{"id":711,"date":"2025-07-31T14:11:22","date_gmt":"2025-07-31T14:11:22","guid":{"rendered":"https:\/\/cardiocases.com\/?page_id=711"},"modified":"2025-11-18T16:06:38","modified_gmt":"2025-11-18T16:06:38","slug":"sensing-boston-scientific","status":"publish","type":"page","link":"https:\/\/cardiocases.com\/fr\/pacing-defibrillation\/devices-per-company\/boston-scientific\/sensing-boston-scientific\/","title":{"rendered":"Sensing Boston Scientific"},"content":{"rendered":"<div data-elementor-type=\"wp-page\" data-elementor-id=\"711\" class=\"elementor elementor-711\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-43a8508 e-con-full e-flex e-con e-parent\" data-id=\"43a8508\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-69ecb6b elementor-widget elementor-widget-heading\" data-id=\"69ecb6b\" 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 - D\u00e9tection<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f9b693a elementor-toc--minimized-on-tablet elementor-widget elementor-widget-table-of-contents\" data-id=\"f9b693a\" 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__f9b693a\" 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__f9b693a\" 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__f9b693a\" 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-d743b88 elementor-widget elementor-widget-heading\" data-id=\"d743b88\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Sensibilit\u00e9<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d16f27f elementor-widget elementor-widget-text-editor\" data-id=\"d16f27f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Le fonctionnement fiable d'un d\u00e9fibrillateur exige une d\u00e9tection sans faille des signaux rapides et de faible amplitude associ\u00e9s \u00e0 la fibrillation ventriculaire (FV), tout en rejetant les signaux cardiaques autres que le QRS ainsi que tous les signaux extracardiaques. Cela implique la programmation d'une sensibilit\u00e9 \u00e9lev\u00e9e et de p\u00e9riodes r\u00e9fractaires courtes. Contrairement aux stimulateurs cardiaques, le seuil de d\u00e9tection, au lieu d'\u00eatre une valeur fixe programm\u00e9e, est automatiquement adapt\u00e9 \u00e0 l'amplitude de l'onde R pr\u00e9c\u00e9dente. Par la suite, la sensibilit\u00e9 augmente tout au long du cycle cardiaque, \u00e0 la recherche d'un signal de faible amplitude.<\/p><p>Les d\u00e9fibrillateurs sont \u00e9quip\u00e9s d'un contr\u00f4le automatique de gain (CAG) num\u00e9rique charg\u00e9 d'ajuster dynamiquement la sensibilit\u00e9 auriculaire et ventriculaire. Dans les d\u00e9fibrillateurs \u00e0 trois chambres, les canaux auriculaires, ventriculaires droits (RV) et ventriculaires gauches (LV) fonctionnent chacun avec un CAG automatique s\u00e9par\u00e9.<\/p><p>L'AGC auriculaire est nominalement de 0,25 mV ; l'ACG ventriculaire droit est nominalement de 0,60 mV ; l'AGC ventriculaire gauche est nominalement de 1,0 mV.<\/p><p>Les r\u00e9glages programmables sont 0,15, 0,2, 0,25, 0,3, 0,4, 0,5, 0,6, 0,7, 0,8, 0,9, 1,0, 1,5 mV.<\/p><p>Ce chapitre d\u00e9crit la fonction de d\u00e9tection RV, qui joue un r\u00f4le cl\u00e9 dans la d\u00e9tection et le traitement des arythmies ventriculaires. Avant d'\u00eatre mesur\u00e9s, les signaux sont filtr\u00e9s en fonction de leurs fr\u00e9quences. La derni\u00e8re g\u00e9n\u00e9ration de d\u00e9fibrillateurs Boston Scientific utilise une bande passante comprise entre 20 et 85 Hz (la fr\u00e9quence d'une onde T est typiquement comprise entre 0 et 10 Hz). Le signal \u00e9lectrique est converti en valeur num\u00e9rique par un convertisseur 12 bits.