{"id":231,"date":"2025-07-09T13:40:50","date_gmt":"2025-07-09T13:40:50","guid":{"rendered":"https:\/\/cardiocases.com\/?page_id=231"},"modified":"2025-11-18T15:22:47","modified_gmt":"2025-11-18T15:22:47","slug":"traditional-pacing-modes","status":"publish","type":"page","link":"https:\/\/cardiocases.com\/fr\/pacing-defibrillation\/basic-concepts\/pacemaker\/traditional-pacing-modes\/","title":{"rendered":"Modes traditionnels de stimulation"},"content":{"rendered":"<div data-elementor-type=\"wp-page\" data-elementor-id=\"231\" class=\"elementor elementor-231\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-86f3228 e-con-full e-flex e-con e-parent\" data-id=\"86f3228\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-86b29d6 elementor-widget elementor-widget-heading\" data-id=\"86b29d6\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Modes traditionnels de stimulation<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a162ac5 elementor-widget elementor-widget-text-editor\" data-id=\"a162ac5\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"color: #000000;\">En fonction du nombre de sondes et du mod\u00e8le de dispositif implant\u00e9, diff\u00e9rents modes de stimulation sont programmables. Le fonctionnement, les avantages et les inconv\u00e9nients propres \u00e0 chaque mode de stimulation doivent \u00eatre familiers du m\u00e9decin assurant le suivi afin d\u2019optimiser la programmation par rapport aux sp\u00e9cificit\u00e9s des diff\u00e9rents patients implant\u00e9s.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ed66ab3 elementor-toc--minimized-on-tablet elementor-widget elementor-widget-table-of-contents\" data-id=\"ed66ab3\" data-element_type=\"widget\" data-settings=\"{&quot;headings_by_tags&quot;:[&quot;h2&quot;,&quot;h3&quot;,&quot;h4&quot;],&quot;exclude_headings_by_selector&quot;:[],&quot;marker_view&quot;:&quot;bullets&quot;,&quot;no_headings_message&quot;:&quot;No headings were found on this page.&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__ed66ab3\" 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__ed66ab3\" 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__ed66ab3\" 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-233cf26 elementor-widget elementor-widget-heading\" data-id=\"233cf26\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Le code international<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fd93c3b elementor-widget elementor-widget-text-editor\" data-id=\"fd93c3b\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Une approche combin\u00e9e entre la soci\u00e9t\u00e9 nord-am\u00e9ricaine et la soci\u00e9t\u00e9 anglaise de stimulation et \u00e9lectrophysiologie (NASPE et BPEG) a permis de d\u00e9finir un code international (NBG) de classification des diff\u00e9rents modes de stimulation. Les divers modes de stimulation sont qualifi\u00e9s par un code \u00e0 4 ou 5 lettres permettant de comprendre leur fonctionnement de base.<\/p><ul><li>La premi\u00e8re lettre d\u00e9finit le(s) site(s) de stimulation : ventricule (V), oreillette (A), les deux (D), simple chambre (S) ou aucune (0).<\/li><li>La deuxi\u00e8me lettre d\u00e9finit le(s) site(s) de d\u00e9tection : m\u00eames lettres.\u00a0<\/li><li>La troisi\u00e8me lettre indique le mode de fonctionnement : inhib\u00e9 (I), d\u00e9clench\u00e9 (T, pour triggered), les deux (D), aucun des pr\u00e9c\u00e9dents (0).\u00a0<\/li><li>La quatri\u00e8me lettre indique l\u2019asservissement de fr\u00e9quence (R) ou son absence (0).\u00a0<\/li><li>La cinqui\u00e8me lettre indique la pr\u00e9sence d\u2019une stimulation multisite : absence (0), atriale (A), ventriculaire (V) et double (D : A+V).