{"id":777,"date":"2025-07-31T14:19:11","date_gmt":"2025-07-31T14:19:11","guid":{"rendered":"https:\/\/cardiocases.com\/?page_id=777"},"modified":"2026-07-15T12:53:21","modified_gmt":"2026-07-15T12:53:21","slug":"pacing-sensing-medtronic","status":"publish","type":"page","link":"https:\/\/cardiocases.com\/fr\/pacing-defibrillation\/devices-per-company\/medtronic\/pacing-sensing-medtronic\/","title":{"rendered":"Pacing &amp; Sensing Medtronic"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"777\" class=\"elementor elementor-777\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-97c962d e-con-full e-flex e-con e-parent\" data-id=\"97c962d\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-60b957a e-con-full e-flex e-con e-child\" data-id=\"60b957a\" 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-18a1d3d elementor-widget elementor-widget-heading\" data-id=\"18a1d3d\" 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\">Medtronic - Pacing &amp; sensing<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4079d07 elementor-toc--minimized-on-tablet elementor-widget elementor-widget-table-of-contents\" data-id=\"4079d07\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;headings_by_tags&quot;:[&quot;h3&quot;,&quot;h4&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__4079d07\" 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__4079d07\" 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__4079d07\" 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-5cfcd40 elementor-widget elementor-widget-heading\" data-id=\"5cfcd40\" 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 and ventricular autothreshold<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-02c5883 elementor-widget elementor-widget-text-editor\" data-id=\"02c5883\" 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><strong>Seuils automatiques ventriculaires : Autoseuil ventriculaire<\/strong><br \/>1 )La mesure du seuil ventriculaire est bas\u00e9e sur l\u2019\u00e9valuation de la r\u00e9ponse \u00e9voqu\u00e9e<br \/>2) Le dispositif mesure p\u00e9riodiquement le seuil de stimulation ventriculaire tous les jours \u00e0 1 heure du matin<br \/>3) L\u2019amplitude de stimulation est adapt\u00e9e automatiquement en fonction de la marge de <br \/>s\u00e9curit\u00e9 programm\u00e9e et de l\u2019amplitude minimale programm\u00e9e<br \/>4) La dur\u00e9e d\u2019impulsion peut \u00eatre adapt\u00e9e automatiquement entre 0.4 et 1 ms <br \/>5) Il n\u2019y a pas de v\u00e9rification cycle-\u00e0-cycle de l\u2019efficacit\u00e9 de la capture ventriculaire ; l\u2019adaptation de l\u2019amplitude de stimulation ventriculaire est bas\u00e9e sur le concept de l\u2019Autoseuil ; la m\u00eame amplitude est d\u00e9livr\u00e9e (seuil mesur\u00e9 + marge de s\u00e9curit\u00e9) jusqu\u2019\u00e0 <br \/>la prochaine mesure de seuil automatique<\/p><p><strong>Seuils automatiques atriaux : Autoseuil atrial<\/strong><br \/>6) 2 m\u00e9thodes de mesure de seuil atrial peuvent \u00eatre utilis\u00e9es par le dispositif : une m\u00e9thode bas\u00e9e sur la d\u00e9tection d\u2019une activit\u00e9 atriale spontan\u00e9e t\u00e9moin de la perte de <br \/>capture atriale et une m\u00e9thode bas\u00e9e sur l\u2019absence de d\u00e9tection ventriculaire suivant une stimulation atriale (patients avec conduction auriculoventriculaire pr\u00e9serv\u00e9e)<br \/>7) Le dispositif mesure p\u00e9riodiquement le seuil de stimulation atriale tous les jours \u00e0 1 <br \/>heure du matin<br \/>8) L\u2019amplitude de stimulation atriale est adapt\u00e9e automatiquement en fonction de la marge de s\u00e9curit\u00e9 programm\u00e9e et de l\u2019amplitude minimale programm\u00e9e<br \/>9) La dur\u00e9e d\u2019impulsion peut \u00eatre adapt\u00e9e automatiquement entre 0.4 et 1 ms <br \/>10) Il n\u2019y a pas de v\u00e9rification cycle-\u00e0-cycle de l\u2019efficacit\u00e9 de la capture atriale ; l\u2019adaptation <br \/>de l\u2019amplitude de stimulation atriale est bas\u00e9e sur le concept de l\u2019Autoseuil ; la m\u00eame amplitude est d\u00e9livr\u00e9e (seuil mesur\u00e9 + marge de s\u00e9curit\u00e9) jusqu\u2019\u00e0 la prochaine mesure de seuil automatique<\/p><h5><strong>Contr\u00f4le automatique du seuil ventriculaire droit<\/strong> <br \/>G\u00e9n\u00e9ralit\u00e9s<\/h5><p>Quand le contr\u00f4le de seuil ventriculaire droit est programm\u00e9 sur automatique, une mesure <br \/>quotidienne du seuil de stimulation ventriculaire est r\u00e9alis\u00e9e avec adaptation de la <br \/>programmation pour les 24 heures qui suivent.<\/p><ul><li>Contr\u00f4le de seuil ventriculaire droit sur automatique : mesure quotidienne du seuil de stimulation ventriculaire + adaptation de la programmation pour les 24 heures qui suivent<\/li><li>\u00a0Seuil r\u00e9alis\u00e9 syst\u00e9matiquement tous les jours \u00e0 1h00 du matin<\/li><li>\u00a0Mesure du seuil de stimulation bas\u00e9e sur l\u2019analyse de la r\u00e9ponse \u00e9voqu\u00e9e<\/li><li>\u00a0Une seule mesure quotidienne avec adaptation pour les 24 heures qui suivent<\/li><li>Amplitude cible en multipliant la marge de s\u00e9curit\u00e9 en amplitude VD (programmable) par le seuil d\u2019amplitude mesur\u00e9 \u00e0 une dur\u00e9e d\u2019impulsion de 0,4 ms dans une plage de sortie d\u00e9finie par une limite inf\u00e9rieure programmable (param\u00e8tre Amplitude minimale ajust\u00e9e) et la limite sup\u00e9rieure de 5V et 1 ms<\/li><li>\u00a0Amplitude maximale pouvant \u00eatre d\u00e9livr\u00e9e : 5V pour 1 ms<\/li><li>\u00a0Contr\u00f4le de capture ventriculaire sur moniteur : mesure du seuil de stimulation ventriculaire sans adaptation<\/li><li>\u00a0Contr\u00f4le de capture sur arr\u00eat : programmation fixe sans mesure de seuil<\/li><\/ul><p>\u00a0<\/p><p><strong>Le contr\u00f4le de seuil ventriculaire droit en pratique<\/strong> <br \/>Chaque jour \u00e0 1 heure du matin, le stimulateur effectue une mesure du seuil de stimulation ventriculaire, afin de d\u00e9terminer le seuil en amplitude \u00e0 une dur\u00e9e d\u2019impulsion fixe de 0,4 ms.<\/p><ul><li>Le dispositif \u00e9value l\u2019entra\u00eenement en d\u00e9tectant le signal de la r\u00e9ponse \u00e9voqu\u00e9e suite \u00e0 chaque stimulation test<\/li><li>La recherche de seuil de stimulation commence \u00e0 une amplitude inf\u00e9rieure de 0,125V par rapport au dernier seuil mesur\u00e9 ; en l\u2019absence de recherche ant\u00e9rieure, la recherche commence \u00e0 0,75V<\/li><li>Le dispositif diminue l\u2019amplitude par pas de 0,125V jusqu\u2019\u00e0 perte de capture<\/li><li>\u00a0Il augmente alors l\u2019amplitude par \u00e9tapes de 0,125V jusqu\u2019\u00e0 ce qu\u2019il retrouve une capture 3 fois de suite (correspond \u00e0 la nouvelle valeur de seuil)<\/li><li>Durant la proc\u00e9dure de mesure du seuil, une stimulation de secours suit automatiquement chaque <br \/>stimulation test (qu\u2019il y ait eu capture ou pas), pour emp\u00eacher toute pause ventriculaire<\/li><li>La stimulation de secours est \u00e9mise 100 ms apr\u00e8s la stimulation test ; elle se fait \u00e0 l\u2019amplitude programm\u00e9e et \u00e0 une dur\u00e9e d\u2019impulsion de 1 ms<\/li><\/ul><p>\u00a0<\/p><p><strong>Adaptation automatique de l\u2019amplitude ventriculaire<\/strong> <br \/>Une fois que le seuil a \u00e9t\u00e9 mesur\u00e9, l\u2019amplitude de stimulation est automatiquement adapt\u00e9e pour les 24 heures suivantes sans v\u00e9rification cycle \u00e0 cycle de l\u2019efficacit\u00e9 de la capture (absence de stimulation de secours si perte de capture).