{"id":314,"date":"2025-07-14T13:56:23","date_gmt":"2025-07-14T13:56:23","guid":{"rendered":"https:\/\/cardiocases.com\/?page_id=314"},"modified":"2026-01-06T20:22:15","modified_gmt":"2026-01-06T20:22:15","slug":"af-prevention-algorithms","status":"publish","type":"page","link":"https:\/\/cardiocases.com\/fr\/pacing-defibrillation\/basic-concepts\/pacemaker\/af-prevention-algorithms\/","title":{"rendered":"Algorithmes de pr\u00e9vention de la FA"},"content":{"rendered":"<div data-elementor-type=\"wp-page\" data-elementor-id=\"314\" class=\"elementor elementor-314\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-02f2c31 e-con-full e-flex e-con e-parent\" data-id=\"02f2c31\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2f92bd2 elementor-widget elementor-widget-heading\" data-id=\"2f92bd2\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Algorithmes de pr\u00e9vention de la FA<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-ede44ef e-con-full e-flex e-con e-parent\" data-id=\"ede44ef\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4de4c93 elementor-toc--minimized-on-tablet elementor-widget elementor-widget-table-of-contents\" data-id=\"4de4c93\" data-element_type=\"widget\" data-settings=\"{&quot;headings_by_tags&quot;:[&quot;h3&quot;,&quot;h4&quot;,&quot;h5&quot;],&quot;exclude_headings_by_selector&quot;:[],&quot;no_headings_message&quot;:&quot;No headings were found on this page.&quot;,&quot;marker_view&quot;:&quot;bullets&quot;,&quot;icon&quot;:{&quot;value&quot;:&quot;fas fa-circle&quot;,&quot;library&quot;:&quot;fa-solid&quot;,&quot;rendered_tag&quot;:&quot;&lt;svg class=\\&quot;e-font-icon-svg e-fas-circle\\&quot; viewBox=\\&quot;0 0 512 512\\&quot; xmlns=\\&quot;http:\\\/\\\/www.w3.org\\\/2000\\\/svg\\&quot;&gt;&lt;path d=\\&quot;M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 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\tG\u00e9n\u00e9ralit\u00e9s\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__4de4c93\" 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__4de4c93\" 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__4de4c93\" 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\t\t<div class=\"elementor-element elementor-element-d4a20df elementor-widget elementor-widget-text-editor\" data-id=\"d4a20df\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Certains algorithmes ont \u00e9t\u00e9 d\u00e9velopp\u00e9s par les diff\u00e9rents constructeurs pour r\u00e9duire la charge en arythmie atriale.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-810f535 e-con-full e-flex e-con e-parent\" data-id=\"810f535\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-732b4af elementor-widget elementor-widget-heading\" data-id=\"732b4af\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Informations sp\u00e9cifiques \u00e0 la marque<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-24edeea elementor-widget elementor-widget-text-editor\" data-id=\"24edeea\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ol>\n<li>Il existe un algorithme de pr\u00e9vention de la FA bas\u00e9 sur l'augmentation de la fr\u00e9quence de stimulation atriale pour les 5 grands constructeurs: Biotronik (Overdrive auriculaire), Boston Scientific (pr\u00e9f\u00e9rence \u00e0 la stimulation atriale), Medtronic (Pr\u00e9f\u00e9rence de stimulation atriale), Abbott (AF suppression) et Microport CRM-Sorin (Overdrive du rythme sinusal).<\/li>\n<li>Il existe un algorithme permettant d'\u00e9viter la pause post extrasystolique atriale et\/ou augmentant la fr\u00e9quence de stimulation \u00e0 la suite d'une extrasystole atriale pour les stimulateurs Boston Scientific (PSA\/ProACt), Medtronic (Stabilisation du rythme atrial) et Microport CRM-Sorin (Suppression de pause sur ESA et Acc\u00e9l\u00e9ration fr\u00e9quence sur ESA).<\/li>\n<li>Il existe un algorithme permettant de r\u00e9gulariser la fr\u00e9quence ventriculaire lors d'un passage en FA (\u00e9viter les diastoles longues) pour les stimulateurs Biotronik (stabilisation de fr\u00e9quence), Boston Scientific (R\u00e9gulation de la Fr\u00e9quence Ventriculaire) et Medtronic (R\u00e9ponse \u00e0 une FA conduite).<\/li>\n<li>Il existe un algorithme d'acc\u00e9l\u00e9ration de la fr\u00e9quence de stimulation en fin d'\u00e9pisode d\u2019arythmie sur les stimulateurs Medtronic (Stimulation rapide post-commutation de mode).<\/li>\n<\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d0b3317 elementor-widget elementor-widget-heading\" data-id=\"d0b3317\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\">Abbott<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c37a9bf elementor-widget elementor-widget-text-editor\" data-id=\"c37a9bf\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6>AF Suppression<\/h6><p>L'algorithme AF Suppression\u2122 permet \u00e0 l'appareil de stimuler l'oreillette \u00e0 des fr\u00e9quences plus rapides que la fr\u00e9quence atriale intrins\u00e8que (overdrive).