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.elementor-element.elementor-element-45da14a{color:var( --e-global-color-ca4f23e );}.elementor-252 .elementor-element.elementor-element-0585c76{color:var( --e-global-color-ca4f23e );}.elementor-252 .elementor-element.elementor-element-4ae4b2a{color:var( --e-global-color-ca4f23e );}.elementor-252 .elementor-element.elementor-element-f816313{color:var( --e-global-color-ca4f23e );}</style>{"id":252,"date":"2025-07-10T07:57:36","date_gmt":"2025-07-10T07:57:36","guid":{"rendered":"https:\/\/cardiocases.com\/?page_id=252"},"modified":"2026-09-27T14:21:44","modified_gmt":"2026-09-27T14:21:44","slug":"algorithmes-favorisant-la-conduction-av","status":"publish","type":"page","link":"https:\/\/cardiocases.com\/fr\/pacing-defibrillation\/basic-concepts\/pacemaker\/algorithms-favoring-av-conduction\/","title":{"rendered":"Modes sp\u00e9cifiques de stimulation"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"252\" class=\"elementor elementor-252\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-44e23e7 e-con-full e-flex e-con e-parent\" data-id=\"44e23e7\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-26b203b elementor-widget elementor-widget-heading\" data-id=\"26b203b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Algorithms favoring AV conduction<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-22f48ef e-con-full e-flex e-con e-parent\" data-id=\"22f48ef\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-01d1dc8 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8z\\&quot;&gt;&lt;\\\/path&gt;&lt;\\\/svg&gt;&quot;},&quot;minimize_box&quot;:&quot;yes&quot;,&quot;minimized_on&quot;:&quot;tablet&quot;,&quot;hierarchical_view&quot;:&quot;yes&quot;,&quot;min_height&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"table-of-contents.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__header\">\n\t\t\t\t\t\t<h4 class=\"elementor-toc__header-title\">\n\t\t\t\tContent\t\t\t<\/h4>\n\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--expand\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__01d1dc8\" aria-expanded=\"true\" aria-label=\"Ouvrir la table des mati\u00e8res\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/div>\n\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--collapse\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__01d1dc8\" aria-expanded=\"true\" aria-label=\"Fermer la table des mati\u00e8res\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<div id=\"elementor-toc__01d1dc8\" class=\"elementor-toc__body\">\n\t\t\t<div class=\"elementor-toc__spinner-container\">\n\t\t\t\t<svg class=\"elementor-toc__spinner eicon-animation-spin e-font-icon-svg e-eicon-loading\" aria-hidden=\"true\" viewBox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M500 975V858C696 858 858 696 858 500S696 142 500 142 142 304 142 500H25C25 237 238 25 500 25S975 237 975 500 763 975 500 975Z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-aed6935 e-con-full e-flex e-con e-child\" data-id=\"aed6935\" data-element_type=\"container\" data-e-type=\"container\" data-no-translation=\"\">\n\t\t\t\t<div class=\"elementor-element elementor-element-25ed5b5 elementor-widget elementor-widget-heading\" data-id=\"25ed5b5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Pourquoi \u00e9viter la stimulation ventriculaire droite inutile ?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0ef8a7c elementor-widget elementor-widget-text-editor\" data-id=\"0ef8a7c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Il existe une litt\u00e9rature riche d\u00e9montrant l\u2019effet d\u00e9l\u00e9t\u00e8re d\u2019une stimulation ventriculaire droite prolong\u00e9e sur la fonction ventriculaire gauche, avec remodelage ventriculaire, augmentation des volumes ventriculaires et augmentation du risque de survenue d\u2019une arythmie atriale. De m\u00eame, toute r\u00e9duction de la stimulation ventriculaire inutile permet de diminuer la consommation \u00e9nerg\u00e9tique, d\u2019allonger la dur\u00e9e de vie du stimulateur et peut r\u00e9duire la fr\u00e9quence des remplacements de bo\u00eetier. Diff\u00e9rents modes ont \u00e9t\u00e9 propos\u00e9s par les constructeurs pour r\u00e9duire le pourcentage de stimulation ventriculaire sans induire de sympt\u00f4mes ni compromettre la s\u00e9curit\u00e9 du patient lors de la survenue d\u2019un trouble de conduction auriculoventriculaire. L\u2019indication privil\u00e9gi\u00e9e de ce type de mode est donc l\u2019existence d\u2019une dysfonction sinusale avec conduction auriculoventriculaire pr\u00e9serv\u00e9e ou alt\u00e9r\u00e9e de fa\u00e7on paroxystique.<\/p><ul><li>L\u2019analyse du pourcentage de stimulation ventriculaire est un temps essentiel de l\u2019interrogation d\u2019un stimulateur chez un patient implant\u00e9 pour dysfonction sinusale, avec pour objectif de r\u00e9duire au maximum toute stimulation ventriculaire inutile.