{"id":12166,"date":"2026-03-21T18:09:15","date_gmt":"2026-03-21T09:09:15","guid":{"rendered":"https:\/\/miragen.clinic\/autonomic-nervous-system-test\/"},"modified":"2026-07-10T21:29:32","modified_gmt":"2026-07-10T12:29:32","slug":"autonomic-nervous-system-test","status":"publish","type":"page","link":"https:\/\/miragen.clinic\/en\/autonomic-nervous-system-test\/","title":{"rendered":"Autonomic Nervous System Test"},"content":{"rendered":"\n<div class=\"wp-block-group has-custom-color-4-background-color has-background has-global-padding is-layout-constrained wp-container-core-group-is-layout-e96bc7c8 wp-block-group-is-layout-constrained\" style=\"padding-top:240px;padding-right:var(--wp--preset--spacing--superbspacing-small);padding-bottom:240px;padding-left:var(--wp--preset--spacing--superbspacing-small)\">\n<p class=\"has-custom-color-6-color has-text-color has-link-color wp-elements-9ab3840d1f02b8c6f2441cb2a465d08f wp-block-paragraph\">Tests<\/p>\n\n\n\n<h1 class=\"wp-block-heading has-text-align-left has-custom-color-1-color has-text-color has-link-color wp-elements-bba5733e72aab83555eca123a10f74b9\">Autonomic Nervous System Test (HRV) | Identifying the Cause of Flushing That Worsens in Specific Situations<\/h1>\n<\/div>\n\n<div class=\"wp-block-group has-custom-color-2-background-color has-background has-global-padding is-layout-constrained wp-container-core-group-is-layout-1b17c90e wp-block-group-is-layout-constrained\" style=\"margin-top:0;margin-bottom:0;padding-top:var(--wp--preset--spacing--superbspacing-xlarge);padding-right:var(--wp--preset--spacing--superbspacing-small);padding-bottom:var(--wp--preset--spacing--superbspacing-xlarge);padding-left:var(--wp--preset--spacing--superbspacing-small)\">\n<div class=\"wp-block-rank-math-toc-block has-custom-color-5-color has-custom-color-11-background-color has-text-color has-background has-link-color wp-elements-993f77fafd90071015f6e83a2839692a\" style=\"padding-top:var(--wp--preset--spacing--superbspacing-xsmall);padding-right:0;padding-bottom:var(--wp--preset--spacing--superbspacing-xsmall);padding-left:0\" id=\"rank-math-toc\"><h2>Table of Contents<\/h2><nav><ul><li class=\"\"><a href=\"#sec-1\">1. What Is the Autonomic Nervous System Test?<\/a><\/li><li class=\"\"><a href=\"#sec-2\">2. Why Is It Necessary?<\/a><\/li><li class=\"\"><a href=\"#sec-3\">3. How Is It Performed?<\/a><\/li><li class=\"\"><a href=\"#sec-4\">4. How Are Results Interpreted?<\/a><\/li><li class=\"\"><a href=\"#sec-faq\">Frequently Asked Questions<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"sec-1\">1. What Is the Autonomic Nervous System Test?<\/h2>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-custom-color-5-color has-alpha-channel-opacity has-custom-color-5-background-color has-background is-style-wide\" style=\"margin-top:var(--wp--preset--spacing--superbspacing-xsmall);margin-bottom:var(--wp--preset--spacing--superbspacing-xsmall)\"\/>\n\n\n\n<p class=\"wp-block-paragraph\">The autonomic nervous system test (HRV, Heart Rate Variability) analyzes variations in heartbeat intervals to assess the balance of the autonomic nervous system. At our clinic, it is used to identify the underlying cause of flushing that worsens in specific situations. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The autonomic nervous system consists of the sympathetic and parasympathetic nervous systems. The sympathetic nervous system responds to stress and excitement, while the parasympathetic nervous system is responsible for relaxation and recovery. In a healthy state, these two systems maintain balance, causing subtle variations in heart rate intervals. Greater variation indicates that the autonomic nervous system is functioning flexibly.  <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When the sympathetic nervous system is overactive, heart rate variability decreases and shows a more consistent pattern. The HRV test quantifies this difference. <\/p>\n\n\n\n<figure class=\"wp-block-image alignwide size-large\"><img decoding=\"async\" src=\"https:\/\/miragen.clinic\/wp-content\/uploads\/2026\/06\/sympathetic-pathway-diagram-EN.jpeg\" alt=\"Diagram illustrating the sympathetic pathway of emotional flushing. Shows how emotional stimuli activate the sympathetic nervous system, leading to vasodilation that causes flushing and sweat gland response that produces sweating simultaneously. \" class=\"wp-image-9275\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"sec-2\">2. Why Is It Necessary?<\/h2>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-custom-color-5-color has-alpha-channel-opacity has-custom-color-5-background-color has-background is-style-wide\" style=\"margin-top:var(--wp--preset--spacing--superbspacing-xsmall);margin-bottom:var(--wp--preset--spacing--superbspacing-xsmall)\"\/>\n\n\n\n<p class=\"wp-block-paragraph\">There are various causes of facial redness. Among them, <strong>emotional flushing<\/strong> that occurs during stress or heightened emotions and <a href=\"\/blog\/&#xC2E0;&#xACBD;&#xC131;-&#xC8FC;&#xC0AC;&#xD53C;&#xBD80;&#xC5FC;-&#xD64D;&#xC870;\/\">neurogenic rosacea<\/a> that responds to heat or spicy foods may appear similar but have different causes and treatments. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The HRV test is the first step in this differentiation. Since symptoms alone make differentiation difficult, it is necessary to determine the direction of flushing treatment. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It objectively identifies whether the sympathetic nervous system is overactive or within the normal range through quantitative measurements to determine the cause of flushing.<\/p>\n\n\n\n<ul class=\"wp-block-list has-custom-color-5-color has-text-color has-link-color wp-elements-d33811762a6358c1346e0c7c8ef13c39\">\n<li><strong>Sympathetic overactivity + normal <a href=\"https:\/\/miragen.clinic\/en\/tewl-test\/\">TEWL<\/a><\/strong> \u2192 Possible emotional flushing<\/li>\n\n\n\n<li><strong>Normal autonomic nervous system + elevated TEWL<\/strong> \u2192 Possible neurogenic rosacea<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"sec-3\">3. How Is It Performed?<\/h2>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-custom-color-5-color has-alpha-channel-opacity has-custom-color-5-background-color has-background is-style-wide\" style=\"margin-top:var(--wp--preset--spacing--superbspacing-xsmall);margin-bottom:var(--wp--preset--spacing--superbspacing-xsmall)\"\/>\n\n\n\n<figure class=\"wp-block-image alignwide size-large\"><img decoding=\"async\" src=\"https:\/\/miragen.clinic\/wp-content\/uploads\/2026\/06\/hrv-test-illustration-v2-EN.jpeg\" alt=\"Illustration showing the autonomic nervous system test (HRV) procedure. A patient sits comfortably with clip-type electrodes attached to both wrists and ankles while being tested with an HRV measurement device. \" class=\"wp-image-9265\" title=\"Autonomic Nervous System Test (HRV) Procedure\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Clip-type electrodes are attached to both wrists and ankles, and measurements are taken for 1\u20135 minutes while sitting in a comfortable position. No needles or medications are used, and there is no pain whatsoever. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Pre-Test Precautions<\/h3>\n\n\n\n<ul class=\"wp-block-list has-custom-color-5-color has-text-color has-link-color wp-elements-c383010289835c42711a9f11c267f448\">\n<li>Avoid caffeine (coffee, energy drinks) and smoking from <strong>2 hours before<\/strong> the test<\/li>\n\n\n\n<li>Avoid <strong>vigorous exercise<\/strong> immediately before the test<\/li>\n\n\n\n<li>Rest for <strong>at least 5 minutes<\/strong> after arrival before measurement<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The autonomic nervous system responds sensitively to caffeine, nicotine, and exercise. These precautions must be followed for accurate results. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"sec-4\">4. How Are Results Interpreted?<\/h2>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-custom-color-5-color has-alpha-channel-opacity has-custom-color-5-background-color has-background is-style-wide\" style=\"margin-top:var(--wp--preset--spacing--superbspacing-xsmall);margin-bottom:var(--wp--preset--spacing--superbspacing-xsmall)\"\/>\n\n\n\n<p class=\"wp-block-paragraph\">The two most important indicators in HRV test results are:<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-custom-color-5-color has-text-color has-link-color has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Indicator<\/th><th class=\"has-text-align-left\" data-align=\"left\">Meaning<\/th><th class=\"has-text-align-left\" data-align=\"left\">Interpretation<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\"><strong>LF\/HF Ratio<\/strong><\/td><td class=\"has-text-align-left\" data-align=\"left\">Balance between sympathetic and parasympathetic nervous systems<\/td><td class=\"has-text-align-left\" data-align=\"left\">1.5 or higher indicates sympathetic dominance<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><strong>RMSSD<\/strong><\/td><td class=\"has-text-align-left\" data-align=\"left\">Parasympathetic nervous system activity<\/td><td class=\"has-text-align-left\" data-align=\"left\">Below 20 indicates reduced parasympathetic activity<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>If LF\/HF is high and RMSSD is low<\/strong>, the sympathetic nervous system is overactive and the parasympathetic nervous system is not providing sufficient inhibition. In such cases, emotional flushing is likely, and beta-blockers and stress management may be helpful. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>If both indicators are within normal range<\/strong>, flushing via the sensory nerve (TRPV1) pathway rather than the autonomic nervous system is suspected. In this case, a comprehensive assessment is made together with <a href=\"https:\/\/miragen.clinic\/en\/tewl-test\/\">TEWL test<\/a> results. <\/p>\n\n\n\n<figure class=\"wp-block-image alignwide size-large\"><img decoding=\"async\" src=\"https:\/\/miragen.clinic\/wp-content\/uploads\/2026\/06\/autonomic-balance-seesaw-EN.jpeg\" alt=\"Illustration comparing autonomic nervous system balance using a seesaw metaphor. Depicts a normal state with balanced sympathetic and parasympathetic nervous systems versus a state with sympathetic overactivity, compared using LF\/HF ratio. \" class=\"wp-image-9276\" title=\"Autonomic Nervous System Sympathetic-Parasympathetic Balance\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-dots\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"&#xCC38;&#xACE0;&#xBB38;&#xD5CC;\">References<\/h3>\n\n\n\n<ol class=\"wp-block-list has-custom-color-5-color has-text-color has-link-color has-superbfont-xxsmall-font-size wp-elements-de9e149190664b7f170b673d1513bc8e\">\n<li><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/29034818\/\" target=\"_blank\" rel=\"noopener\"><em>Shaffer F, Ginsberg JP. An Overview of Heart Rate Variability Metrics and Norms. Front Public Health. 2017;5:258.   <\/em><\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/41404901\/\" target=\"_blank\" rel=\"noopener\"><em>Wu C, Zhang K, Guo Y, et al. Clinical Characteristics and Serum CGRP Level Differences Between Neurogenic Rosacea and Non-neurogenic Rosacea. Int J Dermatol. 2025;64 Suppl 2:42-51.   <\/em><\/a><\/li>\n<\/ol>\n<\/div>\n\n<div class=\"wp-block-group has-custom-color-6-background-color has-background has-global-padding is-layout-constrained wp-container-core-group-is-layout-4c3b03bf wp-block-group-is-layout-constrained\" style=\"padding-top:var(--wp--preset--spacing--superbspacing-xlarge);padding-right:var(--wp--preset--spacing--superbspacing-small);padding-bottom:var(--wp--preset--spacing--superbspacing-xlarge);padding-left:var(--wp--preset--spacing--superbspacing-small)\">\n<h2 class=\"wp-block-heading\" id=\"sec-faq\">Frequently Asked Questions<\/h2>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-custom-color-5-color has-alpha-channel-opacity has-custom-color-5-background-color has-background is-style-wide\" style=\"margin-top:var(--wp--preset--spacing--superbspacing-xsmall);margin-bottom:var(--wp--preset--spacing--superbspacing-xsmall)\"\/>\n\n\n<div id=\"rank-math-faq\" class=\"rank-math-block\">\n<div class=\"rank-math-list \">\n<div id=\"faq-hrv-1001\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \">How much does the test cost?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>It is a non-covered test, and the cost is 30,000 won.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-hrv-1002\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \">Is the test painful?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>It is not painful at all. Clip-type electrodes are attached to the wrists and ankles, and measurement takes 1\u20135 minutes. No needles or medications are used.  <\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-hrv-1003\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \">Are results available immediately?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>Yes, results are available immediately after measurement. They are explained during the consultation. <\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-hrv-1004\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \">How often is the test performed?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>It is performed once during the initial visit, and additional measurements are taken as needed based on treatment progress.<\/p>\n\n<\/div>\n<\/div>\n<\/div>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Tests Autonomic Nervous System Test (HRV) | Identifying the Cause of Flushing That Worsens in Specific Situations 1. What Is the Autonomic Nervous System Test? The autonomic nervous system test (HRV, Heart Rate Variability) analyzes variations in heartbeat intervals to assess the balance of the autonomic nervous system. At our clinic, it is used to [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":12167,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"page-full-width","meta":{"_miragen_jsonld":"","footnotes":""},"class_list":["post-12166","page","type-page","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/miragen.clinic\/en\/wp-json\/wp\/v2\/pages\/12166","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/miragen.clinic\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/miragen.clinic\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/miragen.clinic\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/miragen.clinic\/en\/wp-json\/wp\/v2\/comments?post=12166"}],"version-history":[{"count":8,"href":"https:\/\/miragen.clinic\/en\/wp-json\/wp\/v2\/pages\/12166\/revisions"}],"predecessor-version":[{"id":13065,"href":"https:\/\/miragen.clinic\/en\/wp-json\/wp\/v2\/pages\/12166\/revisions\/13065"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/miragen.clinic\/en\/wp-json\/wp\/v2\/media\/12167"}],"wp:attachment":[{"href":"https:\/\/miragen.clinic\/en\/wp-json\/wp\/v2\/media?parent=12166"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}