{"id":9257,"date":"2024-03-05T10:57:38","date_gmt":"2024-03-05T01:57:38","guid":{"rendered":"https:\/\/cardiovascularcenter.luke.ac.jp\/qfr\/"},"modified":"2025-04-03T13:54:42","modified_gmt":"2025-04-03T04:54:42","slug":"qfr","status":"publish","type":"page","link":"https:\/\/cardiovascularcenter.luke.ac.jp\/en\/qfr\/","title":{"rendered":"QFR"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"9257\" class=\"elementor elementor-9257 elementor-6286\" data-elementor-post-type=\"page\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-34a49fd9 elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"34a49fd9\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t\t<div class=\"elementor-background-overlay\"><\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-450b6043\" data-id=\"450b6043\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3e96c5d6 uael-heading-align-center elementor-widget elementor-widget-uael-advanced-heading\" data-id=\"3e96c5d6\" data-element_type=\"widget\" data-widget_type=\"uael-advanced-heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\n\t\t<div class=\"uael-module-content uael-heading-wrapper\">\n\t\t\t\t\t\t\n\t\t\t<h1 class=\"uael-heading\">\n\t\t\t\t\t\t\t\t\t\t<span class=\"uael-heading-text elementor-inline-editing uael-size--default\" data-elementor-setting-key=\"heading_title\" data-elementor-inline-editing-toolbar=\"basic\">QFR (Quantitative Flow Ratio)<\/span>\n\t\t\t\t\t\t\t<\/h1>\n\n\t\t\t\n\t\t\t\n\t\t\t\t\t\t\t<div class=\"uael-subheading elementor-inline-editing\" data-elementor-setting-key=\"heading_description\" data-elementor-inline-editing-toolbar=\"advanced\" >\n\t\t\t\t\t<font size=\"5\">A Less Invasive Method for Evaluating Coronary Artery Blood Flow<\/font>\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-d1bf265 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"d1bf265\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-2353ced3\" data-id=\"2353ced3\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2e2dabe8 elementor-align-left elementor-widget elementor-widget-breadcrumbs\" data-id=\"2e2dabe8\" data-element_type=\"widget\" data-widget_type=\"breadcrumbs.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<span id=\"breadcrumbs\"><span><span><a href=\"https:\/\/cardiovascularcenter.luke.ac.jp\/en\/\">Home<\/a><\/span><\/span><\/span>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-28a2e8a1 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"28a2e8a1\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div 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class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<nav class=\"elementor-nav-menu--dropdown elementor-nav-menu__container\" aria-hidden=\"true\">\n\t\t\t\t<ul id=\"menu-2-70263c64\" class=\"elementor-nav-menu\"><li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-9444\"><a href=\"https:\/\/cardiovascularcenter.luke.ac.jp\/en\/overview\/\" class=\"elementor-item\" tabindex=\"-1\">About<\/a><\/li>\n<li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-9445\"><a href=\"\/en\/treatments\" class=\"elementor-item\" tabindex=\"-1\">Medical Services<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-9446\"><a href=\"https:\/\/cardiovascularcenter.luke.ac.jp\/en\/staff\/\" class=\"elementor-item\" tabindex=\"-1\">Our Team<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-9447\"><a href=\"https:\/\/cardiovascularcenter.luke.ac.jp\/en\/outpatient_service\/\" 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href=\"https:\/\/cardiovascularcenter.luke.ac.jp\/\" title=\"Switch to \u65e5\u672c\u8a9e\" aria-label=\"Switch to \u65e5\u672c\u8a9e\" role=\"menuitem\" class=\"elementor-item\" tabindex=\"-1\"><span class=\"wpml-ls-native\" lang=\"ja\">\u65e5\u672c\u8a9e<\/span><\/a><\/li>\n<\/ul>\t\t\t<\/nav>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-76918f61\" data-id=\"76918f61\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4814ee1a elementor-widget elementor-widget-text-editor\" data-id=\"4814ee1a\" data-element_type=\"widget\" id=\"top\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3><strong>A Less Invasive Method for Evaluating Coronary Artery Blood Flow<\/strong><strong>: <\/strong><strong>QFR (Quantitative Flow Ratio)<\/strong><\/h3>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f9921b3 elementor-widget elementor-widget-video\" data-id=\"f9921b3\" data-element_type=\"widget\" data-settings=\"{&quot;youtube_url&quot;:&quot;https:\\\/\\\/youtu.be\\\/yDnCPSvSYTo&quot;,&quot;autoplay&quot;:&quot;yes&quot;,&quot;play_on_mobile&quot;:&quot;yes&quot;,&quot;mute&quot;:&quot;yes&quot;,&quot;lazy_load&quot;:&quot;yes&quot;,&quot;video_type&quot;:&quot;youtube&quot;,&quot;controls&quot;:&quot;yes&quot;}\" data-widget_type=\"video.