<\/li><li>La mise en \u00e9vidence d\u2019un pourcentage \u00e9lev\u00e9 de stimulation ventriculaire droite chez un patient implant\u00e9 pour dysfonction sinusale avec conduction AV pr\u00e9serv\u00e9e doit faire discuter l\u2019utilisation d\u2019un algorithme ou d\u2019un mode sp\u00e9cifique favorisant la conduction spontan\u00e9e.<\/li><li>La programmation de ce type de mode n\u2019est pas justifi\u00e9e chez les patients pr\u00e9sentant un bloc auriculoventriculaire de haut grade.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-04e21dd elementor-widget elementor-widget-heading\" data-id=\"04e21dd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Trois fa\u00e7ons de r\u00e9duire la stimulation ventriculaire<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4fefc95 elementor-widget elementor-widget-text-editor\" data-id=\"4fefc95\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul><li><strong>La programmation au long cours de d\u00e9lais AV prolong\u00e9s<\/strong> peut r\u00e9duire le pourcentage de stimulation ventriculaire, mais elle est associ\u00e9e \u00e0 un remplissage ventriculaire sous-optimal, augmente le risque de TRE et peut favoriser la survenue d\u2019un bloc 2:1 \u00e0 l\u2019effort.<\/li><li><strong>L\u2019hyst\u00e9r\u00e9sis du d\u00e9lai AV<\/strong> correspond \u00e0 un allongement intermittent du d\u00e9lai AV pour favoriser la conduction spontan\u00e9e. Si une onde R est d\u00e9tect\u00e9e, le d\u00e9lai AV reste allong\u00e9 ; sinon, une stimulation ventriculaire est d\u00e9livr\u00e9e en fin de d\u00e9lai AV allong\u00e9 (absence d\u2019onde P bloqu\u00e9e), puis le stimulateur revient au d\u00e9lai AV programm\u00e9. Ant\u00e9rieur aux modes sp\u00e9cifiques, ce type d\u2019algorithme est toujours propos\u00e9 par tous les constructeurs ; c\u2019est le principe du VIP d\u2019Abbott.<\/li><li><strong>Des modes sp\u00e9cifiques<\/strong> permettent la commutation entre mode AAI\/ADI et mode DDD : MVP (Medtronic), RYTHMIQ (Boston Scientific), SafeR (MicroPort) et Vp-Suppression (Biotronik). Ils sont simples \u00e0 programmer ; leur philosophie globale est identique, mais il existe des diff\u00e9rences de fonctionnement qu\u2019il faut parfaitement conna\u00eetre.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-193b958 elementor-widget elementor-widget-heading\" data-id=\"193b958\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Principe commun : fonctionnement AAI\/ADI avec commutation en DDD<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f800340 elementor-widget elementor-widget-text-editor\" data-id=\"f800340\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Dans ces modes sp\u00e9cifiques, le stimulateur fonctionne en mode AAI(R) avec analyse de la d\u00e9tection ventriculaire (mode ADI). Tous proposent :<\/p><ul><li>une stimulation AAI (mode ADI) tant que la conduction AV est pr\u00e9serv\u00e9e ;<\/li><li>une commutation automatique vers le mode DDD(R) quand la conduction AV s\u2019alt\u00e8re, selon des crit\u00e8res propres \u00e0 chaque constructeur (activit\u00e9s atriales bloqu\u00e9es, cycles ventriculaires lents, intervalle PR allong\u00e9 ou pause ventriculaire) ; le MVP et le RYTHMIQ d\u00e9livrent en outre une stimulation ventriculaire de secours avant de commuter ;<\/li><li>une recherche p\u00e9riodique de la conduction spontan\u00e9e en mode DDD, avec retour automatique en AAI\/ADI quand la conduction AV redevient normale.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1b90802 elementor-widget elementor-widget-text-editor\" data-id=\"1b90802\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div style=\"background:#eef5f9;border-left:4px solid #173C58;padding:12px 16px;border-radius:4px;margin:4px 0 18px\"><strong>Des ondes P bloqu\u00e9es peuvent \u00eatre normales.<\/strong> L\u2019existence d\u2019une ou deux ondes P bloqu\u00e9es peut correspondre \u00e0 un fonctionnement normal quand ce type de mode est programm\u00e9. Il n\u2019est pas rare d\u2019\u00eatre appel\u00e9 par une infirmi\u00e8re qui interpr\u00e8te un tel trac\u00e9 comme un dysfonctionnement du stimulateur : il est donc essentiel de conna\u00eetre les principes de fonctionnement de ces modes.<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cde3103 elementor-widget elementor-widget-heading\" data-id=\"cde3103\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Pi\u00e8ges classiques<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-afd7ea3 elementor-widget elementor-widget-heading\" data-id=\"afd7ea3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Ondes P bloqu\u00e9es et pauses ventriculaires<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-06cf7a7 elementor-widget elementor-widget-text-editor\" data-id=\"06cf7a7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Quand la conduction AV s\u2019alt\u00e8re en fonctionnement AAI\/ADI, l\u2019activit\u00e9 atriale bloqu\u00e9e est suivie d\u2019une pause ventriculaire jusqu\u2019\u00e0 la stimulation de secours ou la commutation en DDD. Avec la premi\u00e8re version du MVP, la pause maximale correspond \u00e0 environ le double de l\u2019intervalle de la fr\u00e9quence minimale (pr\u00e8s de 2 secondes \u00e0 60 battements\/minute, 4 secondes \u00e0 30 battements\/minute). Cette pause peut \u00eatre symptomatique et favoriser une arythmie ventriculaire (s\u00e9quence cycle long \u2013 cycle court) ; il est donc pr\u00e9f\u00e9rable de programmer une fr\u00e9quence minimale d\u2019au moins 50 battements\/minute. Pour r\u00e9duire la pause, la nouvelle version du MVP stimule l\u2019oreillette 420 \u00e0 600 ms apr\u00e8s l\u2019activit\u00e9 atriale bloqu\u00e9e, puis le ventricule 80 ms plus tard.