{"id":276,"date":"2025-07-10T10:23:41","date_gmt":"2025-07-10T10:23:41","guid":{"rendered":"https:\/\/cardiocases.com\/?page_id=276"},"modified":"2026-01-07T09:42:53","modified_gmt":"2026-01-07T09:42:53","slug":"ventricular-refractory-periods","status":"publish","type":"page","link":"https:\/\/cardiocases.com\/fr\/pacing-defibrillation\/basic-concepts\/pacemaker\/ventricular-refractory-periods\/","title":{"rendered":"Les p\u00e9riodes r\u00e9fractaires ventriculaires"},"content":{"rendered":"<div data-elementor-type=\"wp-page\" data-elementor-id=\"276\" class=\"elementor elementor-276\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1db144b e-con-full e-flex e-con e-parent\" data-id=\"1db144b\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ad20b15 elementor-widget elementor-widget-heading\" data-id=\"ad20b15\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Les p\u00e9riodes r\u00e9fractaires ventriculaires<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8fe55f5 elementor-toc--minimized-on-tablet elementor-widget elementor-widget-table-of-contents\" data-id=\"8fe55f5\" 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__8fe55f5\" 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__8fe55f5\" 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__8fe55f5\" 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-95a2e69 elementor-widget elementor-widget-heading\" data-id=\"95a2e69\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Informations g\u00e9n\u00e9rales<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a7bda30 elementor-widget elementor-widget-text-editor\" data-id=\"a7bda30\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Tout \u00e9v\u00e8nement d\u00e9tect\u00e9 ou stimul\u00e9 dans le ventricule d\u00e9clenche une p\u00e9riode de blanking ventriculaire.<\/p><p>Cette p\u00e9riode r\u00e9fractaire ventriculaire (PRV) est destin\u00e9e \u00e0 emp\u00eacher le double comptage de l\u2019onde R et\/ou la d\u00e9tection de l\u2019onde T.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4866719 elementor-widget elementor-widget-text-editor\" data-id=\"4866719\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6>Le blanking ventriculaire post-stimulation atriale<\/h6><p>Cette p\u00e9riode de blanking ventriculaire programmable est d\u00e9clench\u00e9e apr\u00e8s un stimulus atrial.<\/p><p>Cette p\u00e9riode est destin\u00e9e \u00e0 \u00e9viter la d\u00e9tection du stimulus atrial par la chaine de d\u00e9tection ventriculaire qui entra\u00eenerait une inhibition ventriculaire.<\/p><p>La p\u00e9riode de blanking ventriculaire, qui suit une stimulation atriale est programmable (en fonction des compagnies) lorsque le stimulateur fonctionne en modes DDD, DDI et DVI.<\/p><p>Un signal ventriculaire survenant durant le blanking ventriculaire post-stimulation atriale n'est pas d\u00e9tect\u00e9 avec stimulation ventriculaire en fin du d\u00e9lai AV programm\u00e9.<\/p><p>Ce blanking est habituellement programm\u00e9 relativement court (entre 20 et 40 ms).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d941d26 elementor-widget elementor-widget-image\" data-id=\"d941d26\" 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_periodes_refractaires_v_3.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_periodes_refractaires_v_3\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjgyNCwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfcGVyaW9kZXNfcmVmcmFjdGFpcmVzX3ZfMy5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"589\" height=\"259\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_3.png\" class=\"attachment-large size-large wp-image-6824\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_3.png 589w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_3-300x132.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_3-18x8.png 18w\" sizes=\"(max-width: 589px) 100vw, 589px\" \/>\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-08d2264 elementor-widget elementor-widget-text-editor\" data-id=\"08d2264\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6>La fen\u00eatre de s\u00e9curit\u00e9<\/h6><p>La fen\u00eatre de s\u00e9curit\u00e9 est une p\u00e9riode de d\u00e9tection ventriculaire compl\u00e9mentaire du blanking ventriculaire post-atrial. Elle est mise en route (en fonction des constructeurs) seulement apr\u00e8s stimulation atriale et est con\u00e7ue pour emp\u00eacher une asystolie ventriculaire due \u00e0 une inhibition inappropri\u00e9e de la stimulation ventriculaire par d\u00e9tection du stimulus ou de la d\u00e9polarisation atriale.