioventricular src=https:reader034vdocumentsusreader034viewer20220421135e8ece5ff2e0496c0650a982html5thumbnails8jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 9button div class=ts-image amp-img class=ts-thumb alt=Page 9: · the heart muscle This electrical current makes the heart beat and can be delivered as needed to keep your heart beating at a healthy rate the heart Sinoatrial SA Node Atrioventricular src=https:reader034vdocumentsusreader034viewer20220421135e8ece5ff2e0496c0650a982html5thumbnails9jpg width=142 height=106 layout=responsive amp-img divdiv