{"id":3583,"date":"2025-10-08T18:41:06","date_gmt":"2025-10-08T18:41:06","guid":{"rendered":"https:\/\/cardiocases.com\/?page_id=3583"},"modified":"2025-11-18T15:50:55","modified_gmt":"2025-11-18T15:50:55","slug":"av-delay-pmt-refractory-periods-microport","status":"publish","type":"page","link":"https:\/\/cardiocases.com\/fr\/pacing-defibrillation\/devices-per-company\/microport-crm\/av-delay-pmt-refractory-periods-microport\/","title":{"rendered":"D\u00e9lai AV, TRE, p\u00e9riodes r\u00e9fractaires"},"content":{"rendered":"<div data-elementor-type=\"wp-page\" data-elementor-id=\"3583\" class=\"elementor elementor-3583\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1769d6e e-con-full e-flex e-con e-parent\" data-id=\"1769d6e\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-fd93b3c elementor-widget elementor-widget-heading\" data-id=\"fd93b3c\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Microport - retard AV, PMT, p\u00e9riodes r\u00e9fractaires<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fcf3842 elementor-toc--minimized-on-tablet elementor-widget elementor-widget-table-of-contents\" data-id=\"fcf3842\" 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__fcf3842\" 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__fcf3842\" 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__fcf3842\" 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-59a162b elementor-widget elementor-widget-heading\" data-id=\"59a162b\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Les p\u00e9riodes r\u00e9fractaires atriales<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6e7c246 elementor-widget elementor-widget-text-editor\" data-id=\"6e7c246\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>P\u00e9riode blanche et p\u00e9riode r\u00e9fractaire post-atriale<\/strong><\/p><p>Apr\u00e8s la d\u00e9tection de l'oreillette, une p\u00e9riode r\u00e9fractaire de 80 ms est d\u00e9clench\u00e9e dans la chambre atriale. Les 30 premi\u00e8res ms sont une p\u00e9riode r\u00e9fractaire absolue et les 50 ms suivantes peuvent \u00eatre automatiquement red\u00e9clench\u00e9es en cas de d\u00e9tection. La valeur de cette p\u00e9riode ne peut pas \u00eatre programm\u00e9e.<\/p><p>En mode DDD, apr\u00e8s stimulation auriculaire, les p\u00e9riodes correspondant au retard AV sont des p\u00e9riodes r\u00e9fractaires absolues dans la chambre auriculaire.<\/p><p>Apr\u00e8s la d\u00e9tection ou la stimulation auriculaire, une autre p\u00e9riode r\u00e9fractaire relative est d\u00e9clench\u00e9e dans la chambre auriculaire. Sa dur\u00e9e est dynamique et calcul\u00e9e en fonction du rythme auriculaire. Elle ne prend effet qu'apr\u00e8s la fin de la p\u00e9riode r\u00e9fractaire auriculaire de 80 ms. L'objectif de cette fen\u00eatre est la d\u00e9tection de l'acc\u00e9l\u00e9ration du rythme auriculaire (d'o\u00f9 son nom : WARAD).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c58dbfe elementor-widget elementor-widget-image\" data-id=\"c58dbfe\" 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\/2025\/11\/pm_19_situations_periodes_refractaires_3.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_periodes_refractaires_3\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NDkxNSwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNVwvMTFcL3BtXzE5X3NpdHVhdGlvbnNfcGVyaW9kZXNfcmVmcmFjdGFpcmVzXzMucG5nIn0%3D\">\n\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"414\" height=\"401\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_periodes_refractaires_3.png\" class=\"attachment-large size-large wp-image-4915\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_periodes_refractaires_3.png 414w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_periodes_refractaires_3-300x291.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_periodes_refractaires_3-12x12.png 12w\" sizes=\"(max-width: 414px) 100vw, 414px\" \/>\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-2b1422e elementor-widget elementor-widget-text-editor\" data-id=\"2b1422e\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Lorsque le mode de stimulation SafeR double chambre est programm\u00e9 et fonctionne en ADI, une p\u00e9riode r\u00e9fractaire de 150 ms est d\u00e9clench\u00e9e dans l'\u00e9tage auriculaire. Les 100 premi\u00e8res ms sont une p\u00e9riode r\u00e9fractaire absolue et les 50 ms suivantes sont automatiquement red\u00e9clenchables. La valeur de cette p\u00e9riode n'est pas programmable.