{"id":10107,"date":"2026-04-01T12:00:17","date_gmt":"2026-04-01T12:00:17","guid":{"rendered":"https:\/\/cardiocases.com\/?post_type=ecg_case&#038;p=10107"},"modified":"2026-04-09T09:40:55","modified_gmt":"2026-04-09T09:40:55","slug":"trace-3-9-bloc-de-branche-indifferencie","status":"publish","type":"ecg_case","link":"https:\/\/cardiocases.com\/fr\/ecg_case\/trace-3-9-bloc-de-branche-indifferencie\/","title":{"rendered":"Trac\u00e9 3.9: Bloc de branche indiff\u00e9renci\u00e9"},"content":{"rendered":"","protected":false},"featured_media":10106,"template":"","ecg_case_type":[252],"language_ecgcase":[259],"class_list":["post-10107","ecg_case","type-ecg_case","status-publish","has-post-thumbnail","hentry","ecg_case_type-bundle-branch-block","language_ecgcase-french"],"acf":{"ecg_case_title":"Trac\u00e9 3.9: Bloc de branche indiff\u00e9renci\u00e9","patient_description":"Homme de 74 ans, insuffisance cardiaque s\u00e9v\u00e8re sur myocardiopathie primitive","quiz_question":"Quel(s) est(sont) le(s) diagnostic(s) vrai(s) pour cet ECG?","quiz_answer_1":"hypertrophie auriculaire gauche","quiz_answer_2":"bloc de branche indiff\u00e9renci\u00e9","quiz_answer_3":"bloc de branche droit","quiz_answer_4":"bloc de branche gauche","quiz_answer_5":"h\u00e9mibloc post\u00e9rieur gauche","correct_answer":["A","B"],"ecg_image":10106,"ecg_description":"Activit\u00e9 sinusale avec hypertrophie auriculaire gauche (onde P \u00e9largie, composante n\u00e9gative large en V1); bloc indiff\u00e9renci\u00e9 (QRS large > 120 ms, sans aspect typique de bloc de branche droit ou de bloc de branche gauche);","ecg_info_box":"Le bloc indiff\u00e9renci\u00e9 correspond \u00e0 un \u00e9largissement du QRS sans aspect caract\u00e9ristique de bloc de branche droit ou gauche; il \u2018s\u2019agit donc d\u2019un diagnostic d\u2019\u00e9limination.","commentary_ecg":"Ce trac\u00e9 correspond \u00e0 un aspect de bloc indiff\u00e9renci\u00e9. Il s\u2019agit d\u2019un diagnostic d\u2019\u00e9limination en pr\u00e9sence d\u2019un QRS large (> 120 ms) mais ne pr\u00e9sentant pas les caract\u00e9ristiques d\u2019un bloc de branche droit ou d\u2019un bloc de branche gauche. Il n\u2019est donc pas possible d\u2019en d\u00e9finir un aspect caract\u00e9ristique. La physiopathologie de ce trouble de conduction est complexe mais traduit l\u2019existence d\u2019une alt\u00e9ration de la conduction intra-myocardique ventriculaire de type pari\u00e9tal. Il ne s\u2019agit donc pas \u00e0 proprement parler d\u2019un v\u00e9ritable bloc de branche mais d\u2019un trouble distal de la conduction ventriculaire. En effet, la conduction se fait normalement dans les voies de conduction nodo-hisiennes mais est ralentie de fa\u00e7on diffuse ou localis\u00e9e dans le myocarde ventriculaire. Ce type de bloc de branche est relativement rare, correspond \u00e0 des pr\u00e9sentations cliniques et \u00e9lectrophysiologiques diverses mais est plut\u00f4t de mauvais pronostic et pr\u00e9f\u00e9rentiellement observ\u00e9 chez des patients avec myocardiopathie isch\u00e9mique ou myocardiopathie hypertrophique.\r\n\r\nChez ce patient, l\u2019\u00e9lectrocardiogramme correspond \u00e0 un aspect d\u2019h\u00e9mibloc ant\u00e9rieur gauche \u201c\u00e9largi\u201d: axe gauche, aspect qR en DI, rS en DII, DIII, ondes q et rabotage onde R dans les pr\u00e9cordiales droites, onde S large en V6.\r\n","ecg_info_post_answer":"<img class=\"alignnone wp-image-10312 size-large\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/04\/page-135-1024x619.png\" alt=\"\" width=\"800\" height=\"484\" \/>"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Trac\u00e9 3.9: Bloc de branche indiff\u00e9renci\u00e9 - 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-3-9-bloc-de-branche-indifferencie\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Trac\u00e9 3.9: Bloc de branche indiff\u00e9renci\u00e9 - Cardiocases\" \/>\n<meta property=\"og:url\" content=\"https:\/\/cardiocases.com\/fr\/ecg_case\/trace-3-9-bloc-de-branche-indifferencie\/\" \/>\n<meta property=\"og:site_name\" content=\"Cardiocases\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-09T09:40:55+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/03\/trace-3-9-ecg-7-scaled-e1775721537937-1024x615.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1024\" \/>\n\t<meta property=\"og:image:height\" content=\"615\" \/>\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-3-9-bloc-de-branche-indifferencie\/\",\"url\":\"https:\/\/cardiocases.com\/ecg_case\/trace-3-9-bloc-de-branche-indifferencie\/\",\"name\":\"Trac\u00e9 3.9: Bloc de branche indiff\u00e9renci\u00e9 - Cardiocases\",\"isPartOf\":{\"@id\":\"https:\/\/cardiocases.com\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/cardiocases.com\/ecg_case\/trace-3-9-bloc-de-branche-indifferencie\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/cardiocases.com\/ecg_case\/trace-3-9-bloc-de-branche-indifferencie\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/03\/trace-3-9-ecg-7-scaled-e1775721537937.png\",\"datePublished\":\"2026-04-01T12:00:17+00:00\",\"dateModified\":\"2026-04-09T09:40:55+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/cardiocases.com\/ecg_case\/trace-3-9-bloc-de-branche-indifferencie\/#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/cardiocases.com\/ecg_case\/trace-3-9-bloc-de-branche-indifferencie\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/cardiocases.com\/ecg_case\/trace-3-9-bloc-de-branche-indifferencie\/#primaryimage\",\"url\":\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/03\/trace-3-9-ecg-7-scaled-e1775721537937.png\",\"contentUrl\":\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/03\/trace-3-9-ecg-7-scaled-e1775721537937.png\",\"width\":2556,\"height\":1536},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/cardiocases.com\/ecg_case\/trace-3-9-bloc-de-branche-indifferencie\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/cardiocases.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Trac\u00e9 3.9: Bloc de branche indiff\u00e9renci\u00e9\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/cardiocases.com\/#website\",\"url\":\"https:\/\/cardiocases.com\/\",\"name\":\"Cardiocases\",\"description\":\"Real cardiac device traces, pacemaker &amp; 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