<\/p><ul><li>\u00a0L\u2019amplitude d\u00e9livr\u00e9e pour ces 24 heures d\u00e9pend des valeurs programm\u00e9es pour les param\u00e8tres \u00ab Marge de s\u00e9curit\u00e9 en amplitude VD \u00bb et \u00ab Amplitude minimale ajust\u00e9e VD \u00bb<\/li><li>Apr\u00e8s une recherche de seuil de stimulation r\u00e9ussie, le dispositif calcule une amplitude cible en multipliant la marge de s\u00e9curit\u00e9 en amplitude VD par le seuil d\u2019amplitude mesur\u00e9 \u00e0 une dur\u00e9e d\u2019impulsion de 0,4 ms<\/li><li>\u00a0Cette adaptation ne peut s\u2019effectuer que dans une plage de sortie d\u00e9finie par une limite inf\u00e9rieure programmable (param\u00e8tre Amplitude minimale ajust\u00e9e) et la limite sup\u00e9rieure de 5V et 1 ms<\/li><li>La dur\u00e9e d\u2019impulsion minimale pour le contr\u00f4le du seuil ventriculaire est 0,4 ms<\/li><li>Si le seuil ventriculaire est mesur\u00e9 \u00e0 0.4V pour 0.4 ms avec une marge de s\u00e9curit\u00e9 minimale de 2 fois le seuil et une amplitude minimale de 2V, l\u2019amplitude d\u00e9livr\u00e9e est de 2V pour 0.4 ms<\/li><li>Si le seuil ventriculaire est mesur\u00e9 \u00e0 1.4 V pour 0.4 ms avec une marge de s\u00e9curit\u00e9 minimale de 2 fois le seuil et une amplitude minimale de 2V, l\u2019amplitude d\u00e9livr\u00e9e est de 2.8V pour 0.4 ms<\/li><li>Si le seuil ventriculaire est mesur\u00e9 \u00e0 3 V pour 0.4 ms avec une marge de s\u00e9curit\u00e9 minimale de 2 fois le seuil et une amplitude minimale de 2V, la dur\u00e9e d\u2019impulsion est alors augment\u00e9e pour obtenir un nouveau seuil ; si le nouveau seuil ventriculaire est mesur\u00e9 \u00e0 2.5V pour 0.8 ms, l\u2019amplitude d\u00e9livr\u00e9e est de 5V pour 0.8 ms (marge de s\u00e9curit\u00e9 en amplitude respect\u00e9e)<\/li><\/ul><p><\/p><p><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b4d931d elementor-widget elementor-widget-image\" data-id=\"b4d931d\" 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\/2025\/11\/pm-medtronic-stim-001.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"pm-medtronic-stim-001\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NDI1MiwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNVwvMTFcL3BtLW1lZHRyb25pYy1zdGltLTAwMS5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"641\" height=\"217\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm-medtronic-stim-001.png\" class=\"attachment-large size-large wp-image-4252\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm-medtronic-stim-001.png 641w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm-medtronic-stim-001-300x102.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/pm-medtronic-stim-001-18x6.png 18w\" sizes=\"(max-width: 641px) 100vw, 641px\" \/>\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-f8cef69 elementor-widget elementor-widget-text-editor\" data-id=\"f8cef69\" 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><h4><strong>Contr\u00f4le automatique du seuil atrial (CSA)<\/strong><\/h4><h4>G\u00e9n\u00e9ralit\u00e9s<\/h4><p>Tout comme pour le ventricule, quand le contr\u00f4le de seuil atrial est programm\u00e9 sur <br \/>automatique, une mesure quotidienne du seuil de stimulation atriale est r\u00e9alis\u00e9e avec <br \/>adaptation de la programmation pour les 24 heures qui suivent.