<\/p><p><strong>P\u00e9riodes r\u00e9fractaires post-ventriculaires et auriculaires<\/strong><\/p><p>Le blanking atrial post-ventriculaire (BAPV)<\/p><p>Apr\u00e8s la stimulation ventriculaire, une p\u00e9riode r\u00e9fractaire absolue de 150 ms (valeur nominale) est d\u00e9clench\u00e9e dans la phase auriculaire. Les 100 premi\u00e8res ms constituent une p\u00e9riode r\u00e9fractaire absolue et les 50 ms suivantes sont automatiquement red\u00e9clenchables.<\/p><p>Apr\u00e8s la d\u00e9tection ventriculaire, une p\u00e9riode r\u00e9fractaire absolue de 100 ms (valeur nominale) est d\u00e9clench\u00e9e dans la chambre auriculaire. Les 50 premi\u00e8res ms constituent une p\u00e9riode r\u00e9fractaire absolue et les 50 ms suivantes peuvent \u00eatre red\u00e9clench\u00e9es automatiquement.<\/p><p>Lorsque l'utilisateur modifie la valeur du PVAB (post-stimulation), il modifie \u00e9galement le PVAB post-d\u00e9tection.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-693cbd3 elementor-widget elementor-widget-image\" data-id=\"693cbd3\" 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\/2025\/11\/pm_19_situations_periodes_refractaires_16.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_periodes_refractaires_16\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NDkxNiwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNVwvMTFcL3BtXzE5X3NpdHVhdGlvbnNfcGVyaW9kZXNfcmVmcmFjdGFpcmVzXzE2LnBuZyJ9\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"510\" height=\"583\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_periodes_refractaires_16.png\" class=\"attachment-large size-large wp-image-4916\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_periodes_refractaires_16.png 510w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_periodes_refractaires_16-262x300.png 262w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_periodes_refractaires_16-10x12.png 10w\" sizes=\"(max-width: 510px) 100vw, 510px\" \/>\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-06dad14 elementor-widget elementor-widget-heading\" data-id=\"06dad14\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Les p\u00e9riodes r\u00e9fractaires ventriculaires<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-beb192a elementor-widget elementor-widget-text-editor\" data-id=\"beb192a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>P\u00e9riode blanche et p\u00e9riode r\u00e9fractaire post-ventriculaire<\/strong><\/p><p>Apr\u00e8s la d\u00e9tection ventriculaire, une p\u00e9riode r\u00e9fractaire de 100 ms est d\u00e9clench\u00e9e dans l'\u00e9tage ventriculaire. Les 50 premi\u00e8res ms sont une p\u00e9riode r\u00e9fractaire absolue et les 50 ms suivantes sont automatiquement red\u00e9clench\u00e9es. La valeur de cette p\u00e9riode n'est pas programmable.<\/p><p>Apr\u00e8s la stimulation ventriculaire, une p\u00e9riode r\u00e9fractaire de 150 ms est d\u00e9clench\u00e9e dans les ventricules. Les 100 premi\u00e8res ms constituent une p\u00e9riode r\u00e9fractaire absolue et les 50 ms suivantes sont automatiquement red\u00e9clenchables. La valeur de cette p\u00e9riode n'est pas programmable.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1b83a01 elementor-widget elementor-widget-image\" data-id=\"1b83a01\" 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\/2025\/11\/pm_19_situations_periodes_refractaires_v_2.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_periodes_refractaires_v_2\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NDkxNywidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNVwvMTFcL3BtXzE5X3NpdHVhdGlvbnNfcGVyaW9kZXNfcmVmcmFjdGFpcmVzX3ZfMi5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"692\" height=\"412\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_periodes_refractaires_v_2.png\" class=\"attachment-large size-large wp-image-4917\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_periodes_refractaires_v_2.png 692w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_periodes_refractaires_v_2-300x179.