<\/p><p>Lorsque l\u2019algorithme d\u00e9tecte deux ondes P dans une fen\u00eatre de 16 cycles, l\u2019appareil augmente la fr\u00e9quence de stimulation pour neutraliser la conduction spontan\u00e9e. Apr\u00e8s stimulation \u00e0 la fr\u00e9quence de l\u2019Algorithme AF Suppression pendant le nombre de cycles indiqu\u00e9s par le param\u00e8tre Nombre de cycles d\u2019overdrive (15 \u00e0 40 ; nominal 15), l\u2019appareil ralentit sa fr\u00e9quence jusqu\u2019\u00e0 ce qu\u2019il d\u00e9tecte deux nouvelles ondes P. Si deux ondes P sont d\u00e9tect\u00e9es, il repasse en stimulation rapide (overdrive). S\u2019il ne d\u00e9tecte pas deux ondes P, la stimulation reprend selon le r\u00e9glage de la fr\u00e9quence de base, de la fr\u00e9quence de repos ou de la fr\u00e9quence capteur.<\/p><p>Calcul de la fr\u00e9quence d\u2019overdrive: pour des fr\u00e9quences de simulation 151 bpm, overdrive fixe de 5 bpm (= fr\u00e9quence maximale d\u2019overdrive); pour des fr\u00e9quences situ\u00e9es entre 60 et 150 bpm, l\u2019algorithme AF Suppression augmente la fr\u00e9quence de stimulation d\u2019un delta compris entre la fr\u00e9quence minimale d\u2019overdrive et la fr\u00e9quence maximale d\u2019overdrive.<\/p><p>Retour \u00e0 la fr\u00e9quence de base: ce param\u00e8tre non programmable d\u00e9termine l\u2019intervalle et la pente de r\u00e9duction depuis la fr\u00e9quence d\u2019overdrive jusqu\u2019\u00e0 la fr\u00e9quence de base, fr\u00e9quence de repos ou fr\u00e9quence indiqu\u00e9e par le capteur; si la fr\u00e9quence d\u2019overdrive est sup\u00e9rieure \u00e0 100 bpm, 8ms sont ajout\u00e9es \u00e0 chaque cycle jusqu\u2019\u00e0 100 bpm puis + 12ms jusqu\u2019\u00e0 la fr\u00e9quence de base.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6ff4e5d elementor-widget elementor-widget-image\" data-id=\"6ff4e5d\" data-element_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=\"http:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa9-1.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_arythmies_fa9\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjY4MiwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfYXJ5dGhtaWVzX2ZhOS0xLnBuZyJ9\">\n\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"512\" height=\"215\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa9-1.png\" class=\"attachment-large size-large wp-image-6682\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa9-1.png 512w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa9-1-300x126.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa9-1-18x8.png 18w\" sizes=\"(max-width: 512px) 100vw, 512px\" \/>\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-efa489f elementor-widget elementor-widget-image\" data-id=\"efa489f\" data-element_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=\"http:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa10-1.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_arythmies_fa10\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjY4MSwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfYXJ5dGhtaWVzX2ZhMTAtMS5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"491\" height=\"832\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa10-1.png\" class=\"attachment-large size-large wp-image-6681\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa10-1.png 491w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa10-1-177x300.png 177w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa10-1-7x12.png 7w\" sizes=\"(max-width: 491px) 100vw, 491px\" \/>\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-1b0a70d elementor-widget elementor-widget-heading\" data-id=\"1b0a70d\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\">Biotronik<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fa8d800 elementor-widget elementor-widget-text-editor\" data-id=\"fa8d800\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6>Overdrive auriculaire<\/h6>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-20e9eb6 elementor-widget elementor-widget-image\" data-id=\"20e9eb6\" data-element_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=\"http:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa1.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_arythmies_fa1\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjY5MCwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfYXJ5dGhtaWVzX2ZhMS5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"518\" height=\"283\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa1.png\" class=\"attachment-large size-large wp-image-6690\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa1.png 518w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa1-300x164.