{"id":3618,"date":"2025-10-08T18:51:08","date_gmt":"2025-10-08T18:51:08","guid":{"rendered":"https:\/\/cardiocases.com\/?page_id=3618"},"modified":"2026-07-06T12:33:53","modified_gmt":"2026-07-06T12:33:53","slug":"av-delay-pmt-refractory-periods-abbott","status":"publish","type":"page","link":"https:\/\/cardiocases.com\/fr\/pacing-defibrillation\/devices-per-company\/abbott\/av-delay-pmt-refractory-periods-abbott\/","title":{"rendered":"AV delay, PMT, refractory periods Abbott"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"3618\" class=\"elementor elementor-3618\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1c0397c e-con-full e-flex e-con e-parent\" data-id=\"1c0397c\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b5e3020 elementor-widget elementor-widget-heading\" data-id=\"b5e3020\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Abbott - AV delay, PMT, refractory periods<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3b030b2 elementor-toc--minimized-on-tablet elementor-widget elementor-widget-table-of-contents\" data-id=\"3b030b2\" data-element_type=\"widget\" data-e-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\tContent\t\t\t<\/h4>\n\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--expand\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__3b030b2\" 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__3b030b2\" 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__3b030b2\" 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-b81a926 elementor-widget elementor-widget-heading\" data-id=\"b81a926\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Atrial refractory period<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6993ec7 elementor-widget elementor-widget-text-editor\" data-id=\"6993ec7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>\u00a0<\/p><p><strong>Blanking and post-atrial refractory period<\/strong><\/p><p>There is a programmable post-atrial detection refractory period (between 93 and 190 ms, nominal value 93 ms).<\/p><p>Similarly, after atrial pacing, there is a programmable atrial refractory period (between 190 and 470 ms, nominal value 190 ms).Events occurring during this refractory period are not taken into account for the counting of atrial arrhythmias (calculation of the filtered atrial rate).<\/p><p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-medium wp-image-11209\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/07\/Periode-refractaire-atriales-abbott-300x173.png\" alt=\"\" width=\"300\" height=\"173\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/07\/Periode-refractaire-atriales-abbott-300x173.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/07\/Periode-refractaire-atriales-abbott-18x10.png 18w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/07\/Periode-refractaire-atriales-abbott.png 523w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p><p><\/p><p><\/p><p><\/p><p><strong>Le blanking atrial post-ventriculaire<\/strong> <br \/>Il s\u2019agit d\u2019une p\u00e9riode r\u00e9fractaire absolue appliqu\u00e9e dans l\u2019oreillette apr\u00e8s un \u00e9v\u00e9nement <br \/>ventriculaire d\u00e9tect\u00e9 ou stimul\u00e9, afin d\u2019emp\u00eacher que des ondes R ne soient d\u00e9tect\u00e9es.<\/p><ul><li>\u00e0 la suite d\u2019une stimulation ventriculaire, il existe un blanking atrial de 60 \u00e0 250 ms (valeur nominale, 150 ms)<\/li><li>\u00a0les \u00e9v\u00e9nements qui se produisent pendant cette p\u00e9riode r\u00e9fractaire ne sont pas pris en compte pour le d\u00e9compte des arythmies atriales (calcul de la fr\u00e9quence atriale filtr\u00e9e)<\/li><\/ul><p>\u00a0<\/p><p><strong>La p\u00e9riode r\u00e9fractaire atriale post\u0002ventriculaire (PRAPV)<\/strong><\/p><ul><li>\u00a0la PRAPV est programmable entre 125 et 500 ms (valeur nominale 275 ms)<\/li><\/ul><p>\u00a0<\/p><p><strong>PVARP dynamique<\/strong> <br \/>La programmation d\u2019une PRAPV dynamique permet d\u2019adapter la valeur de la PRAPV en fonction de la <br \/>fr\u00e9quence cardiaque :<\/p><ul><li>\u00a0il est possible de programmer ce <br \/>param\u00e8tre sur Arr\u00eat, Faible, Moyen, Elev\u00e9<\/li><li>\u00a0il faut \u00e9galement programmer une PRAPV la plus courte <br \/>(programmable entre 125 et 475 ms, valeur nominale 175 ms)<\/li><\/ul><p><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-638fa0c elementor-widget elementor-widget-image\" data-id=\"638fa0c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"http:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_14.