{"id":10878,"date":"2026-06-29T01:17:14","date_gmt":"2026-06-29T01:17:14","guid":{"rendered":"https:\/\/cardiocases.com\/?post_type=ecg_case&#038;p=10878"},"modified":"2026-07-02T11:37:28","modified_gmt":"2026-07-02T11:37:28","slug":"trace-6-1-respiratory-sinus-arhythmia","status":"publish","type":"ecg_case","link":"https:\/\/cardiocases.com\/fr\/ecg_case\/trace-6-1-respiratory-sinus-arhythmia\/","title":{"rendered":"Trace 6.1: Respiratory sinus arhythmia"},"content":{"rendered":"","protected":false},"featured_media":9719,"template":"","ecg_case_type":[255],"language_ecgcase":[258],"class_list":["post-10878","ecg_case","type-ecg_case","status-publish","has-post-thumbnail","hentry","ecg_case_type-atrial-fibrillation-atrial-flutter-atrial-tachycardia","language_ecgcase-english"],"acf":{"ecg_case_title":"Trace 6.1: Respiratory sinus arhythmia","patient_description":"17-year-old adolescent with no prior history, asymptomatic;","quiz_question":"What is(are) the abnormality(ies) present on this tracing?","quiz_answer_1":"sinus node dysfunction","quiz_answer_2":"atrial fibrillation","quiz_answer_3":"respiratory sinus arrhythmia","quiz_answer_4":"second degree atrioventricular block","quiz_answer_5":"une tachycardie atrialeatrial tachycardia","correct_answer":["C"],"ecg_image":9947,"ecg_description":"This tracing shows an irregular sinus atrial activity with successive accelerations and slowings; the remainder of the electrocardiogram is within normal ranges; probable physiological sinus arrhythmia in an adolescent patient;","ecg_info_box":"Childhood or adolescent respiratory arrhythmia results in the presence of an irregular sinus rhythm (acceleration at the onset of inspiration and slowing at the onset of expiration) with no pathological features.","commentary_ecg":"Childhood or adolescent respiratory sinus arrhythmia is one of the most common \u201carrhythmias\u201d in clinical practice. It corresponds to fluctuations in periodicity of sinus node related to reflex variations in vagal tone. These rate variations following the respiratory cycles and occurring in asymptomatic patients can be considered as physiological. The incidence of sinus arrhythmia decreases with age probably in conjunction with the decrease in carotid baroreceptor sensitivity.\r\n\r\nOn the electrocardiogram, the phasic respiratory sinus arrhythmia results in a sinus-controlled rhythm whose rate is clearly irregular.\r\n\r\nWe observe:\r\n\r\n\u2022 Identical P waves with no change in morphology;\r\n\u2022 An irregularity of the P waves with deviations of more than 160 ms between the PP intervals;\r\n\u2022 Variations in PP interval duration which are periodic and follow the respiratory cycles; an acceleration of the sinus rhythm is observed at the end of expiration (resumption of vagal tone) while a slowing of the sinus rhythm occurs at the end of inspiration and at the onset of  expiration (decrease in vagal tone); these variations disappear during apneas and decrease during exercise with the increase in heart rate;\r\n\u2022 The PR interval and the remainder of the electrocardiogram are generally normal;\r\n","ecg_info_post_answer":"<img class=\"alignnone wp-image-10879 size-large\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/06\/trace-6-1-ecg-en-1024x576.jpg\" alt=\"\" width=\"800\" height=\"450\" \/>"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Trace 6.1: Respiratory sinus arhythmia - Cardiocases<\/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:\/\/cardiocases.com\/fr\/ecg_case\/trace-6-1-respiratory-sinus-arhythmia\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Trace 6.1: Respiratory sinus arhythmia - Cardiocases\" \/>\n<meta property=\"og:url\" content=\"https:\/\/cardiocases.com\/fr\/ecg_case\/trace-6-1-respiratory-sinus-arhythmia\/\" \/>\n<meta property=\"og:site_name\" content=\"Cardiocases\" \/>\n<meta property=\"article:modified_time\" content=\"2026-07-02T11:37:28+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/03\/trace-6-1-ecg.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1\" \/>\n\t<meta property=\"og:image:height\" content=\"1\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/cardiocases.com\\\/ecg_case\\\/trace-6-1-respiratory-sinus-arhythmia\\\/\",\"url\":\"https:\\\/\\\/cardiocases.com\\\/ecg_case\\\/trace-6-1-respiratory-sinus-arhythmia\\\/\",\"name\":\"Trace 6.1: Respiratory sinus arhythmia - Cardiocases\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/cardiocases.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/cardiocases.com\\\/ecg_case\\\/trace-6-1-respiratory-sinus-arhythmia\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/cardiocases.com\\\/ecg_case\\\/trace-6-1-respiratory-sinus-arhythmia\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/cardiocases.com\\\/wp-content\\\/uploads\\\/2026\\\/03\\\/trace-6-1-ecg.png\",\"datePublished\":\"2026-06-29T01:17:14+00:00\",\"dateModified\":\"2026-07-02T11:37:28+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/cardiocases.com\\\/ecg_case\\\/trace-6-1-respiratory-sinus-arhythmia\\\/#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/cardiocases.com\\\/ecg_case\\\/trace-6-1-respiratory-sinus-arhythmia\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\\\/\\\/cardiocases.com\\\/ecg_case\\\/trace-6-1-respiratory-sinus-arhythmia\\\/#primaryimage\",\"url\":\"https:\\\/\\\/cardiocases.com\\\/wp-content\\\/uploads\\\/2026\\\/03\\\/trace-6-1-ecg.png\",\"contentUrl\":\"https:\\\/\\\/cardiocases.com\\\/wp-content\\\/uploads\\\/2026\\\/03\\\/trace-6-1-ecg.png\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/cardiocases.com\\\/ecg_case\\\/trace-6-1-respiratory-sinus-arhythmia\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/cardiocases.