1.0All About Heart And Blood Vesselshttps://johnsonfrancis.org/generalJohnson Francishttps://johnsonfrancis.org/general/author/jf/rich600338<blockquote class="wp-embedded-content" data-secret="FvDHyWb9Up"><a href="https://johnsonfrancis.org/general/how-is-an-ecg-taken/">How is an ECG taken?</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://johnsonfrancis.org/general/how-is-an-ecg-taken/embed/#?secret=FvDHyWb9Up" width="600" height="338" title="“How is an ECG taken?” — All About Heart And Blood Vessels" data-secret="FvDHyWb9Up" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script> /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); //# sourceURL=https://johnsonfrancis.org/general/wp-includes/js/wp-embed.min.js </script> https://johnsonfrancis.org/general/wp-content/uploads/2022/02/How-is-an-ECG-taken.jpg1200677How is an ECG taken? ECG is short for electrocardiogram, the recording of the electrical activity of the heart. It is recorded by placing metallic contacts known as electrodes in specified parts of the limbs and chest and connecting them to the ECG machine known as an electrocardiograph. The electrical signals from the heart detected […]