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_periodes_refractaires_14\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjU2MCwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfcGVyaW9kZXNfcmVmcmFjdGFpcmVzXzE0LnBuZyJ9\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"506\" height=\"228\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_14.png\" class=\"attachment-large size-large wp-image-6560\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_14.png 506w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_14-300x135.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_14-18x8.png 18w\" sizes=\"(max-width: 506px) 100vw, 506px\" \/>\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-023e2a0 elementor-widget elementor-widget-text-editor\" data-id=\"023e2a0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-88d919f elementor-widget elementor-widget-image\" data-id=\"88d919f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"http:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_15.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_periodes_refractaires_15\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjU1OSwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfcGVyaW9kZXNfcmVmcmFjdGFpcmVzXzE1LnBuZyJ9\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"503\" height=\"322\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_15.png\" class=\"attachment-large size-large wp-image-6559\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_15.png 503w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_15-300x192.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_15-18x12.png 18w\" sizes=\"(max-width: 503px) 100vw, 503px\" \/>\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-89ffe61 elementor-widget elementor-widget-heading\" data-id=\"89ffe61\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Ventricular refractory period<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7933189 elementor-widget elementor-widget-text-editor\" data-id=\"7933189\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Blanking and post-ventricular ventricular refractory period<\/strong><\/p><p>After ventricular pacing, there is a programmable ventricular refractory period (between 125 and 470 ms, nominal value 250 ms).<\/p><p>Similarly, there is a programmable post-detection ventricular refractory period (between 125 and 500 ms, nominal value 250 ms).<\/p><p><strong>Post-atrial stimulation ventricular refractory periods<\/strong><\/p><p>1. Post-atrial stimulation ventricular blanking<\/p><p>This blanking can be programmed to AUTO (from the Accent platform at nominal value) or to a fixed value between 12 and 52 ms. When AUTO programming is selected, if a ventricular signal is detected during blanking, blanking is automatically extended until no signal is detected or until the limit value of 52 ms is reached.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-242db93 elementor-widget elementor-widget-image\" data-id=\"242db93\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"http:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_9.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_periodes_refractaires_v_9\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjU1OCwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfcGVyaW9kZXNfcmVmcmFjdGFpcmVzX3ZfOS5wbmcifQ%3D%3D\">\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.png\" class=\"attachment-large size-large wp-image-6558\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_9.png 539w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_9-300x137.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_9-18x8.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-3434d10 elementor-widget elementor-widget-text-editor\" data-id=\"3434d10\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>2. Ventricular safety pacing<\/p><p>The safety window can be programmed to be on or off (default setting is on). If a ventricular signal is detected within the safety window (which begins after ventricular blanking following atrial pacing and ends 64 ms after the atrial stimulus), ventricular pacing is triggered 120 ms after atrial pacing.<\/p><p>If post-atrial ventricular blanking is programmed to \u201cAuto\u201d:<\/p><ul><li>if a ventricular signal is detected during the initial 12 ms blanking period (possible cross-listening), new 12 ms re-triggerable blanking periods follow one another until detection stops, without exceeding a limit set at 52 ms;<\/li><li>if ventricular detection ends before this 52 ms limit, the cross-listening window is interrupted; if ventricular detection occurs before the end of the AV delay, ventricular pacing is inhibited; if no detection occurs, ventricular pacing occurs at the end of the AV delay;\u00a0<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-db2d914 elementor-widget elementor-widget-image\" data-id=\"db2d914\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"http:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_10.