<div class="relative">
    <header id="accordion_header" class="flex flex_row sticky t_n2 bg_white shadow_overlap-light br_solid br_1 br_black-2 z_2 ">
        <div class="h:bg_primary-5 m_2 c_primary h:c_primary-n2 br_radius">
            <div class="flex_none" aria-expanded="false" data-bs-toggle="collapse" data-bs-target="#content_accordion" aria-controls="#content_accordion">
                    <span class="fa-stack">
                    <i class="fas fa-minus fa-stack-1x"></i>
                    <i class="fas fa-minus rotate_90 a:rotation fa-stack-1x "></i>
                    </span>
            </div>        </div>
        <div class=" font-size_up flex_auto flex flex_row justify_center p-y_2">
            <div class="flex_auto self_center reading-typography no-margins">
               <h3> Accordion Header Level 3</h3>
            </div>
        </div>
    </header>
    <main id="content_accordion" class="bg_black-_05 br-bl_radius br-br_radius m-x_0 m-x_3:md p_3 p_4:md reading-typography shadow_emboss-light tab-content transition_4"  aria-labelledby="accordion_header m-x_3" >
    <div class="reading-typography ">
        <h1>Lorem Ipsum</h1>
        <p><strong>Pellentesque habitant morbi tristique</strong> senectus et netus et malesuada fames ac turpis egestas. Vestibulum tortor quam, feugiat vitae, ultricies eget, tempor sit amet, ante. <a href="#random2" target="_blank">Pellentesque</a> sit amet quam egestas semper. <em>Aenean ultricies mi vitae est.</em> Mauris placerat eleifend leo. Quisque sit amet est et sapien ullamcorper pharetra. Vestibulum erat wisi, condimentum sed, <code>commodo vitae</code>, ornare sit amet, wisi. Aenean fermentum, elit eget tincidunt condimentum, eros ipsum rutrum orci, sagittis tempus lacus enim ac dui. <a href="#random">Donec non enim</a> in turpis pulvinar facilisis. Ut felis.</p>
        <h2>Header Level 2</h2>
        <ol>
            <li>Lorem ipsum dolor sit amet, consectetuer adipiscing elit.</li>
            <li>Aliquam tincidunt mauris eu risus.</li>
        </ol>
        <blockquote><p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus magna. Cras in mi at felis aliquet congue. Ut a est eget ligula molestie gravida. Curabitur massa. Donec eleifend, libero at sagittis mollis, tellus est malesuada tellus, at luctus turpis elit sit amet quam. Vivamus pretium ornare est.</p></blockquote>
        <h3>Header Level 3</h3>
        <ul>
            <li>Lorem ipsum dolor sit amet, consectetuer adipiscing elit.</li>
            <li>Aliquam tincidunt mauris eu risus.</li>
        </ul>
        <button class="btn btn-primary">Button</button>
    	<details>
            <summary ><strong>Table of Contents</strong></summary>
            <div>
                <ol>
                    <li data-line="0" dir="auto">How to Prepare for the Boards</li>
                    <li data-line="1" dir="auto">General Principles of Cardiovascular Medicine
                    </li>
                    <li data-line="2" dir="auto">Arrhythmias</li>
                    <li data-line="3" dir="auto">Coronary Artery Disease</li>
                    <li data-line="4" dir="auto">Heart Failure &amp; Cardiomyopathy</li>
                    <li data-line="5" dir="auto">Valvular Disease</li>
                    <li data-line="6" dir="auto">Pericardial Disease</li>
                    <li data-line="7" dir="auto">Congenital Heart Disease</li>
                    <li data-line="8" dir="auto">Vascular Diseases</li>
                    <li data-line="9" dir="auto">Systemic Hypertension and Hypotension</li>
                    <li data-line="10" dir="auto">Pulmonary Circulation Disorders</li>
                    <li data-line="11" dir="auto">Systemic Disorders Affecting the Circulatory
                        System</li>
                    <li data-line="12" dir="auto">
                        Miscellaneous
                        <ul>
                            <li data-line="13" dir="auto">Cardiovascular Genetics</li>
                            <li data-line="14" dir="auto">CPR, Post-Resuscitation Care</li>
                            <li data-line="15" dir="auto">Cardiac Critical Care</li>
                            <li data-line="16" dir="auto">Sleep Disordered Breathing</li>
                            <li data-line="17" dir="auto">Sports Cardiology</li>
                            <li data-line="18" dir="auto">Pregnancy and Cardiac Disease</li>
                            <li data-line="19" dir="auto">Cardiovascular Operative Management
                            </li>
                            <li data-line="20" dir="auto">Pharmacology</li>
                            <li data-line="21" dir="auto">General Principles of Cardiovascular
                                Medicine</li>
                        </ul>
                    </li>
                </ol>
            </div>
        </details>
    </div>    </main>
</div>

<div class="relative m-b_2">
    <header id="accordion_header-child" class="flex flex_row sticky t_5 bg_white shadow_bevel-light br_radius br_solid br_1 br_black-2 z_3 ">
        <div class="h:bg_primary-4 m_2 c_primary h:c_primary-n3 br_radius">
            <div class="flex_none p_2" data-bs-toggle="collapse" data-bs-target="#content_accordion-child" aria-controls="#content_accordion-child" aria-expanded="true">
                    <i class="a:rotation fa-fw fa-times fas self_center text_center"></i>
            </div>        </div>
        <div class=" flex_auto flex flex_row justify_center p-y_2">