\u00a0<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-212b2ef elementor-widget elementor-widget-heading\" data-id=\"212b2ef\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Stimulation simple chambre<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-dfd82a9 elementor-widget elementor-widget-text-editor\" data-id=\"dfd82a9\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6><a><strong>Les modes asynchrones SOO (VOO et AOO)<\/strong><\/a><\/h6><ul><li>Stimulation simple chambre<\/li><li>Pas de d\u00e9tection<\/li><li>Stimulation asynchrone<\/li><\/ul><div>\u00a0<\/div><p>Les modes A00 et V00 fournissent une stimulation asynchrone \u00e0 fr\u00e9quence fixe \u00e0 la fr\u00e9quence minimale programm\u00e9e sans inhibition par des \u00e9v\u00e9nements spontan\u00e9s dans la cavit\u00e9 concern\u00e9e.\u00a0<\/p><p>Le seul intervalle \u00e0 programmer est l'intervalle de stimulation (ou fr\u00e9quence = 60 000\/intervalle de stimulation). Il s'agit donc du mode de stimulation le plus basique et \u00e9tait le seul mode programmable sur les tous premiers stimulateurs.<\/p><p>Aspect \u00e9lecrocardiographique (V00): survenue r\u00e9guli\u00e8re de stimuli de stimulation ventriculaires sans influence de l\u2019activit\u00e9 spontan\u00e9e intrins\u00e8que.\u00a0<\/p><p>Aspect \u00e9lecrocardiographique (A00): m\u00eame chose pour l\u2019oreillette.<\/p><p>Les modes A00 et V00 sont les modes sous aimant respectivement des modes simple chambre atriaux et ventriculaires correspondants. Le mode V00 est \u00e9galement le mode sous aimant du mode VDD.<\/p><p>Les modes S00 en programmation permanente sont aujourd\u2019hui obsol\u00e8tes et correspondent \u00e0 des modes de test; ils pouvaient initialement \u00eatre programm\u00e9s pour \u00e9viter la d\u00e9tection d\u2019interf\u00e9rences \u00e9lectromagn\u00e9tiques et l\u2019inhibition qui en r\u00e9sultait chez les patients d\u00e9pendants de leur stimulateur. Cependant, ce mode de stimulation est associ\u00e9 avec un risque arythmog\u00e8ne par stimulation sur l\u2019onde T, et il ne faut l\u2019utiliser que comme mode de test.\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-d6da9de e-con-full e-flex e-con e-parent\" data-id=\"d6da9de\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0ffc1e4 elementor-widget elementor-widget-text-editor\" data-id=\"0ffc1e4\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6><a><strong>Les modes SSI\/ SSIR<\/strong><\/a><\/h6><p>Le mode SSI est simple chambre, VVI si la sonde est implant\u00e9e dans le ventricule et AAI si la sonde est dans l\u2019oreillette. Pour ces 2 modes de stimulation, une stimulation survient \u00e0 la fin d\u2019un intervalle d\u2019\u00e9chappement programmable. Si un \u00e9v\u00e8nement spontan\u00e9 est d\u00e9tect\u00e9, la stimulation est inhib\u00e9e et l\u2019intervalle d\u2019\u00e9chappement est recycl\u00e9. En l\u2019absence d\u2019\u00e9v\u00e9nement spontan\u00e9, le stimulateur stimule \u00e0 la fin de l\u2019intervalle de stimulation programm\u00e9.\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-a717c60 e-con-full e-flex e-con e-parent\" data-id=\"a717c60\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-bb9bde5 elementor-widget elementor-widget-text-editor\" data-id=\"bb9bde5\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6><strong>Le mode VVI\/VVIR<\/strong><\/h6><ul><li>Stimulation ventriculaire<\/li><li>D\u00e9tection ventriculaire<\/li><li>Inhibition par la d\u00e9tection d\u2019un signal ventriculaire hors p\u00e9riodes r\u00e9fractaires<\/li><\/ul><div>\u00a0<\/div><p>Le mode VVI fournit une stimulation simple chambre \u00e0 la fr\u00e9quence de stimulation programm\u00e9e, \u00e0 moins d\u2019une inhibition par un \u00e9v\u00e9nement d\u00e9tect\u00e9. La d\u00e9tection ne s\u2019applique qu\u2019au ventricule. Un intervalle d'\u00e9chappement d\u00e9bute apr\u00e8s toute d\u00e9tection ventriculaire.