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_periodes_refractaires_v_10\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjU1NywidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfcGVyaW9kZXNfcmVmcmFjdGFpcmVzX3ZfMTAucG5nIn0%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.png\" class=\"attachment-large size-large wp-image-6557\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_10.png 555w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_10-300x129.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_10-18x8.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-6a087dd elementor-widget elementor-widget-text-editor\" data-id=\"6a087dd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul><li>if ventricular detection continues beyond this 52 ms limit (start of the safety window), ventricular pacing is delivered 120 ms after atrial pacing;<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-eab7c9a elementor-widget elementor-widget-image\" data-id=\"eab7c9a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"http:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_11.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_periodes_refractaires_v_11\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjU1NiwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfcGVyaW9kZXNfcmVmcmFjdGFpcmVzX3ZfMTEucG5nIn0%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.png\" class=\"attachment-large size-large wp-image-6556\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_11.png 555w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_11-300x136.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_periodes_refractaires_v_11-18x8.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-cd38df9 elementor-widget elementor-widget-heading\" data-id=\"cd38df9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Pacemaker mediated tachycardia<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a01da07 elementor-widget elementor-widget-text-editor\" data-id=\"a01da07\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Preventing PMT initiation<\/strong><\/p><p>To avoid stimulating the atrium during vulnerable periods, Abbott pacemakers maintain a fixed interval of 330 ms before stimulating the atrium, regardless of the programmed or servo frequency.<\/p><p>If the Response on PVC setting is set to Stim. A (other setting: Off), detection of a PVC causes the PVARP to be extended to 475 ms. Atrial pacing can only occur 330 ms after detection of atrial activity in the PVARP.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ff77454 elementor-widget elementor-widget-image\" data-id=\"ff77454\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"http:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_tre_8.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_tre_8\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjU1NSwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfdHJlXzgucG5nIn0%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"693\" height=\"329\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_tre_8.png\" class=\"attachment-large size-large wp-image-6555\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_tre_8.png 693w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_tre_8-300x142.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_tre_8-18x9.png 18w\" sizes=\"(max-width: 693px) 100vw, 693px\" \/>\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-44391fc elementor-widget elementor-widget-text-editor\" data-id=\"44391fc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Diagnosis of a PMT by the pacemaker and anti-PMT intervention<\/strong><\/p><p>To prevent a PMT from becoming permanent, Abbott pacemakers have a recognition and treatment algorithm based on the stability of the VP interval.<\/p><p>There are three possible settings for the response to PMT:<\/p><ul><li>Off: no PMT detected;<\/li><li>Passive: PMTs are detected and included in the diagnostics, but the interruption algorithm is not used;<\/li><li>Atrial pacing: PMTs are detected and the specific interruption algorithm is used;<\/li><\/ul><p>\u00a0<\/p><p>The PMT detection rate parameter determines how often the device checks for tachycardias compatible with PMT. This parameter can be set between 90 and 150 bpm (nominal value 130 bpm) and cannot exceed the maximum synchronous rate value.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-da806b1 elementor-widget elementor-widget-image\" data-id=\"da806b1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"http:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_tre_9.