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-wrapper elementor-open-inline\">\n\t\t\t<div class=\"elementor-video\"><\/div>\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b6688e5 elementor-widget elementor-widget-text-editor\" data-id=\"b6688e5\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The blood vessels that supply blood to the heart (coronary arteries) can become narrowed due to atherosclerosis. Traditionally, <span style=\"color: #333399;\"><strong>to determine whether catheter treatment is necessary to widen these lesions (whether a stent should be placed)<\/strong><\/span>, <span style=\"color: #333399;\"><strong>it was necessary to evaluate by directly inserting a special wire that measures blood flow (pressure) into the coronary artery lesion<\/strong><\/span>.<\/p>\n<p>When a coronary artery is narrowed, it becomes problematic if the blood supply to the heart muscle (myocardium) downstream is impaired. If the condition is severe, the need for treatment to improve blood flow increases. However, the body&#8217;s mechanism for regulating blood flow to the heart is complex, and <span style=\"color: #333399;\"><strong>it has been found difficult to judge this based solely on the &#8216;appearance&#8217; in images obtained from catheter examination<\/strong><\/span>. For this reason, <strong>it is considered appropriate to decide whether to place a stent in a narrowed coronary artery lesion <span style=\"text-decoration: underline;\">not based on &#8216;appearance&#8217; but on the <span style=\"color: #333399; text-decoration: underline;\">&#8216;rate of blood flow reduction&#8217;<\/span><\/span><\/strong>. However, to measure this blood flow, an additional examination is required in addition to the usual catheter examination (coronary angiography). This additional examination is called FFR testing, which <strong>measures the pressure inside the blood vessel before and after the narrowed lesion using a special wire to determine how much the blood flow has decreased due to the lesion<\/strong>.<\/p>\n<p>However, when measuring FFR, the need to administer special drugs and insert a wire into the coronary artery is known to <strong>pose a small but existing risk to patients<\/strong> <span style=\"color: #333399;\"><strong><span style=\"text-decoration: underline;\">of complications<\/span><\/strong><\/span><strong>.<\/strong><\/p>\n<p>As an alternative to this conventional wire-based blood flow measurement, <span style=\"color: #333399;\"><strong>QFR (Quantitative Flow Ratio)<\/strong><\/span>, a <strong>coronary artery blood flow analysis software<\/strong>, has been developed. QFR creates a 3D model of the coronary artery on a computer by combining catheter examination images taken from two directions, <strong>enabling highly accurate analysis of how much blood flow is reduced before and after the stenosis<\/strong>.<\/p>\n<p>Numerous studies have been conducted in many countries around the world, and <strong>there have been many reports stating that &#8216;QFR can safely and accurately determine the need for coronary artery treatment.&#8217;<\/strong> It has been in practical use in Europe since 2017, and in Japan, it received insurance approval in January 2024. Our hospital introduced it in February of the same year and welcomed the first patient in Japan.<\/p>\n<p>At our center, we perform QFR on patients who meet multiple conditions, <span style=\"color: #333399;\"><span style=\"text-decoration: underline;\"><strong>allowing for safer<\/strong><\/span> <strong>evaluation of coronary artery blood flow.