<\/p><p>Il est important de noter que la d\u00e9tection d\u2019un signal ventriculaire spontan\u00e9 par le stimulateur peut \u00eatre retard\u00e9e par rapport au d\u00e9but du complexe QRS visualis\u00e9 sur l\u2019\u00e9lectrocardiogramme de surface. Cela est particuli\u00e8rement visible chez un patient pr\u00e9sentant un bloc de branche droit, la d\u00e9tection du QRS ne se faisant que quand la d\u00e9polarisation ventriculaire passe devant la cathode en position ventriculaire droite.\u00a0<\/p><p>La premi\u00e8re partie du cycle RR, apr\u00e8s d\u00e9tection comme apr\u00e8s stimulation, correspond \u00e0 la p\u00e9riode r\u00e9fractaire pendant laquelle le stimulateur ne peut pas d\u00e9tecter de signal. Un signal survenant dans cette p\u00e9riode r\u00e9fractaire ne recycle pas l'intervalle d'\u00e9chappement. Cette p\u00e9riode r\u00e9fractaire est n\u00e9cessaire pour \u00e9viter une double d\u00e9tection d\u2019un m\u00eame complexe QRS spontan\u00e9 ou stimul\u00e9, ou la d\u00e9tection d\u2019une onde T. Un signal d\u00e9tect\u00e9 apr\u00e8s cette p\u00e9riode r\u00e9fractaire inhibe la stimulation et recycle l'intervalle d'\u00e9chappement.\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-8fb58b5 e-con-full e-flex e-con e-parent\" data-id=\"8fb58b5\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1ea8b5b elementor-widget elementor-widget-image\" data-id=\"1ea8b5b\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"http:\/\/cardiocases.com\/wp-content\/uploads\/2025\/10\/pm_traditionalmodes_1.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_traditionalmodes_1\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MzQyNywidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNVwvMTBcL3BtX3RyYWRpdGlvbmFsbW9kZXNfMS5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"647\" height=\"338\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/10\/pm_traditionalmodes_1.png\" class=\"attachment-large size-large wp-image-3427\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/10\/pm_traditionalmodes_1.png 647w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/10\/pm_traditionalmodes_1-300x157.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/10\/pm_traditionalmodes_1-18x9.png 18w\" sizes=\"(max-width: 647px) 100vw, 647px\" \/>\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-d092eba elementor-widget elementor-widget-text-editor\" data-id=\"d092eba\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Le mode VVIR fournit une stimulation simple chambre ventriculaire \u00e0 la fr\u00e9quence asservie qui est une fr\u00e9quence de base variable avec l\u2019effort mesur\u00e9 par un capteur.\u00a0<\/p><p>Le mode VVI\/VVIR est particuli\u00e8rement indiqu\u00e9 chez les patients en fibrillation auriculaire permanente chez qui la d\u00e9tection et la stimulation atriale sont inutiles. Ce mode peut \u00eatre \u00e9galement programm\u00e9 chez des patients pr\u00e9sentant des \u00e9pisodes de bradycardie paroxystique. La fr\u00e9quence minimale est programm\u00e9e inf\u00e9rieure \u00e0 la fr\u00e9quence spontan\u00e9e du patient et le stimulateur ne se d\u00e9clenche que lors de la survenue d\u2019une pause.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d96aff9 elementor-widget elementor-widget-text-editor\" data-id=\"d96aff9\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6><strong>Le mode AAI\/AAIR<\/strong><\/h6><ul><li>Stimulation atriale<\/li><li>D\u00e9tection atriale<\/li><li>Inhibition par la d\u00e9tection d\u2019un signal atrial hors p\u00e9riode r\u00e9fractaire\u00a0<\/li><\/ul><div>\u00a0<\/div><p>Le mode AAI fournit une stimulation atriale simple chambre \u00e0 la fr\u00e9quence de stimulation programm\u00e9e \u00e0 moins d\u2019une inhibition par un \u00e9v\u00e9nement d\u00e9tect\u00e9.\u00a0<\/p><p>La d\u00e9tection ne s'applique qu'\u00e0 l'oreillette.