{"id":60078,"date":"2017-11-14T11:01:42","date_gmt":"2017-11-14T09:01:42","guid":{"rendered":"https:\/\/wpcalc.com\/?p=60078"},"modified":"2026-10-01T13:35:21","modified_gmt":"2026-10-01T10:35:21","slug":"right-ventricular-stroke-work-index","status":"publish","type":"post","link":"https:\/\/wpcalc.com\/en\/medical\/right-ventricular-stroke-work-index\/","title":{"rendered":"Right Ventricular Stroke Work Index"},"content":{"rendered":"<section class=\"not-prose calculator-box\" aria-labelledby=\"calculator-title\"><div class=\"flex items-baseline sm:items-center justify-between gap-2 sm:gap-3\"><div class=\"flex flex-col sm:flex-row sm:items-center gap-2\"><span class=\"icon icon-calculator text-primary-700! text-base! dark:text-primary-300!\" aria-hidden=\"true\"><\/span><h2 id=\"calculator-title\" class=\"text-lg font-display font-bold\">RVSWI Value Calculator<\/h2><\/div><div class=\"calcdash-favorite group\">\n  <button type=\"button\" class=\"favorite\" id=\"favorite\" data-favorite-id=\"60078\" data-favorite-title=\"Right Ventricular Stroke Work Index\" data-favorite-url=\"https:\/\/wpcalc.com\/en\/medical\/right-ventricular-stroke-work-index\/\" data-favorite-excerpt=\"Estimate the Right Ventricular Stroke Work Index (RVSWI) from mean pulmonary arterial pressure (MPAP) and stroke volume index (SVI). A quick hemodynamic tool for assessing right ventricular workload in pulmonary hypertension and heart failure.\" aria-label=\"Add to Favorites\" data-favorite-icon=\"icon icon-heartbeat\">\n    <span class=\"icon icon-shape-star-empty\" aria-hidden=\"true\"><\/span>\n  <\/button>\n  <div class=\"calcdash-favorite__tip\" aria-hidden=\"true\">\n   <span class=\"favorite-tooltip\" id=\"favorite-tooltip\"><\/span>\n  <\/div>\n  <span class=\"sr-only\" role=\"status\" id=\"favorite-status\"><\/span>\n<\/div><\/div><form action=\"https:\/\/wpcalc.com\/en\/medical\/right-ventricular-stroke-work-index\/\" method=\"POST\" class=\"calculator\" id=\"calculator-60078\" data-post=\"60078\"><fieldset class=\"fieldset-input\"><legend class=\"sr-only\">Input Fields<\/legend><div class=\"field has-term\" id=\"input-1\"><label for=\"field-1\">Mean pulmonary arterial pressure<\/label><div class=\"term\">mpap<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><input type=\"number\" name=\"mean_pulmonary_arterial_pressure\" id=\"field-1\" aria-describedby=\"calc-unit-1\" placeholder=\"Enter MPAP\" step=\"any\" value=\"25\"\/><div class=\"unit\" id=\"calc-unit-1\">mmHg<\/div><\/div><div class=\"field has-term\" id=\"input-2\"><label for=\"field-2\">Stroke volume index<\/label><div class=\"term\">svi<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><input type=\"number\" name=\"stroke_volume_index\" id=\"field-2\" aria-describedby=\"calc-unit-2\" placeholder=\"Enter SVI\" step=\"any\" value=\"35\"\/><div class=\"unit\" id=\"calc-unit-2\">mL\/m\u00b2<\/div><\/div><\/fieldset><div class=\"buttons\"><button type=\"submit\" data-text=\"Re-Calculate\" id=\"calculate-button\" data-post=\"60078\">Calculate<\/button><button type=\"reset\">Reset<\/button><\/div><div class=\"field is-checkbox hidden!\" id=\"field-auto-calc\"><input type=\"checkbox\" id=\"auto-calc\"><label for=\"auto-calc\">Calculate automatically<\/label><small>If enabled, the result will update automatically when you change any value.<\/small><\/div><div class=\"fieldset-result is-hidden\" aria-labelledby=\"result-title\" aria-live=\"polite\" role=\"region\"> <h3 class=\"result-title bg-gradient-to-r from-primary-50 to-gray-50 dark:from-primary-900 dark:to-gray-800\" id=\"result-title\"><span class=\"icon icon-s-pulse\" aria-hidden=\"true\"><\/span> Your Results<\/h3><div class=\"result-box\"><div class=\"field-result\" id=\"output-1\"><span class=\"field-title\"><span>Right ventricular stroke work index<\/span><\/span><span class=\"field-value\" id=\"result-1\" data-unit=\"g\u00b7m\/m\u00b2\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copy