<\/strong><\/span> Currently, we are somewhat strict with the conditions for its use, and it cannot be used for all patients, but please ask your attending physician if you are interested.<\/p>\n<p>For those who want to know more about the process of cardiac catheterization and treatment at our hospital, please refer to <a href=\"https:\/\/cardiovascularcenter.luke.ac.jp\/cath_our_hospital\/\"><b>here<\/b><\/a>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1d2151fa back-to-top elementor-widget elementor-widget-heading\" data-id=\"1d2151fa\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<span class=\"elementor-heading-title elementor-size-default\"><a href=\"#top\">TOP<\/a><\/span>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1f13be75 elementor-widget elementor-widget-image\" data-id=\"1f13be75\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"2560\" height=\"1440\" src=\"https:\/\/cardiovascularcenter.luke.ac.jp\/wpdata\/wp-content\/uploads\/2024\/03\/QFRHP-scaled.jpg\" class=\"attachment-full size-full wp-image-9107\" alt=\"\" srcset=\"https:\/\/cardiovascularcenter.luke.ac.jp\/wpdata\/wp-content\/uploads\/2024\/03\/QFRHP-scaled.jpg 2560w, https:\/\/cardiovascularcenter.luke.ac.jp\/wpdata\/wp-content\/uploads\/2024\/03\/QFRHP-500x281.jpg 500w, 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size-full wp-image-9108\" alt=\"\" srcset=\"https:\/\/cardiovascularcenter.luke.ac.jp\/wpdata\/wp-content\/uploads\/2024\/03\/QFR-analyze.jpg 1381w, https:\/\/cardiovascularcenter.luke.ac.jp\/wpdata\/wp-content\/uploads\/2024\/03\/QFR-analyze-500x334.jpg 500w, https:\/\/cardiovascularcenter.luke.ac.jp\/wpdata\/wp-content\/uploads\/2024\/03\/QFR-analyze-1024x684.jpg 1024w, https:\/\/cardiovascularcenter.luke.ac.jp\/wpdata\/wp-content\/uploads\/2024\/03\/QFR-analyze-768x513.jpg 768w\" sizes=\"(max-width: 1381px) 100vw, 1381px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-71ec9540 back-to-top elementor-widget elementor-widget-heading\" data-id=\"71ec9540\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<span class=\"elementor-heading-title elementor-size-default\"><a href=\"#top\">TOP<\/a><\/span>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-75e4837 elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"75e4837\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-39307f7a\" data-id=\"39307f7a\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-27010a63 elementor-align-center elementor-widget elementor-widget-button\" data-id=\"27010a63\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm elementor-animation-shrink\" href=\"https:\/\/cardiovascularcenter.luke.ac.jp\/treatments\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-icon\">\n\t\t\t\t<i aria-hidden=\"true\" class=\"fas fa-arrow-circle-left\"><\/i>\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Return to Main Diseases<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>QFR (Quantitative Flow Ratio) A Less Invasive Method for Evaluating Coronary Artery Blood Flow A Less Invasive Method for Evaluating Coronary Artery Blood Flow: QFR (Quantitative Flow Ratio) https:\/\/youtu.be\/yDnCPSvSYTo The blood vessels that supply blood to the heart (coronary arteries) can become narrowed due to atherosclerosis. Traditionally, to determine whether catheter treatment is necessary to [&hellip;]<\/p>\n","protected":false},"author":14,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-9257","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>QFR - \u8056\u8def\u52a0\u56fd\u969b\u75c5\u9662 \u5fc3\u8840\u7ba1\u30bb\u30f3\u30bf\u30fc<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cardiovascularcenter.luke.ac.jp\/en\/qfr\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"QFR - \u8056\u8def\u52a0\u56fd\u969b\u75c5\u9662 \u5fc3\u8840\u7ba1\u30bb\u30f3\u30bf\u30fc\" \/>\n<meta property=\"og:description\" content=\"QFR (Quantitative Flow Ratio) A Less Invasive Method for Evaluating Coronary Artery Blood Flow A Less Invasive Method for Evaluating Coronary Artery Blood Flow: QFR (Quantitative Flow Ratio) https:\/\/youtu.be\/yDnCPSvSYTo The blood vessels that supply blood to the heart (coronary arteries) can become narrowed due to atherosclerosis. 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