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fd81d3a elementor-widget elementor-widget-heading\" data-id=\"fd81d3a\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Contr\u00f4le automatique du gain<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fb52940 elementor-widget elementor-widget-text-editor\" data-id=\"fb52940\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Pour optimiser la d\u00e9tection des signaux rapides et irr\u00e9guliers associ\u00e9s \u00e0 la FV, l'appareil ajuste la sensibilit\u00e9 ventriculaire en fonction d'une CAG lente ou rapide. L'AGC applique une composante \u201clente\u201d pour d\u00e9finir un intervalle de recherche de l'amplitude QRS suivante. En calculant une \u201cmoyenne\u201d des pics des signaux pr\u00e9c\u00e9dents, la composante \u201clente\u201d d\u00e9finit une zone susceptible de contenir le pic suivant, et fixe cette zone entre une valeur minimale et une valeur maximale.<\/p><ul><li>Pointe moyenne (n) = 3\/4 * Pointe moyenne (n-1) + 1\/4 * Pointe (n-1)<br \/>\u00a0<\/li><li>Si n-1 a \u00e9t\u00e9 rythm\u00e9 \u00e0 Cr\u00eate (n-1) = 8 * seuil AGC programm\u00e9<br \/>\u00a0<\/li><li>Maximum (n) = 3\/2 * Pic moyen (n)<br \/>\u00a0<\/li><li>Minimum (n) = 1\/8 * Cr\u00eate moyenne (n)<\/li><\/ul><p>La composante \u201crapide\u201d de l'AGC maintient une valeur de sensibilit\u00e9 \u00e9lev\u00e9e apr\u00e8s avoir d\u00e9tect\u00e9 un \u00e9v\u00e9nement ventriculaire, avant de diminuer progressivement le r\u00e9glage de la sensibilit\u00e9 afin d'augmenter la sensibilit\u00e9 de l'appareil.<\/p><p>Apr\u00e8s la d\u00e9tection d'un signal ventriculaire, il y a une p\u00e9riode r\u00e9fractaire non programmable de 135 ms (50 ms de suppression absolue + 40 ms de bruit + 45 ms de r\u00e9fractaire fixe).<\/p><p>\u00c0 la fin de la p\u00e9riode r\u00e9fractaire + 15 ms, le r\u00e9glage de la sensibilit\u00e9 diminue \u00e0 75% du pic d\u00e9tect\u00e9 ou, si le dernier \u00e9v\u00e9nement ventriculaire est stimul\u00e9, \u00e0 75% du pic moyen. Il est important de noter que la gamme compl\u00e8te de l'onde R est disponible jusqu'\u00e0 32 mV.<\/p><p>L'AGC diminue ensuite le r\u00e9glage de la sensibilit\u00e9 toutes les 35 ms, jusqu'\u00e0 7\/8 du r\u00e9glage pr\u00e9c\u00e9dent. Ce processus d\u00e9cr\u00e9mentiel se poursuit jusqu'\u00e0 ce que la valeur la plus \u00e9lev\u00e9e se situe entre le minimum et le r\u00e9glage de sensibilit\u00e9 programm\u00e9.<\/p><p>Si le dernier \u00e9v\u00e9nement ventriculaire est stimul\u00e9, l'AGC diminue le r\u00e9glage \u00e0 7\/8 de la valeur pr\u00e9c\u00e9dente \u00e0 chaque \u00e9tape suivante, bien que la dur\u00e9e de l'\u00e9tape soit d\u00e9termin\u00e9e par la vitesse de stimulation minimale : la valeur Min (ou le r\u00e9glage de la sensibilit\u00e9 programm\u00e9e) est atteinte 150 ms avant l'\u00e9v\u00e9nement programm\u00e9 suivant qui est stimul\u00e9.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a7b0db4 elementor-widget elementor-widget-image\" data-id=\"a7b0db4\" 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\/11\/sensing_boston_1.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"sensing_boston_1\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NTU0OSwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNVwvMTFcL3NlbnNpbmdfYm9zdG9uXzEucG5nIn0%3D\">\n\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"532\" height=\"328\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/sensing_boston_1.png\" class=\"attachment-large size-large wp-image-5549\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/sensing_boston_1.png 532w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/sensing_boston_1-300x185.