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa1-18x10.png 18w\" sizes=\"(max-width: 518px) 100vw, 518px\" \/>\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-f802e5c elementor-widget elementor-widget-text-editor\" data-id=\"f802e5c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Il s\u2019agit d\u2019un algorithme permettant \u00ab l\u2019overdrive \u00bb de l\u2019activation atriale spontan\u00e9e en augmentant la fr\u00e9quence de stimulation atriale.<\/p><p>\u00a0<\/p><h6>Stabilisation de fr\u00e9quence<\/h6><p>Il s\u2019agit d\u2019un algorithme ayant pour objectif de r\u00e9duire les variations de fr\u00e9quence (alternance cycles courts \u2013 cycles longs) lors d\u2019un passage en FA quand la conduction atrio-ventriculaire est pr\u00e9serv\u00e9e. Le dispositif d\u00e9termine une fr\u00e9quence moyenne sur 4 cycles et stimule le ventricule d\u00e8s que la fr\u00e9quence descend de 10 bpm en dessous de cette fr\u00e9quence.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-05e22cb elementor-widget elementor-widget-heading\" data-id=\"05e22cb\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\">Boston Scientific<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f527817 elementor-widget elementor-widget-text-editor\" data-id=\"f527817\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6>Pr\u00e9f\u00e9rence \u00e0 la stimulation atriale (PSA)<\/h6>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-90ed9cb elementor-widget elementor-widget-image\" data-id=\"90ed9cb\" data-element_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=\"http:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa2.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_arythmies_fa2\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjY4OSwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfYXJ5dGhtaWVzX2ZhMi5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"373\" height=\"235\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa2.png\" class=\"attachment-large size-large wp-image-6689\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa2.png 373w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa2-300x189.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa2-18x12.png 18w\" sizes=\"(max-width: 373px) 100vw, 373px\" \/>\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-ff052e0 elementor-widget elementor-widget-text-editor\" data-id=\"ff052e0\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Cet algorithme a pour objectif de pr\u00e9venir la survenue d'une FA en stimulant l'oreillette \u00e0 une fr\u00e9quence l\u00e9g\u00e8rement sup\u00e9rieure au rythme intrins\u00e8que (8 ms). La fr\u00e9quence de stimulation atriale est donc augment\u00e9e lorsque des \u00e9v\u00e8nements atriaux d\u00e9tect\u00e9s se produisent (raccourcissement de l\u2019intervalle VA de 8 ms). La fr\u00e9quence de stimulation PSA est limit\u00e9e par la Fr\u00e9quence de stimulation maximale PSA qui est programmable. En l'absence d\u2019\u00e9v\u00e8nement d\u00e9tect\u00e9, la fr\u00e9quence de stimulation est diminu\u00e9e progressivement (intervalle V-A augment\u00e9 de 10ms).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-24c2081 elementor-widget elementor-widget-image\" data-id=\"24c2081\" data-element_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=\"http:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa3.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_arythmies_fa3\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjY4OCwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfYXJ5dGhtaWVzX2ZhMy5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"537\" height=\"226\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa3.png\" class=\"attachment-large size-large wp-image-6688\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa3.png 537w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa3-300x126.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa3-18x8.png 18w\" sizes=\"(max-width: 537px) 100vw, 537px\" \/>\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-364fd2d elementor-widget elementor-widget-text-editor\" data-id=\"364fd2d\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6>PSA\/ProACt<\/h6><p>Cet algorithme permet d'augmenter la fr\u00e9quence de stimulation \u00e0 la suite d'une d\u2019ESA afin d'\u00e9viter la succession cycle court - cycle long.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-43f2273 elementor-widget elementor-widget-image\" data-id=\"43f2273\" data-element_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=\"http:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa4.