<\/p><p>La fonction est disponible lorsque le stimulateur fonctionne en modes DDD, DDI, et DVI.<\/p><p>Une d\u00e9tection ventriculaire dans un d\u00e9lai variable en fonction des constructeurs apr\u00e8s une stimulation atriale est consid\u00e9r\u00e9e comme non physiologique et provoque une stimulation ventriculaire en fin de fen\u00eatre de s\u00e9curit\u00e9.<\/p><p>L\u2019aspect de d\u00e9lai AV court permet de reconna\u00eetre une stimulation en fen\u00eatre de s\u00e9curit\u00e9 sur l\u2019\u00e9lectrocardiogramme.<\/p><p>Si l\u2019\u00e9v\u00e8nement d\u00e9tect\u00e9 dans la fen\u00eatre de s\u00e9curit\u00e9 est le r\u00e9sultat d\u2019une \u00e9coute crois\u00e9e ou d\u2019un bruit surd\u00e9tect\u00e9, l\u2019impulsion de stimulation permet une capture ventriculaire effective en fin de fen\u00eatre de s\u00e9curit\u00e9.<\/p><p>Si l\u2019\u00e9v\u00e8nement d\u00e9tect\u00e9 dans la fen\u00eatre de s\u00e9curit\u00e9 correspond \u00e0 une extrasystole ventriculaire tardive ou \u00e0 une conduction atrio-ventriculaire, la stimulation en fin de fen\u00eatre de s\u00e9curit\u00e9 survient suffisamment t\u00f4t dans la p\u00e9riode r\u00e9fractaire ventriculaire myocardique absolue permettant d\u2019\u00e9viter une stimulation sur le sommet de l\u2019onde T.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cd9e8b2 elementor-widget elementor-widget-image\" data-id=\"cd9e8b2\" 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_periodes_refractaires_v_4.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_periodes_refractaires_v_4\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjgyMywidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfcGVyaW9kZXNfcmVmcmFjdGFpcmVzX3ZfNC5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"694\" height=\"363\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_4.png\" class=\"attachment-large size-large wp-image-6823\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_4.png 694w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_4-300x157.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_4-18x9.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-27aca67 elementor-widget elementor-widget-heading\" data-id=\"27aca67\" 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-da438f9 elementor-widget elementor-widget-heading\" data-id=\"da438f9\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">1. Blocage et p\u00e9riodes r\u00e9fractaires ventriculaires post-ventriculaires<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0af30b6 elementor-widget elementor-widget-heading\" data-id=\"0af30b6\" 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-063296c elementor-widget elementor-widget-text-editor\" data-id=\"063296c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Apr\u00e8s une stimulation ventriculaire, il existe une p\u00e9riode r\u00e9fractaire ventriculaire programmable (entre 125 et 470 ms, valeur nominale 250 ms).<\/p><p>De m\u00eame, il existe une p\u00e9riode r\u00e9fractaire ventriculaire post-d\u00e9tection programmable (entre 125 et 500 ms, valeur nominale 250 ms).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-99a15d9 elementor-widget elementor-widget-heading\" data-id=\"99a15d9\" 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-1310569 elementor-widget elementor-widget-text-editor\" data-id=\"1310569\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Tout \u00e9v\u00e8nement d\u00e9tect\u00e9 (VS ou extrasystole) ou stimul\u00e9 dans le ventricule d\u00e9clenche une p\u00e9riode r\u00e9fractaire ventriculaire (PRV) programmable.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7be4648 elementor-widget elementor-widget-image\" data-id=\"7be4648\" 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_periodes_refractaires_v_1.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_periodes_refractaires_v_1\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjgyMiwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfcGVyaW9kZXNfcmVmcmFjdGFpcmVzX3ZfMS5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"542\" height=\"436\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_1.png\" class=\"attachment-large size-large wp-image-6822\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_1.png 542w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_1-300x241.