<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0212-7199</journal-id>
<journal-title><![CDATA[Anales de Medicina Interna]]></journal-title>
<abbrev-journal-title><![CDATA[An. Med. Interna (Madrid)]]></abbrev-journal-title>
<issn>0212-7199</issn>
<publisher>
<publisher-name><![CDATA[Arán Ediciones, S. L.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0212-71992005000500011</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Controversias en endocarditis infecciosas]]></article-title>
<article-title xml:lang="en"><![CDATA[Controversies in infective endocarditis]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fuente Cid]]></surname>
<given-names><![CDATA[R. de la]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López Rodríguez]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ferreiro Regueiro]]></surname>
<given-names><![CDATA[M. J.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lado Lado]]></surname>
<given-names><![CDATA[F.L.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Hospital Clínico Universitario de Santiago Servicio de Medicina Interna Departamento de Medicina]]></institution>
<addr-line><![CDATA[Santiago de Compostela A Coruña]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>05</month>
<year>2005</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>05</month>
<year>2005</year>
</pub-date>
<volume>22</volume>
<numero>5</numero>
<fpage>244</fpage>
<lpage>247</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_arttext&amp;pid=S0212-71992005000500011&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_abstract&amp;pid=S0212-71992005000500011&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_pdf&amp;pid=S0212-71992005000500011&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[La endocarditis infecciosa se define como la infección de la superficie interna del corazón que afecta principalmente a las válvulas cardíacas aunque también lo puede hacer a los septos, las cuerdas tendinosas o el endocardio mural. Se ha producido una gran controversia entorno a la etiología, diagnóstico y tratamiento de la enfermedad. En este sentido, existen criterios básicos que definen a la endocarditis infecciosa; sin embargo aparecen situaciones particulares en las que resulta imprescindible un estudio minucioso, haciendo especial referencia a los agentes etiológicos y más concretamente a la endocarditis fúngica.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[The infective endocarditis is defined mainly as the infection of the internal surface of the heart, affecting to the cardiac valves although it can also do it to the septos, the tendinosas cords or endocardio mural. Around the origin, the diagnosis and the treatment of the disease, a considerable controversy has taken place. In this sense, basic criteria exist that they define to the infective endocarditis; however, particular situations are appraised in which the meticulous study is essential from the patient, doing special reference to the origin agents and, more in particular, to the fungal endocarditis.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Anticoagulación]]></kwd>
<kwd lng="es"><![CDATA[Endocarditis infecciosa]]></kwd>
<kwd lng="es"><![CDATA[Endocarditis fúngica]]></kwd>
<kwd lng="es"><![CDATA[Hemocultivos]]></kwd>
<kwd lng="es"><![CDATA[Tratamiento]]></kwd>
<kwd lng="en"><![CDATA[Anticoagulant therapy]]></kwd>
<kwd lng="en"><![CDATA[Infective endocarditis]]></kwd>
<kwd lng="en"><![CDATA[Fungal endocarditis]]></kwd>
<kwd lng="en"><![CDATA[Blood cultures]]></kwd>
