{"id":1437,"date":"2019-03-27T11:59:32","date_gmt":"2019-03-27T10:59:32","guid":{"rendered":"http:\/\/192.168.1.104\/?page_id=1437"},"modified":"2019-10-20T10:35:42","modified_gmt":"2019-10-20T08:35:42","slug":"tj-1","status":"publish","type":"page","link":"http:\/\/vet-ecg.ddns.net\/index.php\/tj-1\/","title":{"rendered":"Tachycardie jonctionnelle (1)"},"content":{"rendered":"\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"2250\" height=\"1992\" src=\"http:\/\/vet-ecg.ddns.net\/wp-content\/uploads\/TJ-2.jpg\" alt=\"\" class=\"wp-image-1438\"\/><figcaption>Tachycardie jonctionnelle ou syndrome de PR court<\/figcaption><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>La fr\u00e9quence cardiaque sur ce trac\u00e9 varie de 170 \u00e0 240 bpm.  L&rsquo;amplitude des QRS est hypovolt\u00e9e et on remarque un sous-d\u00e9calage du segment ST. Par ailleurs, il existe des ondes S en D2, D3 et AVF.<\/p>\n\n\n<p>Classiquement, l&rsquo;intervalle PR (ou PQ) est compris entre 60 et 130 ms en fonction (inverse) de la fr\u00e9quence. Ici il est de 45 ms. L&rsquo;origine atriale est improbable car ce temps de propagation de l&rsquo;influx est trop court.<\/p>\n<p>Le chien est asymptomatique. Sur ce trac\u00e9 on ne voit pas de signes de pr\u00e9excitation (absence d&#8217;emp\u00e2tement de la branche ascendante de l&rsquo;onde R par une onde delta).<\/p>\n<p>Par ailleurs, on ne dispose pas de trac\u00e9 hors tachycardie. On peut donc pas savoir si une pr\u00e9excitation est pr\u00e9sente sur le rythme de base, ni si il existe une conduction d\u00e9cr\u00e9mentielle.<\/p>\n<p>Il est donc impossible de savoir si un faisceau de conduction accessoire est pr\u00e9sent, ni si une conduction d\u00e9cr\u00e9mentielle prot\u00e8ge l&rsquo;animal de troubles du rythme plus s\u00e9v\u00e8res (fibrillation atriale tr\u00e8s rapide ou fibrillation ventriculaire).<\/p>\n<p>\u00a0<\/p>","protected":false},"excerpt":{"rendered":"<p>La fr\u00e9quence cardiaque sur ce trac\u00e9 varie de 170 \u00e0 240 bpm. L&rsquo;amplitude des QRS est hypovolt\u00e9e et on remarque un sous-d\u00e9calage du segment ST. Par ailleurs, il existe des ondes S en D2, D3 et AVF. Classiquement, l&rsquo;intervalle PR (ou PQ) est compris entre 60 et 130 ms en fonction (inverse) de la fr\u00e9quence. &hellip; <a href=\"http:\/\/vet-ecg.ddns.net\/index.php\/tj-1\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Tachycardie jonctionnelle (1)<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1437","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Tachycardie jonctionnelle (1) - Blog d&#039;\u00e9lectrocardiographie v\u00e9t\u00e9rinaire<\/title>\n<meta name=\"description\" content=\"Tachycardie jonctionnelle - Intervalle PR court et absence de signes de pr\u00e9excitation. 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