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_1-15x12.png 15w\" sizes=\"(max-width: 542px) 100vw, 542px\" \/>\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-fe7ff53 elementor-widget elementor-widget-heading\" data-id=\"fe7ff53\" 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-eaff93a elementor-widget elementor-widget-text-editor\" data-id=\"eaff93a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Apr\u00e8s une d\u00e9tection ventriculaire: tout \u00e9v\u00e8nement d\u00e9tect\u00e9 dans le ventricule d\u00e9clenche une p\u00e9riode r\u00e9fractaire ventriculaire de 135 ms d\u00e9compos\u00e9e en 50 ms de p\u00e9riode r\u00e9fractaire absolue, 40 ms de fen\u00eatre de bruit et 45 ms de p\u00e9riode r\u00e9fractaire absolue.<\/p><p>Apr\u00e8s une stimulation ventriculaire : un \u00e9v\u00e8nement stimul\u00e9 dans le ventricule d\u00e9clenche une p\u00e9riode r\u00e9fractaire ventriculaire d\u00e9compos\u00e9e en une p\u00e9riode r\u00e9fractaire fixe suivie par une p\u00e9riode de bruit de 40 ms. Ce param\u00e8tre peut \u00eatre programm\u00e9 sur dynamique (diminution de la p\u00e9riode r\u00e9fractaire fixe en rapport \u00e0 une augmentation de la fr\u00e9quence cardiaque).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-30052a8 elementor-widget elementor-widget-heading\" data-id=\"30052a8\" 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-75e5d78 elementor-widget elementor-widget-text-editor\" data-id=\"75e5d78\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6>Sur les stimulateurs plus anciens (jusque l\u2019Adapta)<\/h6><p>Tout \u00e9v\u00e8nement d\u00e9tect\u00e9 ou stimul\u00e9 dans le ventricule d\u00e9clenche une p\u00e9riode de blanking absolue non programmable. La dur\u00e9e r\u00e9elle de cette p\u00e9riode de blanking est d\u00e9termin\u00e9e de fa\u00e7on dynamique par le stimulateur, en fonction de l\u2019amplitude et de la dur\u00e9e du signal (50 \u00e0 100 ms). Chaque \u00e9v\u00e8nement d\u00e9tect\u00e9 ou stimul\u00e9 dans le ventricule d\u00e9clenche \u00e9galement une p\u00e9riode r\u00e9fractaire relative. Celle-ci est programmable (150 \u00e0 500 ms ; 230 ms en nominal).<\/p><h6>Sur les stimulateurs plus r\u00e9cents (Ensura, Advisa et \u00e0 venir\u2026)<\/h6><p>Il existe un blanking ventriculaire post stimulation ventriculaire qui est programmable (150 \u00e0 320 ms ; 200 ms en nominal) ainsi qu\u2019un blanking ventriculaire post d\u00e9tection ventriculaire \u00e9galement programmable (120 \u00e0 320 ms ; 120 ms en nominal).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-eab9fc2 elementor-widget elementor-widget-heading\" data-id=\"eab9fc2\" 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-525946f elementor-widget elementor-widget-text-editor\" data-id=\"525946f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Suite \u00e0 une d\u00e9tection ventriculaire, une p\u00e9riode r\u00e9fractaire de 100 ms est d\u00e9clench\u00e9e \u00e0 l\u2019\u00e9tage ventriculaire. Les 50 premi\u00e8res ms sont une p\u00e9riode r\u00e9fractaire absolue et les 50 ms suivantes sont red\u00e9clenchables automatiquement. La valeur de cette p\u00e9riode n\u2019est pas programmable.ble.<\/p><p>Suite \u00e0 une stimulation ventriculaire, une p\u00e9riode r\u00e9fractaire de 150 ms est d\u00e9clench\u00e9e \u00e0 l\u2019\u00e9tage ventriculaire. Les 100 premi\u00e8res ms sont une p\u00e9riode r\u00e9fractaire absolue et les 50 ms suivantes sont red\u00e9clenchables automatiquement. La valeur de cette p\u00e9riode n\u2019est pas programmable.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-dc743ce elementor-widget elementor-widget-image\" data-id=\"dc743ce\" 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_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%3DeyJpZCI6NjgyMSwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfcGVyaW9kZXNfcmVmcmFjdGFpcmVzX3ZfMi5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"692\" height=\"412\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_2.png\" class=\"attachment-large size-large wp-image-6821\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_2.png 692w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_2-300x179.