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_arythmies_fa4\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjY4NywidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfYXJ5dGhtaWVzX2ZhNC5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"603\" height=\"309\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa4.png\" class=\"attachment-large size-large wp-image-6687\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa4.png 603w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa4-300x154.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa4-18x9.png 18w\" sizes=\"(max-width: 603px) 100vw, 603px\" \/>\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-6c64171 elementor-widget elementor-widget-text-editor\" data-id=\"6c64171\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>A la suite d'une ESA, l\u2019algorithme ProAct calcule 75 % de l\u2019intervalle VV pr\u00e9c\u00e9dant l\u2019ESA et applique cet intervalle au cycle suivant afin de favoriser la stimulation atriale. La fr\u00e9quence de stimulation est ensuite progressivement abaiss\u00e9e jusqu\u2019\u00e0 la fr\u00e9quence minimale en prolongeant de 10 ms l\u2019intervalle VV si 4 cycles cons\u00e9cutifs surviennent avec une d\u00e9tection non ESA, aucun \u00e9v\u00e8nement atrial ou une stimulation atriale. Ce nouvel intervalle VA est utilis\u00e9 jusqu\u2019\u00e0 la d\u00e9tection d\u2019une ESA et le raccourcissement de l\u2019intervalle VV par l\u2019algorithme ou jusqu\u2019\u00e0 ce que l\u2019intervalle VV soit \u00e0 nouveau prolong\u00e9 de 10 ms. La fr\u00e9quence PSA\/ProAct indiqu\u00e9e est limit\u00e9e par la valeur de la fr\u00e9quence de stimulation maximale PSA\/ProAct.<\/p><h6>R\u00e9gulation de la Fr\u00e9quence Ventriculaire (RFV)<\/h6><p>Chez la majorit\u00e9 des patients l\u2019arythmie auriculaire engendre une r\u00e9ponse ventriculaire rapide et irr\u00e9guli\u00e8re, l\u2019irr\u00e9gularit\u00e9 des cycles ventriculaires pouvant alt\u00e9rer l\u2019h\u00e9modynamique du patient.<\/p><p>L'objectif de cet algorithme est de r\u00e9duire la variabilit\u00e9 des cycles RR en augmentant le pourcentage de stimulation. Plus la longueur des cycles ventriculaires est irr\u00e9guli\u00e8re, plus l\u2019algorithme force la stimulation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6d185c7 elementor-widget elementor-widget-image\" data-id=\"6d185c7\" data-element_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=\"http:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa5.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_arythmies_fa5\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjY4NiwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfYXJ5dGhtaWVzX2ZhNS5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"521\" height=\"290\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa5.png\" class=\"attachment-large size-large wp-image-6686\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa5.png 521w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa5-300x167.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa5-18x10.png 18w\" sizes=\"(max-width: 521px) 100vw, 521px\" \/>\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-f1ce9e9 elementor-widget elementor-widget-text-editor\" data-id=\"f1ce9e9\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>La moyenne pond\u00e9r\u00e9e des 32 cycles pr\u00e9c\u00e9dents est utilis\u00e9e pour d\u00e9terminer la fr\u00e9quence limite de stimulation en RFV. L\u2019algorithme de RFV r\u00e9pond \u00e0 un historique de plusieurs intervalles avec plus d\u2019importance donn\u00e9e aux intervalles r\u00e9cents :<\/p><ul><li>pour les cycles d\u00e9tect\u00e9s : intervalle RFV = 1.1 * 1\/16 intervalles Courant +  15\/16 RFV(t-1)<\/li><li>pour les cycles stimul\u00e9s : intervalle RFV = 1.1 * 1\/16 intervalles Courant +  15\/16 RFV(t-1)<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-608bfdf elementor-widget elementor-widget-image\" data-id=\"608bfdf\" data-element_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=\"http:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa6.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_arythmies_fa6\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjY4NSwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfYXJ5dGhtaWVzX2ZhNi5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"615\" height=\"563\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa6.png\" class=\"attachment-large size-large wp-image-6685\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa6.png 615w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa6-300x275.