{"id":36781,"date":"1998-01-01T00:00:00","date_gmt":"1998-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/contribucion-al-analisis-tiempo-frecuencia-en-electrocardiografia-de-alta-resolucion\/"},"modified":"1998-01-01T00:00:00","modified_gmt":"1998-01-01T00:00:00","slug":"contribucion-al-analisis-tiempo-frecuencia-en-electrocardiografia-de-alta-resolucion","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/matematicas\/contribucion-al-analisis-tiempo-frecuencia-en-electrocardiografia-de-alta-resolucion\/","title":{"rendered":"Contribucion al analisis tiempo-frecuencia en electrocardiografia de alta resolucion."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Marco Antonio Reyna Carranza <\/strong><\/h2>\n<p>Existen m\u00e9todos para la detecci\u00f3n de taquicardia ventricular (tv) en pacientes linfartados (pi), los mejores son invasivos. Los no-invasivos tienen mayor inter\u00e9s porque evitan la intervenci\u00f3n al paciente pero sus valores predictivos (vp) son bajos. El promediado de se\u00f1ales mejora la relaci\u00f3n se\u00f1al\/ruido permitiendo detectar componentes de bajas amplitudes que no se identifican con el ecg est\u00e1ndar. El objetivo es identificar componentes ecg, como indicadores para predecir riesgo de tv.  los potenciales tard\u00edos ventriculares (ptvs) se consideran indicadores de riesgo importantes. Los m\u00e9todos m\u00e1s usados (temporal, frecuencial, espectro-temporal) cuantifican ptvs. En los \u00faltimos a\u00f1os aparecen m\u00e9todos que detectan potenciales anormales en todo el qrs. A\u00fan no existe m\u00e9todo que detecte de forma \u00f3ptima anormalidades de conducci\u00f3n ventricular.  se proponen las siguientes metodolog\u00edas para mejorar resultados en la predicci\u00f3n de riesgo de tv:  i). Se aplic\u00f3 la distribuci\u00f3n wigner (wd) como t\u00e9cnica indirecta de detecci\u00f3n de potenciales anormales. Sobre el plano tiempo-frecuencia (ptf) se midi\u00f3 la energ\u00eda que producen los tcs que generan los componentes atenuados de alta frecuencia dentro del qrs.  ii). Con la distribuci\u00f3n choi-williams (chwd) se cuantific\u00f3 la energ\u00eda que producen los tcs sobre la porci\u00f3n terminal del qrs.  iii). Se mejor\u00f3 el m\u00e9todo de la transformada wavelet continua, emple\u00e1ndose 4 wavelets morfol\u00f3gicamente semejantes a los potenciales ventriculares anormales (pvas) aumentando la robustez del m\u00e9todo.  iv). Se aplicaron krgo por segmentos sobre la porci\u00f3n terminal del qrs y sobre el inicio del segmento st, obteni\u00e9ndose una rtf dependiente de se\u00f1al por cada segmento analizado.  v). Se analiz\u00f3 la base de datos lar-vt por cada m\u00e9todo tiempo-frecuencia y por el m\u00e9todo del dominio temporal.  vi). Se obtuvieron vps por m\u00e9todo, y combinando los \u00edndices del m\u00e9todo del dominio tempo<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Contribucion al analisis tiempo-frecuencia en electrocardiografia de alta resolucion.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Contribucion al analisis tiempo-frecuencia en electrocardiografia de alta resolucion. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Marco Antonio Reyna Carranza <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de catalunya<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1998<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Raimon Jan\u00e9 Campos<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Pere Caminal Magrans <\/li>\n<li>Pablo Laguna Lasaosa (vocal)<\/li>\n<li>Antonio Bayes De Luna (vocal)<\/li>\n<li> Guerrero Martinez Juan  Fco. (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Marco Antonio Reyna Carranza Existen m\u00e9todos para la detecci\u00f3n de taquicardia ventricular (tv) en pacientes linfartados (pi), [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"footnotes":""},"categories":[1890,332,15966,126,15596,925],"tags":[20463,97089,97088,42598,14097,59740],"class_list":["post-36781","post","type-post","status-publish","format-standard","hentry","category-ciencia-de-los-ordenadores","category-ciencias-tecnologicas","category-computacion-digital","category-matematicas","category-politecnica-de-catalunya","category-tecnologia-medica","tag-antonio-bayes-de-luna","tag-guerrero-Martinez-juan-fco","tag-marco-antonio-reyna-carranza","tag-pablo-laguna-lasaosa","tag-pere-caminal-magrans","tag-raimon-jane-campos"],"_links":{"self":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/36781","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/comments?post=36781"}],"version-history":[{"count":0,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/36781\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/media?parent=36781"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/categories?post=36781"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/tags?post=36781"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}