<kwd lng="en"><![CDATA[Treatment]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p>&nbsp;</p> <table border="0" width="100%" height="174"> <tr> <td width="15%" valign="top" height="170"></td> <td width="85%" valign="top" height="170">     <p><font size=5><b>Controversias en endocarditis infecciosas</b></font></p>     <p>R. DE LA FUENTE CID, R. LÓPEZ RODRÍGUEZ, M. J. FERREIRO REGUEIRO, F.L. LADO LADO</p>     <p><i>Servicio de Medicina Interna. Departamento de Medicina. Hospital Cl&iacute;nico Universitario de Santiago.    <br> Santiago de Compostela, A Coru&ntilde;a</i></p>  </td> </tr> </table> <table border="0" width="100%"> <tr> <td width="48%" valign="top"></td> <td width="4%" valign="top"></td> <td width="48%" valign="top">     <p><i><font size="2">CONTROVERSIES IN INFECTIVE ENDOCARDITIS</font></i> </p>     <p>&nbsp; </p> </td> </tr> <tr> <td width="48%" valign="top">      <p>RESUMEN</p>     <p>La endocarditis infecciosa se define como la infecci&oacute;n de la superficie interna del coraz&oacute;n que afecta principalmente a las v&aacute;lvulas card&iacute;acas aunque tambi&eacute;n lo puede hacer a los septos, las cuerdas tendinosas o el endocardio mural. Se ha producido una gran controversia entorno a la etiolog&iacute;a, diagn&oacute;stico y tratamiento de la enfermedad. En este sentido, existen criterios b&aacute;sicos que definen a la endocarditis infecciosa; sin embargo aparecen situaciones particulares en las que resulta imprescindible un estudio minucioso, haciendo especial referencia a los agentes etiol&oacute;gicos y m&aacute;s concretamente a la endocarditis f&uacute;ngica.</p>     <p>PALABRAS CLAVE: Anticoagulaci&oacute;n. Endocarditis infecciosa. Endocarditis f&uacute;ngica. Hemocultivos. Tratamiento.</p>  </td> <td width="4%" valign="top"></td> <td width="48%" valign="top">      ]]></body>
<body><![CDATA[<p>ABSTRACT</p>     <p><i>The infective endocarditis is defined mainly as the infection of the internal surface of the heart, affecting to the cardiac valves although it can also do it to the septos, the tendinosas cords or endocardio mural. Around the origin, the diagnosis and the treatment of the disease, a considerable controversy has taken place. In this sense, basic criteria exist that they define to the infective endocarditis; however, particular situations are appraised in which the meticulous study is essential from the patient, doing special reference to the origin agents and, more in particular, to the fungal endocarditis.</i></p>     <p>KEY WORDS: <i>Anticoagulant therapy. Infective endocarditis. Fungal endocarditis. Blood cultures. Treatment.</i></p>  </td> </tr> </table>     <p><i>de la Fuente Cid R, L&oacute;pez Rodr&iacute;guez R, Ferreiro Regueiro MJ, Lado Lado FL. Controversias en endocarditis infecciosas. An Med Interna (Madrid) 2005; 22: 244-247.</i></p> <hr width="30%" align="left">     <p><font size="2">Trabajo aceptado: 10 de marzo de 2005</font></p>     <p><font size="2">Correspondencia: F. L. Lado Lado. Servicio de Medicina Interna. Hospital Clínico Universitario. 15706 Santiago de Compostela (A Coruña). e-mail: <a href="mailto:flladol@usc.es">flladol@usc.es</a></font></p> <hr>      <p>INTRODUCCI&Oacute;N</p>     <p>El objetivo de este articulo es comentar algunos aspectos de la etiolog&iacute;a, diagn&oacute;stico y tratamiento de la endocarditis infecciosa (EI), que puedan resultar controvertidos. Par&aacute;metros como el empleo de los criterios diagn&oacute;sticos, la forma correcta de efectuar el hemocultivo, cuando iniciar el tratamiento antibi&oacute;tico, la adecuada monitorizaci&oacute;n terap&eacute;utico-microbiol&oacute;gica, que actitud adoptar respecto a la anticoagulaci&oacute;n o el manejo de la endocarditis f&uacute;ngica, resultan controvertidos y a pesar de las gu&iacute;as de pr&aacute;ctica cl&iacute;nica y documentos de consenso, constituyen situaciones en las que es necesario un juicio individual meticuloso.