\u00a0<\/p><p>La programmation et le fonctionnement sont sensiblement les m\u00eames que pour un stimulateur VVI. Il faut toutefois programmer une sensibilit\u00e9 plus \u00e9lev\u00e9e (valeur programm\u00e9e plus basse), l'amplitude des complexes atriaux \u00e9tant souvent plus faible que celle des complexes ventriculaires. De m\u00eame, la p\u00e9riode r\u00e9fractaire doit \u00eatre plus longue pour \u00e9viter toute surd\u00e9tection ventriculaire. La d\u00e9tection d'une onde R par un stimulateur AAI entraine une baisse de la fr\u00e9quence de stimulation, car chaque onde R d\u00e9tect\u00e9e  recycle l'intervalle d'\u00e9chappement. En pr\u00e9sence d'une \u00e9coute crois\u00e9e (d\u00e9tection de l'onde R), il est possible de rendre le stimulateur moins sensible et\/ou de prolonger la p\u00e9riode r\u00e9fractaire.<\/p><p>Aspect \u00e9lectrocardiographique typique : stimulation et capture atriale avec inhibition de la stimulation lors de la d\u00e9tection d\u2019une activit\u00e9 atriale spontan\u00e9e<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b0c4dfb elementor-widget elementor-widget-image\" data-id=\"b0c4dfb\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"http:\/\/cardiocases.com\/wp-content\/uploads\/2025\/10\/pm_traditionalmodes_2.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_traditionalmodes_2\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MzQyOCwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNVwvMTBcL3BtX3RyYWRpdGlvbmFsbW9kZXNfMi5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"647\" height=\"333\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/10\/pm_traditionalmodes_2.png\" class=\"attachment-large size-large wp-image-3428\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/10\/pm_traditionalmodes_2.png 647w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/10\/pm_traditionalmodes_2-300x154.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/10\/pm_traditionalmodes_2-18x9.png 18w\" sizes=\"(max-width: 647px) 100vw, 647px\" \/>\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-4e24027 elementor-widget elementor-widget-text-editor\" data-id=\"4e24027\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Le mode AAIR fournit une stimulation simple chambre auriculaire \u00e0 la fr\u00e9quence asservie.<\/p><p>L\u2019indication pr\u00e9f\u00e9rentielle d\u2019un stimulateur AAI\/AAIR est la pr\u00e9sence d\u2019une dysfonction sinusale pure avec pr\u00e9servation d\u2019une conduction auriculo-ventriculaire normale. Au moment de l\u2019implantation, il est donc important de v\u00e9rifier la qualit\u00e9 de cette conduction auriculo-ventriculaire. L\u2019existence d\u2019une conduction auriculo-ventriculaire 1\/1 au-del\u00e0 d\u2019une fr\u00e9quence de stimulation atriale sup\u00e9rieure \u00e0 120-130 battements\/minute associ\u00e9e \u00e0 un intervalle PR normal et des QRS normaux, est un bon reflet d\u2019une conduction pr\u00e9serv\u00e9e. Dans ce cadre, le risque de bloc auriculo-ventriculaire est limit\u00e9.\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a8b6fc2 elementor-widget elementor-widget-text-editor\" data-id=\"a8b6fc2\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6><a><strong>Modes SST (VVT ou AAT)<\/strong><\/a><\/h6>\n<ul>\n<li>Stimulation ventriculaire ou atriale<\/li>\n<li>D\u00e9tection ventriculaire ou atriale&nbsp;<\/li>\n<li>D\u00e9clenchement de la stimulation sur onde R ou onde P d\u00e9tect\u00e9e hors p\u00e9riode r\u00e9fractaire&nbsp;<\/li>\n<\/ul>\n<div>&nbsp;<\/div>\n<p>En modes AAT et VVT, la stimulation se produit \u00e0 la fr\u00e9quence minimale programm\u00e9e, mais un \u00e9v\u00e9nement d\u00e9tect\u00e9 en dehors des p\u00e9riodes r\u00e9fractaires d\u00e9clenche une stimulation imm\u00e9diate dans la cavit\u00e9 correspondante. Cette stimulation est non dangereuse car elle survient syst\u00e9matiquement dans la p\u00e9riode r\u00e9fractaire absolue naturelle du myocarde ventriculaire ou auriculaire.