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/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-554cb4a elementor-widget elementor-widget-heading\" data-id=\"554cb4a\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">2. Les p\u00e9riodes r\u00e9fractaires ventriculaires post-stimulation atriale<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-66527e1 elementor-widget elementor-widget-text-editor\" data-id=\"66527e1\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ol><li>Le blanking ventriculaire post stimulation atriale n'est pas programmable pour les stimulateurs Medtronic et Microport CRM-Sorin.in.<\/li><li>Le blanking ventriculaire post stimulation atriale est programmable pour les stimulateurs Biotronik, Boston Scientific et Abbott.<\/li><li>Il n'y a pas de fen\u00eatre de s\u00e9curit\u00e9 dans les stimulateurs Boston Scientific (protection r\u00e9alis\u00e9e \u00e0 l'aide d'une fen\u00eatre de bruit red\u00e9clenchable: si d\u00e9tection en fen\u00eatre de bruit, pas d'inhibition et stimulation \u00e0 la fin du d\u00e9lai AV programm\u00e9).<\/li><li>La fen\u00eatre de s\u00e9curit\u00e9 est courte pour les stimulateurs Abbott (64 ms apr\u00e8s stimulation atriale, mais si d\u00e9tection dans cette fen\u00eatre, stimulation apr\u00e8s 120 ms).<\/li><li>La fen\u00eatre de s\u00e9curit\u00e9 dure entre 95 et 110 ms pour les stimulateurs Biotronik (100 ms), Medtronic (110 ms) et Microport CRM-Sorin (95 ms) avec stimulation en fin de fen\u00eatre si d\u00e9tection.<\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a4a4c07 elementor-widget elementor-widget-heading\" data-id=\"a4a4c07\" 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-8970834 elementor-widget elementor-widget-text-editor\" data-id=\"8970834\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6>Le blanking ventriculaire post-stimulation atriale<\/h6><p>Ce blanking est programmable sur AUTO (depuis la plateforme Accent en valeur nominale) ou sur une valeur fixe entre 12 et 52 ms. Quand la programmation AUTO est choisie, si un signal ventriculaire est d\u00e9tect\u00e9 pendant le blanking, le blanking est automatiquement allong\u00e9 jusqu\u2019\u00e0 ce qu\u2019aucun signal ne soit plus d\u00e9tect\u00e9 ou jusqu\u2019\u00e0 la valeur limite de 52 ms.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8e678b0 elementor-widget elementor-widget-image\" data-id=\"8e678b0\" 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_periodes_refractaires_v_9-1.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_periodes_refractaires_v_9 (1)\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjgxNiwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfcGVyaW9kZXNfcmVmcmFjdGFpcmVzX3ZfOS0xLnBuZyJ9\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"539\" height=\"247\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_9-1.png\" class=\"attachment-large size-large wp-image-6816\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_9-1.png 539w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_9-1-300x137.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_9-1-18x8.png 18w\" sizes=\"(max-width: 539px) 100vw, 539px\" \/>\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-08946fb elementor-widget elementor-widget-text-editor\" data-id=\"08946fb\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6>Stimulation ventriculaire de s\u00e9curit\u00e9<\/h6><p>La fen\u00eatre de s\u00e9curit\u00e9 peut \u00eatre programm\u00e9e sur marche ou arr\u00eat (valeur nominale marche). Si un signal ventriculaire est d\u00e9tect\u00e9 dans la fen\u00eatre de s\u00e9curit\u00e9 (d\u00e9bute apr\u00e8s le blanking ventriculaire post-stimulation atriale et se termine 64 ms apr\u00e8s le stimulus atrial), une stimulation ventriculaire est d\u00e9clench\u00e9e 120 ms apr\u00e8s la stimulation atriale.<\/p><p>Si le blanking ventriculaire post-stimulation atriale est programm\u00e9 sur \u00ab Auto \u00bb:<\/p><ul><li>si un signal ventriculaire est d\u00e9tect\u00e9 pendant le blanking initial de 12 ms (possible \u00e9coute crois\u00e9e), de nouvelles p\u00e9riodes de blanking red\u00e9clenchables de 12 ms se succ\u00e8dent jusqu\u2019\u00e0 l\u2019arr\u00eat de la d\u00e9tection sans d\u00e9passer une limite fix\u00e9e \u00e0 52 ms;<\/li><li>si la d\u00e9tection ventriculaire se termine avant cette limite de 52 ms, la fen\u00eatre d\u2019\u00e9coute crois\u00e9e est interrompue; si une d\u00e9tection ventriculaire survient avant la fin du d\u00e9lai AV, la stimulation ventriculaire est inhib\u00e9e; si aucune d\u00e9tection ne survient, la stimulation ventriculaire survient en fin de d\u00e9lai AV;<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a103e9f elementor-widget elementor-widget-image\" data-id=\"a103e9f\" 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_periodes_refractaires_v_10-1.