</p>     <p>La EI se define como la infecci&oacute;n de la superficie interna del coraz&oacute;n afectando principalmente a las v&aacute;lvulas card&iacute;acas aunque tambi&eacute;n lo puede hacer a los septos, las cuerdas tendinosas o el endocardio mural. Durante mucho tiempo, los &uacute;nicos criterios reconocidos para el diagnostico de la EI fueron los de Beth Israel (1) que poseen una sensibilidad baja y no incluyen las alteraciones encontradas en el ecocardiograma. En 1994 Durack et al. proporcionaron a los cl&iacute;nicos, en funci&oacute;n de los hallazgos cl&iacute;nico-patol&oacute;gicos, microbiol&oacute;gicos y ecocardiogr&aacute;ficos, una nueva herramienta v&aacute;lida para el diagn&oacute;stico de la EI: los criterios de Duke (2). Seg&uacute;n los criterios que cumpla el paciente podemos descartar la endocarditis, definirla como posible o establecer el diagnostico definitivo. Han sido validados en numerosos estudios, demostrando una sensibilidad superior al 80% (3-5), una alta especificidad (5,6) y un elevado valor predictivo negativo (7). En el a&ntilde;o 2000 Li et al. (8) los revisaron para intentar solventar las principales criticas de los expertos: disminuir el sobrediagn&oacute;stico de posible EI, definir el riesgo relativo de endocarditis en la bacteriemia por <i> S. aureus</i>, establecer el papel del ecocardiograma transesof&aacute;gico y aumentar la sensibilidad en el diagnostico de la EI de la fiebre Q. Hay que tener siempre presente que los criterios modificados de Duke constituyen s&oacute;lo una ayuda valiosa para el diagn&oacute;stico de la EI y nunca deben primar sobre el juicio cl&iacute;nico del m&eacute;dico responsable del paciente.</p>     <p>Los <i> hemocultivos</i> constituyen un pilar fundamental para el diagnostico y tratamiento de la EI: forman parte de los criterios modificados de Duke, son el mejor m&eacute;todo para identificar el agente causal y permiten conocer la sensibilidad al tratamiento administrado. La endocarditis con cultivos negativos representa aproximadamente el 5% del total de las EI (9,10). En un paciente que se sospeche EI deben realizarse tres tomas de hemocultivos, con al menos una hora de diferencia entre el primero y el &uacute;ltimo; y como se trata de una enfermedad que produce bacteriemias constantes, no es preciso recogerlos coincidiendo con un pico febril.</p>     ]]></body>
<body><![CDATA[<p>En cada toma debe realizarse una siembra, de al menos 10 ml de sangre venosa, en un medio para aerobios y otro para anaerobios (11,12). Se debe comunicar al microbi&oacute;logo cual es la sospecha cl&iacute;nica, ya que debe incubarlos, si son negativos a las 72 horas, en medios especiales durante al menos 2 &oacute; 3 semanas para identificar bacterias de crecimiento lento (<i>Bartonella spp., Brucella spp., Legionella spp., Nocardia spp., Abiotrophia spp.</i> y microorganismos del grupo HACEK). En este instante debemos solicitar los estudios serol&oacute;gicos, que permiten identificar a microorganismos productores de EI con cultivo negativo: <i> C. burnetii, L. pneumophila, Chlamydia spp., Brucella spp., Bartonella spp.</i> (13,14).