<\/p><ul><li>Contr\u00f4le du seuil atrial sur dynamique : mesure quotidienne du seuil de stimulation atriale + adaptation de la programmation pour les 24 heures<\/li><li>Seuil r\u00e9alis\u00e9 syst\u00e9matiquement toutes les 24 heures \u00e0 1h00 du matin<\/li><li>\u00a0Mesure du seuil atrial bas\u00e9e sur la synchronisation des ondes P et R d\u00e9tect\u00e9es (2 m\u00e9thodes en fonction de la pr\u00e9sence ou de l\u2019absence de conduction auriculo-ventriculaire)<\/li><li>\u00a0Une seule mesure quotidienne du seuil atrial avec adaptation pour les 24 heures suivantes sans contr\u00f4le cycle \u00e0 cycle de la capture<\/li><li>Amplitude cible en multipliant la marge de s\u00e9curit\u00e9 en amplitude OD par le seuil mesur\u00e9 \u00e0 une dur\u00e9e d\u2019impulsion de 0,4 ms dans une plage de sortie d\u00e9finie par une limite inf\u00e9rieure programmable (param\u00e8tre Amplitude minimale ajust\u00e9e) et la limite de seuil sup\u00e9rieure de 5,0V et 1,0 ms<\/li><li>Amplitude maximale pouvant \u00eatre d\u00e9livr\u00e9e: 5V pour 1 ms<\/li><li>Contr\u00f4le de capture atriale sur moniteur : mesure du seuil de stimulation atriale sans adaptation<\/li><li>Contr\u00f4le du seuil atrial sur arr\u00eat : valeurs fixes et pas de seuil automatique mesur\u00e9<\/li><\/ul><p><strong>Contr\u00f4le du seuil atrial (CSA) en pratique<\/strong><br \/>Le CSA est disponible lorsque le dispositif fonctionne dans les modes DDD(R) et MVP <br \/>(AAI(R)&lt;=&gt;DDD(R)). Si le mode de stimulation programm\u00e9 est le mode MVP, le dispositif <br \/>commute temporairement pendant la dur\u00e9e de la recherche de seuil de stimulation en <br \/>mode DDD(R).<\/p><ul><li>Le stimulateur \u00e9value si le patient est stimul\u00e9 dans l\u2019oreillette ou s\u2019il y a une d\u00e9tection \u00e0 une fr\u00e9quence lente avec recherche d\u2019une synchronisation des ondes P et R d\u00e9tect\u00e9es<\/li><li>Le CSA s\u00e9lectionne automatiquement l\u2019une des deux m\u00e9thodes suivantes pour \u00e9valuer l\u2019efficacit\u00e9 de la capture atriale en fonction du rythme du patient<\/li><li>\u00a0Si le rythme sinusal du patient est normal et stable, le dispositif s\u00e9lectionne la m\u00e9thode de r\u00e9initialisation de la cavit\u00e9 atriale (RCA) ; dans le cas contraire, le dispositif s\u00e9lectionne la m\u00e9thode de conduction AV (CAV)<\/li><li>\u00a0La r\u00e9initialisation de la cavit\u00e9 atriale (RCA) : il s\u2019agit d\u2019une \u00e9valuation indirecte de la capture atriale (pas d\u2019analyse de la morphologie du signal atrial stimul\u00e9, de la r\u00e9ponse \u00e9voqu\u00e9e atriale) ; la perte de <br \/>capture atriale est diagnostiqu\u00e9e devant la r\u00e9apparition d\u2019une activit\u00e9 atriale spontan\u00e9e} La m\u00e9thode de conduction AV (CAV) est utilis\u00e9e lorsqu\u2019une conduction AV 1:1 stable est mise en \u00e9vidence ; la fr\u00e9quence de stimulation atriale est augment\u00e9e de 15 bpm (sans toutefois d\u00e9passer 101 bpm) et le d\u00e9lai AV est allong\u00e9 ; la perte de capture atriale est diagnostiqu\u00e9e en l\u2019absence de d\u00e9tection <br \/>ventriculaire \u00e0 l\u2019intervalle AP-VS pr\u00e9vu (fen\u00eatre d\u00e9finie \u00e0 partir des intervalles AP-VS pr\u00e9c\u00e9dents avec capture) ; une impulsion de secours est d\u00e9livr\u00e9e pour \u00e9viter toute pause ventriculaire<\/li><li>\u00a0Le test de seuil d\u00e9bute \u00e0 une amplitude inf\u00e9rieure de 0,125V au dernier seuil mesur\u00e9 ; en l\u2019absence de recherche ant\u00e9rieure, une nouvelle recherche commence \u00e0 0,75V<\/li><li>\u00a0Le dispositif diminue l\u2019amplitude par \u00e9tapes de 0,125V jusqu\u2019\u00e0 perte de capture<\/li><li>\u00a0Il augmente alors l\u2019amplitude de test par \u00e9tapes de 0,125V jusqu\u2019\u00e0 obtenir une capture 3 fois de suite; cette amplitude correspond au seuil de stimulation atriale<\/li><\/ul><p><strong>Adaptation automatique de l\u2019amplitude atriale<\/strong><\/p><ul><li>Une seule mesure quotidienne du seuil atrial avec adaptation pour les 24 heures suivantes sans contr\u00f4le cycle \u00e0 cycle de la capture<\/li><li>\u00a0L\u2019amplitude cible repose comme pour le ventricule sur les valeurs programm\u00e9es pour les param\u00e8tres Marge de s\u00e9curit\u00e9 en amplitude A. et Amplitude atriale minimale ajust\u00e9e<\/li><li>\u00a0Le contr\u00f4le du seuil atrial ne permet aucune stimulation atriale \u00e0 des valeurs sup\u00e9rieures \u00e0 5,0 V ou 1,0 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-7abab66 elementor-widget elementor-widget-image\" data-id=\"7abab66\" 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\/2025\/11\/mdt_pm_spec1.