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa6-13x12.png 13w\" sizes=\"(max-width: 615px) 100vw, 615px\" \/>\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-9ac40ae elementor-widget elementor-widget-heading\" data-id=\"9ac40ae\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\">Medtronic<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ce63997 elementor-widget elementor-widget-text-editor\" data-id=\"ce63997\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6>Stimulation atriale non-comp\u00e9titive<\/h6><p>Une arythmie atriale peut \u00eatre amorc\u00e9e si un \u00e9v\u00e9nement atrial stimul\u00e9 survient au cours de la p\u00e9riode vuln\u00e9rable de l\u2019oreillette. La stimulation atriale non comp\u00e9titive (SANC) est con\u00e7ue pour \u00e9viter le d\u00e9clenchement d\u2019une arythmie atriale par une stimulation au cours de la p\u00e9riode r\u00e9fractaire relative de l\u2019oreillette.<\/p><p>Lorsque la SANC est programm\u00e9e sur Marche, un \u00e9v\u00e9nement atrial r\u00e9fractaire d\u00e9tect\u00e9 au cours de la PRAPV d\u00e9clenche une p\u00e9riode SANC programmable pendant laquelle aucune stimulation atriale ne peut se produire.<\/p><p>Lorsque la stimulation atriale est retard\u00e9e par le fonctionnement de la SANC, le stimulateur tente de conserver une fr\u00e9quence ventriculaire stable en r\u00e9duisant le d\u00e9lai AV stimul\u00e9 qui suit. Il ne raccourcit cependant pas le d\u00e9lai AV stimul\u00e9 \u00e0 moins de 30 ms.<\/p><p>L\u2019intervalle SANC est de 400 ms pour 1 cycle de stimulation \u00e0 chaque fois qu\u2019une r\u00e9ponse aux ESV ou une intervention anti-TRE se produit.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-37f3b92 elementor-widget elementor-widget-image\" data-id=\"37f3b92\" data-element_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=\"http:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa7.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_arythmies_fa7\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjY4NCwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfYXJ5dGhtaWVzX2ZhNy5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"608\" height=\"259\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa7.png\" class=\"attachment-large size-large wp-image-6684\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa7.png 608w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa7-300x128.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa7-18x8.png 18w\" sizes=\"(max-width: 608px) 100vw, 608px\" \/>\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-ef2f0f8 elementor-widget elementor-widget-text-editor\" data-id=\"ef2f0f8\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6>Pr\u00e9f\u00e9rence de stimulation atriale<\/h6><p>La pr\u00e9f\u00e9rence de stimulation atriale (PSA) est con\u00e7ue pour r\u00e9duire l'incidence des tachyarythmies atriales en r\u00e9agissant aux variations de la fr\u00e9quence atriale en acc\u00e9l\u00e9rant la fr\u00e9quence de stimulation jusqu\u2019\u00e0 atteindre un rythme stimul\u00e9 stable, l\u00e9g\u00e8rement plus rapide que la fr\u00e9quence spontan\u00e9e. Apr\u00e8s chaque \u00e9v\u00e9nement d\u00e9tect\u00e9 atrial non r\u00e9fractaire, le dispositif diminue l\u2019intervalle de stimulation atriale de la valeur du d\u00e9cr\u00e9ment d\u2019intervalle programm\u00e9e. Les impulsions de stimulation atriale d\u00e9livr\u00e9es pour la PSA sont annot\u00e9es PP (stimulation proactive) sur le marqueur d\u2019\u00e9v\u00e9nements.<\/p><p>Si l'\u00e9v\u00e9nement atrial suivant est un autre \u00e9v\u00e9nement d\u00e9tect\u00e9 non r\u00e9fractaire, l'intervalle de stimulation est \u00e0 nouveau d\u00e9cr\u00e9ment\u00e9. Cette progression continue jusqu'\u00e0 ce que la fr\u00e9quence de stimulation d\u00e9passe la fr\u00e9quence spontan\u00e9e, r\u00e9sultant en un rythme atrial stimul\u00e9. Cependant, la valeur de la fr\u00e9quence maximale programm\u00e9e fournit une limite de fr\u00e9quence pour la pr\u00e9f\u00e9rence de stimulation atriale. Apr\u00e8s une p\u00e9riode programmable de stimulation atriale \u00e0 100%, le stimulateur d\u00e9cro\u00eet progressivement la fr\u00e9quence de stimulation \u00e0 la recherche du battement spontan\u00e9 suivant. Le battement sinusal suivant relance la pr\u00e9f\u00e9rence de stimulation.<\/p><h6>Stabilisation du rythme auriculaire<\/h6><p>La stabilisation du rythme atrial (SRA) est une fonction programmable con\u00e7ue pour \u00e9viter la pause sinusale qui suit une ESA (s\u00e9quences cycles court-long-court qui peuvent entra\u00eener le d\u00e9marrage brutal de certaines tachyarythmies atriales). Elle r\u00e9agit \u00e0 une ESA en \u00e9levant instantan\u00e9ment la fr\u00e9quence de stimulation atriale puis en ralentissant r\u00e9guli\u00e8rement la fr\u00e9quence jusqu\u2019\u00e0 la fr\u00e9quence spontan\u00e9e, la fr\u00e9quence de stimulation programm\u00e9e ou la fr\u00e9quence capteur.