</p>     <p>La causa m&aacute;s frecuente de endocarditis con cultivo negativo es haber recibido, antes de la toma de los hemocultivos, tratamiento antibi&oacute;tico (9). Si el tratamiento se administr&oacute; s&oacute;lo durante dos o tres d&iacute;as, una vez que este se interrumpa, los hemocultivos se positivizan en pocos d&iacute;as. Sin embargo, si la terapia fue prolongada, estos pueden permanecer negativos durante semanas (10,12,14). En aquellos pacientes que recibieron tratamiento emp&iacute;rico y que se encuentran estables cl&iacute;nicamente, este debe suspenderse, al menos durante tres d&iacute;as, para realizar la toma de nuevos hemocultivos (12,14). La identificaci&oacute;n del agente etiol&oacute;gico juega un papel preponderante en el diagnostico y en las decisiones terap&eacute;uticas, por lo tanto, siempre que el paciente est&eacute; cl&iacute;nicamente estable, se debe esperar al resultado de los hemocultivos para iniciar tratamiento seg&uacute;n antibiograma. Sin embargo, cuando est&eacute; s&eacute;ptico, afecte a una v&aacute;lvula prot&eacute;sica, presente insuficiencia card&iacute;aca, insuficiencia valvular importante o progresiva, se retiraran hemocultivos y se iniciar&aacute; tratamiento emp&iacute;rico seg&uacute;n la etiolog&iacute;a m&aacute;s frecuente, el perfil cl&iacute;nico y los datos epidemiol&oacute;gicos (15).</p>     <p>Finalizado el tratamiento antibi&oacute;tico se realizar&aacute; <i> hemocultivo de control</i> para asegurar la curaci&oacute;n bacteriol&oacute;gica. Adem&aacute;s es recomendable repetirlo a los 2 meses, ya que es cuando existe mayor riesgo de recidiva (16).</p>     <p>En los &uacute;ltimos tiempos se ha producido un incremento importante de los microorganismos resistentes, por lo que se hace necesaria una <i> monitorizaci&oacute;n terap&eacute;utico-microbiol&oacute;gica</i>, que nos permita asegurar que estamos realizando un tratamiento eficaz. Para realizar un tratamiento adecuado en la EI debemos tener claros dos conceptos, en primer lugar que se deben utilizar antibi&oacute;ticos bactericidas por v&iacute;a intravenosa y en segundo lugar, que cuando se empleen combinaciones de antibi&oacute;ticos estos deben tener efecto sin&eacute;rgico.</p>     <p>La elecci&oacute;n del antibi&oacute;tico adecuado deber&iacute;a basarse en la determinaci&oacute;n de la concentraci&oacute;n m&iacute;nima inhibitoria (CMI) de los principales f&aacute;rmacos indicados para el agente etiol&oacute;gico (17,18). La CMI determina cual es la concentraci&oacute;n m&iacute;nima suficiente para impedir el desarrollo de la bacteria en los medios de cultivo, en condiciones est&aacute;ndar, tras la administraci&oacute;n de una dosis previamente establecida del f&aacute;rmaco (19). Un antibi&oacute;tico se considera bactericida cuando su concentraci&oacute;n m&iacute;nima bactericida (CMB), es igual o ligeramente superior (una o dos diluciones) que la CMI (17).</p>     <p>Una vez escogido el antibi&oacute;tico, la determinaci&oacute;n de la <i> actividad bactericida del suero</i> (ABS) nos permite conocer, si la dosis que estamos empleando es la correcta o necesitamos aumentarla para lograr el efecto deseado. En la <a href="#t1">Tabla I</a> se exponen las circunstancias en las que estar&iacute;a indicada su determinaci&oacute;n. Una ABS en el "pico" y en el "valle" igual o superior a 1:32 y 1:8 respectivamente, se asocia con una curaci&oacute;n bacteriol&oacute;gica en m&aacute;s del 90% de los casos, pero como cualquier test de laboratorio, no puede predecir el curso de acontecimientos que son dependientes de multitud de factores (16).