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_periodes_refractaires_v_10 (1)\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjgxNSwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfcGVyaW9kZXNfcmVmcmFjdGFpcmVzX3ZfMTAtMS5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"555\" height=\"238\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_10-1.png\" class=\"attachment-large size-large wp-image-6815\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_10-1.png 555w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_10-1-300x129.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_10-1-18x8.png 18w\" sizes=\"(max-width: 555px) 100vw, 555px\" \/>\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-a8ea7d7 elementor-widget elementor-widget-text-editor\" data-id=\"a8ea7d7\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul><li>si la d\u00e9tection ventriculaire se poursuit au del\u00e0 de cette limite de 52 ms (d\u00e9but de la fen\u00eatre de s\u00e9curit\u00e9), une stimulation ventriculaire est d\u00e9livr\u00e9e 120 ms apr\u00e8s la stimulation atriale;<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a931398 elementor-widget elementor-widget-image\" data-id=\"a931398\" 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_periodes_refractaires_v_11-1.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_periodes_refractaires_v_11 (1)\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjgxNCwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfcGVyaW9kZXNfcmVmcmFjdGFpcmVzX3ZfMTEtMS5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"555\" height=\"252\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_11-1.png\" class=\"attachment-large size-large wp-image-6814\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_11-1.png 555w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_11-1-300x136.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_11-1-18x8.png 18w\" sizes=\"(max-width: 555px) 100vw, 555px\" \/>\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-d786bcd elementor-widget elementor-widget-heading\" data-id=\"d786bcd\" 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-7c96983 elementor-widget elementor-widget-text-editor\" data-id=\"7c96983\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6>Le blanking ventriculaire post-stimulation atriale<\/h6><p>Ce blanking est programmable entre 30 et 70 ms (valeur nominale 30 ms).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6afc8c5 elementor-widget elementor-widget-image\" data-id=\"6afc8c5\" 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_periodes_refractaires_v_5.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_periodes_refractaires_v_5\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjgyMCwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfcGVyaW9kZXNfcmVmcmFjdGFpcmVzX3ZfNS5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"466\" height=\"369\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_5.png\" class=\"attachment-large size-large wp-image-6820\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_5.png 466w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_5-300x238.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_5-15x12.png 15w\" sizes=\"(max-width: 466px) 100vw, 466px\" \/>\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-793122f elementor-widget elementor-widget-text-editor\" data-id=\"793122f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6>La fen\u00eatre de s\u00e9curit\u00e9<\/h6><p>Apr\u00e8s une stimulation atriale et la p\u00e9riode de blanking ventriculaire (programmable entre 30 et 70 ms) d\u00e9bute la fen\u00eatre de s\u00e9curit\u00e9 d'une dur\u00e9e non programmable (elle dure depuis la fin du blanking ventriculaire jusqu'\u00e0 100 ms apr\u00e8s la stimulation atriale). Une d\u00e9tection ventriculaire dans cette fen\u00eatre de s\u00e9curit\u00e9 provoque une stimulation ventriculaire \u00e0 la fin de cette fen\u00eatre (100 ms apr\u00e8s la stimulation atriale).