&nbsp;<\/p>\n<p>Les 3 param\u00e8tres importants \u00e0 programmer sont la fr\u00e9quence de base, la fr\u00e9quence maximale et la p\u00e9riode r\u00e9fractaire. Les 2 derniers permettent d'\u00e9viter l'emballement du stimulateur \u00e0 la suite de la d\u00e9tection de signaux rapides.&nbsp;<\/p>\n<p>Aspect \u00e9lectrocardiographique typique (VVT) : en l\u2019absence d\u2019activit\u00e9 spontan\u00e9e, stimulation et capture ventriculaire \u00e0 intervalle fixe. La survenue d\u2019un complexe ventriculaire spontan\u00e9 en dehors des p\u00e9riodes r\u00e9fractaires entraine la survenue d\u2019un stimulus \u00e0 l\u2019int\u00e9rieur du QRS. L\u2019aspect du QRS est soit identique au QRS spontan\u00e9 (pseudo-fusion) soit interm\u00e9diaire entre le QRS spontan\u00e9 et le QRS stimul\u00e9 (fusion).&nbsp;<\/p><p>Aspect \u00e9lectrocardiographique typique (AAT) : m\u00eame chose pour l\u2019oreillette.<\/p>\n<p>Ce type de mode de stimulation est aujourd\u2019hui tr\u00e8s peu utilis\u00e9. En effet, la stimulation lors de la d\u00e9tection est associ\u00e9e avec une augmentation inutile de la consommation \u00e9nerg\u00e9tique avec acc\u00e9l\u00e9ration de l'usure de la batterie. Ils peuvent \u00eatre utilis\u00e9s temporairement pour \u00e9viter une inhibition chez un patient d\u00e9pendant pr\u00e9sentant une sur-d\u00e9tection. Ils peuvent permettre \u00e9galement de v\u00e9rifier la qualit\u00e9 et le moment de la d\u00e9tection au cours de tests temporaires.&nbsp;<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4496bbc elementor-widget elementor-widget-heading\" data-id=\"4496bbc\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Stimulateurs double chambre<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-9602ea3 e-con-full e-flex e-con e-parent\" data-id=\"9602ea3\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6fe3b26 elementor-widget elementor-widget-text-editor\" data-id=\"6fe3b26\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6><a><strong>Le mode D00<\/strong><\/a><\/h6><ul><li>Double stimulation asynchrone<\/li><li>Pas de d\u00e9tection<\/li><\/ul><div>\u00a0<\/div><p>Le mode D00 fournit une stimulation s\u00e9quentielle AV \u00e0 la fr\u00e9quence minimale programm\u00e9e sans inhibition par des \u00e9v\u00e9nements intrins\u00e8ques.<\/p><p>Les d\u00e9lais AV et les d\u00e9lais VA sont fixes et ne sont pas recycl\u00e9s puisque la d\u00e9tection n\u2019est pas possible.\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-98efa89 elementor-widget elementor-widget-image\" data-id=\"98efa89\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"http:\/\/cardiocases.com\/wp-content\/uploads\/2025\/10\/pm_traditionalmodes_3.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_traditionalmodes_3\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MzQyOSwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNVwvMTBcL3BtX3RyYWRpdGlvbmFsbW9kZXNfMy5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"668\" height=\"338\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/10\/pm_traditionalmodes_3.png\" class=\"attachment-large size-large wp-image-3429\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/10\/pm_traditionalmodes_3.png 668w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/10\/pm_traditionalmodes_3-300x152.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/10\/pm_traditionalmodes_3-18x9.png 18w\" sizes=\"(max-width: 668px) 100vw, 668px\" \/>\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-9c6e1bb elementor-widget elementor-widget-text-editor\" data-id=\"9c6e1bb\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>En plus d\u2019\u00eatre directement programmable, le mode D00 est le mode double chambre appliqu\u00e9 lorsqu\u2019un aimant est plac\u00e9 en regard du stimulateur, \u00e0 l\u2019exception du mode VDD (mode sous-aimant V00, car pas de stimulation atriale possible).