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2c8f542 elementor-widget elementor-widget-heading\" data-id=\"2c8f542\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Intervalle PR long<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e5b2e34 elementor-widget elementor-widget-text-editor\" data-id=\"e5b2e34\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Un intervalle PR long avec conduction 1:1 ne s\u2019accompagne d\u2019aucune onde P bloqu\u00e9e : la premi\u00e8re version du MVP ne commutait donc jamais vers le mode DDD, m\u00eame chez les patients symptomatiques \u00e0 l\u2019effort. La nouvelle version du MVP, le SafeR et le Vp-Suppression peuvent commuter en DDD sur un intervalle PR\/AR allong\u00e9 (voir tableau) ; sur le MVP, cette fonction est sur Off en nominal et doit probablement \u00eatre r\u00e9serv\u00e9e aux patients symptomatiques \u00e0 l\u2019effort. Une programmation en DDD(R) peut \u00eatre pr\u00e9f\u00e9rable en cas de BAV du premier degr\u00e9 symptomatique, en particulier si le PR reste long \u00e0 l\u2019effort.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a4bfe3a elementor-widget elementor-widget-heading\" data-id=\"a4bfe3a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">TRE et bloc 2:1 lors des recherches par allongement du d\u00e9lai AV<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-11cac0e elementor-widget elementor-widget-text-editor\" data-id=\"11cac0e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Quand la recherche de conduction spontan\u00e9e repose sur un allongement du d\u00e9lai AV (VIP, Recherche AV+, Vp-Suppression), il ne peut pas y avoir d\u2019onde P bloqu\u00e9e puisqu\u2019une stimulation ventriculaire est d\u00e9livr\u00e9e en fin de d\u00e9lai AV allong\u00e9. En revanche, l\u2019allongement du d\u00e9lai AV favorise la conduction r\u00e9trograde et le d\u00e9marrage d\u2019une TRE, et allonge la p\u00e9riode r\u00e9fractaire atriale totale (d\u00e9lai AV + PRAPV), d\u2019o\u00f9 un risque de bloc 2:1 \u00e0 l\u2019effort ; \u00e0 l\u2019inverse, le risque de TRE est nul en mode AAI avec VVI de secours. Chez les patients avec conduction ant\u00e9rograde alt\u00e9r\u00e9e mais conduction r\u00e9trograde pr\u00e9serv\u00e9e, il est pr\u00e9f\u00e9rable de ne pas programmer ces recherches, ou au minimum de v\u00e9rifier que la PRAPV est plus longue que le temps de conduction r\u00e9trograde ; en cas de BAV complet permanent, le plus simple est de ne pas programmer l\u2019algorithme. Un d\u00e9lai AV long favorise \u00e9galement la survenue d\u2019une RNRVAS (repetitive non-reentrant ventriculoatrial synchrony).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-17207a0 elementor-widget elementor-widget-heading\" data-id=\"17207a0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Extrasystoles et d\u00e9tection : commutations inappropri\u00e9es<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bd05974 elementor-widget elementor-widget-text-editor\" data-id=\"bd05974\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Les commutations inappropri\u00e9es vers le mode DDD sont relativement fr\u00e9quentes et augmentent le pourcentage de stimulation ventriculaire. Les causes fr\u00e9quentes sont la pause compensatrice suivant une ESV, les ESA bloqu\u00e9es ou les salves atriales, les ESV tardives tombant dans le blanking ventriculaire ou la fen\u00eatre de bruit post-stimulation atriale, et un rythme jonctionnel actif donnant un pseudo-aspect de PR long. Une d\u00e9tection correcte et une capture atriale effective sont indispensables : une sous-d\u00e9tection ventriculaire entra\u00eene une stimulation de secours puis une commutation inappropri\u00e9e. Les stimulateurs MicroPort et Boston Scientific enregistrent un EGM lors de la commutation, ce qui permet de v\u00e9rifier le diagnostic.