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_periodes_refractaires_v_2-18x12.png 18w\" sizes=\"(max-width: 692px) 100vw, 692px\" \/>\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-8025665 elementor-widget elementor-widget-text-editor\" data-id=\"8025665\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>P\u00e9riodes r\u00e9fractaires ventriculaires apr\u00e8s stimulation auriculaire<\/strong><\/p><p>1. Blanchiment ventriculaire \u00e0 la suite d'une stimulation auriculaire<\/p><p>Apr\u00e8s la stimulation auriculaire, une p\u00e9riode r\u00e9fractaire absolue de 30 ms est d\u00e9clench\u00e9e dans les ventricules. Les 15 premi\u00e8res ms sont une p\u00e9riode r\u00e9fractaire absolue et les 15 ms suivantes peuvent \u00eatre automatiquement red\u00e9clench\u00e9es en cas de d\u00e9tection. La valeur de cette p\u00e9riode n'est pas programmable.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-727ccf5 elementor-widget elementor-widget-image\" data-id=\"727ccf5\" 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\/2025\/11\/pm_19_situations_periodes_refractaires_v_12.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_periodes_refractaires_v_12\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NDkxOCwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNVwvMTFcL3BtXzE5X3NpdHVhdGlvbnNfcGVyaW9kZXNfcmVmcmFjdGFpcmVzX3ZfMTIucG5nIn0%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"438\" height=\"408\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_periodes_refractaires_v_12.png\" class=\"attachment-large size-large wp-image-4918\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_periodes_refractaires_v_12.png 438w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_periodes_refractaires_v_12-300x279.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_periodes_refractaires_v_12-13x12.png 13w\" sizes=\"(max-width: 438px) 100vw, 438px\" \/>\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-a991416 elementor-widget elementor-widget-text-editor\" data-id=\"a991416\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>2. La fen\u00eatre de s\u00e9curit\u00e9<\/p><p>Apr\u00e8s la stimulation auriculaire, une p\u00e9riode r\u00e9fractaire relative de 95 ms est d\u00e9clench\u00e9e dans les ventricules. La valeur de cette p\u00e9riode ne peut pas \u00eatre programm\u00e9e. Elle ne prend effet qu'apr\u00e8s la fin du blanking ventriculaire suivant la stimulation auriculaire. Si la d\u00e9tection ventriculaire se produit entre la fin du blanking (ventriculaire suivant la stimulation auriculaire) et la fin de la fen\u00eatre de s\u00e9curit\u00e9, la stimulation ventriculaire est d\u00e9livr\u00e9e \u00e0 la fin de la fen\u00eatre de s\u00e9curit\u00e9.<\/p><p>Lorsque le mode de stimulation double chambre SafeR est programm\u00e9 et fonctionne en \u201cAAI\u201d (plus pr\u00e9cis\u00e9ment en ADI), les p\u00e9riodes r\u00e9fractaires sont celles d'un stimulateur double chambre. Des d\u00e9tections ventriculaires de \u201cdiaphonie AV\u201d ou de PVC dans la fen\u00eatre de s\u00e9curit\u00e9 peuvent se produire. Il n'y aura pas de stimulation ventriculaire \u00e0 la fin de la fen\u00eatre de s\u00e9curit\u00e9. Dans cette situation, l'algorithme SafeR consid\u00e8re donc ces d\u00e9tections dans la fen\u00eatre de s\u00e9curit\u00e9 comme une stimulation A bloqu\u00e9e (passage en DDD sur le crit\u00e8re Bloc AV III). Les d\u00e9tails du mode SafeR sont expliqu\u00e9s dans le chapitre sur la r\u00e9duction du taux de stimulation ventriculaire inutile.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-84a6bb3 elementor-widget elementor-widget-heading\" data-id=\"84a6bb3\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">La tachycardie r\u00e9entrante \u00e9lectronique (TRE)<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8d543c2 elementor-widget elementor-widget-text-editor\" data-id=\"8d543c2\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Pr\u00e9venir l'apparition des TMS<\/strong><\/p><p>Suite \u00e0 la d\u00e9tection d'une PVC, la p\u00e9riode r\u00e9fractaire auriculaire est \u00e9tendue \u00e0 500 ms (RetroPwatch). Ce RetroPwatch s'applique \u00e0 un maximum de 3 PVC successives. Les ondes P d\u00e9tect\u00e9es dans le RetroPwatch sont symbolis\u00e9es par un marqueur \u201cpetit p\u201d.