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/sensing_boston_1-18x12.png 18w\" sizes=\"(max-width: 532px) 100vw, 532px\" \/>\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-8123968 elementor-widget elementor-widget-heading\" data-id=\"8123968\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Zones de d\u00e9tection<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7fcb48d elementor-widget elementor-widget-text-editor\" data-id=\"7fcb48d\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Le choix des zones de fr\u00e9quence cardiaque d\u00e9terminant les interventions d'un d\u00e9fibrillateur est une \u00e9tape critique de sa programmation. Les d\u00e9fibrillateurs les plus modernes permettent de programmer plusieurs zones de d\u00e9tection des arythmies en fonction des intervalles RR mesur\u00e9s. Chaque zone est associ\u00e9e \u00e0 une programmation sp\u00e9cifique de la discrimination des tachycardies et des th\u00e9rapies. Le nombre de zones et la gamme de fr\u00e9quences cardiaques programm\u00e9es doivent \u00eatre adapt\u00e9s aux caract\u00e9ristiques, aux ant\u00e9c\u00e9dents et \u00e0 l'indication d'implantation de chaque patient. Dans un d\u00e9fibrillateur Boston Scientific, 1, 2 ou 3 zones de d\u00e9tection peuvent \u00eatre programm\u00e9es.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e8c4f07 elementor-widget elementor-widget-image\" data-id=\"e8c4f07\" 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\/11\/boston_sensing_a.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"boston_sensing_a\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NTU0OCwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNVwvMTFcL2Jvc3Rvbl9zZW5zaW5nX2EucG5nIn0%3D\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"462\" height=\"382\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/boston_sensing_a.png\" class=\"attachment-large size-large wp-image-5548\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/boston_sensing_a.png 462w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/boston_sensing_a-300x248.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/boston_sensing_a-15x12.png 15w\" sizes=\"(max-width: 462px) 100vw, 462px\" \/>\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-4f0b722 elementor-widget elementor-widget-text-editor\" data-id=\"4f0b722\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Les seuils des zones adjacentes de fr\u00e9quence cardiaque doivent diff\u00e9rer d'au moins 20 bpm.<\/p><p>Dans les d\u00e9fibrillateurs \u00e0 double ou triple chambre, le seuil de fr\u00e9quence de la tachycardie ventriculaire (TV) doit \u00eatre \u22655 bpm plus rapide que la fr\u00e9quence maximale de suivi (MTR) et la fr\u00e9quence maximale du capteur (MSR).<\/p><p>Dans un d\u00e9fibrillateur \u00e0 chambre unique, le seuil de fr\u00e9quence de la TV doit \u00eatre \u226515 bpm plus rapide que la limite inf\u00e9rieure de fr\u00e9quence (LIR).<\/p><p><a><em><strong>Pr\u00e9vention secondaire<\/strong><\/em><\/a>\u00a0Chez un patient souffrant d'insuffisance cardiaque, les zones de fr\u00e9quence sont programm\u00e9es en fonction du cycle de la tachycardie ventriculaire qui a motiv\u00e9 l'implantation du dispositif. La limite inf\u00e9rieure d'une zone de tachycardie est g\u00e9n\u00e9ralement programm\u00e9e 20 bpm plus lentement que la tachycardie clinique, car l'introduction ou l'intensification d'un traitement antiarythmique apr\u00e8s l'implantation peut ralentir le rythme de la tachycardie.\u00a0<\/p><p><a><em><strong>Pr\u00e9vention primaire<\/strong><\/em><\/a><em><strong>\u00a0<\/strong><\/em>Dans le cas des patients souffrant d'insuffisance cardiaque, la probabilit\u00e9 de d\u00e9velopper une tachycardie ventriculaire apr\u00e8s l'implantation du dispositif est \u00e9lev\u00e9e, ce qui justifie probablement la programmation de deux zones de d\u00e9tection et de traitement de la tachycardie ventriculaire, en plus de la programmation de la zone de fibrillation ventriculaire. La principale justification de la programmation de 2 zones distinctes de TV est la capacit\u00e9 de traiter sp\u00e9cifiquement les tachycardies tr\u00e8s rapides en favorisant la stimulation antitachycardique indolore (ATP) plut\u00f4t que l'administration de chocs \u00e9lectriques. Ceci a \u00e9t\u00e9 confirm\u00e9 dans les \u00e9tudes cliniques PAIN FREE I et PAIN FREE II, o\u00f9 3 chocs sur 4 ont \u00e9t\u00e9 \u00e9vit\u00e9s par la stimulation antitachycardique dans la zone de tachycardie rapide, sans augmenter de mani\u00e8re significative l'incidence des \u00e9v\u00e9nements ind\u00e9sirables, tout en am\u00e9liorant de mani\u00e8re significative la qualit\u00e9 de vie.