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-36d714c elementor-widget elementor-widget-heading\" data-id=\"36d714c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Comparaison des cinq algorithmes<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-087e153 elementor-widget elementor-widget-text-editor\" data-id=\"087e153\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div style=\"overflow-x:auto;margin:0 0 16px\"><table style=\"border-collapse:collapse;width:100%;min-width:520px;font-size:15px\"><thead><tr><th style=\"border:1px solid #d6dde3;padding:7px 9px;text-align:left;vertical-align:top;background:#eef3f7;color:#173C58\">Algorithme (constructeur)<\/th><th style=\"border:1px solid #d6dde3;padding:7px 9px;text-align:left;vertical-align:top;background:#eef3f7;color:#173C58\">Principe<\/th><th style=\"border:1px solid #d6dde3;padding:7px 9px;text-align:left;vertical-align:top;background:#eef3f7;color:#173C58\">Commutation vers DDD<\/th><th style=\"border:1px solid #d6dde3;padding:7px 9px;text-align:left;vertical-align:top;background:#eef3f7;color:#173C58\">Retour \u00e0 la conduction spontan\u00e9e<\/th><th style=\"border:1px solid #d6dde3;padding:7px 9px;text-align:left;vertical-align:top;background:#eef3f7;color:#173C58\">Principal pi\u00e8ge<\/th><\/tr><\/thead><tbody><tr><td style=\"border:1px solid #d6dde3;padding:7px 9px;text-align:left;vertical-align:top\">MVP (Medtronic)<\/td><td style=\"border:1px solid #d6dde3;padding:7px 9px;text-align:left;vertical-align:top\">AAI(R) \u2194 DDD(R) : stimulation AAI avec analyse de la d\u00e9tection ventriculaire (ADI). Une onde P bloqu\u00e9e isol\u00e9e est tol\u00e9r\u00e9e (jamais deux cons\u00e9cutives) ; sur le cycle suivant, stimulation ventriculaire de secours 80 ms apr\u00e8s le moment pr\u00e9vu de la stimulation atriale (signature).<\/td><td style=\"border:1px solid #d6dde3;padding:7px 9px;text-align:left;vertical-align:top\">Absence de d\u00e9tection ventriculaire sur 2 des 4 intervalles A-A pr\u00e9c\u00e9dents. Nouvelle version : \u00e9galement si l\u2019intervalle PR\/AR moyen d\u00e9passe une valeur limite programmable (Off en nominal).<\/td><td style=\"border:1px solid #d6dde3;padding:7px 9px;text-align:left;vertical-align:top\">Recherche (un cycle en ADI) 1 min apr\u00e8s la commutation ; apr\u00e8s chaque \u00e9chec, le d\u00e9lai est doubl\u00e9 (2, 4, 8\u2026 min, jusqu\u2019\u00e0 16 h).<\/td><td style=\"border:1px solid #d6dde3;padding:7px 9px;text-align:left;vertical-align:top\">Premi\u00e8re version : pause jusqu\u2019\u00e0 environ 2 fois l\u2019intervalle de la fr\u00e9quence minimale, et pas de commutation sur PR long. Programmer une fr\u00e9quence minimale \u2265 50 bpm.<\/td><\/tr><tr><td style=\"border:1px solid #d6dde3;padding:7px 9px;text-align:left;vertical-align:top\">RYTHMIQ (Boston Scientific)<\/td><td style=\"border:1px solid #d6dde3;padding:7px 9px;text-align:left;vertical-align:top\">AAI(R) avec stimulation VVI de secours 15 bpm sous la fr\u00e9quence minimale (entre 30 et 60 bpm). Off en nominal.<\/td><td style=\"border:1px solid #d6dde3;padding:7px 9px;text-align:left;vertical-align:top\">3 cycles ventriculaires lents sur une fen\u00eatre roulante de 11 (ventricule stimul\u00e9, ou d\u00e9tect\u00e9 plus de 150 ms au-del\u00e0 de l\u2019intervalle de la fr\u00e9quence minimale ou asservie) ; les ondes P bloqu\u00e9es ne sont pas d\u00e9compt\u00e9es.<\/td><td style=\"border:1px solid #d6dde3;padding:7px 9px;text-align:left;vertical-align:top\">Recherche AV+ (hyst\u00e9r\u00e9sis du d\u00e9lai AV tous les 32 \u00e0 1024 cycles) : retour en AAI(R) avec VVI de secours apr\u00e8s \u2265 25 cycles VS-Hy. Si la Recherche AV+ est sur Off, le stimulateur reste en DDD(R).<\/td><td style=\"border:1px solid #d6dde3;padding:7px 9px;text-align:left;vertical-align:top\">Commutations inappropri\u00e9es sur ESV\/ESA et ESV tardives dans le blanking ou la fen\u00eatre de bruit post-stimulation atriale ; TRE et bloc 2:1 pendant la Recherche AV+.<\/td><\/tr><tr><td style=\"border:1px solid #d6dde3;padding:7px 9px;text-align:left;vertical-align:top\">SafeR (MicroPort)<\/td><td style=\"border:1px solid #d6dde3;padding:7px 9px;text-align:left;vertical-align:top\">Mode ADI ; un crit\u00e8re de commutation pour chaque degr\u00e9 de BAV, plus un crit\u00e8re de pause.<\/td><td style=\"border:1px solid #d6dde3;padding:7px 9px;text-align:left;vertical-align:top\">BAV III : 2 activit\u00e9s atriales cons\u00e9cutives bloqu\u00e9es ; BAV II : 3 non cons\u00e9cutives sur les 12 derniers cycles ; BAV I : PR\/AR au-del\u00e0 de la valeur programm\u00e9e sur 6 cycles cons\u00e9cutifs ; pause &gt; 2, 3 ou 4 s.<\/td><td style=\"border:1px solid #d6dde3;padding:7px 9px;text-align:left;vertical-align:top\">Apr\u00e8s 12 ventricules spontan\u00e9s cons\u00e9cutifs, ou automatiquement tous les 100 cycles ventriculaires stimul\u00e9s ; en cas de BAV fr\u00e9quents, maintien en DDD jusqu\u2019au lendemain 8 h.<\/td><td style=\"border:1px solid #d6dde3;padding:7px 9px;text-align:left;vertical-align:top\">Ondes P bloqu\u00e9es \u00e0 chaque retour en ADI ; faux BAV I (rythme jonctionnel), faux BAV II (ESA, salves atriales) ou fausse pause (ESV, surtout avec le r\u00e9glage \u00e0 2 s).