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"mdt_pm_spec1\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NDI0OCwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNVwvMTFcL21kdF9wbV9zcGVjMS5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"605\" height=\"479\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/mdt_pm_spec1.png\" class=\"attachment-large size-large wp-image-4248\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/mdt_pm_spec1.png 605w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/mdt_pm_spec1-300x238.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/mdt_pm_spec1-15x12.png 15w\" sizes=\"(max-width: 605px) 100vw, 605px\" \/>\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-273e214 elementor-widget elementor-widget-text-editor\" data-id=\"273e214\" 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-f3adf15 elementor-widget elementor-widget-image\" data-id=\"f3adf15\" 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\/2025\/11\/mdt_pm_spec2.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"mdt_pm_spec2\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NDI0OSwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNVwvMTFcL21kdF9wbV9zcGVjMi5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"541\" height=\"326\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/mdt_pm_spec2.png\" class=\"attachment-large size-large wp-image-4249\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/mdt_pm_spec2.png 541w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/mdt_pm_spec2-300x181.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/mdt_pm_spec2-18x12.png 18w\" sizes=\"(max-width: 541px) 100vw, 541px\" \/>\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-99d8b49 elementor-widget elementor-widget-text-editor\" data-id=\"99d8b49\" 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>A pacing threshold search begins at a test amplitude 0.125 V below the last measurement. In absence\u00a0of such, a new search begins at an amplitude of 0.75 V. The device keeps lowering the pulse strength\u00a0in 0.125 V steps until it reaches a test amplitude that is below the capture threshold. The test pulse is\u00a0then increased in 0.125 V steps until a same test amplitude has been classified as above the pacing\u00a0threshold 3 times consecutively, defining the RA capture threshold. The target amplitude is based on\u00a0the programmed settings for the Atrial Amplitude Safety Margin and the Atrial Minimum Adapted\u00a0Amplitude parameters.<\/p><p>Capture Management does not program atrial outputs &gt;5.0 V or 1.0 ms. If the patient needs a higher\u00a0pacing output, the amplitude and pulse width must be programmed manually.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2b34168 elementor-widget elementor-widget-heading\" data-id=\"2b34168\" 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\">Sensing<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-aced483 elementor-widget elementor-widget-text-editor\" data-id=\"aced483\" 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><strong>G\u00e9n\u00e9ralit\u00e9s<\/strong> <br \/>Pour les dispositifs les plus r\u00e9cents, la d\u00e9tection est forc\u00e9ment adaptative (non <br \/>modifiable) si une d\u00e9tection bipolaire est programm\u00e9e et forc\u00e9ment fixe si une d\u00e9tection <br \/>unipolaire est programm\u00e9e.