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f000a18 elementor-widget elementor-widget-heading\" data-id=\"f000a18\" 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-acb372f elementor-widget elementor-widget-text-editor\" data-id=\"acb372f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6>Le blanking ventriculaire post-stimulation atriale<\/h6><p>Ce blanking est programmable entre 45 et 85 ms (valeur nominale de 65 ms, les 40 derni\u00e8res millisecondes \u00e9tant la fen\u00eatre de bruit<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5010045 elementor-widget elementor-widget-image\" data-id=\"5010045\" 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_periodes_refractaires_v_6-1.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_periodes_refractaires_v_6 (1)\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjgxOSwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfcGVyaW9kZXNfcmVmcmFjdGFpcmVzX3ZfNi0xLnBuZyJ9\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"332\" height=\"109\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_6-1.png\" class=\"attachment-large size-large wp-image-6819\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_6-1.png 332w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_6-1-300x98.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_6-1-18x6.png 18w\" sizes=\"(max-width: 332px) 100vw, 332px\" \/>\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-18c5681 elementor-widget elementor-widget-text-editor\" data-id=\"18c5681\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6>La fen\u00eatre de s\u00e9curit\u00e9 et fen\u00eatre de bruit<\/h6><p>Il n\u2019existe pas de fen\u00eatre de s\u00e9curit\u00e9 sur les stimulateurs Boston Scientific.<\/p><p>Il existe en revanche une fen\u00eatre de bruit qui constitue une portion des diff\u00e9rents blankings ou p\u00e9riodes r\u00e9fractaires. Quand un signal tombe dans la fen\u00eatre de bruit, il n\u2019est pas utilis\u00e9 pour la d\u00e9tection et ne recycle pas les intervalles d\u2019\u00e9chappement.<\/p><p>Si  le signal est d\u00e9tect\u00e9 de fa\u00e7on continue, cette fen\u00eatre de bruit est syst\u00e9matiquement re-d\u00e9clench\u00e9e (re-trigg\u00e9e) aussi longtemps que le signal est pr\u00e9sent (ou jusqu\u2019\u00e0 la prochaine stimulation).<\/p><p>Ce d\u00e9parasitage est programmable entre 45 et 85 ms (valeur nominale 65 ms, les 40 derni\u00e8res millisecondes \u00e9tant la fen\u00eatre de bruit).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7cf6d17 elementor-widget elementor-widget-image\" data-id=\"7cf6d17\" 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_periodes_refractaires_v_7-1.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_periodes_refractaires_v_7 (1)\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjgxOCwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfcGVyaW9kZXNfcmVmcmFjdGFpcmVzX3ZfNy0xLnBuZyJ9\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"671\" height=\"264\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_7-1.png\" class=\"attachment-large size-large wp-image-6818\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_7-1.png 671w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_7-1-300x118.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_7-1-18x7.png 18w\" sizes=\"(max-width: 671px) 100vw, 671px\" \/>\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-aae46df elementor-widget elementor-widget-heading\" data-id=\"aae46df\" 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-aa98c81 elementor-widget elementor-widget-text-editor\" data-id=\"aa98c81\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6>Le blanking ventriculaire post-stimulation atriale<\/h6><p>Ce blanking est non programmable (30 ms si stimulation atriale bipolaire et 40 ms si stimulation unipolaire).<\/p><h6>La fen\u00eatre de s\u00e9curit\u00e9<\/h6><p>Une d\u00e9tection ventriculaire dans un d\u00e9lai de 110 ms apr\u00e8s une stimulation provoque une stimulation ventriculaire \u00e0 110 ms ou \u00e0 la fin du d\u00e9lai AV stimul\u00e9, si celui-ci est inf\u00e9rieur \u00e0 110 ms.<\/p><p>Les 2 annotations VP et VS apparaissent sur le moniteur de rythme en temps r\u00e9el, sur les trac\u00e9s gel\u00e9s et sur les trac\u00e9s gel\u00e9s imprim\u00e9s.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1e7657f elementor-widget elementor-widget-image\" data-id=\"1e7657f\" 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_periodes_refractaires_v_8.