<\/td><\/tr><tr><td style=\"border:1px solid #d6dde3;padding:7px 9px;text-align:left;vertical-align:top\">VIP (Abbott)<\/td><td style=\"border:1px solid #d6dde3;padding:7px 9px;text-align:left;vertical-align:top\">Pas de mode sp\u00e9cifique : hyst\u00e9r\u00e9sis du d\u00e9lai AV. Le d\u00e9lai AV est allong\u00e9 de 50 \u00e0 200 ms (total \u2264 450 ms) sur 1 \u00e0 3 cycles, toutes les 30 s \u00e0 30 min ; stimulation ventriculaire en fin de d\u00e9lai AV allong\u00e9, donc aucune onde P bloqu\u00e9e.<\/td><td style=\"border:1px solid #d6dde3;padding:7px 9px;text-align:left;vertical-align:top\">Aucune (DDD permanent) ; retour au d\u00e9lai AV programm\u00e9 apr\u00e8s le nombre programm\u00e9 de cycles stimul\u00e9s cons\u00e9cutifs. Suspendu si la fr\u00e9quence est \u2265 110 bpm.<\/td><td style=\"border:1px solid #d6dde3;padding:7px 9px;text-align:left;vertical-align:top\">Le VIP est activ\u00e9 quand une onde R est d\u00e9tect\u00e9e pendant une recherche, ou apr\u00e8s 3 ondes R cons\u00e9cutives d\u00e9tect\u00e9es en dehors d\u2019une recherche.<\/td><td style=\"border:1px solid #d6dde3;padding:7px 9px;text-align:left;vertical-align:top\">Risque accru de TRE : \u00e0 \u00e9viter si la conduction ant\u00e9rograde est alt\u00e9r\u00e9e et la conduction r\u00e9trograde pr\u00e9serv\u00e9e.<\/td><\/tr><tr><td style=\"border:1px solid #d6dde3;padding:7px 9px;text-align:left;vertical-align:top\">Vp-Suppression (Biotronik)<\/td><td style=\"border:1px solid #d6dde3;padding:7px 9px;text-align:left;vertical-align:top\">Mode AAI-DDD : stimulation ADI avec analyse permanente de la conduction AV.<\/td><td style=\"border:1px solid #d6dde3;padding:7px 9px;text-align:left;vertical-align:top\">BAV I : PR\/AR &gt; 450 ms sur 2 cycles ; BAV II : X activit\u00e9s atriales bloqu\u00e9es sur 8 (3 en nominal, programmable de 1 \u00e0 4) ; BAV III : 2 cons\u00e9cutives bloqu\u00e9es ; pause &gt; 2 s.<\/td><td style=\"border:1px solid #d6dde3;padding:7px 9px;text-align:left;vertical-align:top\">Recherche apr\u00e8s 30 s, puis 1, 2, 4\u2026 128 min, jusqu\u2019\u00e0 20 h : d\u00e9lai AV \u00e0 450 ms sur 8 cycles ; retour en ADI si 6 ventricules cons\u00e9cutifs (programmable) sont d\u00e9tect\u00e9s.<\/td><td style=\"border:1px solid #d6dde3;padding:7px 9px;text-align:left;vertical-align:top\">Pas d\u2019onde P bloqu\u00e9e pendant la recherche, mais risque de TRE et de bloc 2:1 \u00e0 l\u2019effort ; pas d\u2019EGM enregistr\u00e9 lors de la commutation.<\/td><\/tr><\/tbody><\/table><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-795708e elementor-widget elementor-widget-heading\" data-id=\"795708e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Trac\u00e9s comment\u00e9s<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-30a49b4 elementor-widget elementor-widget-heading\" data-id=\"30a49b4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">MVP : stimulations atriales bloqu\u00e9es et commutation en DDD<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2db2eef elementor-widget elementor-widget-image\" data-id=\"2db2eef\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/07\/pm-algorithms-av-conduction-book-fig1-fr.webp\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"Algorithms favoring AV conduction \u2013 book tracing 1 (FR)\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MTI2MzMsInVybCI6Imh0dHBzOlwvXC9jYXJkaW9jYXNlcy5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjVcLzA3XC9wbS1hbGdvcml0aG1zLWF2LWNvbmR1Y3Rpb24tYm9vay1maWcxLWZyLndlYnAifQ%3D%3D\">\n\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1342\" height=\"800\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/07\/pm-algorithms-av-conduction-book-fig1-fr.webp\" class=\"attachment-full size-full wp-image-12633\" alt=\"Premi\u00e8re version du MVP en BAV complet (stimulateur Advisa, Medtronic), ECG 12 d\u00e9rivations. Apr\u00e8s programmation du MVP, une stimulation atriale n\u2019est pas conduite ; sur le cycle s\u2026\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/07\/pm-algorithms-av-conduction-book-fig1-fr.webp 1342w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/07\/pm-algorithms-av-conduction-book-fig1-fr-300x179.webp 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/07\/pm-algorithms-av-conduction-book-fig1-fr-1024x610.webp 1024w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/07\/pm-algorithms-av-conduction-book-fig1-fr-768x458.webp 768w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/07\/pm-algorithms-av-conduction-book-fig1-fr-18x12.webp 18w\" sizes=\"(max-width: 1342px) 100vw, 1342px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-edcb64d elementor-widget elementor-widget-text-editor\" data-id=\"edcb64d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div style=\"background:#f1f5f8;border-left:4px solid #7DA5B9;padding:9px 13px;margin:2px 0 4px;font-size:14px;line-height:1.55;border-radius:0 4px 4px 0\"><strong>Figure \u2013<\/strong> Premi\u00e8re version du MVP en BAV complet (stimulateur Advisa, Medtronic), ECG 12 d\u00e9rivations. Apr\u00e8s programmation du MVP, une stimulation atriale n\u2019est pas conduite ; sur le cycle suivant, la stimulation atriale est suivie d\u2019une stimulation ventriculaire avec un d\u00e9lai AV court de 80 ms, signature de l\u2019algorithme. Apr\u00e8s une seconde s\u00e9quence identique (absence de d\u00e9tection ventriculaire sur 2 des 4 intervalles atriaux pr\u00e9c\u00e9dents), le stimulateur commute vers le mode DDD.