<\/p><p>Lorsque le dispositif est activ\u00e9 par une ESA, il d\u00e9livre une impulsion de stimulation \u00e0 l\u2019intervalle pr\u00e9matur\u00e9 augment\u00e9 d\u2019un pourcentage de cet intervalle (d\u00e9fini par le param\u00e8tre Incr\u00e9ment intervalles en pourcentage programm\u00e9). Pour chaque \u00e9v\u00e9nement atrial stimul\u00e9 ou d\u00e9tect\u00e9 ult\u00e9rieur, le dispositif continue \u00e0 augmenter chaque intervalle de stimulation du pourcentage programm\u00e9 de l\u2019intervalle pr\u00e9c\u00e9dent. Le param\u00e8tre fr\u00e9quence maximale d\u00e9finit une limite pour la SRA. Les impulsions de stimulation atriale d\u00e9livr\u00e9es pour la SRA sont annot\u00e9es PP (stimulation proactive) sur le marqueur d\u2019\u00e9v\u00e9nements.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6bee1c7 elementor-widget elementor-widget-image\" data-id=\"6bee1c7\" data-element_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=\"http:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa8.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_arythmies_fa8\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjY4MywidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfYXJ5dGhtaWVzX2ZhOC5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"701\" height=\"295\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa8.png\" class=\"attachment-large size-large wp-image-6683\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa8.png 701w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa8-300x126.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa8-18x8.png 18w\" sizes=\"(max-width: 701px) 100vw, 701px\" \/>\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-89dc71b elementor-widget elementor-widget-text-editor\" data-id=\"89dc71b\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6>Post Mode-Switch Overdrive Pacing (PMOP)<\/h6><p>La stimulation rapide post-commutation de mode (PMOP) est une fonction programmable qui fournit une stimulation atriale rapide \u00e0 la fin d\u2019une commutation de mode.<\/p><p>Apr\u00e8s une commutation de mode, le dispositif augmente la fr\u00e9quence de stimulation battement par battement (diminuant l\u2019intervalle de stimulation de 15 ms par impulsion pour l\u2019Adapta et de 70 ms pour l\u2019Advisa) jusqu\u2019\u00e0 ce qu\u2019elle atteigne la fr\u00e9quence de stimulation rapide programm\u00e9e. Il poursuit la stimulation DDIR \u00e0 la fr\u00e9quence rapide pendant la dur\u00e9e de stimulation rapide programm\u00e9e. Il r\u00e9gule ensuite le retour au mode synchrone atrial programm\u00e9 en ralentissant progressivement la fr\u00e9quence jusqu\u2019\u00e0 atteindre la fr\u00e9quence de stimulation programm\u00e9e, la fr\u00e9quence minimale programm\u00e9e ou la fr\u00e9quence capteur.<\/p><h6>R\u00e9ponse \u00e0 une FA conduite<\/h6><p>La r\u00e9ponse \u00e0 une FA conduite, appel\u00e9e stabilisation du rythme ventriculaire pour les stimulateurs pr\u00e9c\u00e9dents, est con\u00e7ue pour r\u00e9gulariser la fr\u00e9quence ventriculaire pendant la FA. Le stimulateur modifie la fr\u00e9quence de stimulation battement par battement afin de stimuler \u00e0 proximit\u00e9 de la fr\u00e9quence ventriculaire intrins\u00e8que moyenne. Les longues pauses sont \u00e9limin\u00e9es, ce qui r\u00e9duit l'irr\u00e9gularit\u00e9 de la fr\u00e9quence ventriculaire. La r\u00e9ponse \u00e0 la FA conduite fonctionne uniquement en modes asynchrones. Par cons\u00e9quent, lorsque le dispositif est programm\u00e9 en mode DDD ou DDDR, la r\u00e9ponse \u00e0 la FA conduite fonctionne uniquement pendant une commutation en mode VDIR ou DDIR. Pour programmer la r\u00e9ponse \u00e0 la FA conduite sur Marche, la commutation de mode doit \u00eatre sur Marche.<\/p><p>Les augmentations de la fr\u00e9quence de stimulation provoqu\u00e9es par la r\u00e9ponse \u00e0 la FA conduite sont limit\u00e9es par la fr\u00e9quence maximale programm\u00e9e.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-474bd22 elementor-widget elementor-widget-heading\" data-id=\"474bd22\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\">Microport<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-acfead0 elementor-widget elementor-widget-text-editor\" data-id=\"acfead0\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6>Overdrive du rythme sinusal<\/h6><p>L'objectif est d'assurer une stimulation atriale permanente l\u00e9g\u00e8rement sup\u00e9rieure au rythme sinusal pour pr\u00e9venir la survenue d'une FA  en r\u00e9duisant l'intervalle de stimulation atriale (-50 ms) \u00e0 la suite de la d\u00e9tection d'ondes P non acc\u00e9l\u00e9r\u00e9es (d\u00e9tection en dehors de la fen\u00eatre INOV (et hors fen\u00eatre de DARA)). Cette fonction est limit\u00e9e par une Fr\u00e9quence maximale d\u2019overdrive programmable. Par d\u00e9faut cet algorithme est inactif.