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_periodes_refractaires_v_8\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjgxNywidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfcGVyaW9kZXNfcmVmcmFjdGFpcmVzX3ZfOC5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"505\" height=\"304\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_8.png\" class=\"attachment-large size-large wp-image-6817\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_8.png 505w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_8-300x181.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_8-18x12.png 18w\" sizes=\"(max-width: 505px) 100vw, 505px\" \/>\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-7e87d2a elementor-widget elementor-widget-heading\" data-id=\"7e87d2a\" 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-fdf92f5 elementor-widget elementor-widget-text-editor\" data-id=\"fdf92f5\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6>Le blanking ventriculaire post-stimulation atriale<\/h6><p>Suite \u00e0 une stimulation atriale, une p\u00e9riode r\u00e9fractaire absolue de 30 ms est d\u00e9clench\u00e9e \u00e0 l\u2019\u00e9tage ventriculaire. Les 15 premi\u00e8res ms sont une p\u00e9riode r\u00e9fractaire absolue et les 15 ms suivantes sont red\u00e9clenchables automatiquement en cas de d\u00e9tection. La valeur de cette p\u00e9riode n\u2019est pas programmable.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6e541a1 elementor-widget elementor-widget-image\" data-id=\"6e541a1\" 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_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%3DeyJpZCI6NjgxMywidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfcGVyaW9kZXNfcmVmcmFjdGFpcmVzX3ZfMTIucG5nIn0%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\/2026\/01\/pm_19_situations_periodes_refractaires_v_12.png\" class=\"attachment-large size-large wp-image-6813\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_12.png 438w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_12-300x279.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/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-a38db8e elementor-widget elementor-widget-text-editor\" data-id=\"a38db8e\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6>La fen\u00eatre de s\u00e9curit\u00e9<\/h6><p>Suite \u00e0 une stimulation atriale, une p\u00e9riode r\u00e9fractaire relative de 95 ms est d\u00e9clench\u00e9e \u00e0 l\u2019\u00e9tage ventriculaire. La valeur de cette p\u00e9riode n\u2019est pas programmable. Elle n\u2019est effective qu\u2019apr\u00e8s la fin du blanking ventriculaire post-stimulation atriale. Si une d\u00e9tection ventriculaire a lieu entre la fin du blanking (ventriculaire post-stimulation atriale) et la fin de la fen\u00eatre de s\u00e9curit\u00e9 alors une stimulation ventriculaire est d\u00e9livr\u00e9e en fin de fen\u00eatre de s\u00e9curit<\/p><p>Lorsque le mode de stimulation double chambre SafeR est programm\u00e9 et qu\u2019il fonctionne en \"AAI\" (plus exactement en ADI), les p\u00e9riodes r\u00e9fractaire sont celles d\u2019un stimulateur double chambre. Des d\u00e9tections ventriculaires de \"cross-talk AV\" ou d\u2019ESV en fen\u00eatre de s\u00e9curit\u00e9 peuvent avoir lieu. Il n\u2019y aura pas de stimulation ventriculaire en fin de fen\u00eatre de s\u00e9curit\u00e9. Dans cette situation, l\u2019algorithme SafeR consid\u00e8re donc ces d\u00e9tections en fen\u00eatre de s\u00e9curit\u00e9 comme \u00e9tant des stimulations A bloqu\u00e9es (commutation en DDD sur crit\u00e8re de BAV III). Le d\u00e9tail du mode safeR est expliqu\u00e9 dans le chapitre sur la r\u00e9duction du taux de stimulation ventriculaire inutile. <a href=\"\/fr\/pacing-modes-microport\/\">Modes de Stimulation<\/a>.<\/p>\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>Ventricular refractory periods Content General information Any event detected or stimulated in the ventricle triggers a ventricular blanking period. This ventricular refractory period (VRP) is designed to prevent double counting of the R wave and\/or detection of the T wave. Ventricular blanking after atrial stimulation This programmable ventricular blanking period is triggered after an atrial [&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-276","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 Ventricular Refractory Periods | Cardiocases<\/title>\n<meta name=\"description\" content=\"Pacemaker ventricular refractory periods \u2014 VRP, PVARP, cross-talk prevention &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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