            <div class="flex_auto self_center reading-typography no-margins">
                <h4> Nested Accordion Header Level 4</h4>
            </div>
        </div>
    </header>
    <main id="content_accordion-child" class="bg_black-1 m-t_n2 br_radius p-t_3 p-x_3 p-x_4:md p-b_4 reading-typography tab-content transition_4 shadow_emboss-light"  aria-labelledby="accordion_header-child" >
    <div class="reading-typography ">
        <h1>Lorem Ipsum</h1>
        <p><strong>Pellentesque habitant morbi tristique</strong> senectus et netus et malesuada fames ac turpis egestas. Vestibulum tortor quam, feugiat vitae, ultricies eget, tempor sit amet, ante. <a href="#random2" target="_blank">Pellentesque</a> sit amet quam egestas semper. <em>Aenean ultricies mi vitae est.</em> Mauris placerat eleifend leo. Quisque sit amet est et sapien ullamcorper pharetra. Vestibulum erat wisi, condimentum sed, <code>commodo vitae</code>, ornare sit amet, wisi. Aenean fermentum, elit eget tincidunt condimentum, eros ipsum rutrum orci, sagittis tempus lacus enim ac dui. <a href="#random">Donec non enim</a> in turpis pulvinar facilisis. Ut felis.</p>
        <h2>Header Level 2</h2>
        <ol>
            <li>Lorem ipsum dolor sit amet, consectetuer adipiscing elit.</li>
            <li>Aliquam tincidunt mauris eu risus.</li>
        </ol>
        <blockquote><p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus magna. Cras in mi at felis aliquet congue. Ut a est eget ligula molestie gravida. Curabitur massa. Donec eleifend, libero at sagittis mollis, tellus est malesuada tellus, at luctus turpis elit sit amet quam. Vivamus pretium ornare est.</p></blockquote>
        <h3>Header Level 3</h3>
        <ul>
            <li>Lorem ipsum dolor sit amet, consectetuer adipiscing elit.</li>
            <li>Aliquam tincidunt mauris eu risus.</li>
        </ul>
        <button class="btn btn-primary">Button</button>
    	<details>
            <summary ><strong>Table of Contents</strong></summary>
            <div>
                <ol>
                    <li data-line="0" dir="auto">How to Prepare for the Boards</li>
                    <li data-line="1" dir="auto">General Principles of Cardiovascular Medicine
                    </li>
                    <li data-line="2" dir="auto">Arrhythmias</li>
                    <li data-line="3" dir="auto">Coronary Artery Disease</li>
                    <li data-line="4" dir="auto">Heart Failure &amp; Cardiomyopathy</li>
                    <li data-line="5" dir="auto">Valvular Disease</li>
                    <li data-line="6" dir="auto">Pericardial Disease</li>
                    <li data-line="7" dir="auto">Congenital Heart Disease</li>
                    <li data-line="8" dir="auto">Vascular Diseases</li>
                    <li data-line="9" dir="auto">Systemic Hypertension and Hypotension</li>
                    <li data-line="10" dir="auto">Pulmonary Circulation Disorders</li>
                    <li data-line="11" dir="auto">Systemic Disorders Affecting the Circulatory
                        System</li>
                    <li data-line="12" dir="auto">
                        Miscellaneous
                        <ul>
                            <li data-line="13" dir="auto">Cardiovascular Genetics</li>
                            <li data-line="14" dir="auto">CPR, Post-Resuscitation Care</li>
                            <li data-line="15" dir="auto">Cardiac Critical Care</li>
                            <li data-line="16" dir="auto">Sleep Disordered Breathing</li>
                            <li data-line="17" dir="auto">Sports Cardiology</li>
                            <li data-line="18" dir="auto">Pregnancy and Cardiac Disease</li>
                            <li data-line="19" dir="auto">Cardiovascular Operative Management
                            </li>
                            <li data-line="20" dir="auto">Pharmacology</li>
                            <li data-line="21" dir="auto">General Principles of Cardiovascular
                                Medicine</li>
                        </ul>
                    </li>
                </ol>
            </div>
        </details>
    </div>    </main>
</div>

<div class="relative">
    <header id="accordion_header-nested" class="flex flex_row sticky t_n2 bg_white shadow_overlap-light br_solid br_1 br_black-2 z_2 ">
        <div class="h:bg_primary-5 m_2 c_primary h:c_primary-n2 br_radius">
            <div class="flex_none" aria-expanded="false" data-bs-toggle="collapse" data-bs-target="#content_accordion-parent" aria-controls="#content_accordion-parent">
                    <span class="fa-stack">
                    <i class="fas fa-minus fa-stack-1x"></i>
                    <i class="fas fa-minus rotate_90 a:rotation fa-stack-1x "></i>
                    </span>
            </div>        </div>
        <div class=" font-size_up flex_auto flex flex_row justify_center p-y_2">
            <div class="flex_auto self_center reading-typography no-margins">
               <h3> Accordion Header Level 3</h3>
            </div>
        </div>
    </header>
    <main id="content_accordion-parent" class="bg_black-_05 br-bl_radius br-br_radius m-x_3:md p_3 p_4:md reading-typography shadow_emboss-light tab-content transition_4"  aria-labelledby="accordion_header-nested" >
        <h2>Aenean commodo ligula eget dolor aenean massa</h2>
        <p>Lorem ipsum dolor sit amet, consectetuer adipiscing
        elit. Aenean commodo ligula eget dolor. Aenean massa.
