{"id":3619,"date":"2025-10-08T18:52:36","date_gmt":"2025-10-08T18:52:36","guid":{"rendered":"https:\/\/cardiocases.com\/?page_id=3619"},"modified":"2026-01-02T11:24:21","modified_gmt":"2026-01-02T11:24:21","slug":"atrial-arrhythmia-management-abbott","status":"publish","type":"page","link":"https:\/\/cardiocases.com\/fr\/pacing-defibrillation\/devices-per-company\/abbott\/atrial-arrhythmia-management-abbott\/","title":{"rendered":"Atrial arrhythmia management Abbott"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"3619\" class=\"elementor elementor-3619\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6c40d5d e-con-full e-flex e-con e-parent\" data-id=\"6c40d5d\" 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-a7d17ae elementor-widget elementor-widget-heading\" data-id=\"a7d17ae\" 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 - Atrial arrhythmia management<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8937508 elementor-toc--minimized-on-tablet elementor-widget elementor-widget-table-of-contents\" data-id=\"8937508\" 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__8937508\" 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__8937508\" 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__8937508\" 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-0a65944 elementor-widget elementor-widget-heading\" data-id=\"0a65944\" 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\">Mode-switch due to atrial arrhythmias<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e44653f elementor-widget elementor-widget-text-editor\" data-id=\"e44653f\" 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>Mode-switch algorithm<\/strong><\/p><p>Automatic mode switching (AMS) occurs when the filtered atrial rate exceeds the atrial tachycardia detection rate (ATDR).<\/p><p>ACM uses a filtered atrial rate, rather than an instantaneous rate, based on a comparison of the current atrial rate with a continuously updated average rate, in order to distinguish between sustained tachycardia and intermittent rapid cycles.<\/p><p>When the filtered atrial rate exceeds the programmed ADFR value, the device switches to DDI(R) or VVI(R) mode.<\/p><p>The device measures the instantaneous PP interval at each cycle.<\/p><p>It calculates a filtered atrial interval (FAI) according to the following rule:<\/p><ul><li>If instantaneous PP \u2264 FAI: FAI decremented by 38 ms<\/li><li>If instantaneous PP &gt; FAI: FAI incremented by 25 ms<\/li><\/ul><p>Mode switching occurs as soon as the filtered atrial interval becomes shorter than the atrial tachycardia detection interval.<\/p><p>During mode switching, the pacing rate corresponds to the AMS base rate (programmable independently of the base rate) or to the rate indicated by the sensor (slave rate).<\/p><p>Return to synchronous mode is only possible if the atrial rate falls below the maximum synchronous rate (FAI &gt; maximum synchronous rate interval).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-48eea99 elementor-widget elementor-widget-image\" data-id=\"48eea99\" 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_arythmies_a11.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_arythmies_a11\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjU3MSwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfYXJ5dGhtaWVzX2ExMS5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"526\" height=\"259\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_a11.png\" class=\"attachment-large size-large wp-image-6571\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_a11.png 526w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_a11-300x148.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_a11-18x9.png 18w\" sizes=\"(max-width: 526px) 100vw, 526px\" \/>\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-88ffaf3 elementor-widget elementor-widget-text-editor\" data-id=\"88ffaf3\" 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>Example: atrial tachycardia detection interval at 180 min\u207b\u00b9 \/ 333 ms<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c654343 elementor-widget elementor-widget-image\" data-id=\"c654343\" 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_arythmies_a12.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_arythmies_a12\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjU3MCwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfYXJ5dGhtaWVzX2ExMi5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"551\" height=\"468\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_a12.png\" class=\"attachment-large size-large wp-image-6570\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_a12.png 551w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_a12-300x255.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_a12-14x12.png 14w\" sizes=\"(max-width: 551px) 100vw, 551px\" \/>\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-438d510 elementor-widget elementor-widget-text-editor\" data-id=\"438d510\" 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>Programming<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0060fb6 elementor-widget elementor-widget-image\" data-id=\"0060fb6\" 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_arythmies_a13.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_arythmies_a13\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjU2OSwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfYXJ5dGhtaWVzX2ExMy5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"486\" height=\"222\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_a13.png\" class=\"attachment-large size-large wp-image-6569\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_a13.png 486w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_a13-300x137.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_a13-18x8.png 18w\" sizes=\"(max-width: 486px) 100vw, 486px\" \/>\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-2d7f357 elementor-widget elementor-widget-text-editor\" data-id=\"2d7f357\" 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>Recording an AT\/AF episode<\/p><p>The criterion for recording AT\/AF episodes uses the atrial tachycardia detection interval (ATDI). The calculation method for the filtered atrial interval (FAI) is identical.<\/p><p>To record an episode, there must be 4 consecutive cycles with a PP interval and an FAI that are less than the ADTI. These consecutive cycles prevent the recording of AMS episodes on cross-listening (alternating short and long cycles that can cause AMS but not the recording of the episode because there are no consecutive short cycles). The AMS criterion is more sensitive than the recording criterion, which is more specific. Eight cycles with a PP interval and an FAI greater than the IDTA are then required for the episode to be completed (two episodes less than 20 seconds apart are considered a single AT\/AF episode).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-38ea40f elementor-widget elementor-widget-image\" data-id=\"38ea40f\" 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_arythmies_a14.