<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-960832f elementor-widget elementor-widget-heading\" data-id=\"960832f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">RYTHMIQ : stimulation VVI de secours et commutation sur cycles ventriculaires lents<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-dd95c56 elementor-widget elementor-widget-image\" data-id=\"dd95c56\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/07\/pm-algorithms-av-conduction-book-fig2-fr.webp\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"Algorithms favoring AV conduction \u2013 book tracing 2 (FR)\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MTI2MzUsInVybCI6Imh0dHBzOlwvXC9jYXJkaW9jYXNlcy5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjVcLzA3XC9wbS1hbGdvcml0aG1zLWF2LWNvbmR1Y3Rpb24tYm9vay1maWcyLWZyLndlYnAifQ%3D%3D\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1335\" height=\"512\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/07\/pm-algorithms-av-conduction-book-fig2-fr.webp\" class=\"attachment-full size-full wp-image-12635\" alt=\"RYTHMIQ et BAV paroxystique (stimulateur Vitalio, Boston Scientific ; fr\u00e9quence minimale 60 battements\/minute). Les ondes P bloqu\u00e9es sont suivies d\u2019une stimulation VVI de secours \u2026\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/07\/pm-algorithms-av-conduction-book-fig2-fr.webp 1335w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/07\/pm-algorithms-av-conduction-book-fig2-fr-300x115.webp 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/07\/pm-algorithms-av-conduction-book-fig2-fr-1024x393.webp 1024w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/07\/pm-algorithms-av-conduction-book-fig2-fr-768x295.webp 768w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/07\/pm-algorithms-av-conduction-book-fig2-fr-18x7.webp 18w\" sizes=\"(max-width: 1335px) 100vw, 1335px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1f1a94b elementor-widget elementor-widget-text-editor\" data-id=\"1f1a94b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div style=\"background:#f1f5f8;border-left:4px solid #7DA5B9;padding:9px 13px;margin:2px 0 4px;font-size:14px;line-height:1.55;border-radius:0 4px 4px 0\"><strong>Figure \u2013<\/strong> RYTHMIQ et BAV paroxystique (stimulateur Vitalio, Boston Scientific ; fr\u00e9quence minimale 60 battements\/minute). Les ondes P bloqu\u00e9es sont suivies d\u2019une stimulation VVI de secours \u00e0 45 battements\/minute (1333 ms), 15 battements\/minute sous la fr\u00e9quence minimale ; un intervalle d\u00e9tect\u00e9 de 1170 ms (170 ms de plus que 1000 ms) compte aussi comme lent. Apr\u00e8s 3 cycles lents sur les 11 derniers, le stimulateur commute vers le mode DDD : ce sont les cycles ventriculaires lents, et non les ondes P bloqu\u00e9es, qui d\u00e9clenchent la commutation.<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-501dfde elementor-widget elementor-widget-heading\" data-id=\"501dfde\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">SafeR : retour automatique en ADI et nouvelle commutation en DDD<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d70a7e0 elementor-widget elementor-widget-image\" data-id=\"d70a7e0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/07\/pm-algorithms-av-conduction-book-fig3-fr.webp\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"Algorithms favoring AV conduction \u2013 book tracing 3 (FR)\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MTI2MzcsInVybCI6Imh0dHBzOlwvXC9jYXJkaW9jYXNlcy5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjVcLzA3XC9wbS1hbGdvcml0aG1zLWF2LWNvbmR1Y3Rpb24tYm9vay1maWczLWZyLndlYnAifQ%3D%3D\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1327\" height=\"775\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/07\/pm-algorithms-av-conduction-book-fig3-fr.webp\" class=\"attachment-full size-full wp-image-12637\" alt=\"SafeR en cas de dysfonction sinusale avec BAV paroxystique (stimulateur Reply DR, MicroPort). En mode DDD, le stimulateur commute automatiquement vers le mode ADI apr\u00e8s 100 cycles\u2026\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/07\/pm-algorithms-av-conduction-book-fig3-fr.webp 1327w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/07\/pm-algorithms-av-conduction-book-fig3-fr-300x175.webp 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/07\/pm-algorithms-av-conduction-book-fig3-fr-1024x598.webp 1024w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/07\/pm-algorithms-av-conduction-book-fig3-fr-768x449.webp 768w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/07\/pm-algorithms-av-conduction-book-fig3-fr-18x12.webp 18w\" sizes=\"(max-width: 1327px) 100vw, 