{"version":"1.0","provider_name":"All About Cardiovascular System and Disorders","provider_url":"https:\/\/johnsonfrancis.org\/professional","author_name":"Johnson Francis","author_url":"https:\/\/johnsonfrancis.org\/professional\/author\/jf\/","title":"Diagnostic criteria for left bundle branch block - All About Cardiovascular System and Disorders","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"dpNxaum3SS\"><a href=\"https:\/\/johnsonfrancis.org\/professional\/diagnostic-criteria-for-left-bundle-branch-block\/\">Diagnostic criteria for left bundle branch block<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/johnsonfrancis.org\/professional\/diagnostic-criteria-for-left-bundle-branch-block\/embed\/#?secret=dpNxaum3SS\" width=\"600\" height=\"338\" title=\"&#8220;Diagnostic criteria for left bundle branch block&#8221; &#8212; All About Cardiovascular System and Disorders\" data-secret=\"dpNxaum3SS\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\n\/*! This file is auto-generated *\/\n!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);\n\/\/# sourceURL=https:\/\/johnsonfrancis.org\/professional\/wp-includes\/js\/wp-embed.min.js\n<\/script>\n","thumbnail_url":"https:\/\/johnsonfrancis.org\/professional\/wp-content\/uploads\/2025\/08\/Diagnostic-Criteria-for-Left-Bundle-Branch-Block.jpg","thumbnail_width":1202,"thumbnail_height":675,"description":"Complete left bundle branch block has widening of the QRS complex to 120 ms or more. If LBBB pattern is seen with QRS width less than 120 ms, it may be called incomplete left bundle branch block, though that term is rarely used in practice. Broad, notched or slurred R waves in lateral leads I, [&hellip;]"}