Result\" aria-label=\"Copy Result\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><\/div><div class=\"result-actions\"><button type=\"button\" class=\"copy-link\"><svg viewBox=\"0 0 20 20\" fill=\"currentColor\" aria-hidden=\"true\"><path d=\"M12.232 4.232a2.5 2.5 0 0 1 3.536 3.536l-1.225 1.224a.75.75 0 0 0 1.061 1.06l1.224-1.224a4 4 0 0 0-5.656-5.656l-3 3a4 4 0 0 0 .225 5.865.75.75 0 0 0 .977-1.138 2.5 2.5 0 0 1-.142-3.667l3-3Z\"\/><path d=\"M11.603 7.963a.75.75 0 0 0-.977 1.138 2.5 2.5 0 0 1 .142 3.667l-3 3a2.5 2.5 0 0 1-3.536-3.536l1.225-1.224a.75.75 0 0 0-1.061-1.06l-1.224 1.224a4 4 0 1 0 5.656 5.656l3-3a4 4 0 0 0-.225-5.865Z\"\/><\/svg><span class=\"copy-link__text\">Copy link to this calculation<\/span><\/button><span class=\"sr-only\" role=\"status\" id=\"copy-link-status\"><\/span><\/div><\/div><a href=\"#respond\" class=\"hidden transition-opacity duration-300 opacity-0 w-50 text-sm justify-center items-center gap-2 px-4 py-2 rounded bg-gray-200 text-gray-700 hover:bg-gray-300\" id=\"leave-comment\"><span class=\"icon icon-comments\" aria-hidden=\"true\"><\/span>Leave a Comment<\/a><\/form><\/section><section id=\"calc-reactions\" class=\"not-prose hidden my-12 bg-gradient-to-r from-primary-50 to-gray-50 border border-indigo-100 rounded-xl px-6 py-4 shadow-sm\" data-post=\"60078\" aria-live=\"polite\" aria-labelledby=\"calc-reactions-title\"><p id=\"calc-reactions-title\" class=\"text-sm text-gray-500 text-center mb-2\">How did this result make you feel?<\/p><div role=\"group\" aria-labelledby=\"calc-reactions-title\" class=\"grid grid-cols-3 sm:flex sm:flex-row sm:justify-around gap-4 sm:items-center sm:flex-wrap\"><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"like\"><span class=\"reaction-count\" data-reaction-count=\"like\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude00 <\/span><span class=\"reaction-description font-medium\">Like <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"helpful\"><span class=\"reaction-count\" data-reaction-count=\"helpful\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\udca1 <\/span><span class=\"reaction-description font-medium\">Helpful <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"confused\"><span class=\"reaction-count\" data-reaction-count=\"confused\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude15 <\/span><span class=\"reaction-description font-medium\">Confused <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"disappointed\"><span class=\"reaction-count\" data-reaction-count=\"disappointed\">1<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude1e <\/span><span class=\"reaction-description font-medium\">Disappointed <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"inaccurate\"><span class=\"reaction-count\" data-reaction-count=\"inaccurate\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\u274c <\/span><span class=\"reaction-description font-medium\">Inaccurate <\/span><\/button><\/div><div id=\"reaction-message\" class=\"hidden mt-8 rounded-md border border-primary-100 bg-white\/50 backdrop-blur-sm px-4 py-2 text-sm text-center shadow-sm\"><\/div><\/section><div class=\"calcdash-ad not-prose calcdash-ad--calc_result calcdash-ad--in-article\"><ins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-1721569815777345\" data-ad-slot=\"6317458308\" data-ad-layout=\"in-article\" data-ad-format=\"fluid\"><\/ins><script>(adsbygoogle = window.adsbygoogle || []).push({});<\/script><\/div>\n<style id=\"wpcoderpro-inline-1\">.formula-box {\r\n\tborder-bottom: none !important;\r\n}<\/style><section class=\"formula-box\" aria-labelledby=\"formula-title\">\r\n\t<div id=\"formula-title\" class=\"not-prose font-display mb-4\"><span class=\"icon icon-formula\" aria-hidden=\"true\"><\/span><h2>Right Ventricular Stroke Work Index Formula<\/h2><\/div>\r\n\t<figure class=\"not-prose formula\">\r\n\t\t<figcaption class=\"formula-title\">Formula<\/figcaption>\r\n\t\t<div