{"id":5847,"date":"2025-11-17T19:07:24","date_gmt":"2025-11-17T19:07:24","guid":{"rendered":"https:\/\/cardiocases.com\/?page_id=5847"},"modified":"2025-11-17T19:12:03","modified_gmt":"2025-11-17T19:12:03","slug":"oversensing-boston-scientific","status":"publish","type":"page","link":"https:\/\/cardiocases.com\/fr\/pacing-defibrillation\/devices-per-company\/boston-scientific\/oversensing-boston-scientific\/","title":{"rendered":"Oversensing Boston Scientific"},"content":{"rendered":"<div data-elementor-type=\"wp-page\" data-elementor-id=\"5847\" class=\"elementor elementor-5847\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-fe6be87 e-con-full e-flex e-con e-parent\" data-id=\"fe6be87\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b4881fa elementor-widget elementor-widget-heading\" data-id=\"b4881fa\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Boston Scientific - La surd\u00e9livrance<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2a177cc elementor-toc--minimized-on-tablet elementor-widget elementor-widget-table-of-contents\" data-id=\"2a177cc\" data-element_type=\"widget\" data-settings=\"{&quot;headings_by_tags&quot;:[&quot;h3&quot;,&quot;h4&quot;,&quot;h5&quot;],&quot;exclude_headings_by_selector&quot;:[],&quot;no_headings_message&quot;:&quot;No headings were found on this page.&quot;,&quot;marker_view&quot;:&quot;bullets&quot;,&quot;icon&quot;:{&quot;value&quot;:&quot;fas fa-circle&quot;,&quot;library&quot;:&quot;fa-solid&quot;,&quot;rendered_tag&quot;:&quot;&lt;svg class=\\&quot;e-font-icon-svg e-fas-circle\\&quot; viewBox=\\&quot;0 0 512 512\\&quot; xmlns=\\&quot;http:\\\/\\\/www.w3.org\\\/2000\\\/svg\\&quot;&gt;&lt;path d=\\&quot;M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8z\\&quot;&gt;&lt;\\\/path&gt;&lt;\\\/svg&gt;&quot;},&quot;minimize_box&quot;:&quot;yes&quot;,&quot;minimized_on&quot;:&quot;tablet&quot;,&quot;hierarchical_view&quot;:&quot;yes&quot;,&quot;min_height&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"table-of-contents.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__header\">\n\t\t\t\t\t\t<h4 class=\"elementor-toc__header-title\">\n\t\t\t\tG\u00e9n\u00e9ralit\u00e9s\t\t\t<\/h4>\n\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--expand\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__2a177cc\" 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__2a177cc\" 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__2a177cc\" 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-ef8794e elementor-widget elementor-widget-heading\" data-id=\"ef8794e\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Surd\u00e9tection d'un signal de 50 Hz<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-48553ce elementor-widget elementor-widget-text-editor\" data-id=\"48553ce\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Les caract\u00e9ristiques habituelles observ\u00e9es chez les patients pr\u00e9sentant une surd\u00e9tection d'un signal de 50 Hz sont les suivantes : 1) exposition \u00e0 une source \u00e9mettrice au moment de l'\u00e9pisode (par exemple un appareil m\u00e9nager mal isol\u00e9), et 2) signaux courts, r\u00e9guliers et ininterrompus tout au long du cycle cardiaque. En modifiant la vitesse de balayage, les d\u00e9fibrillateurs Boston Scientific permettent de mettre en \u00e9vidence une forme d'onde sinuso\u00efdale caract\u00e9ristique avec une s\u00e9paration de 20 ms entre chaque signal ; dans les d\u00e9fibrillateurs \u00e0 double ou triple chambre, les signaux sont g\u00e9n\u00e9ralement visibles sur les canaux auriculaires, VR et LV et haute tension. Leur amplitude est plus importante sur le canal haute tension que sur le canal de d\u00e9tection. Ils sont g\u00e9r\u00e9s a) en identifiant leur source et b) en \u00e9vitant l'utilisation d'appareils mal mis \u00e0 la terre.