div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imageimg data-url=documentthe-heart-muscle-this-electrical-current-makes-the-heart-beat-and-can-be-deliveredhtmlpage=1 data-page=1 class=trans-thumb lazyload 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 loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader034fdocumentsinreader034viewer20220421135e8ece5ff2e0496c0650a982html5thumbnails1jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imageimg data-url=documentthe-heart-muscle-this-electrical-current-makes-the-heart-beat-and-can-be-deliveredhtmlpage=2 data-page=2 class=trans-thumb lazyload 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 loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader034fdocumentsinreader034viewer20220421135e8ece5ff2e0496c0650a982html5thumbnails2jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=3Page 3button div class=trans-imageimg data-url=documentthe-heart-muscle-this-electrical-current-makes-the-heart-beat-and-can-be-deliveredhtmlpage=3 data-page=3 class=trans-thumb lazyload 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 loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII=...