        Cum sociis natoque penatibus et magnis dis parturient
        montes, nascetur ridiculus mus. Donec quam felis,
        ultricies nec, pellentesque eu, pretium quis, sem.</p>
        <div class="relative m-b_2">
            <header id="accordion_header-child" class="flex flex_row sticky t_5 bg_white shadow_bevel-light br_radius br_solid br_1 br_black-2 z_3 ">
                <div class="h:bg_primary-4 m_2 c_primary h:c_primary-n3 br_radius">
                    <div class="flex_none p_2" data-bs-toggle="collapse" data-bs-target="#content_accordion-child" aria-controls="#content_accordion-child" aria-expanded="true">
                            <i class="a:rotation fa-fw fa-times fas self_center text_center"></i>
                    </div>        </div>
                <div class=" flex_auto flex flex_row justify_center p-y_2">
                    <div class="flex_auto self_center reading-typography no-margins">
                        <h4> Nested Accordion Header Level 4</h4>
                    </div>
                </div>
            </header>
            <main id="content_accordion-child" class="bg_black-1 m-t_n2 br_radius p-t_3 p-x_3 p-x_4:md p-b_4 reading-typography tab-content transition_4 shadow_emboss-light"  aria-labelledby="accordion_header-child" >
            <div class="reading-typography ">
                <h1>Lorem Ipsum</h1>
                <p><strong>Pellentesque habitant morbi tristique</strong> senectus et netus et malesuada fames ac turpis egestas. Vestibulum tortor quam, feugiat vitae, ultricies eget, tempor sit amet, ante. <a href="#random2" target="_blank">Pellentesque</a> sit amet quam egestas semper. <em>Aenean ultricies mi vitae est.</em> Mauris placerat eleifend leo. Quisque sit amet est et sapien ullamcorper pharetra. Vestibulum erat wisi, condimentum sed, <code>commodo vitae</code>, ornare sit amet, wisi. Aenean fermentum, elit eget tincidunt condimentum, eros ipsum rutrum orci, sagittis tempus lacus enim ac dui. <a href="#random">Donec non enim</a> in turpis pulvinar facilisis. Ut felis.</p>
                <h2>Header Level 2</h2>
                <ol>
                    <li>Lorem ipsum dolor sit amet, consectetuer adipiscing elit.</li>
                    <li>Aliquam tincidunt mauris eu risus.</li>
                </ol>
                <blockquote><p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus magna. Cras in mi at felis aliquet congue. Ut a est eget ligula molestie gravida. Curabitur massa. Donec eleifend, libero at sagittis mollis, tellus est malesuada tellus, at luctus turpis elit sit amet quam. Vivamus pretium ornare est.</p></blockquote>
                <h3>Header Level 3</h3>
                <ul>
                    <li>Lorem ipsum dolor sit amet, consectetuer adipiscing elit.</li>
                    <li>Aliquam tincidunt mauris eu risus.</li>
                </ul>
                <button class="btn btn-primary">Button</button>
            	<details>
                    <summary ><strong>Table of Contents</strong></summary>
                    <div>
                        <ol>
                            <li data-line="0" dir="auto">How to Prepare for the Boards</li>
                            <li data-line="1" dir="auto">General Principles of Cardiovascular Medicine
                            </li>
                            <li data-line="2" dir="auto">Arrhythmias</li>
                            <li data-line="3" dir="auto">Coronary Artery Disease</li>
                            <li data-line="4" dir="auto">Heart Failure &amp; Cardiomyopathy</li>
                            <li data-line="5" dir="auto">Valvular Disease</li>
                            <li data-line="6" dir="auto">Pericardial Disease</li>
                            <li data-line="7" dir="auto">Congenital Heart Disease</li>
                            <li data-line="8" dir="auto">Vascular Diseases</li>
                            <li data-line="9" dir="auto">Systemic Hypertension and Hypotension</li>
                            <li data-line="10" dir="auto">Pulmonary Circulation Disorders</li>
                            <li data-line="11" dir="auto">Systemic Disorders Affecting the Circulatory
                                System</li>
                            <li data-line="12" dir="auto">
                                Miscellaneous
                                <ul>
                                    <li data-line="13" dir="auto">Cardiovascular Genetics</li>
                                    <li data-line="14" dir="auto">CPR, Post-Resuscitation Care</li>
                                    <li data-line="15" dir="auto">Cardiac Critical Care</li>
                                    <li data-line="16" dir="auto">Sleep Disordered Breathing</li>
                                    <li data-line="17" dir="auto">Sports Cardiology</li>
                                    <li data-line="18" dir="auto">Pregnancy and Cardiac Disease</li>
                                    <li data-line="19" dir="auto">Cardiovascular Operative Management
                                    </li>
                                    <li data-line="20" dir="auto">Pharmacology</li>
                                    <li data-line="21" dir="auto">General Principles of Cardiovascular
                                        Medicine</li>
                                </ul>
                            </li>
                        </ol>
                    </div>
                </details>
            </div>    </main>
        </div>        <div class="relative m-b_2">
            <header id="accordion_header-child" class="flex flex_row sticky t_5 bg_white shadow_bevel-light br_radius br_solid br_1 br_black-2 z_3 ">
                <div class="h:bg_primary-4 m_2 c_primary h:c_primary-n3 br_radius">
                    <div class="flex_none p_2" data-bs-toggle="collapse" data-bs-target="#content_accordion-child" aria-controls="#content_accordion-child" aria-expanded="true">
                            <i class="a:rotation fa-fw fa-times fas self_center text_center"></i>
                    </div>        </div>
                <div class=" flex_auto flex flex_row justify_center p-y_2">
                    <div class="flex_auto self_center reading-typography no-margins">
                        <h4> Nested Accordion Header Level 4</h4>
                    </div>
                </div>
            </header>
            <main id="content_accordion-child" class="bg_black-1 m-t_n2 br_radius p-t_3 p-x_3 p-x_4:md p-b_4 reading-typography tab-content transition_4 shadow_emboss-light"  aria-labelledby="accordion_header-child" >