\u00a0<\/p><p><a><em><strong>Chez un patient pr\u00e9sentant un bloc auriculo-ventriculaire complet<\/strong><\/em><\/a><em><strong>\u00a0:<\/strong><\/em>\u00a0le risque de traitement inappropri\u00e9 d\u00fb \u00e0 une tachycardie supraventriculaire avec conduction auriculo-ventriculaire 1:1 est inexistant, ce qui permet de mettre en place des interventions par le dispositif \u00e0 des fr\u00e9quences cardiaques relativement lentes sans compromettre sa sp\u00e9cificit\u00e9. Chez ces patients, ces algorithmes de discrimination sont inutiles puisque toutes les tachycardies spontan\u00e9es sont d'origine ventriculaire.<\/p><p><em><strong>Chez un patient jeune et physiquement actif<\/strong><\/em><em><strong>\u00a0:<\/strong><\/em>\u00a0le risque d'une th\u00e9rapie inappropri\u00e9e provoqu\u00e9e par une acc\u00e9l\u00e9ration physiologique de la fr\u00e9quence cardiaque ou par une fibrillation auriculaire avec conduction auriculo-ventriculaire rapide doit \u00eatre pris en compte dans la d\u00e9cision de programmer plusieurs zones d'intervention, tout en limitant la probabilit\u00e9 de chevauchement entre les fr\u00e9quences d'intervention du d\u00e9fibrillateur et les fr\u00e9quences physiologiques du patient.<\/p><p><em><strong>Chez un patient pr\u00e9sentant un syndrome de Brugada\u00a0<\/strong><strong>:<\/strong><\/em> le risque de TV organis\u00e9e est extr\u00eamement faible, alors que le risque de fibrillation auriculaire est \u00e9lev\u00e9. Par cons\u00e9quent, la programmation d'une zone de d\u00e9tection et de traitement de la TV, en plus d'une zone de FV, est probablement non seulement inutile mais aussi risqu\u00e9e. La programmation d'une zone suppl\u00e9mentaire de surveillance permet seulement d'enregistrer d'\u00e9ventuelles tachyarythmies \u00e0 des fr\u00e9quences plus faibles et d'adapter la programmation. Une seule zone de FV relativement \u00e9lev\u00e9e (&gt;220 bpm) est g\u00e9n\u00e9ralement programm\u00e9e avec une limite basse.\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0696b43 elementor-widget elementor-widget-heading\" data-id=\"0696b43\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">D\u00e9tection d'un \u00e9pisode d'arythmie ventriculaire<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7e7b338 elementor-widget elementor-widget-text-editor\" data-id=\"7e7b338\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Pour d\u00e9clencher l'enregistrement d'une arythmie, 3 cycles cons\u00e9cutifs doivent se situer \u00e0 l'int\u00e9rieur d'une des zones de tachycardie. L'appareil utilise ensuite une fen\u00eatre coulissante, o\u00f9 il recherche l'occurrence de 8 cycles rapides cons\u00e9cutifs sur 10. Les 3 premiers cycles sont int\u00e9gr\u00e9s dans cette fen\u00eatre. Lorsque ce crit\u00e8re est satisfait, un marqueur \u201cV-Epsd\u201d appara\u00eet sur le trac\u00e9, ce qui marque le d\u00e9but de l'enregistrement.\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-dfd3eb4 elementor-widget elementor-widget-image\" data-id=\"dfd3eb4\" 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\/11\/sensing_boston_2.