<\/p><p>Il est possible de programmer un mode de r\u00e9ponse au bruit, qui est activ\u00e9 lorsque le bruit est prolong\u00e9 et diagnostiqu\u00e9 par l'appareil. Cet algorithme est d\u00e9clench\u00e9 par des signaux d\u00e9tect\u00e9s dans la fen\u00eatre de bruit de la p\u00e9riode de suppression ventriculaire. Le trac\u00e9 affiche les marqueurs de bruit AN, VN, RVN ou LVN, tandis que les marqueurs AP-Ns, VP-Ns, RVP-Ns et LVP-Ns indiquent une stimulation asynchrone en r\u00e9ponse \u00e0 la d\u00e9tection d'un bruit continu. Un mode de stimulation asynchrone (AOO, VOO ou DOO) ou inhibiteur (OOO) peut \u00e9galement \u00eatre programm\u00e9.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bcf3266 elementor-widget elementor-widget-heading\" data-id=\"bcf3266\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Surd\u00e9tection et utilisation d'un bistouri \u00e9lectrique<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0a045df elementor-widget elementor-widget-text-editor\" data-id=\"0a045df\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Pour \u00e9viter l'administration de th\u00e9rapies inappropri\u00e9es en raison de l'utilisation d'un scalpel \u00e9lectrique par le chirurgien, deux choix \u00e9taient possibles : 1) placer un aimant sur le g\u00e9n\u00e9rateur d'impulsions ; la r\u00e9ponse \u00e0 l'aimant peut \u00eatre programm\u00e9e en a) position OFF (l'aimant n'a pas d'effet), auquel cas les \u00e9lectrogrammes (EGM) sont enregistr\u00e9s, bien qu'aucune th\u00e9rapie ne soit d\u00e9livr\u00e9e, ou b) mode Tachy (pas de th\u00e9rapie et pas d'enregistrement d'EGM), ou 2) modifier la programmation ; le mode Tachy peut \u00eatre programm\u00e9 sur le moniteur uniquement ou sur OFF. Un mode de protection contre l'\u00e9lectrocaut\u00e8re est \u00e9galement disponible lorsqu'un bistouri \u00e9lectrique est utilis\u00e9. Il emp\u00eache l'administration de th\u00e9rapies inappropri\u00e9es (mode Tachy en position OFF) mais permet \u00e9galement une stimulation asynchrone (AOO, VOO ou DOO) qui peut \u00eatre un avantage pour les patients d\u00e9pendant d'un stimulateur cardiaque. La surveillance oscilloscopique doit se poursuivre tout au long de la proc\u00e9dure, car le patient n'est plus prot\u00e9g\u00e9 par le d\u00e9fibrillateur. L'application d'un aimant ne doit pas emp\u00eacher une interrogation postop\u00e9ratoire compl\u00e8te du dispositif.\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f21cfc6 elementor-widget elementor-widget-heading\" data-id=\"f21cfc6\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Dysfonction de sonde<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4a60ff4 elementor-widget elementor-widget-text-editor\" data-id=\"4a60ff4\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Une imp\u00e9dance anormale ou un trac\u00e9 montrant des cycles intermittents, courts et d\u00e9sorganis\u00e9s, d'amplitude variable, est \u00e9vocateur d'un dysfonctionnement de la sonde. La t\u00e9l\u00e9surveillance permet un diagnostic pr\u00e9coce, ce qui peut emp\u00eacher l'administration de th\u00e9rapies inappropri\u00e9es. Un diagnostic pr\u00e9coce peut \u00e9viter une succession de charges inappropri\u00e9es qui, m\u00eame lorsqu'elles sont interrompues, consomment de l'\u00e9nergie et peuvent r\u00e9duire consid\u00e9rablement la dur\u00e9e de vie de l'appareil. Un mouvement particulier du bras ou de l'\u00e9paule peut reproduire une surd\u00e9tection. Une faible valeur d'imp\u00e9dance sugg\u00e8re une rupture d'isolation, tandis qu'une valeur plus \u00e9lev\u00e9e sugg\u00e8re une rupture du conducteur. Il est important de d\u00e9tecter les variations soudaines des courbes d'imp\u00e9dance, m\u00eame lorsque leurs valeurs restent dans les limites normales.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9161c25 elementor-widget elementor-widget-heading\" data-id=\"9161c25\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Surd\u00e9tection des ondes P<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-30254c2 elementor-widget elementor-widget-text-editor\" data-id=\"30254c2\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>La surd\u00e9tection de l'arythmie auriculaire par le canal ventriculaire peut provoquer des pauses, car le rythme rapide surd\u00e9tect\u00e9 inhibe la stimulation ventriculaire. Les patients peuvent pr\u00e9senter des vertiges r\u00e9currents dus \u00e0 ces \u00e9pisodes. Une premi\u00e8re solution consiste \u00e0 abaisser la sensibilit\u00e9 ventriculaire pour \u00e9viter la surdensit\u00e9 de l'activit\u00e9 auriculaire. Cette programmation peut toutefois \u00eatre associ\u00e9e au risque d'une v\u00e9ritable sous-d\u00e9tection de la FV. Une nouvelle induction de FV serait n\u00e9cessaire pour confirmer la fiabilit\u00e9 de la d\u00e9tection avec la programmation de cette nouvelle valeur de sensibilit\u00e9. Une deuxi\u00e8me option consiste \u00e0 placer une nouvelle sonde.