            <div class="reading-typography ">
                <h1>Lorem Ipsum</h1>
                <p><strong>Pellentesque habitant morbi tristique</strong> senectus et netus et malesuada fames ac turpis egestas. Vestibulum tortor quam, feugiat vitae, ultricies eget, tempor sit amet, ante. <a href="#random2" target="_blank">Pellentesque</a> sit amet quam egestas semper. <em>Aenean ultricies mi vitae est.</em> Mauris placerat eleifend leo. Quisque sit amet est et sapien ullamcorper pharetra. Vestibulum erat wisi, condimentum sed, <code>commodo vitae</code>, ornare sit amet, wisi. Aenean fermentum, elit eget tincidunt condimentum, eros ipsum rutrum orci, sagittis tempus lacus enim ac dui. <a href="#random">Donec non enim</a> in turpis pulvinar facilisis. Ut felis.</p>
                <h2>Header Level 2</h2>
                <ol>
                    <li>Lorem ipsum dolor sit amet, consectetuer adipiscing elit.</li>
                    <li>Aliquam tincidunt mauris eu risus.</li>
                </ol>
                <blockquote><p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus magna. Cras in mi at felis aliquet congue. Ut a est eget ligula molestie gravida. Curabitur massa. Donec eleifend, libero at sagittis mollis, tellus est malesuada tellus, at luctus turpis elit sit amet quam. Vivamus pretium ornare est.</p></blockquote>
                <h3>Header Level 3</h3>
                <ul>
                    <li>Lorem ipsum dolor sit amet, consectetuer adipiscing elit.</li>
                    <li>Aliquam tincidunt mauris eu risus.</li>
                </ul>
                <button class="btn btn-primary">Button</button>
            	<details>
                    <summary ><strong>Table of Contents</strong></summary>
                    <div>
                        <ol>
                            <li data-line="0" dir="auto">How to Prepare for the Boards</li>
                            <li data-line="1" dir="auto">General Principles of Cardiovascular Medicine
                            </li>
                            <li data-line="2" dir="auto">Arrhythmias</li>
                            <li data-line="3" dir="auto">Coronary Artery Disease</li>
                            <li data-line="4" dir="auto">Heart Failure &amp; Cardiomyopathy</li>
                            <li data-line="5" dir="auto">Valvular Disease</li>
                            <li data-line="6" dir="auto">Pericardial Disease</li>
                            <li data-line="7" dir="auto">Congenital Heart Disease</li>
                            <li data-line="8" dir="auto">Vascular Diseases</li>
                            <li data-line="9" dir="auto">Systemic Hypertension and Hypotension</li>
                            <li data-line="10" dir="auto">Pulmonary Circulation Disorders</li>
                            <li data-line="11" dir="auto">Systemic Disorders Affecting the Circulatory
                                System</li>
                            <li data-line="12" dir="auto">
                                Miscellaneous
                                <ul>
                                    <li data-line="13" dir="auto">Cardiovascular Genetics</li>
                                    <li data-line="14" dir="auto">CPR, Post-Resuscitation Care</li>
                                    <li data-line="15" dir="auto">Cardiac Critical Care</li>
                                    <li data-line="16" dir="auto">Sleep Disordered Breathing</li>
                                    <li data-line="17" dir="auto">Sports Cardiology</li>
                                    <li data-line="18" dir="auto">Pregnancy and Cardiac Disease</li>
                                    <li data-line="19" dir="auto">Cardiovascular Operative Management
                                    </li>
                                    <li data-line="20" dir="auto">Pharmacology</li>
                                    <li data-line="21" dir="auto">General Principles of Cardiovascular
                                        Medicine</li>
                                </ul>
                            </li>
                        </ol>
                    </div>
                </details>
            </div>    </main>
        </div>    </main>
</div>

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        <li class="flex flex_row flex_none h:c_primary lh_2 m-b_1 relative">
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        </li>        <li class="flex flex_row flex_auto flex_50 h:c_primary lh_2 m-b_1 overflow_hidden relative">
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            <div class="flex flex_row flex_nowrap overflow_ellipsis nowrap">
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            <li class="nav-item flex_auto br_radius c_white-8 h:bg_black-9 h:c_white a:c_white a:bg_primary h:shadow_overlap-light a:shadow_overlap-light ">
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        </ul>
    </nav>
    <script src="../js/library/library.main-nav.js"></script>
    <!-- These Styles are just for the styleguide and are not to be included with the pattern. -->

<nav data-attr="utility-nav">
	<ul class="flex ul_none justify_end">
		<li class="p-x_3 flex_shrink">
			<a class="h:underline c_primary h:c_secondary-n1"
				href="//www.acc.org/guidelines#doctype=Guidelines"
				title="Access ACC guidelines and clinical policy documents as well as related resources"
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			>
		</li>
		<li class="p-x_3 flex_shrink br-l_1 br_solid br_black-4">
			<a class="h:underline c_primary h:c_secondary-n1" href="http://www.onlinejacc.org/" target="_blank" title="JACC.org"
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			>
		</li>
		<li class="p-x_3 flex_shrink br-l_1 br_solid br_black-4">
			<a class="h:underline c_primary h:c_secondary-n1"
				href="http://accscientificsession.acc.org"
				target="_blank"
				title="ACC Annual Scientific Session Together With World Congress of Cardiology Website"
				>ACC.20/WCC</a
			>
		</li>
		<li class="p-x_3 flex_shrink br-l_1 br_solid br_black-4">
			<a class="h:underline c_primary h:c_secondary-n1"
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			>
		</li>
		<li class="p-x_3 flex_shrink br-l_1 br_solid br_black-4">
			<a class="h:underline c_primary h:c_secondary-n1"
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<nav class="nav-sub bg_primary c_white font_2 font_ui ">