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"sensing_boston_2\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NTU1MCwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNVwvMTFcL3NlbnNpbmdfYm9zdG9uXzIucG5nIn0%3D\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"497\" height=\"509\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/sensing_boston_2.png\" class=\"attachment-large size-large wp-image-5550\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/sensing_boston_2.png 497w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/sensing_boston_2-293x300.png 293w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/sensing_boston_2-12x12.png 12w\" sizes=\"(max-width: 497px) 100vw, 497px\" \/>\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-3c5673f elementor-widget elementor-widget-text-editor\" data-id=\"3c5673f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Si plusieurs zones de d\u00e9tection sont programm\u00e9es, chaque zone a sa propre fen\u00eatre de d\u00e9tection. Un cycle tombant dans une zone plus rapide (VF pour VT par exemple) incr\u00e9mente le compteur de sa zone (VF) ainsi que de la zone plus lente (VT et VT-1). Lorsque le crit\u00e8re de 8 cycles courts sur 10 est rempli pour l'une des zones, le crit\u00e8re de d\u00e9tection initiale est rempli.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3ed60a8 elementor-widget elementor-widget-image\" data-id=\"3ed60a8\" 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\/11\/sensing_boston_3.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"sensing_boston_3\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NTU1MSwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNVwvMTFcL3NlbnNpbmdfYm9zdG9uXzMucG5nIn0%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"511\" height=\"551\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/sensing_boston_3.png\" class=\"attachment-large size-large wp-image-5551\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/sensing_boston_3.png 511w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/sensing_boston_3-278x300.png 278w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/sensing_boston_3-11x12.png 11w\" sizes=\"(max-width: 511px) 100vw, 511px\" \/>\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-6cf5ebf elementor-widget elementor-widget-text-editor\" data-id=\"6cf5ebf\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Un \u00e9pisode est consid\u00e9r\u00e9 comme soutenu si une proportion de \u22656 cycles courts sur 10 est maintenue pendant toute sa dur\u00e9e. Si, jusqu'\u00e0 la fin, un rapport \u22656 sur 10 cycles a persist\u00e9, l'\u00e9pisode est class\u00e9 comme TV, tachycardie supraventriculaire ou FV. \u00c0 l'expiration du minuteur de dur\u00e9e, le dernier intervalle ventriculaire est analys\u00e9 pour d\u00e9terminer si la tachyarythmie est rest\u00e9e stable, a ralenti ou s'est acc\u00e9l\u00e9r\u00e9e. Si la dur\u00e9e de ce dernier cycle se situe dans la zone de la dur\u00e9e arythmique qui vient d'expirer, la d\u00e9tection est satisfaite et le(s) traitement(s) peut (peuvent) \u00eatre administr\u00e9(s).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fe18a0b elementor-widget elementor-widget-image\" data-id=\"fe18a0b\" 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\/11\/sensing_boston_4.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"sensing_boston_4\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NTU1MiwidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNVwvMTFcL3NlbnNpbmdfYm9zdG9uXzQucG5nIn0%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"482\" height=\"161\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/sensing_boston_4.png\" class=\"attachment-large size-large wp-image-5552\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/sensing_boston_4.png 482w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/sensing_boston_4-300x100.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/sensing_boston_4-18x6.png 18w\" sizes=\"(max-width: 482px) 100vw, 482px\" \/>\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-4c80f55 elementor-widget elementor-widget-text-editor\" data-id=\"4c80f55\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Si la dur\u00e9e du dernier intervalle n'est pas dans la zone de la dur\u00e9e arythmique qui vient d'expirer, l'analyse se poursuit jusqu'\u00e0 ce que :<\/p><ul><li>une longueur de cycle est mesur\u00e9e qui correspond \u00e0 la zone de la Dur\u00e9e qui vient d'expirer<br \/>\u00a0<\/li><li>la dur\u00e9e d'une zone plus rapide est \u00e9coul\u00e9e<br \/>\u00a0<\/li><li>&lt;6 cycles courts sur 10 sont d\u00e9tect\u00e9s (le traitement n&#039;est pas administr\u00e9 et une nouvelle fen\u00eatre roulante est analys\u00e9e \u00e0 la recherche du crit\u00e8re de 8 cycles sur 10).