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d7e7afb elementor-widget elementor-widget-text-editor\" data-id=\"d7e7afb\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6><a><strong>Le mode DDD\/DDDR<\/strong><\/a><\/h6><ul><li>Double stimulation (atriale et ventriculaire)<\/li><li>Double d\u00e9tection (atriale et ventriculaire)<\/li><li>Double r\u00e9ponse \u00e0 la d\u00e9tection (inhib\u00e9e et d\u00e9clench\u00e9e)<\/li><\/ul><div>\u00a0<\/div><p>Le mode DDD correspond au mode de programmation standard des stimulateurs double chambre ou de resynchronisation. Il permet d\u2019assurer une synchronisation auriculo-ventriculaire au repos comme \u00e0 l\u2019effort sur activit\u00e9 atriale d\u00e9tect\u00e9e ou stimul\u00e9e.<\/p><p>Une activit\u00e9 atriale spontan\u00e9e survenant en dehors des p\u00e9riodes r\u00e9fractaires inhibe la stimulation atriale. Une activit\u00e9 spontan\u00e9e ventriculaire survenant en dehors des p\u00e9riodes r\u00e9fractaires inhibe la stimulation ventriculaire.<\/p><p>Chaque \u00e9v\u00e9nement atrial stimul\u00e9 ou chaque \u00e9v\u00e9nement atrial d\u00e9tect\u00e9 en dehors des p\u00e9riodes r\u00e9fractaires marque le d\u00e9but d\u2019un d\u00e9lai AV et un intervalle de fr\u00e9quence minimale.<\/p><p>Les d\u00e9lais AV qui suivent les \u00e9v\u00e9nements atriaux d\u00e9tect\u00e9s et les \u00e9v\u00e9nements atriaux stimul\u00e9s sont programmables s\u00e9par\u00e9ment ; il est possible de programmer le raccourcissement des d\u00e9lais AV lorsque les fr\u00e9quences augmentent (d\u00e9lai AV adaptable) ou leur modification en fonction des temps de conduction spontan\u00e9s.<\/p><p>Un \u00e9v\u00e9nement ventriculaire stimul\u00e9 peut suivre un \u00e9v\u00e9nement atrial d\u00e9tect\u00e9 jusqu\u2019\u00e0 la fr\u00e9quence maximale synchrone programm\u00e9e : c\u2019est la limite de fr\u00e9quence \u00e0 partir de laquelle le stimulateur n\u2019est plus autoris\u00e9 \u00e0 stimuler le ventricule en suivant la fr\u00e9quence des oreillettes.\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-55bf588 elementor-widget elementor-widget-image\" data-id=\"55bf588\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"http:\/\/cardiocases.com\/wp-content\/uploads\/2025\/10\/pm_traditionalmodes_4.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_traditionalmodes_4\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MzQzMCwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNVwvMTBcL3BtX3RyYWRpdGlvbmFsbW9kZXNfNC5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"661\" height=\"330\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/10\/pm_traditionalmodes_4.png\" class=\"attachment-large size-large wp-image-3430\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/10\/pm_traditionalmodes_4.png 661w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/10\/pm_traditionalmodes_4-300x150.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/10\/pm_traditionalmodes_4-18x9.png 18w\" sizes=\"(max-width: 661px) 100vw, 661px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-aa4088c elementor-widget elementor-widget-text-editor\" data-id=\"aa4088c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>En mode DDDR, le stimulateur suit la plus rapide des fr\u00e9quences, atriale intrins\u00e8que ou la fr\u00e9quence indiqu\u00e9e par le capteur. La fr\u00e9quence maximale synchrone et la fr\u00e9quence maximale asservie sont programmables s\u00e9par\u00e9ment.<\/p>\n<p>Le mode DDD est sens\u00e9 r\u00e9pondre aux caract\u00e9ristiques pr\u00e9sent\u00e9es par l\u2019ensemble des patients implant\u00e9s.