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        <li class="nav-item font-size_up" data-nav="parent">
            <div class="bg_black-4 ">
                <a class="text-shadow_black-1 block w_100 c_white p-y_2 p-x_4 w_100 h:c_white inline-block h:underline self_center">Parent Link: Tree starts from this node</a>
            </div>
        </li>        <li class="nav-item " data-nav="child">
            <div class="flex flex_row">
                <div class="flex flex_column flex_none justify_start">
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        </li>        <li class="nav-item " data-nav="child">
            <div class="flex flex_row">
                <div class="collapsed br-r_1 br_solid br_white-2 flex flex_column flex_none justify_start text-shadow_black-n1 c_white">
                    <div class="flex_none" aria-expanded="false" data-bs-toggle="collapse" data-bs-target=".childNavCollapse" aria-controls=".childNavCollapse">
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                            <i class="fas fa-minus rotate_90 a:rotation fa-stack-1x "></i>
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                    </div></div>        <div class="flex_auto self_center">
                    <a class="text-shadow_black-1  c_white-9 p-y_2 p-x_3 w_100 h:c_white inline-block h:underline self_center  a:bg_black-3">Child with Children Links</a>
                    <nav class="nav-sub-child bg_white-2 font-size_down collapse childNavCollapse" >
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                            </li>                    <li class="nav-item " data-nav="child">
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                    <a class="text-shadow_black-1  c_white-9 p-y_2 p-x_3 w_100 h:c_white inline-block h:underline self_center  a:bg_black-3">Child Link</a>
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        </li>        <li class="nav-item " data-nav="child">
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                    <a class="text-shadow_black-1  c_white-9 p-y_2 p-x_3 w_100 h:c_white inline-block h:underline self_center  a:bg_black-3">Child Link</a>
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        </li>        <li class="nav-item active" data-nav="child">
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                <div class="active br-r_1 br_solid br_white-2 flex flex_column flex_none justify_start text-shadow_black-n1 c_white">
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                    </div></div>        <div class="flex_auto self_center">
                    <a class="text-shadow_black-1 active c_white-9 p-y_2 p-x_3 w_100 h:c_white inline-block h:underline self_center  a:bg_black-3">Child with Children Links</a>
                    <nav class="nav-sub-child bg_white-2 font-size_down collapse childNavCollapse show">
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                                        <a class="text-shadow_black-1  c_white-9 p-y_2 p-x_3 w_100 h:c_white inline-block h:underline self_center  a:bg_black-3">Child Link</a>
                                    </div>
                                </div>
                            </li>                    <li class="nav-item " data-nav="child">
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                                                <i class="fas fa-spacer fa-stack-1x"></i>
                                            </span>
                                        </div>
                                    </div>
                                    <div class="flex_auto self_center">
                                        <a class="text-shadow_black-1  c_white-9 p-y_2 p-x_3 w_100 h:c_white inline-block h:underline self_center  a:bg_black-3">Child Link</a>
                                    </div>
                                </div>
                            </li>                    <li class="nav-item " data-nav="child">
                                <div class="flex flex_row">
                                    <div class="flex flex_column flex_none justify_start">
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                                                <i class="fas fa-spacer fa-stack-1x"></i>
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                                        </div>
                                    </div>
                                    <div class="flex_auto self_center">
                                        <a class="text-shadow_black-1  c_white-9 p-y_2 p-x_3 w_100 h:c_white inline-block h:underline self_center  a:bg_black-3">Child Link</a>
                                    </div>
                                </div>
                            </li>                    <li class="nav-item  active " data-nav="grandchild">
                                <div class="flex flex_row">
                                    <div class="active br-r_1 br_solid br_white-2 flex flex_column flex_none justify_start text-shadow_black-n1 c_white">
                                        <div class="flex_none" aria-expanded="false" data-bs-toggle="collapse" data-bs-target=".childNavCollapse" aria-controls=".childNavCollapse">
                                                <span class="fa-stack">
                                                <i class="fas fa-minus fa-stack-1x"></i>
                                                <i class="fas fa-minus rotate_90 a:rotation fa-stack-1x "></i>
                                                </span>
                                        </div></div>                            <div class="flex_auto self_center">
                                        <a class="text-shadow_black-1 active c_white-9 p-y_2 p-x_3 w_100 h:c_white inline-block h:underline self_center  a:bg_black-3">Child with Children Links</a>
                                        <nav class="nav-sub-child bg_white-2 collapse show childNavCollapse">
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                                                <li class="nav-item  " data-nav="greatGrandChild">
                                                    <div class="flex flex_row">
                                                        <div class="flex_auto self_center">
                                                            <a class="  text-shadow_black-1  a:bg_black-3 c_white-9 p-y_2 p-r_3 p-l_4 w_100 h:c_white inline-block h:underline self_center">Great Grand Child Links</a>