class=\"text-base text-gray-800\" id=\"formula\">\n\\[ \\text{RVSWI} = 0.0144 \\times \\text{SVI} \\times \\text{MPAP} \\]\n<\/div>\r\n\t<\/figure>\r\n\t<\/p>\n<p><strong>Where:<\/strong><\/p>\n<ul>\n<li>\\(\\text{RVSWI}\\) \u2014 right ventricular stroke work index (g\u00b7m\/m\u00b2)<\/li>\n<li>\\(\\text{SVI}\\) \u2014 stroke volume index (mL\/m\u00b2, i.e. mL\/beat normalized to body surface area)<\/li>\n<li>\\(\\text{MPAP}\\) \u2014 mean pulmonary arterial pressure (mmHg)<\/li>\n<li>\\(0.0144\\) \u2014 conversion factor that turns mmHg \u00d7 mL into gram-meters (g\u00b7m)<\/li>\n<\/ul>\n<p>The formula multiplies the volume of blood ejected per heartbeat (indexed to body surface area) by the pressure the right ventricle must overcome, yielding the external work the ventricle performs per beat, per square meter of body surface area.<\/p>\n<p>\r\n<\/section>\n<style id=\"wpcoderpro-inline-459\">.calculation-box {\r\n\tborder-bottom: none !important;\r\n}<\/style><section id=\"calculation\" class=\"calculation-box\" aria-labelledby=\"calculation-title\">\r\n\t<div id=\"calculation-title\" class=\"not-prose font-display\"><span class=\"icon icon-unordered-list\" aria-hidden=\"true\"><\/span><h2>Right Ventricular Stroke Work Index \u2013 Calculation Example<\/h2><\/div>\r\n\r\n<\/p>\n<p><strong>Example:<\/strong> a patient undergoing right heart catheterization has a mean pulmonary arterial pressure of 25 mmHg and a stroke volume index of 35 mL\/m\u00b2.<\/p>\n<p>\\[ \\text{RVSWI} = 0.0144 \\times 35 \\times 25 = 12.6 \\ \\text{g\u00b7m\/m\u00b2} \\]<\/p>\n<p><strong>Result:<\/strong> the right ventricular stroke work index is <strong>12.6 g\u00b7m\/m\u00b2<\/strong>, which falls within the typical normal range of roughly 7\u201312 g\u00b7m\/m\u00b2, at its upper end \u2014 consistent with a moderately elevated right ventricular workload.<\/p>\n<p>\n\r\n<\/section>\n<h2>How to use the calculator<\/h2>\n<ol>\n<li>Enter the <strong>Mean pulmonary arterial pressure (MPAP)<\/strong> in mmHg, obtained from right heart catheterization or a pulmonary artery catheter.<\/li>\n<li>Enter the <strong>Stroke volume index (SVI)<\/strong> in mL\/m\u00b2. If you only have stroke volume and body surface area, divide stroke volume by BSA first, or use the <a href=\"https:\/\/wpcalc.com\/en\/medical\/cardiac-output\/\">Cardiac Output (Fick Method) calculator<\/a> to help derive the underlying values.<\/li>\n<li>Read the <strong>Right ventricular stroke work index<\/strong> in g\u00b7m\/m\u00b2 in the result field.<\/li>\n<\/ol>\n<h2>What is the right ventricular stroke work index?<\/h2>\n<p>The right ventricular stroke work index (RVSWI) quantifies the external work the right ventricle performs with each heartbeat, normalized to body surface area so that patients of different sizes can be compared. Work, in the physical sense, is pressure multiplied by volume: the right ventricle generates pressure to push a volume of blood through the pulmonary circulation into the left atrium.<\/p>\n<p>Unlike the left ventricle, which pumps against systemic vascular resistance, the right ventricle normally operates against a low-resistance, low-pressure pulmonary circuit. Because of this, the normal RVSWI is only about one fifth to one sixth of the left ventricular stroke work index \u2014 typically in the range of <strong>7\u201312 g\u00b7m\/m\u00b2<\/strong> (some references cite 5\u201310 g\u00b7m\/m\u00b2). This makes even modest changes in RVSWI clinically meaningful.<\/p>\n<p>RVSWI is measured or estimated during right heart catheterization and is used in intensive care units, catheterization laboratories, and pre-transplant evaluation. It plays a prominent role in assessing candidates for <strong>heart transplantation<\/strong> and mechanical circulatory support, and in evaluating patients with <strong>pulmonary hypertension<\/strong>, where the right ventricle must generate higher pressures to eject blood.