<br \/>Si la d\u00e9tection est automatique, apr\u00e8s une d\u00e9tection ventriculaire, la valeur du seuil s\u2019ajuste \u00e0 75% de l\u2019onde R (maximum 8 x la valeur programm\u00e9e) puis suit une d\u00e9croissance dans le temps (450 ms) pour atteindre la sensibilit\u00e9 programm\u00e9e (valeur nominale 0,9 mV).<br \/>Apr\u00e8s une stimulation ventriculaire, la sensibilit\u00e9 aux \u00e9v\u00e8nements ventriculaires reste <br \/>inchang\u00e9e et le dispositif est moins sensible aux \u00e9v\u00e8nements auriculaires.<br \/>Apr\u00e8s une d\u00e9tection auriculaire, la valeur du seuil s\u2019ajuste \u00e0 75% de l\u2019onde P (maximum 8 x valeur programm\u00e9e) puis suit une d\u00e9croissance dans le temps (200 ms) pour atteindre la sensibilit\u00e9 programm\u00e9e (valeur nominale 0,3 mV).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1e1c3f3 elementor-widget elementor-widget-image\" data-id=\"1e1c3f3\" 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\/2025\/11\/mdt_pm_spec3.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"mdt_pm_spec3\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NDI1MCwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNVwvMTFcL21kdF9wbV9zcGVjMy5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"454\" height=\"248\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/mdt_pm_spec3.png\" class=\"attachment-large size-large wp-image-4250\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/mdt_pm_spec3.png 454w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/mdt_pm_spec3-300x164.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/mdt_pm_spec3-18x10.png 18w\" sizes=\"(max-width: 454px) 100vw, 454px\" \/>\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-e3ab24a elementor-widget elementor-widget-text-editor\" data-id=\"e3ab24a\" 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-0e22b5e elementor-widget elementor-widget-image\" data-id=\"0e22b5e\" 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\/2025\/11\/mdt_pm_spec4.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"mdt_pm_spec4\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NDI1MSwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNVwvMTFcL21kdF9wbV9zcGVjNC5wbmcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"631\" height=\"403\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/mdt_pm_spec4.png\" class=\"attachment-large size-large wp-image-4251\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/mdt_pm_spec4.png 631w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/mdt_pm_spec4-300x192.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/mdt_pm_spec4-18x12.png 18w\" sizes=\"(max-width: 631px) 100vw, 631px\" \/>\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-0da24bc elementor-widget elementor-widget-text-editor\" data-id=\"0da24bc\" 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>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Medtronic &#8211; Pacing &amp; sensing Content Atrial and ventricular autothreshold A pacing threshold search begins at a test amplitude 0.125 V below the last measurement. In absence\u00a0of such, a new search begins at an amplitude of 0.75 V. The device keeps lowering the pulse strength\u00a0in 0.125 V steps until it reaches a test amplitude that [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":49,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-777","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>Medtronic Pacemaker Pacing &amp; Sensing Guide | ECG | Cardiocases<\/title>\n<meta name=\"description\" content=\"Understand Medtronic pacemaker pacing &amp; sensing: output, sensitivity, lead parameters &amp; ECG interpretation \u2014 real device tracings &amp; programming examples.\" \/>\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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