                                                        </div>
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                                                </li>                                        <li class="nav-item  " data-nav="greatGrandChild">
                                                    <div class="flex flex_row">
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                                                            <a class="  text-shadow_black-1  a:bg_black-3 c_white-9 p-y_2 p-r_3 p-l_4 w_100 h:c_white inline-block h:underline self_center">Great Grand Child Links</a>
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                                                </li>                                        <li class="nav-item active " data-nav="greatGrandChild">
                                                    <div class="flex flex_row">
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                                                            <a class=" active text-shadow_black-1  a:bg_black-3 c_white-9 p-y_2 p-r_3 p-l_4 w_100 h:c_white inline-block h:underline self_center">Great Grand Child Links</a>
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                                                </li>                                        <li class="nav-item  " data-nav="greatGrandChild">
                                                    <div class="flex flex_row">
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                                                            <a class="  text-shadow_black-1  a:bg_black-3 c_white-9 p-y_2 p-r_3 p-l_4 w_100 h:c_white inline-block h:underline self_center">Great Grand Child Links</a>
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<li class="nav-item font-size_up" data-nav="parent">
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        <a class="text-shadow_black-1 block w_100 c_white p-y_2 p-x_4 w_100 h:c_white inline-block h:underline self_center">Parent Link: Tree starts from this node</a>
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</li>

<div class="[modifier] br-r_1 br_solid br_white-2 flex flex_column flex_none justify_start text-shadow_black-n1 c_white">
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<li class="nav-item [modifier]" data-nav="child">
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            <a class="text-shadow_black-1 [modifier] c_white-9 p-y_2 p-x_3 w_100 h:c_white inline-block h:underline self_center  a:bg_black-3">Child Link</a>
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<li class="nav-item " data-nav="child">
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        <div class="collapsed br-r_1 br_solid br_white-2 flex flex_column flex_none justify_start text-shadow_black-n1 c_white">
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            <a class="text-shadow_black-1  c_white-9 p-y_2 p-x_3 w_100 h:c_white inline-block h:underline self_center  a:bg_black-3">Child with Children Links</a>
            <nav class="nav-sub-child bg_white-2 font-size_down collapse childNavCollapse" >
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            <a class="text-shadow_black-1 active c_white-9 p-y_2 p-x_3 w_100 h:c_white inline-block h:underline self_center  a:bg_black-3">Child with Children Links</a>
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                                <a class="text-shadow_black-1  c_white-9 p-y_2 p-x_3 w_100 h:c_white inline-block h:underline self_center  a:bg_black-3">Child Link</a>
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                    </li>                    <li class="nav-item " data-nav="child">
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                                <a class="text-shadow_black-1  c_white-9 p-y_2 p-x_3 w_100 h:c_white inline-block h:underline self_center  a:bg_black-3">Child Link</a>
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                                <a class="text-shadow_black-1  c_white-9 p-y_2 p-x_3 w_100 h:c_white inline-block h:underline self_center  a:bg_black-3">Child Link</a>
                            </div>
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                    </li>                    <li class="nav-item  active " data-nav="grandchild">
                        <div class="flex flex_row">
                            <div class="active br-r_1 br_solid br_white-2 flex flex_column flex_none justify_start text-shadow_black-n1 c_white">
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                                <a class="text-shadow_black-1 active c_white-9 p-y_2 p-x_3 w_100 h:c_white inline-block h:underline self_center  a:bg_black-3">Child with Children Links</a>
                                <nav class="nav-sub-child bg_white-2 collapse show childNavCollapse">
                                    <ul class="ul_none flex_column flex">
                                        <li class="nav-item  " data-nav="greatGrandChild">
                                            <div class="flex flex_row">
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                                                    <a class="  text-shadow_black-1  a:bg_black-3 c_white-9 p-y_2 p-r_3 p-l_4 w_100 h:c_white inline-block h:underline self_center">Great Grand Child Links</a>
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                                                    <a class="  text-shadow_black-1  a:bg_black-3 c_white-9 p-y_2 p-r_3 p-l_4 w_100 h:c_white inline-block h:underline self_center">Great Grand Child Links</a>
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                                        </li>                                        <li class="nav-item active " data-nav="greatGrandChild">
                                            <div class="flex flex_row">
                                                <div class="flex_auto self_center">
                                                    <a class=" active text-shadow_black-1  a:bg_black-3 c_white-9 p-y_2 p-r_3 p-l_4 w_100 h:c_white inline-block h:underline self_center">Great Grand Child Links</a>
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                                        </li>                                        <li class="nav-item  " data-nav="greatGrandChild">
                                            <div class="flex flex_row">