1327px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c31e172 elementor-widget elementor-widget-text-editor\" data-id=\"c31e172\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div style=\"background:#f1f5f8;border-left:4px solid #7DA5B9;padding:9px 13px;margin:2px 0 4px;font-size:14px;line-height:1.55;border-radius:0 4px 4px 0\"><strong>Figure \u2013<\/strong> SafeR en cas de dysfonction sinusale avec BAV paroxystique (stimulateur Reply DR, MicroPort). En mode DDD, le stimulateur commute automatiquement vers le mode ADI apr\u00e8s 100 cycles ventriculaires stimul\u00e9s. Deux stimulations atriales cons\u00e9cutives sont alors bloqu\u00e9es (absence de QRS spontan\u00e9) : le crit\u00e8re BAV III est rempli et le stimulateur commute de nouveau vers le mode DDD. Des ondes P bloqu\u00e9es peuvent donc \u00eatre observ\u00e9es lors de chaque recherche de conduction spontan\u00e9e.<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-97e87b8 elementor-widget elementor-widget-heading\" data-id=\"97e87b8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Vp-Suppression : TRE d\u00e9clench\u00e9e par la recherche de conduction spontan\u00e9e<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5225a33 elementor-widget elementor-widget-image\" data-id=\"5225a33\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/07\/pm-algorithms-av-conduction-book-fig4-fr.webp\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"Algorithms favoring AV conduction \u2013 book tracing 4 (FR)\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MTI2MzksInVybCI6Imh0dHBzOlwvXC9jYXJkaW9jYXNlcy5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjVcLzA3XC9wbS1hbGdvcml0aG1zLWF2LWNvbmR1Y3Rpb24tYm9vay1maWc0LWZyLndlYnAifQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1344\" height=\"638\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/07\/pm-algorithms-av-conduction-book-fig4-fr.webp\" class=\"attachment-full size-full wp-image-12639\" alt=\"Vp-Suppression et TRE (stimulateur Evia DR-T, Biotronik ; BAV paroxystique). La recherche de conduction spontan\u00e9e allonge le d\u00e9lai AV \u00e0 450 ms sur 8 cycles, ce qui favorise une co\u2026\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/07\/pm-algorithms-av-conduction-book-fig4-fr.webp 1344w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/07\/pm-algorithms-av-conduction-book-fig4-fr-300x142.webp 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/07\/pm-algorithms-av-conduction-book-fig4-fr-1024x486.webp 1024w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/07\/pm-algorithms-av-conduction-book-fig4-fr-768x365.webp 768w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/07\/pm-algorithms-av-conduction-book-fig4-fr-18x9.webp 18w\" sizes=\"(max-width: 1344px) 100vw, 1344px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3adf57a elementor-widget elementor-widget-text-editor\" data-id=\"3adf57a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div style=\"background:#f1f5f8;border-left:4px solid #7DA5B9;padding:9px 13px;margin:2px 0 4px;font-size:14px;line-height:1.55;border-radius:0 4px 4px 0\"><strong>Figure \u2013<\/strong> Vp-Suppression et TRE (stimulateur Evia DR-T, Biotronik ; BAV paroxystique). La recherche de conduction spontan\u00e9e allonge le d\u00e9lai AV \u00e0 450 ms sur 8 cycles, ce qui favorise une conduction atriale r\u00e9trograde d\u00e9tect\u00e9e en dehors des p\u00e9riodes r\u00e9fractaires. Apr\u00e8s le 8e cycle, la recherche a \u00e9chou\u00e9 et le stimulateur revient en mode DDD, mais la conduction r\u00e9trograde entretient une TRE. Apr\u00e8s 8 cycles VP-AS stables au-del\u00e0 de 100 battements\/minute, le stimulateur diagnostique la TRE et allonge la PRAPV sur un cycle, ce qui interrompt la tachycardie.<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8cbe9d4 elementor-widget elementor-widget-heading\" data-id=\"8cbe9d4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Pages par constructeur<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3f023c1 elementor-widget elementor-widget-text-editor\" data-id=\"3f023c1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Chaque fabricant a des caract\u00e9ristiques de fonctionnement sp\u00e9cifiques pour favoriser la conduction AV. Vous trouverez de plus amples informations sur la page de chaque fabricant :<\/p><p><strong>Abbott \u2013 VIP (Ventricular Intrinsic Preference).<\/strong> Pas un mode sp\u00e9cifique mais une hyst\u00e9r\u00e9sis du d\u00e9lai AV, qui pr\u00e9serve une activation atrioventriculaire 1:1 au prix d\u2019un risque accru de TRE ; une alerte de t\u00e9l\u00e9surveillance peut \u00eatre programm\u00e9e quand le pourcentage de stimulation ventriculaire d\u00e9passe un seuil.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4aa0fec elementor-widget elementor-widget-text-editor\" data-id=\"4aa0fec\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul><li><a href=\"\/fr\/pacing-defibrillation\/devices-per-company\/abbott\/pacing-modes-abbott\/\">Modes de stimulation Abbott (VIP)<\/a><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-dc12d04 elementor-widget elementor-widget-text-editor\" data-id=\"dc12d04\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Biotronik \u2013 Vp-Suppression.