</p>     <p align="center"><a name="t1"><img src="/img/revistas/ami/v22n5/revision_tabla1.jpg" width="336" height="229"></a></p>    <br>      <p>Cuando sea preciso utilizar una combinaci&oacute;n de f&aacute;rmacos, estos deben tener efecto sin&eacute;rgico. En el momento actual disponemos de varias combinaciones adecuadas para los g&eacute;rmenes m&aacute;s frecuentes. El <i>S. viridans</i> con resistencia intermedia a la penicilina (CMI <font size="2">&ge;</font> 0,1 µg/mL a <font size="2"> &le;</font> 0,5 µg/mL), se debe tratar con penicilina G o ampicilina m&aacute;s gentamicina durante las dos primeras semanas y en el resistente a la penicilina (CMI <font size="2">&gt;</font> 0,5 µg/mL) se debe utilizar esta combinaci&oacute;n durante al menos cuatro semanas (20); mientras que en las cepas sensibles a la penicilina la administraci&oacute;n de una dosis diaria de ceftriaxona asociada a una dosis diaria de gentamicina, 3 mg/kg, permite reducir la duraci&oacute;n del tratamiento de 4 a 2 semanas (21). Se recomienda que la endocarditis por <i>S. aureus</i> se trate con penicilinas resistentes a la penicilinasa en combinaci&oacute;n, los primeros 3-5 d&iacute;as, con aminogluc&oacute;sidos (18,20); sin embargo, en los ensayos cl&iacute;nicos realizados en humanos no demostr&oacute; un mayor beneficio la asociaci&oacute;n respecto a la monoterapia (22,23). Debemos tener presente que frente al <i>S. aureus</i> son menos efectivos los reg&iacute;menes que emplean glucop&eacute;ptidos (24,25), por lo que su uso debe limitarse a los <i>S. aureus</i> meticilinresistentes y a los pacientes al&eacute;rgicos a la penicilina. Por el contrario, en el tratamiento de los estafilococos coagulasa negativos son m&aacute;s efectivos los glucop&eacute;ptidos que los betalact&aacute;micos, incluidos los carbapenemes, y son m&aacute;s efectivos los tratamientos que asocian vancomicina, aminogluc&oacute;sidos y rifampicina (18,26,27). Para el tratamiento del <i>Enterocococcus spp.</i> se recomienda la administraci&oacute;n de penicilina G o ampicilina asociado a aminogluc&oacute;sidos durante 4 a 6 semanas (18,20); no obstante, en los pacientes con alto riesgo de toxicidad por los aminogluc&oacute;sidos, es igualmente eficaz administrar estos s&oacute;lo durante dos semanas (28). Por otra parte, la combinaci&oacute;n de ampicilina y ceftriaxona parece ser una alternativa segura y efectiva para el tratamiento de la endocarditis enteroc&oacute;cica (29).</p>     <p>La endocarditis f&uacute;ngica (EF) representa menos del 10% del total de las endocarditis (30). En los pacientes con transplante de &oacute;rganos s&oacute;lidos es la segunda causa m&aacute;s frecuente de endocarditis, despu&eacute;s de la endocarditis estafiloc&oacute;cica (31). Se trata de una entidad con una elevada mortalidad pero hay que tener presente que, su diagnostico, que requiere de un elevado nivel de sospecha cl&iacute;nica, y tratamiento precoz se asocia a un incremento de la supervivencia.</p>     ]]></body>
<body><![CDATA[<p>Su diagn&oacute;stico de sospecha no es f&aacute;cil ya que, comparada con otras endocarditis subagudas, presenta una baja incidencia de insuficiencia card&iacute;aca, cambios en los soplos card&iacute;acos y esplenomegalia; mientras que, por el contrario, son muy frecuentes los fen&oacute;menos emb&oacute;licos y la cl&iacute;nica neurol&oacute;gica, focal o global (30). En los transplantados de &oacute;rgano s&oacute;lido debemos tener presente que la EF presenta una distribuci&oacute;n bimodal, con un primer pico de incidencia en los 30 primeros d&iacute;as del trasplante, afectando sobre todo el endocardio mural, y un segundo pico, menos frecuente, a los dos a&ntilde;os del mismo.</p>     <p>La etiolog&iacute;a m&aacute;s habitual en la poblaci&oacute;n general es la <i>Candida spp</i>, mientras que en los trasplantados es el <i>Aspergillus spp</i> (30-32). Algunas especies de hongos, como el <i>Aspergillus spp.