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                                                    <a class="  text-shadow_black-1  a:bg_black-3 c_white-9 p-y_2 p-r_3 p-l_4 w_100 h:c_white inline-block h:underline self_center">Great Grand Child Links</a>
                                                </div>
                                            </div>
                                        </li>                                    </ul>
                                </nav>
                            </div>
                        </div>
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            </nav>
        </div>
    </div>
</li>

<li class="nav-item [modifier] " data-nav="greatGrandChild">
    <div class="flex flex_row">
        <div class="flex_auto self_center">
            <a class=" [modifier] text-shadow_black-1  a:bg_black-3 c_white-9 p-y_2 p-r_3 p-l_4 w_100 h:c_white inline-block h:underline self_center">Great Grand Child Links</a>
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        <li class="flex_auto m-r_2"><a href="https://twitter.com/accintouch" target="_blank" class="twitter social-bar--button block m-b_0 p_3 c_white text_center opacity_7 h:opacity"><i class="fab fa-square-x-twitter"></i></a></li>
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                <h3 class="font_accent font_1 m-b_0 font_normal font_regular">American College of Cardiology</h3>
                <address>
                    <!-- http://microformats.org/wiki/hcard -->
                    <h4 class="m-b_0 font_bold font_copy font_normal font_1 m-t_4">Heart House</h4>
                    <div class="flex flex_column flex_row:md font_0 font_copy gap-x_5">
                    <div class="flex_auto">
                        <ul class="ul_none lh_0">
                            <li class="m-b_1 m-b_3:md font_normal">
                                <span class="street-address">2400 N St. NW</span>
                            </li>
                            <li class="m-b_1 m-b_3:md font_normal">
                                <span class="locality ">Washington</span>,
                                <span class="city-name ">
                            <abbr title="District of Colombia">DC</abbr>
                            </span>
                                <span class="postal-code">20037</span>
                            </li>
                            <li class="m-b_1 m-b_3:md font_normal">
                                <a href="mailto:MemberCare@acc.org" class="email c_white text_underline  h:c_white ">
                                    <strong class="p-r_2 inline block:md inline:lg">Email:</strong>
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                            <a tel="+12023756000" href="tel:+12023756000" class="tel c_white h:c_white h:underline">
                            <strong class="p-r_2 block inline:lg">Phone:</strong><span class=" block inline:lg">1-202-375-6000</span></a>
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                            <a tel="+18002534636" href="tel:+18002534636" class="tel c_white h:c_white h:underline">
                            <strong class="p-r_2 block inline:lg">Toll Free:</strong><span class=" block inline:lg">1-800-253-4636</span></a>
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            </section>            <!-- Social -->
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                    <summary ><strong>Table of Contents</strong></summary>
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                            <li data-line="0" dir="auto">How to Prepare for the Boards</li>
                            <li data-line="1" dir="auto">General Principles of Cardiovascular Medicine
                            </li>
                            <li data-line="2" dir="auto">Arrhythmias</li>
                            <li data-line="3" dir="auto">Coronary Artery Disease</li>
                            <li data-line="4" dir="auto">Heart Failure &amp; Cardiomyopathy</li>
                            <li data-line="5" dir="auto">Valvular Disease</li>
                            <li data-line="6" dir="auto">Pericardial Disease</li>
                            <li data-line="7" dir="auto">Congenital Heart Disease</li>
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                            <li data-line="9" dir="auto">Systemic Hypertension and Hypotension</li>
                            <li data-line="10" dir="auto">Pulmonary Circulation Disorders</li>
                            <li data-line="11" dir="auto">Systemic Disorders Affecting the Circulatory
                                System</li>
                            <li data-line="12" dir="auto">
                                Miscellaneous
                                <ul>
                                    <li data-line="13" dir="auto">Cardiovascular Genetics</li>
                                    <li data-line="14" dir="auto">CPR, Post-Resuscitation Care</li>
                                    <li data-line="15" dir="auto">Cardiac Critical Care</li>
                                    <li data-line="16" dir="auto">Sleep Disordered Breathing</li>
                                    <li data-line="17" dir="auto">Sports Cardiology</li>
                                    <li data-line="18" dir="auto">Pregnancy and Cardiac Disease</li>
                                    <li data-line="19" dir="auto">Cardiovascular Operative Management
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                                    <li data-line="20" dir="auto">Pharmacology</li>
                                    <li data-line="21" dir="auto">General Principles of Cardiovascular
                                        Medicine</li>
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                    <li>Aliquam tincidunt mauris eu risus.</li>
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                <h3>Header Level 3</h3>
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                        <ol>
                            <li data-line="0" dir="auto">How to Prepare for the Boards</li>
                            <li data-line="1" dir="auto">General Principles of Cardiovascular Medicine
                            </li>
                            <li data-line="2" dir="auto">Arrhythmias</li>
                            <li data-line="3" dir="auto">Coronary Artery Disease</li>
                            <li data-line="4" dir="auto">Heart Failure &amp; Cardiomyopathy</li>