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2cc59f1 elementor-widget elementor-widget-text-editor\" data-id=\"2cc59f1\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6><a><strong>Le mode DDI\/DDIR<\/strong><\/a><\/h6><ul><li>Double stimulation (atriale et ventriculaire)<\/li><li>Double d\u00e9tection (atriale et ventriculaire)<\/li><li>Inhibition par les \u00e9v\u00e9nements d\u00e9tect\u00e9s (atriaux et ventriculaires)\u00a0<\/li><\/ul><div>\u00a0<\/div><p>La stimulation atriale s\u2019effectue \u00e0 la fr\u00e9quence minimale programm\u00e9e.\u00a0<\/p><p>Apr\u00e8s stimulation atriale, la stimulation ventriculaire se produit \u00e0 la fin du d\u00e9lai AV s\u2019il n\u2019y a pas d\u2019\u00e9v\u00e9nement ventriculaire d\u00e9tect\u00e9 pendant ce d\u00e9lai.<\/p><p>Un \u00e9v\u00e9nement atrial d\u00e9tect\u00e9 en dehors des p\u00e9riodes r\u00e9fractaires inhibe la stimulation atriale et ne d\u00e9clenche jamais de d\u00e9lai AV.\n\nAinsi, apr\u00e8s une d\u00e9tection atriale et en l\u2019absence de conduction AV spontan\u00e9e, la stimulation ventriculaire survient \u00e0 la fr\u00e9quence minimale, dissoci\u00e9e de la d\u00e9tection atriale, comme dans un stimulateur VVI.\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0e1eb22 elementor-widget elementor-widget-image\" data-id=\"0e1eb22\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"http:\/\/cardiocases.com\/wp-content\/uploads\/2025\/10\/pm_traditionalmodes_5.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_traditionalmodes_5\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MzQzMSwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNVwvMTBcL3BtX3RyYWRpdGlvbmFsbW9kZXNfNS5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"658\" height=\"333\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/10\/pm_traditionalmodes_5.png\" class=\"attachment-large size-large wp-image-3431\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/10\/pm_traditionalmodes_5.png 658w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/10\/pm_traditionalmodes_5-300x152.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/10\/pm_traditionalmodes_5-18x9.png 18w\" sizes=\"(max-width: 658px) 100vw, 658px\" \/>\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-06fdbc6 elementor-widget elementor-widget-text-editor\" data-id=\"06fdbc6\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>En cas d\u2019arythmie atriale, il ne peut jamais survenir d\u2019emballement de la fr\u00e9quence de stimulation ventriculaire puisque un \u00e9v\u00e9nement atrial spontan\u00e9 ne d\u00e9clenche jamais de d\u00e9lai AV.\u00a0<\/p><p>Le mode DDI est propos\u00e9 en cas d\u2019arythmie atriale fr\u00e9quente chez un patient avec syndrome brady\/tachycardie.\nCe mode de stimulation n\u2019est pas ad\u00e9quat pour les patients en bloc auriculo-ventriculaire complet avec fr\u00e9quence atriale spontan\u00e9e \u00e9lev\u00e9e, les ondes P spontan\u00e9es ne synchronisant pas de d\u00e9lai AV. Ce mode de stimulation peut \u00eatre programm\u00e9 chez les patients en bloc auriculo-ventriculaire complet avec maladie de l\u2019oreillette : en rythme sinusal, une dysfonction sinusale est observ\u00e9e r\u00e9sultant en une double stimulation auriculo-ventriculaire ; lors d\u2019un \u00e9pisode d\u2019arythmie, l\u2019activit\u00e9 atriale spontan\u00e9e rapide n\u2019est pas suivie d\u2019une stimulation ventriculaire rapide. Ce mode est particuli\u00e8rement utile quand l\u2019algorithme de repli dysfonctionne.