<\/p><p>Pour \u00e9viter une acc\u00e9l\u00e9ration inappropri\u00e9e sur des extrasystoles atriales tardives, il existe une fen\u00eatre sp\u00e9cifique (la fen\u00eatre INOV, INappropriate OVerdriving). La valeur de cette fen\u00eatre de surveillance des ESA tardives est bas\u00e9e sur le temps de conduction AR ou PR et de la Fr\u00e9quence max d\u2019overdrive. Si une d\u00e9tection d'ondes P survient dans la fen\u00eatre INOV la fonction Overdrive du rythme sinusal est inhib\u00e9e.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e3574a3 elementor-widget elementor-widget-image\" data-id=\"e3574a3\" data-element_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=\"http:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa11.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_arythmies_fa11\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjY4MCwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfYXJ5dGhtaWVzX2ZhMTEucG5nIn0%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"659\" height=\"293\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa11.png\" class=\"attachment-large size-large wp-image-6680\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa11.png 659w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa11-300x133.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa11-18x8.png 18w\" sizes=\"(max-width: 659px) 100vw, 659px\" \/>\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-e36017a elementor-widget elementor-widget-text-editor\" data-id=\"e36017a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Apr\u00e8s 16 cycles \"overdriv\u00e9s\" la fr\u00e9quence de stimulation d\u00e9cro\u00eet avec le lissage programm\u00e9 (par d\u00e9faut tr\u00e8s lent). La Fr\u00e9quence max de l\u2019overdrive est ici programm\u00e9e \u00e0 100 min-1.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2605159 elementor-widget elementor-widget-image\" data-id=\"2605159\" data-element_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=\"http:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa12.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_arythmies_fa12\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjY3OCwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfYXJ5dGhtaWVzX2ZhMTIucG5nIn0%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"577\" height=\"349\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa12.png\" class=\"attachment-large size-large wp-image-6678\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa12.png 577w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa12-300x181.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa12-18x12.png 18w\" sizes=\"(max-width: 577px) 100vw, 577px\" \/>\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-c2d8d97 elementor-widget elementor-widget-image\" data-id=\"c2d8d97\" data-element_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=\"http:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa13.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_arythmies_fa13\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjY3OSwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfYXJ5dGhtaWVzX2ZhMTMucG5nIn0%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"636\" height=\"930\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa13.png\" class=\"attachment-large size-large wp-image-6679\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa13.png 636w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa13-205x300.png 205w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa13-8x12.png 8w\" sizes=\"(max-width: 636px) 100vw, 636px\" \/>\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-a26d940 elementor-widget elementor-widget-text-editor\" data-id=\"a26d940\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6>Suppression de Pause sur ESA<\/h6><p>L'objectif de cet algorithme est d'\u00e9viter la survenue d'une fibrillation atriale  sur une succession cycle court atrial (extrasystole), cycle long (pause compensatrice).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f3b7d2d elementor-widget elementor-widget-image\" data-id=\"f3b7d2d\" data-element_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=\"http:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa14.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_arythmies_fa14\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjY3NywidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfYXJ5dGhtaWVzX2ZhMTQucG5nIn0%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"678\" height=\"280\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa14.png\" class=\"attachment-large size-large wp-image-6677\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa14.png 678w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa14-300x124.