                            <li data-line="5" dir="auto">Valvular Disease</li>
                            <li data-line="6" dir="auto">Pericardial Disease</li>
                            <li data-line="7" dir="auto">Congenital Heart Disease</li>
                            <li data-line="8" dir="auto">Vascular Diseases</li>
                            <li data-line="9" dir="auto">Systemic Hypertension and Hypotension</li>
                            <li data-line="10" dir="auto">Pulmonary Circulation Disorders</li>
                            <li data-line="11" dir="auto">Systemic Disorders Affecting the Circulatory
                                System</li>
                            <li data-line="12" dir="auto">
                                Miscellaneous
                                <ul>
                                    <li data-line="13" dir="auto">Cardiovascular Genetics</li>
                                    <li data-line="14" dir="auto">CPR, Post-Resuscitation Care</li>
                                    <li data-line="15" dir="auto">Cardiac Critical Care</li>
                                    <li data-line="16" dir="auto">Sleep Disordered Breathing</li>
                                    <li data-line="17" dir="auto">Sports Cardiology</li>
                                    <li data-line="18" dir="auto">Pregnancy and Cardiac Disease</li>
                                    <li data-line="19" dir="auto">Cardiovascular Operative Management
                                    </li>
                                    <li data-line="20" dir="auto">Pharmacology</li>
                                    <li data-line="21" dir="auto">General Principles of Cardiovascular
                                        Medicine</li>
                                </ul>
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                            <li data-line="0" dir="auto">How to Prepare for the Boards</li>
                            <li data-line="1" dir="auto">General Principles of Cardiovascular Medicine
                            </li>
                            <li data-line="2" dir="auto">Arrhythmias</li>
                            <li data-line="3" dir="auto">Coronary Artery Disease</li>
                            <li data-line="4" dir="auto">Heart Failure &amp; Cardiomyopathy</li>
                            <li data-line="5" dir="auto">Valvular Disease</li>
                            <li data-line="6" dir="auto">Pericardial Disease</li>
                            <li data-line="7" dir="auto">Congenital Heart Disease</li>
                            <li data-line="8" dir="auto">Vascular Diseases</li>
                            <li data-line="9" dir="auto">Systemic Hypertension and Hypotension</li>
                            <li data-line="10" dir="auto">Pulmonary Circulation Disorders</li>
                            <li data-line="11" dir="auto">Systemic Disorders Affecting the Circulatory
                                System</li>
                            <li data-line="12" dir="auto">
                                Miscellaneous
                                <ul>
                                    <li data-line="13" dir="auto">Cardiovascular Genetics</li>
                                    <li data-line="14" dir="auto">CPR, Post-Resuscitation Care</li>
                                    <li data-line="15" dir="auto">Cardiac Critical Care</li>
                                    <li data-line="16" dir="auto">Sleep Disordered Breathing</li>
                                    <li data-line="17" dir="auto">Sports Cardiology</li>
                                    <li data-line="18" dir="auto">Pregnancy and Cardiac Disease</li>
                                    <li data-line="19" dir="auto">Cardiovascular Operative Management
                                    </li>
                                    <li data-line="20" dir="auto">Pharmacology</li>
                                    <li data-line="21" dir="auto">General Principles of Cardiovascular
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                    <summary ><strong>Table of Contents</strong></summary>
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                        <ol>
                            <li data-line="0" dir="auto">How to Prepare for the Boards</li>
                            <li data-line="1" dir="auto">General Principles of Cardiovascular Medicine
                            </li>
                            <li data-line="2" dir="auto">Arrhythmias</li>
                            <li data-line="3" dir="auto">Coronary Artery Disease</li>
                            <li data-line="4" dir="auto">Heart Failure &amp; Cardiomyopathy</li>
                            <li data-line="5" dir="auto">Valvular Disease</li>
                            <li data-line="6" dir="auto">Pericardial Disease</li>
                            <li data-line="7" dir="auto">Congenital Heart Disease</li>
                            <li data-line="8" dir="auto">Vascular Diseases</li>
                            <li data-line="9" dir="auto">Systemic Hypertension and Hypotension</li>
                            <li data-line="10" dir="auto">Pulmonary Circulation Disorders</li>
                            <li data-line="11" dir="auto">Systemic Disorders Affecting the Circulatory
                                System</li>
                            <li data-line="12" dir="auto">
                                Miscellaneous
                                <ul>
                                    <li data-line="13" dir="auto">Cardiovascular Genetics</li>
                                    <li data-line="14" dir="auto">CPR, Post-Resuscitation Care</li>
                                    <li data-line="15" dir="auto">Cardiac Critical Care</li>
                                    <li data-line="16" dir="auto">Sleep Disordered Breathing</li>
                                    <li data-line="17" dir="auto">Sports Cardiology</li>
                                    <li data-line="18" dir="auto">Pregnancy and Cardiac Disease</li>
                                    <li data-line="19" dir="auto">Cardiovascular Operative Management
                                    </li>
                                    <li data-line="20" dir="auto">Pharmacology</li>
                                    <li data-line="21" dir="auto">General Principles of Cardiovascular
                                        Medicine</li>
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