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_arythmies_a14\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjU2OCwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfYXJ5dGhtaWVzX2ExNC5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"679\" height=\"710\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_a14.png\" class=\"attachment-large size-large wp-image-6568\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_a14.png 679w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_a14-287x300.png 287w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_a14-11x12.png 11w\" sizes=\"(max-width: 679px) 100vw, 679px\" \/>\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-b5dff1e elementor-widget elementor-widget-image\" data-id=\"b5dff1e\" 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_arythmies_a15.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_arythmies_a15\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjU2NywidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfYXJ5dGhtaWVzX2ExNS5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"671\" height=\"487\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_a15.png\" class=\"attachment-large size-large wp-image-6567\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_a15.png 671w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_a15-300x218.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_a15-18x12.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-c7a9306 elementor-widget elementor-widget-text-editor\" data-id=\"c7a9306\" 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>AF Burden<\/strong><\/p><p>AT\/AF Burden is the percentage of time spent in AT\/AF over a 52-week period. Each data point on the graph represents the percentage of time the patient was in AT\/AF over a seven-day period.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2157d41 elementor-widget elementor-widget-image\" data-id=\"2157d41\" 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_arythmies_a16.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_arythmies_a16\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjU2NiwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfYXJ5dGhtaWVzX2ExNi5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"686\" height=\"347\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_a16.png\" class=\"attachment-large size-large wp-image-6566\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_a16.png 686w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_a16-300x152.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_a16-18x9.png 18w\" sizes=\"(max-width: 686px) 100vw, 686px\" \/>\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-14991d2 elementor-widget elementor-widget-heading\" data-id=\"14991d2\" 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 flutter management<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-57a84a6 elementor-widget elementor-widget-text-editor\" data-id=\"57a84a6\" 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>There is no algorithm of this type; when a 2\/1 flutter occurs, it is necessary to shorten the duration of the atrial blanking period following ventricular pacing.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e9536a3 elementor-widget elementor-widget-heading\" data-id=\"e9536a3\" 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 fibrillation prevention algorithm<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2142763 elementor-widget elementor-widget-text-editor\" data-id=\"2142763\" 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>No such algorithm; when 2:1 flutter occurs, AF Suppression\u2122 is required.<\/p><p>The AF Suppression\u2122 algorithm allows the device to stimulate the atrium at rates faster than the intrinsic atrial rate (overdrive).<\/p><p>When the algorithm detects two P waves within a 16-cycle window, the device increases the pacing rate to override spontaneous conduction. After pacing at the AF Suppression algorithm rate for the number of cycles specified by the Overdrive Cycles parameter (15 to 40; nominal 15), the device slows its rate until it detects two new P waves. If two P waves are detected, it returns to rapid pacing (overdrive). If it does not detect two P waves, pacing resumes according to the base rate, resting rate, or sensor rate setting.<\/p><p>Calculation of the overdrive frequency: for simulation frequencies &lt;59 bpm, the overdrive applied is fixed at 10 bpm (=minimum overdrive frequency); for frequencies &gt;151 bpm, fixed overdrive of 5 bpm (=maximum overdrive frequency); for frequencies between 60 and 150 bpm, the AF Suppression algorithm increases the stimulation frequency by a delta between the minimum overdrive frequency and the maximum overdrive frequency.<\/p><p>Programmable determines the interval and slope of reduction from the overdrive frequency to the base frequency, rest frequency, or frequency indicated by the sensor. if the overdrive frequency is greater than 100 bpm, 8 ms are added to each cycle up to 100 bpm, then +12 ms up to the base frequency.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7b52354 elementor-widget elementor-widget-image\" data-id=\"7b52354\" 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_arythmies_fa9.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_arythmies_fa9\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjU2NSwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfYXJ5dGhtaWVzX2ZhOS5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"512\" height=\"215\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa9.png\" class=\"attachment-large size-large wp-image-6565\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa9.png 512w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa9-300x126.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa9-18x8.png 18w\" sizes=\"(max-width: 512px) 100vw, 512px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5471402 elementor-widget elementor-widget-image\" data-id=\"5471402\" 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_arythmies_fa10.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_19_situations_arythmies_fa10\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NjU2NCwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNlwvMDFcL3BtXzE5X3NpdHVhdGlvbnNfYXJ5dGhtaWVzX2ZhMTAucG5nIn0%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"491\" height=\"832\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa10.png\" class=\"attachment-large size-large wp-image-6564\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa10.png 491w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa10-177x300.png 177w, https:\/\/cardiocases.com\/wp-content\/uploads\/2026\/01\/pm_19_situations_arythmies_fa10-7x12.png 7w\" sizes=\"(max-width: 491px) 100vw, 491px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Abbott &#8211; Atrial arrhythmia management Content Mode-switch due to atrial arrhythmias Mode-switch algorithm Automatic mode switching (AMS) occurs when the filtered atrial rate exceeds the atrial tachycardia detection rate (ATDR). ACM uses a filtered atrial rate, rather than an instantaneous rate, based on a comparison of the current atrial rate with a continuously updated average [&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-3619","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 Pacemaker Atrial Arrhythmia Mgmt | Cardiocases<\/title>\n<meta name=\"description\" content=\"Abbott pacemaker mode switch &amp; atrial arrhythmia management \u2014 programming, ECG recognition &amp; tips.\" \/>\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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