{"id":145146,"date":"1993-01-01T00:00:00","date_gmt":"1993-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/mapeo-epicardico-y-flujo-coronario-en-la-reperfusion-miocardica-efectos-del-precondicionamiento-isquemico\/"},"modified":"1993-01-01T00:00:00","modified_gmt":"1993-01-01T00:00:00","slug":"mapeo-epicardico-y-flujo-coronario-en-la-reperfusion-miocardica-efectos-del-precondicionamiento-isquemico","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-medicas\/mapeo-epicardico-y-flujo-coronario-en-la-reperfusion-miocardica-efectos-del-precondicionamiento-isquemico\/","title":{"rendered":"Mapeo epicardico y flujo coronario en la reperfusion miocardica. efectos del precondicionamiento isquemico."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Fernando Worner Diz <\/strong><\/h2>\n<p>Con el objetivo de estudiar los efectos del precondicionamiento isquemico sobre el patron electrofisiologico del miocardio isquemico y reperfundido, asi como sobre la respuesta hiperemica en la reperfusion coronaria, se estudiaron 9 cerdos anestesiados con tiopental sodico, a los que se practicaron 4 episodios de isquemia (5 min) y reperfusion (20 min) coronaria. En siete animales mas (grupo control) se llevo a cabo un unico episodio de isquemia\/reperfusion tras un periodo de tiempo de 75 minutos. Las propiedades electrofisiologicas se analizaron a traves del mapeo epicardico por corriente directa gracias a un sistema de registro multiparametrico y un programa informatico especialmente dise\u00f1ados para este trabajo. El flujo coronario se monitorizo mediante un fluximetro electromagnetico.  la primera reperfusion indujo una marcada hiperemia reactiva (flujo basal 11+-4 ml\/min vs 33+-16 ml\/min, p (0,005) y una rapida recuperacion del retraso en el tiempo de activacion local, depresion del segmento tq y elevacion del segmento st en el area isquemica. Esta recuperacion se asocio transitoriamente con un aumento de la variabilidad especial del segmento tq (0=2.5+-0.6 a 3.4+-0.7, p(0,05), elevacion del segmento tq a +1,4+-0,9 mv, y reelevacion del segmento st. Se encontro una breve depresion del segmento tq (-2,3+-0,9 mv) durante la reperfusion, en el 66% de electrodos situados sobre epicardio normal limitrofe con el area en riesgo.  comparando con la primera, la cuarta oclusion indujo: 1) menor elevacion del segmento st (3,4+-2,0 vs 1,7+-1,9 mv, p(0,05). 2) mas rapida recuperacion de la dispersion espacial del segmento tq (53+-21 vs 43+-16 seg, p(0,05), y de la elevacion del segmento st (149+-101 vs 81+-45 seg, p(0.05), 3) menor numero de electrodos afectados en el epicardio normal limitrofe (29 vs 66%, p(0,001) y 4) un menor volumen total de hiperemia (33+-30 ml vs 61+-45 ml, p(0,05) debido fundamentalmente a un acortamiento de su du<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Mapeo epicardico y flujo coronario en la reperfusion miocardica. efectos del precondicionamiento isquemico.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Mapeo epicardico y flujo coronario en la reperfusion miocardica. efectos del precondicionamiento isquemico. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Fernando Worner Diz <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Aut\u00f3noma de barcelona<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1993<\/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>Joan Mar\u00eda Cinca Cuscullola<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Rafael Esteban  Mur <\/li>\n<li>Marcos Murtra Ferrer (vocal)<\/li>\n<li>Antonio Torralba Rodr\u00edguez (vocal)<\/li>\n<li>Enrique Esplugas Oliveras (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Fernando Worner Diz Con el objetivo de estudiar los efectos del precondicionamiento isquemico sobre el patron electrofisiologico [&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 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