<\/strong> Parmi les crit\u00e8res de commutation, seul le crit\u00e8re de BAV du second degr\u00e9 est programmable, et aucun EGM n\u2019est enregistr\u00e9 lors de la commutation vers le mode DDD.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9c970f3 elementor-widget elementor-widget-text-editor\" data-id=\"9c970f3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul><li><a href=\"\/fr\/pacing-defibrillation\/devices-per-company\/biotronik\/pacing-modes-biotronik\/\">Modes de stimulation Biotronik (Vp-Suppression)<\/a><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9692a11 elementor-widget elementor-widget-text-editor\" data-id=\"9692a11\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Boston Scientific \u2013 RYTHMIQ.<\/strong> Sur Off en nominal ; il doit \u00eatre programm\u00e9 avec la Recherche AV+, sans quoi le stimulateur reste en DDD(R) apr\u00e8s la premi\u00e8re commutation jusqu\u2019\u00e0 la prochaine interrogation. Les deux doivent \u00eatre d\u00e9programm\u00e9s en cas de BAV complet permanent.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-745f66b elementor-widget elementor-widget-text-editor\" data-id=\"745f66b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul><li><a href=\"\/fr\/pacing-defibrillation\/devices-per-company\/boston-scientific\/pacing-modes-boston-scientific\/\">Modes de stimulation Boston Scientific (RYTHMIQ, Recherche AV+)<\/a><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8a5b86a elementor-widget elementor-widget-text-editor\" data-id=\"8a5b86a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Medtronic \u2013 MVP (Managed Ventricular Pacing).<\/strong> Sa signature ECG est le d\u00e9lai AV court de 80 ms sur le cycle qui suit l\u2019onde P bloqu\u00e9e ; la nouvelle version ajoute une commutation sur PR long et r\u00e9duit la pause ventriculaire.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-45da14a elementor-widget elementor-widget-text-editor\" data-id=\"45da14a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul><li><a href=\"\/fr\/pacing-defibrillation\/devices-per-company\/medtronic\/mvp-medtronic\/\">MVP Medtronic<\/a><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0585c76 elementor-widget elementor-widget-text-editor\" data-id=\"0585c76\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>MicroPort \u2013 SafeR.<\/strong> Les m\u00e9moires (AIDA) documentent le nombre, l\u2019historique et la distribution des commutations, avec un EGM au moment du BAV, ce qui aide \u00e0 identifier les commutations inappropri\u00e9es.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4ae4b2a elementor-widget elementor-widget-text-editor\" data-id=\"4ae4b2a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul><li><a href=\"\/fr\/pacing-defibrillation\/devices-per-company\/microport-crm\/pacing-modes-microport\/\">Modes de stimulation MicroPort (SafeR)<\/a><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-41208f3 elementor-widget elementor-widget-heading\" data-id=\"41208f3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Voir aussi<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f816313 elementor-widget elementor-widget-text-editor\" data-id=\"f816313\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul><li><a href=\"\/fr\/pacing-defibrillation\/basic-concepts\/pacemaker\/traditional-pacing-modes\/\">Modes de stimulation traditionnels<\/a><\/li><li><a href=\"\/fr\/pacing-defibrillation\/basic-concepts\/pacemaker\/general-av-delay-and-refractory-periods\/\">D\u00e9lai AV et p\u00e9riodes r\u00e9fractaires (hyst\u00e9r\u00e9sis du d\u00e9lai AV)<\/a><\/li><li><a href=\"\/fr\/pacing-defibrillation\/basic-concepts\/pacemaker\/pacemaker-mediated-tachycardia\/\">Tachycardies par r\u00e9entr\u00e9e \u00e9lectronique<\/a><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Algorithms favoring AV conduction Content Why avoid unnecessary right ventricular pacing? Extensive literature demonstrates the deleterious effect of prolonged right ventricular pacing on left ventricular function: it induces deleterious ventricular remodeling, with increased ventricular volumes and an increased risk of atrial arrhythmia. Similarly, any reduction in unnecessary ventricular pacing saves battery, prolongs the life of [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":21,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-252","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pacemaker Algorithms Favoring AV Conduction | Cardiocases<\/title>\n<meta name=\"description\" content=\"Pacemaker algorithms promoting intrinsic AV conduction \u2014 MVP, SafeR, AV Search+ &amp; ECG tracings.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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