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-becf00b elementor-widget elementor-widget-heading\" data-id=\"becf00b\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Surd\u00e9tection des myopotentielles diaphragmatiques<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-30d39bd elementor-widget elementor-widget-text-editor\" data-id=\"30d39bd\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>La surd\u00e9tection des myopotentiels diaphragmatiques est sugg\u00e9r\u00e9e par la pr\u00e9sence de signaux de faible amplitude, plus visibles au niveau du canal de d\u00e9tection et souvent absents au niveau du canal de haute tension. La surdensit\u00e9 se produit le plus souvent apr\u00e8s une longue diastole ou un \u00e9v\u00e9nement ventriculaire rythm\u00e9, lorsque le gain et la sensibilit\u00e9 sont maximaux.  Chez les patients d\u00e9pendant d'un stimulateur cardiaque, la stimulation ventriculaire peut \u00eatre suivie d'une surd\u00e9tection prolong\u00e9e qui inhibe la stimulation et provoque une syncope. Les choix de programmation consistent g\u00e9n\u00e9ralement \u00e0 abaisser la sensibilit\u00e9 ventriculaire et\/ou \u00e0 augmenter la fr\u00e9quence de stimulation. Une deuxi\u00e8me option consiste \u00e0 placer une nouvelle sonde.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9913f74 elementor-widget elementor-widget-heading\" data-id=\"9913f74\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Surd\u00e9tection de l'onde T<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-56f71a3 elementor-widget elementor-widget-text-editor\" data-id=\"56f71a3\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>La surd\u00e9tection de l'onde T est tr\u00e8s peu fr\u00e9quente dans les appareils de Boston Science. L'incidence est probablement beaucoup plus faible qu'avec les appareils d'autres fabricants. De nombreux m\u00e9decins suivant des patients implant\u00e9s avec un dispositif Boston Science n'ont jamais observ\u00e9 un seul cas de surd\u00e9livrance de l'onde T. Le filtre passe-bande de 20-85 Hz con\u00e7u pour filtrer les ondes T de basse fr\u00e9quence et le bruit musculaire de haute fr\u00e9quence, la sensibilit\u00e9 nominale de 0,6 mV et les caract\u00e9ristiques du circuit de d\u00e9tection peuvent \u00eatre les principales raisons expliquant ce taux tr\u00e8s faible. Les possibilit\u00e9s de reprogrammation sont limit\u00e9es dans ces cas peu fr\u00e9quents de surd\u00e9tection de l'onde T (pas de possibilit\u00e9 de reprogrammer le seuil sup\u00e9rieur, le d\u00e9lai de d\u00e9croissance, les filtres...). La seule possibilit\u00e9 est de modifier la sensibilit\u00e9 ventriculaire et de v\u00e9rifier la d\u00e9tection pr\u00e9cise d'un v\u00e9ritable \u00e9pisode de FV.<\/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>Boston Scientific &#8211; Oversensing Content Oversensing of a 50 Hz signal The usual characteristics observed in patients presenting with oversensing of a 50 Hz signal\u00a0include\u00a01) exposure to an emitting source at the time of the episode (for instance a poorly insulated household appliance), and 2) short, regular, uninterrupted signals throughout the cardiac cycle. By changing [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"parent":51,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-5847","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>Boston Scientific ICD Oversensing | Cardiocases<\/title>\n<meta name=\"description\" content=\"Boston Scientific ICD oversensing \u2014 far-field R-wave, T-wave, lead noise &amp; EMI with real ECG tracings. 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