{"id":1234,"date":"2018-12-05T13:45:01","date_gmt":"2018-12-05T12:45:01","guid":{"rendered":"http:\/\/192.168.1.104\/?page_id=1234"},"modified":"2019-12-07T17:00:16","modified_gmt":"2019-12-07T16:00:16","slug":"riva-1","status":"publish","type":"page","link":"http:\/\/vet-ecg.ddns.net\/index.php\/riva-1\/","title":{"rendered":"RIVA"},"content":{"rendered":"<figure id=\"attachment_1235\" aria-describedby=\"caption-attachment-1235\" style=\"width: 3786px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1235\" src=\"http:\/\/vet-ecg.ddns.net\/wp-content\/uploads\/riva-1.jpg\" alt=\"Alternance de rythme sinusal et de rythme idioventriculaire acc\u00e9l\u00e9r\u00e9 (RIVA)\" width=\"3786\" height=\"1935\" \/><figcaption id=\"caption-attachment-1235\" class=\"wp-caption-text\">Comp\u00e9tition entre 2 pacemakers (noeud sinusal et foyer ventriculaire gauche).<\/figcaption><\/figure>\n<p>Le trac\u00e9 est enregistr\u00e9 \u00e0 25 mm\/s et 2,5 mm\/mV.<\/p>\n<p>On distingue sur ce trac\u00e9, deux types de complexes QRS, les fins (hypovolt\u00e9s: 0,8 mV) et les larges, \u00e0 polarit\u00e9 n\u00e9gative.<\/p>\n<p>Les QRS d&rsquo;origine sinusale (les QRS fins et de petite amplitude) ont une morphologie habituelle.<\/p>\n<p>Leur dur\u00e9e est d&rsquo;environ 50 ms ce qui est conforme aux normes pour un chien de 40 kg.<\/p>\n<p>La fr\u00e9quence du n\u0153ud sinusal est de 140 bpm.<\/p>\n<p>Les QRS n\u00e9gatifs et larges sont issus du ventricule gauche.<br \/>\nIls ont une dur\u00e9e sup\u00e9rieure \u00e0 100 ms ce qui oriente vers un foyer ectopique situ\u00e9 dans le r\u00e9seau de Purkinje.<\/p>\n<p>Il s&rsquo;agit d&rsquo;un rythme idioventriculaire acc\u00e9l\u00e9r\u00e9 (RIVA).<\/p>\n<p>Ils sont r\u00e9guli\u00e8rement cadenc\u00e9s \u00e0 115 bpm.<\/p>\n<p>Ce trac\u00e9 montre la comp\u00e9tition entre deux pacemakers (un pacemaker sinusal et un pacemaker ventriculaire).<\/p>\n<p>Le d\u00e9bit cardiaque est conserv\u00e9 car la fr\u00e9quence du foyer ventriculaire est proche de celle du n\u0153ud sinusal.<\/p>\n<p>Ce trouble du rythme est b\u00e9nin et est g\u00e9n\u00e9ralement spontan\u00e9ment r\u00e9solutif.<\/p>\n<p>L&rsquo;\u00e9chographie ne met aucune anomalie en \u00e9vidence.<\/p>\n<p>Ce rythme s&rsquo;inscrit dans le cadre d&rsquo;une spl\u00e9nectomie apr\u00e8s la d\u00e9couverte d&rsquo;une masse spl\u00e9nique chez un berger suisse de 40 kg.<\/p>\n<p>Le RIVA a disparu\u00a0 24 heures plus tard.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Le trac\u00e9 est enregistr\u00e9 \u00e0 25 mm\/s et 2,5 mm\/mV. On distingue sur ce trac\u00e9, deux types de complexes QRS, les fins (hypovolt\u00e9s: 0,8 mV) et les larges, \u00e0 polarit\u00e9 n\u00e9gative. Les QRS d&rsquo;origine sinusale (les QRS fins et de petite amplitude) ont une morphologie habituelle. Leur dur\u00e9e est d&rsquo;environ 50 ms ce qui est &hellip; <a href=\"http:\/\/vet-ecg.ddns.net\/index.php\/riva-1\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">RIVA<\/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-1234","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>RIVA - Blog d&#039;\u00e9lectrocardiographie v\u00e9t\u00e9rinaire<\/title>\n<meta name=\"description\" content=\"Rythme idioventriculaire acc\u00e9l\u00e9r\u00e9 (RIVA) chez un berger suisse au d\u00e9cours d&#039;une spl\u00e9nectomie. 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