<\/p><p>Le WARAD prot\u00e8ge \u00e9galement le dispositif contre la survenue d'une PMT en maintenant une longue p\u00e9riode r\u00e9fractaire auriculaire.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e8bcc1a elementor-widget elementor-widget-image\" data-id=\"e8bcc1a\" 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\/2025\/11\/pm_19_situations_tre_11.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_tre_11\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NDkxOSwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNVwvMTFcL3BtXzE5X3NpdHVhdGlvbnNfdHJlXzExLnBuZyJ9\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"538\" height=\"192\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_tre_11.png\" class=\"attachment-large size-large wp-image-4919\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_tre_11.png 538w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_tre_11-300x107.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_tre_11-18x6.png 18w\" sizes=\"(max-width: 538px) 100vw, 538px\" \/>\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-f876933 elementor-widget elementor-widget-text-editor\" data-id=\"f876933\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Diagnostic de la PMT par le stimulateur cardiaque<\/strong><\/p><p>L'algorithme \u201cAnti-PMT\u201d est toujours actif en mode de surveillance auriculaire (ne peut pas \u00eatre d\u00e9programm\u00e9).<\/p><p>Phase de d\u00e9tection initiale sur 8 cycles (analyse des 8 derniers cycles ventriculaires cons\u00e9cutifs (non glissants)) : l'appareil mesure le temps de conduction r\u00e9trograde (VP) et suspecte une TPM si les intervalles VP sont stables (dans les 30 ms) et courts (&lt; 470 ms).<\/p><p>Phase de confirmation sur 2 \u00e0 4 cycles : l'appareil module le d\u00e9lai AV (en raccourcissant le d\u00e9lai AV dans la plupart des cas) pour v\u00e9rifier la stabilit\u00e9 de l'intervalle VP (si c'est le cas, il conclut \u00e0 une PMT, sinon \u00e0 une tachycardie sinusale).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ee11a41 elementor-widget elementor-widget-image\" data-id=\"ee11a41\" 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\/2025\/11\/pm_19_situations_tre_13.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_tre_13\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NDkyMCwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNVwvMTFcL3BtXzE5X3NpdHVhdGlvbnNfdHJlXzEzLnBuZyJ9\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"695\" height=\"245\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_tre_13.png\" class=\"attachment-large size-large wp-image-4920\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_tre_13.png 695w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_tre_13-300x106.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_tre_13-18x6.png 18w\" sizes=\"(max-width: 695px) 100vw, 695px\" \/>\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-3ba549e elementor-widget elementor-widget-image\" data-id=\"3ba549e\" 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\/2025\/11\/pm_19_situations_tre_14.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_tre_14\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NDkyMSwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNVwvMTFcL3BtXzE5X3NpdHVhdGlvbnNfdHJlXzE0LnBuZyJ9\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"694\" height=\"288\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_tre_14.png\" class=\"attachment-large size-large wp-image-4921\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_tre_14.png 694w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_tre_14-300x124.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_tre_14-18x7.png 18w\" sizes=\"(max-width: 694px) 100vw, 694px\" \/>\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-96be439 elementor-widget elementor-widget-text-editor\" data-id=\"96be439\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Terminaison PMT<\/strong><\/p><p>Le principe de cet algorithme est de mettre fin \u00e0 une TPM en appliquant une p\u00e9riode r\u00e9fractaire auriculaire relative de 500 ms apr\u00e8s la stimulation ventriculaire de sorte que l'\u00e9v\u00e9nement auriculaire suivant soit d\u00e9tect\u00e9 au cours de cette p\u00e9riode r\u00e9fractaire. Cet \u00e9v\u00e9nement r\u00e9fractaire n'est pas synchronis\u00e9 avec le ventricule pendant un cycle et la tachycardie est interrompue.