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Trace 6.1: Respiratory sinus arhythmia\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/cardiocases.com\\\/#website\",\"url\":\"https:\\\/\\\/cardiocases.com\\\/\",\"name\":\"Cardiocases\",\"description\":\"Real cardiac device traces, pacemaker &amp; ICD learning \u2014 built by electrophysiologists\",\"publisher\":{\"@id\":\"https:\\\/\\\/cardiocases.com\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/cardiocases.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"fr-FR\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/cardiocases.com\\\/#organization\",\"name\":\"Cardiocases\",\"url\":\"https:\\\/\\\/cardiocases.com\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\\\/\\\/cardiocases.com\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/cardiocases.com\\\/wp-content\\\/uploads\\\/2025\\\/07\\\/cardiocases_logo.png\",\"contentUrl\":\"https:\\\/\\\/cardiocases.com\\\/wp-content\\\/uploads\\\/2025\\\/07\\\/cardiocases_logo.png\",\"width\":1755,\"height\":499,\"caption\":\"Cardiocases\"},\"image\":{\"@id\":\"https:\\\/\\\/cardiocases.com\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.linkedin.com\\\/company\\\/cardiocases\\\/\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Trace 6.1: Respiratory sinus arhythmia - Cardiocases","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/cardiocases.com\/fr\/ecg_case\/trace-6-1-respiratory-sinus-arhythmia\/","og_locale":"fr_FR","og_type":"article","og_title":"Trace 6.1: Respiratory sinus arhythmia - Cardiocases","og_url":"https:\/\/cardiocases.com\/fr\/ecg_case\/trace-6-1-respiratory-sinus-arhythmia\/","og_site_name":"Cardiocases","article_modified_time":"2026-07-02T11:37:28+00:00","og_image":[{"url":"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/03\/trace-6-1-ecg.png","width":1,"height":1,"type":"image\/png"}],"twitter_card":"summary_large_image","twitter_misc":{"Dur\u00e9e de lecture estim\u00e9e":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/cardiocases.com\/ecg_case\/trace-6-1-respiratory-sinus-arhythmia\/","url":"https:\/\/cardiocases.com\/ecg_case\/trace-6-1-respiratory-sinus-arhythmia\/","name":"Trace 6.1: Respiratory sinus arhythmia - Cardiocases","isPartOf":{"@id":"https:\/\/cardiocases.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/cardiocases.com\/ecg_case\/trace-6-1-respiratory-sinus-arhythmia\/#primaryimage"},"image":{"@id":"https:\/\/cardiocases.com\/ecg_case\/trace-6-1-respiratory-sinus-arhythmia\/#primaryimage"},"thumbnailUrl":"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/03\/trace-6-1-ecg.png","datePublished":"2026-06-29T01:17:14+00:00","dateModified":"2026-07-02T11:37:28+00:00","breadcrumb":{"@id":"https:\/\/cardiocases.com\/ecg_case\/trace-6-1-respiratory-sinus-arhythmia\/#breadcrumb"},"inLanguage":"fr-FR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/cardiocases.com\/ecg_case\/trace-6-1-respiratory-sinus-arhythmia\/"]}]},{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/cardiocases.com\/ecg_case\/trace-6-1-respiratory-sinus-arhythmia\/#primaryimage","url":"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/03\/trace-6-1-ecg.png","contentUrl":"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/03\/trace-6-1-ecg.png"},{"@type":"BreadcrumbList","@id":"https:\/\/cardiocases.com\/ecg_case\/trace-6-1-respiratory-sinus-arhythmia\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/cardiocases.com\/"},{"@type":"ListItem","position":2,"name":"Trace 6.1: Respiratory sinus arhythmia"}]},{"@type":"WebSite","@id":"https:\/\/cardiocases.com\/#website","url":"https:\/\/cardiocases.com\/","name":"Cardiocases","description":"Real cardiac device traces, pacemaker &amp; ICD learning \u2014 built by electrophysiologists","publisher":{"@id":"https:\/\/cardiocases.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/cardiocases.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"fr-FR"},{"@type":"Organization","@id":"https:\/\/cardiocases.com\/#organization","name":"Cardiocases","url":"https:\/\/cardiocases.com\/","logo":{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/cardiocases.com\/#\/schema\/logo\/image\/","url":"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/07\/cardiocases_logo.png","contentUrl":"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/07\/cardiocases_logo.png","width":1755,"height":499,"caption":"Cardiocases"},"image":{"@id":"https:\/\/cardiocases.com\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.linkedin.com\/company\/cardiocases\/"]}]}},"_links":{"self":[{"href":"https:\/\/cardiocases.com\/fr\/wp-json\/wp\/v2\/ecg_case\/10878","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cardiocases.com\/fr\/wp-json\/wp\/v2\/ecg_case"}],"about":[{"href":"https:\/\/cardiocases.com\/fr\/wp-json\/wp\/v2\/types\/ecg_case"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cardiocases.com\/fr\/wp-json\/wp\/v2\/media\/9719"}],"wp:attachment":[{"href":"https:\/\/cardiocases.com\/fr\/wp-json\/wp\/v2\/media?parent=10878"}],"wp:term":[{"taxonomy":"ecg_case_type","embeddable":true,"href":"https:\/\/cardiocases.com\/fr\/wp-json\/wp\/v2\/ecg_case_type?post=10878"},{"taxonomy":"language_ecgcase","embeddable":true,"href":"https:\/\/cardiocases.com\/fr\/wp-json\/wp\/v2\/language_ecgcase?post=10878"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}