<\/li><\/ul><p>\u00a0<\/p><p>Des dur\u00e9es diff\u00e9rentes peuvent \u00eatre programm\u00e9es pour chaque zone de d\u00e9tection. La dur\u00e9e de chaque zone expire ind\u00e9pendamment l'une de l'autre. La dur\u00e9e des zones les plus rapides doit \u00eatre inf\u00e9rieure (ou \u00e9gale) \u00e0 celle des zones les plus lentes. Si le crit\u00e8re de 8 sur 10 est rempli pour la zone VT, alors pour la zone VF, les deux dur\u00e9es se poursuivent en parall\u00e8le. Si la dur\u00e9e de la zone VT expire alors que la dur\u00e9e de la zone VF est en cours (crit\u00e8re de 6 sur 10 rempli dans la zone VF), aucune th\u00e9rapie n'est d\u00e9livr\u00e9e avant la fin de la dur\u00e9e de la zone VF. Lorsque le crit\u00e8re des 6 sur 10 n'est plus rempli pour la zone VF, les th\u00e9rapies de la zone VT sont administr\u00e9es.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ff38a76 elementor-widget elementor-widget-image\" data-id=\"ff38a76\" 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\/11\/sensing_boston_5.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"sensing_boston_5\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NTU1MywidXJsIjoiaHR0cHM6XC9cL2NhcmRpb2Nhc2VzLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNVwvMTFcL3NlbnNpbmdfYm9zdG9uXzUucG5nIn0%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"505\" height=\"187\" src=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/sensing_boston_5.png\" class=\"attachment-large size-large wp-image-5553\" alt=\"\" srcset=\"https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/sensing_boston_5.png 505w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/sensing_boston_5-300x111.png 300w, https:\/\/cardiocases.com\/wp-content\/uploads\/2025\/11\/sensing_boston_5-18x7.png 18w\" sizes=\"(max-width: 505px) 100vw, 505px\" \/>\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-335ff26 elementor-widget elementor-widget-text-editor\" data-id=\"335ff26\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Si le crit\u00e8re initial de 8 cycles courts sur 10 n'est pas rempli, ou si le crit\u00e8re de 6 cycles courts sur 10 pendant la dur\u00e9e n'est pas rempli, l'\u00e9pisode est class\u00e9 comme TV non soutenue (NS). Si le crit\u00e8re des 6 cycles courts sur 10 n'est pas v\u00e9rifi\u00e9, une nouvelle fen\u00eatre coulissante \u00e0 la recherche de 8 cycles courts commence.<\/p><p>La fin d'un \u00e9pisode est d\u00e9clar\u00e9e apr\u00e8s une dur\u00e9e pendant laquelle le crit\u00e8re de red\u00e9tection de 8 sur 10 n'est pas rempli :<\/p><ul><li>10 secondes apr\u00e8s les \u00e9v\u00e9nements non trait\u00e9s, trait\u00e9s par l'ATP, ou apr\u00e8s un choc avort\u00e9\u00a0<br \/>\u00a0<\/li><li>30 secondes apr\u00e8s un choc interrompu\u00a0<\/li><\/ul>\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; Sensing Content Sensitivity The reliable function of a defibrillator mandates a flawless detection of the rapid, low-amplitude signals associated with ventricular fibrillation (VF), while rejecting the cardiac signals besides the QRS as well as all extra-cardiac signals. This implies the programming of a high sensitivity and short refractory periods. Unlike in cardiac [&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-711","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 Sensing Parameters | Cardiocases<\/title>\n<meta name=\"description\" content=\"Boston Scientific ICD sensing \u2014 sensitivity, detection, near\/far-field &amp; ECG tracings. 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