<\/p><p>Si l'option anti-PMT est programm\u00e9e sur \u201cReduct\u201d, l'appareil applique une p\u00e9riode r\u00e9fractaire auriculaire relative de 500 ms apr\u00e8s la stimulation ventriculaire en cas de PMT confirm\u00e9e.<\/p><p>Si l'option anti-PMT est programm\u00e9e sur \u201cReprog\u201d, l'appareil applique une p\u00e9riode r\u00e9fractaire auriculaire relative de 500 ms apr\u00e8s la stimulation ventriculaire en cas de PMT confirm\u00e9e et raccourcit automatiquement les d\u00e9lais AV de repos et d'effort de 15 ms (limit\u00e9s \u00e0 125 ms pour le d\u00e9lai AV de repos et \u00e0 80 ms pour le d\u00e9lai AV d'effort) afin de r\u00e9duire le risque de PMT (qui est favoris\u00e9 par des d\u00e9lais AV longs).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4506852 elementor-widget elementor-widget-image\" data-id=\"4506852\" 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\/2025\/11\/pm_19_situations_tre_15.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_tre_15\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NDkyMiwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNVwvMTFcL3BtXzE5X3NpdHVhdGlvbnNfdHJlXzE1LnBuZyJ9\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"705\" height=\"797\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_tre_15.png\" class=\"attachment-large size-large wp-image-4922\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_tre_15.png 705w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_tre_15-265x300.png 265w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_tre_15-11x12.png 11w\" sizes=\"(max-width: 705px) 100vw, 705px\" \/>\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-1bdceac elementor-widget elementor-widget-text-editor\" data-id=\"1bdceac\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Interrogation de la m\u00e9moire<\/strong><\/p><p>Dans l'onglet AIDA\/PM, vous pouvez trouver le nombre d'\u00e9pisodes PMT dans les donn\u00e9es statistiques. Le compteur est satur\u00e9 apr\u00e8s 255 \u00e9pisodes.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0cdfb1f elementor-widget elementor-widget-image\" data-id=\"0cdfb1f\" 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\/2025\/11\/pm_19_situations_tre_16.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_tre_16\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NDkyMywidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNVwvMTFcL3BtXzE5X3NpdHVhdGlvbnNfdHJlXzE2LnBuZyJ9\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"699\" height=\"545\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_tre_16.png\" class=\"attachment-large size-large wp-image-4923\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_tre_16.png 699w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_tre_16-300x234.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm_19_situations_tre_16-15x12.png 15w\" sizes=\"(max-width: 699px) 100vw, 699px\" \/>\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>Microport &#8211; AV delay, PMT, refractory periods Content Atrial refractory periods Blanking and post-atrial refractory period Following atrial detection, an 80 ms refractory period is triggered in the atrial chamber. The first 30 ms are an absolute refractory period and the following 50 ms can be automatically retriggered in the event of detection. The value [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"parent":53,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-3583","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>Microport CRM AV Delay PMT &amp; Refractory | Cardiocases<\/title>\n<meta name=\"description\" content=\"Microport CRM pacemaker AV delays, PMT prevention &amp; refractory periods \u2014 programming with ECG tracings.\" \/>\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\/devices-per-company\/microport-crm\/av-delay-pmt-refractory-periods-microport\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" 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