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_tre_9\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjU1NCwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfdHJlXzkucG5nIn0%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"487\" height=\"223\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_tre_9.png\" class=\"attachment-large size-large wp-image-6554\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_tre_9.png 487w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_tre_9-300x137.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_tre_9-18x8.png 18w\" sizes=\"(max-width: 487px) 100vw, 487px\" \/>\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-eca1654 elementor-widget elementor-widget-text-editor\" data-id=\"eca1654\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><\/p><p><\/p><p>Si le dispositif d\u00e9tecte 8 cycles cons\u00e9cutifs VP-AS \u00e0 une fr\u00e9quence plus rapide que la <br \/>fr\u00e9quence de d\u00e9tection TRE, il mesure la stabilit\u00e9 des intervalles VP-AS (moyenne les 8 <br \/>intervalles VP-AS et compare la valeur moyenne \u00e0 chacun des intervalles VP-AS) :<\/p><ul><li>si au moins un des intervalles VP-AS varie de plus de 16 ms par rapport \u00e0 la valeur moyenne : intervalles VP-AS consid\u00e9r\u00e9s comme instables<\/li><li>si tous les intervalles VP-AS varient de moins de 16 ms par rapport \u00e0 la moyenne : intervalles VP-AS consid\u00e9r\u00e9s comme stables<\/li><\/ul><p>\u00a0<\/p><p>Si les 8 intervalles VP-AS cons\u00e9cutifs sont consid\u00e9r\u00e9s comme stables : le d\u00e9lai AV d\u00e9tect\u00e9 (AS-VP) est modifi\u00e9 de 50 ms sur le neuvi\u00e8me cycle :<\/p><ul><li>\u00a0raccourci de 50 ms si le d\u00e9lai AV d\u00e9tect\u00e9 programm\u00e9 est &gt; 100 ms<\/li><li>allong\u00e9 de 50 ms si le d\u00e9lai AV d\u00e9tect\u00e9 programm\u00e9 est &gt; 100 ms<\/li><\/ul><p>\u00a0<\/p><p>Si l\u2019intervalle VP-AS du dixi\u00e8me cycle est inchang\u00e9 (moins de 16 ms de variation par <br \/>rapport au cycle VP-AS pr\u00e9c\u00e9dent), cela traduit le fait que le moment de survenue de l\u2019activit\u00e9 atriale d\u00e9pend du moment o\u00f9 est d\u00e9livr\u00e9e la stimulation ventriculaire (en faveur du diagnostic de TRE) :<\/p><ul><li>\u00a0l\u2019activit\u00e9 atriale est consid\u00e9r\u00e9e comme r\u00e9trograde et ne d\u00e9clenche pas de stimulation ventriculaire <br \/>(pas de d\u00e9lai AV)<\/li><li>une stimulation atriale est d\u00e9livr\u00e9e 330 ms apr\u00e8s l\u2019activit\u00e9 atriale spontan\u00e9e<\/li><\/ul><p>\u00a0<\/p><p>Si l\u2019intervalle VP-AS diff\u00e8re de plus de 16 ms, cela traduit le fait que le moment de <br \/>survenue de l\u2019activit\u00e9 atriale ne d\u00e9pend pas du moment o\u00f9 est d\u00e9livr\u00e9e la stimulation <br \/>ventriculaire (en faveur du diagnostic de tachycardie sinusale ou de tachycardie atriale), l\u2019appareil conclut \u00e0 l\u2019absence de TRE. La recherche de TRE ne reprend qu\u2019apr\u00e8s 256 cycles AS-VP pour \u00e9viter les interventions r\u00e9p\u00e9t\u00e9es de l\u2019algorithme lors d\u2019un \u00e9pisode de tachycardie sinusale.<\/p><p><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5e41bd4 elementor-widget elementor-widget-image\" data-id=\"5e41bd4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"http:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_tre_10.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_tre_10\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjU1MywidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfdHJlXzEwLnBuZyJ9\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"663\" height=\"413\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_tre_10.png\" class=\"attachment-large size-large wp-image-6553\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_tre_10.png 663w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_tre_10-300x187.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_tre_10-18x12.png 18w\" sizes=\"(max-width: 663px) 100vw, 663px\" \/>\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>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Abbott &#8211; AV delay, PMT, refractory periods Content Atrial refractory period \u00a0 Blanking and post-atrial refractory period There is a programmable post-atrial detection refractory period (between 93 and 190 ms, nominal value 93 ms). Similarly, after atrial pacing, there is a programmable atrial refractory period (between 190 and 470 ms, nominal value 190 ms).Events occurring [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":47,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-3618","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Abbott AV Delay PMT &amp; Refractory Periods | Cardiocases<\/title>\n<meta name=\"description\" content=\"Abbott 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\" 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