{"version":"1.0","provider_name":"Best Spine Hospitals","provider_url":"https:\/\/www.bestspinehospitals.com\/blog","author_name":"drspine","author_url":"https:\/\/www.bestspinehospitals.com\/blog\/author\/drspine\/","title":"Preload: Definition, Uses, and Clinical Overview - Best Spine Hospitals","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"ecy4j5H7qn\"><a href=\"https:\/\/www.bestspinehospitals.com\/blog\/preload-definition-uses-and-clinical-overview\/\">Preload: Definition, Uses, and Clinical Overview<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/www.bestspinehospitals.com\/blog\/preload-definition-uses-and-clinical-overview\/embed\/#?secret=ecy4j5H7qn\" width=\"600\" height=\"338\" title=\"&#8220;Preload: Definition, Uses, and Clinical Overview&#8221; &#8212; Best Spine Hospitals\" data-secret=\"ecy4j5H7qn\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script type=\"text\/javascript\">\n\/* <![CDATA[ *\/\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:\/\/www.bestspinehospitals.com\/blog\/wp-includes\/js\/wp-embed.min.js\n\/* ]]> *\/\n<\/script>\n","description":"Preload is the amount of stretch on the heart muscle just before the heart contracts. It mainly reflects how much blood returns to the heart and fills the ventricles (the main pumping chambers). Clinicians use Preload as a core concept in heart failure, shock, and perioperative care. It is discussed when interpreting symptoms, physical exam findings, echocardiograms, and hemodynamic measurements."}