<\/p>\n<h2>Interpreting the result<\/h2>\n<p>An <strong>elevated RVSWI<\/strong> indicates that the right ventricle is working harder than normal, most often because of increased pulmonary vascular resistance or pulmonary arterial pressure \u2014 the hallmark of pulmonary hypertension. A chronically elevated RVSWI suggests right ventricular adaptation (hypertrophy), but if the pressure rise outpaces the ventricle's ability to compensate, RVSWI eventually falls as the ventricle begins to fail.<\/p>\n<p>A <strong>low RVSWI<\/strong> points to right ventricular dysfunction or failure: the ventricle cannot generate adequate pressure or volume, so its external work per beat declines. Low values are associated with worse outcomes in advanced heart failure and after cardiac surgery. Always interpret RVSWI alongside other hemodynamic measurements such as cardiac output, central venous pressure, and pulmonary vascular resistance \u2014 the <a href=\"https:\/\/wpcalc.com\/en\/medical\/pulmonary-vascular-resistance\/\">Pulmonary Vascular Resistance calculator<\/a> and the <a href=\"https:\/\/wpcalc.com\/en\/medical\/mean-arterial-pressure\/\">Mean Arterial Pressure calculator<\/a> cover related parameters.<\/p>\n<p>For a broader picture of pumping performance, RVSWI is often read together with <a href=\"https:\/\/wpcalc.com\/en\/medical\/ejection-fraction\/\">ejection fraction<\/a>, which describes what fraction of the ventricular volume is ejected with each beat.<\/p>\n<h2>Assumptions and limitations<\/h2>\n<ul>\n<li><strong> Catheterization data required:<\/strong> both MPAP and SVI come from invasive hemodynamic monitoring, most reliably from right heart catheterization. Estimates from echocardiography are less accurate.<\/li>\n<li><strong> Simplified formula:<\/strong> the full definition of stroke work subtracts right atrial pressure (preload) and includes afterload components; the common bedside formula used here omits the right atrial pressure term, so it slightly overestimates true stroke work. Many centers accept this simplification for routine use.<\/li>\n<li><strong> Indexation to BSA:<\/strong> SVI must already be normalized to body surface area. Entering a raw stroke volume (mL\/beat) instead of SVI will produce an erroneously large result.<\/li>\n<li><strong> Unit sensitivity:<\/strong> MPAP must be in mmHg and SVI in mL\/m\u00b2; mixing units (e.g. cmH\u2082O or L\/min) invalidates the calculation.<\/li>\n<li><strong> Not a standalone diagnosis:<\/strong> RVSWI is one hemodynamic variable among many. Interpret it in the full clinical context, together with imaging, laboratory findings, and other catheterization-derived indices.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Estimate the Right Ventricular Stroke Work Index (RVSWI) from mean pulmonary arterial pressure (MPAP) and stroke volume index (SVI). A quick hemodynamic tool for assessing right ventricular workload in pulmonary hypertension and heart failure.<\/p>\n","protected":false},"author":70,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[8],"tags":[15],"class_list":["post-60078","post","type-post","status-publish","format-standard","hentry","category-medical","tag-cardiology"],"acf":[],"_links":{"self":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/60078","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/users\/70"}],"replies":[{"embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/comments?post=60078"}],"version-history":[{"count":2,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/60078\/revisions"}],"predecessor-version":[{"id":66343,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/60078\/revisions\/66343"}],"wp:attachment":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/media?parent=60078"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/categories?post=60078"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/tags?post=60078"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}