\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-711f55e elementor-widget elementor-widget-text-editor\" data-id=\"711f55e\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6><a><strong>Le mode VDD<\/strong><\/a><\/h6><ul><li>Stimulation ventriculaire<\/li><li>Double d\u00e9tection (atriale et ventriculaire)<\/li><li>Stimulation ventriculaire d\u00e9clench\u00e9e par la d\u00e9tection atriale, inhibition par les \u00e9v\u00e9nements atriaux et ventriculaires\u00a0<\/li><\/ul><div>\u00a0<\/div><p>La d\u00e9tection s\u2019effectue dans l\u2019oreillette et dans le ventricule mais la stimulation ne s\u2019effectue que dans le ventricule. Le mode VDD fournit une stimulation synchronis\u00e9e sur l\u2019oreillette d\u00e9tect\u00e9e. S\u2019il n\u2019y a pas d\u2019\u00e9v\u00e9nement atrial, la stimulation est de type VVI \u00e0 la fr\u00e9quence de base.\u00a0<\/p><p>Le ventricule est stimul\u00e9 de fa\u00e7on synchrone \u00e0 l\u2019oreillette jusqu\u2019\u00e0 la fr\u00e9quence maximale synchrone.\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-04a3d17 elementor-widget elementor-widget-image\" data-id=\"04a3d17\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"http:\/\/cardiocases.com\/wp-content\/uploads\/2025\/10\/pm_traditionalmodes_6.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm_traditionalmodes_6\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MzQzMiwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNVwvMTBcL3BtX3RyYWRpdGlvbmFsbW9kZXNfNi5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"670\" height=\"321\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/10\/pm_traditionalmodes_6.png\" class=\"attachment-large size-large wp-image-3432\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/10\/pm_traditionalmodes_6.png 670w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/10\/pm_traditionalmodes_6-300x144.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/10\/pm_traditionalmodes_6-18x9.png 18w\" sizes=\"(max-width: 670px) 100vw, 670px\" \/>\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-3b9ff3f elementor-widget elementor-widget-text-editor\" data-id=\"3b9ff3f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Le mode VDD n\u2019est donc pas appropri\u00e9 pour les patients pr\u00e9sentant une dysfonction sinusale, aucune stimulation atriale n\u2019\u00e9tant possible. Le mode VDD est adapt\u00e9 chez les patients avec bloc auriculo-ventriculaire complet, fonction sinusale et fonction chronotrope normales. Il est possible \u00e9galement d\u2019implanter un syst\u00e8me de stimulation sp\u00e9cifique VDD avec une seule sonde de stimulation\/d\u00e9tection ventriculaire avec deux \u00e9lectrodes flottantes permettant la d\u00e9tection atriale.\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-00e9b5c elementor-widget elementor-widget-text-editor\" data-id=\"00e9b5c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6><a><strong>Le mode DDT<\/strong><\/a><\/h6><ul><li>Double stimulation (atriale et ventriculaire)<\/li><li>Double d\u00e9tection (atriale et ventriculaire)\u00a0<\/li><li>Stimulation ventriculaire et atriale sur toute d\u00e9tection ventriculaire ou atriale hors p\u00e9riodes r\u00e9fractaires.<\/li><\/ul><div>\u00a0<\/div><p>C\u2019est un mode de test temporaire pour la d\u00e9tection.<\/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>Traditional pacing modes According to the amount of leads and the model of the implanted device, different pacing modes are programmable. The function of each mode, its\u00a0advantages and disadvantages need to be familier to the responsable clinician in order to ensure a safe and optimized follow-up of the implanted patient. Content The international code A [&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-231","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 Pacing Modes: VVI, DDD, AAI, DDDR Explained | Cardiocases<\/title>\n<meta name=\"description\" content=\"Learn VVI, DDD, AAI, DDDR &amp; all traditional pacemaker pacing modes \u2014 real ECG tracings, timing cycles, sensing &amp; clinical examples. 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