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa14-18x7.png 18w\" sizes=\"(max-width: 678px) 100vw, 678px\" \/>\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-1ceea95 elementor-widget elementor-widget-text-editor\" data-id=\"1ceea95\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Sur une ESA isol\u00e9e \"tardive\" (avec un couplage sup\u00e9rieur \u00e0 plus de 50% du dernier intervalle  P-P), l\u2019algorithme d\u00e9clenche un d\u00e9lai AV automatique et d\u2019un intervalle d'\u00e9chappement interm\u00e9diaire.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9339616 elementor-widget elementor-widget-image\" data-id=\"9339616\" data-element_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=\"http:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa15.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_arythmies_fa15\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjY3NiwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfYXJ5dGhtaWVzX2ZhMTUucG5nIn0%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"659\" height=\"328\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa15.png\" class=\"attachment-large size-large wp-image-6676\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa15.png 659w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa15-300x149.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa15-18x9.png 18w\" sizes=\"(max-width: 659px) 100vw, 659px\" \/>\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-c6e58b0 elementor-widget elementor-widget-text-editor\" data-id=\"c6e58b0\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6>Acc\u00e9l\u00e9ration de fr\u00e9quence sur ESA<\/h6><p>Pour r\u00e9duire le nombre d'extrasystole, cet algorithme autorise une acc\u00e9l\u00e9ration de fr\u00e9quence (~ 5 min-1) temporairement (24 cycles) suite \u00e0 des extrasystoles atriales isol\u00e9es fr\u00e9quentes (s\u00e9par\u00e9es par un maximum de 15 cycles atriaux normaux). Par d\u00e9faut cet algorithme est inactif. La phase d\u2019acc\u00e9l\u00e9ration est arr\u00eat\u00e9e si la fr\u00e9quence maximale d\u2019acc\u00e9l\u00e9ration est atteinte ou si le compteur maximal d'ESA est atteint. Ces deux crit\u00e8res d\u2019arr\u00eat sont non programmables. Cet arr\u00eat est suivi par un lissage \"d\u00e9finitif\" jusqu\u2019\u00e0 la fr\u00e9quence de base.<\/p><p>La fr\u00e9quence maximale d\u2019acc\u00e9l\u00e9ration est calcul\u00e9e comme suit: si la fr\u00e9quence atriale est inf\u00e9rieur \u00e0 90 min-1, l'intervalle d'\u00e9chappement repr\u00e9sente 75% de la moyenne des huit derniers intervalles P-P juste avant la premi\u00e8re ESA. Dans le cas contraire, l'intervalle d'\u00e9chappement repr\u00e9sente  75% de la moyenne des huit derniers intervalles P-P juste avant la premi\u00e8re ESA + 50 ms.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f3c5835 elementor-widget elementor-widget-image\" data-id=\"f3c5835\" data-element_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=\"http:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa16.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_arythmies_fa16\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjY3NSwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfYXJ5dGhtaWVzX2ZhMTYucG5nIn0%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"661\" height=\"595\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa16.png\" class=\"attachment-large size-large wp-image-6675\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa16.png 661w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa16-300x270.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa16-13x12.png 13w\" sizes=\"(max-width: 661px) 100vw, 661px\" \/>\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>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>AF prevention algorithms Content Certain algorithms have been developed by different manufacturers to reduce the burden of atrial arrhythmia. Brand specific information An AF prevention algorithm based on increasing atrial pacing frequency is available for the 5 major manufacturers: Biotronik (Atrial Overdrive), Boston Scientific (Atrial Pacing Preference), Medtronic (Atrial Pacing Preference), Abbott (AF Suppression) and [&hellip;]<\/p>","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-314","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pacemaker AF Prevention Algorithms | Cardiocases<\/title>\n<meta name=\"description\" content=\"Pacemaker AF prevention algorithms \u2014 overdrive pacing, atrial preference pacing &amp; ECG tracings. For electrophysiologists.\" \/>\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\/pacing-defibrillation\/basic-concepts\/pacemaker\/af-prevention-algorithms\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pacemaker AF Prevention Algorithms | Cardiocases\" \/>\n<meta property=\"og:description\" content=\"Pacemaker AF prevention algorithms \u2014 overdrive pacing, atrial preference pacing &amp; ECG tracings. 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