</i>, casi nunca se a&iacute;slan en los hemocultivos, mientras que otras especies se a&iacute;slan espor&aacute;dicamente (14). El aislamiento de <i>Candida spp</i> y <i> Cryptococcus neoformans</i> aumenta con el empleo de t&eacute;cnicas de lisis centrifugaci&oacute;n o el medio de Casta&ntilde;eda (30,33). En el ecocardiograma se observan vegetaciones de gran tama&ntilde;o y muy friables, bastante caracter&iacute;stica de su etiolog&iacute;a, present&aacute;ndose una disminuci&oacute;n de la mortalidad desde el momento que se asociaron a la EF (30,34). La Candida spp presenta mayor tendencia a formar vegetaciones grandes que el <i>Aspergillus spp.</i>, as&iacute; el ecocardiograma transtor&aacute;cico puede pasar por alto algunos casos de endocarditis por este hongo, que se observan en el ecocardiograma transesof&aacute;gico (32).</p>     <p>Se han identificados varios factores de riesgo para el desarrollo de EF: UDVP, tratamiento con inmunosupresores, neutropenia, neoplasias y nutrici&oacute;n parenteral (30). La EF del segundo a&ntilde;o postrasplante, se ha relacionado con el incremento de la dosis de inmunosupresores y la infecci&oacute;n reciente por citomegalovirus (32).</p>     <p>En aquellos pacientes que presentan enfermedad valvular, diagnostico de sospecha de endocarditis bacteriana subaguda, signos neurol&oacute;gicos inexplicados, &eacute;mbolos perif&eacute;ricos, hemocultivos negativos y antecedentes de fungemia reciente no tratada; debemos ser utilizar todos los medios de los que disponemos para intentar diagnosticar una EF: ecocardiograma transtor&aacute;cico o transesof&aacute;gico, hemocultivos en medios especiales para hongos, cultivos de &eacute;mbolos s&eacute;pticos y pruebas serol&oacute;gicas (inmunoglobulina anti-Candida, ant&iacute;geno galactomanano) (30).</p>    <p> Las EF tratadas con antif&uacute;ngicos y cirug&iacute;a presentan mayor supervivencia que las que reciben s&oacute;lo tratamiento m&eacute;dico (30). La combinaci&oacute;n de tratamiento antif&uacute;ngico, antes, durante y despu&eacute;s de la cirug&iacute;a, con el desbridamiento y reemplazo valvular precoz con material biol&oacute;gico, en los primeros 5 d&iacute;as de tratamiento, se asocia a un mejor pron&oacute;stico que el manejo s&oacute;lo con tratamiento m&eacute;dico (30,34-37). La anfotericina B liposomial es el f&aacute;rmaco de elecci&oacute;n, ya que garantiza una terapia prolongada con menores efectos secundarios (30,35,37). Recientemente se ha demostrado la superioridad del voriconazol sobre la anfotericina B en el tratamiento de la aspergilosis invasiva (38), por lo que el voriconazol podr&iacute;a ser considerado el f&aacute;rmaco de elecci&oacute;n en el tratamiento de la endocarditis por <i>Aspergillus</i>.</p>     <p>No existe ning&uacute;n estudio que avale el empleo de la anticoagulaci&oacute;n en la EI para prevenir los embolismos s&eacute;pticos. A&uacute;n es m&aacute;s, est&aacute; contraindicada en el tratamiento de la EI sobre v&aacute;lvula nativa, ya que aumenta el riesgo de hemorragia cerebral (39-41). En endocarditis sobre v&aacute;lvula nativa, s&oacute;lo se anticoagular&aacute; s&iacute; existe una indicaci&oacute;n para ello, pero independiente de la endocarditis.</p>     <p>En la EI sobre v&aacute;lvula prot&eacute;sica se puede mantener la anticoagulaci&oacute;n, aunque es preferible realizarla con heparina mientras el paciente est&eacute; inestable, al menos la primera semana de tratamiento antibi&oacute;tico, ya que el riesgo de embolismo decrece despu&eacute;s de forma importante (40,42). En el caso de que se produzca un embolismo cerebral con hemorragia o se diagnostique un aneurisma mic&oacute;tico, est&aacute; indicado suspenderla hasta que la complicaci&oacute;n se haya resuelto (40,43). Si se produce un infarto cerebral isqu&eacute;mico extenso se debe de retirar la anticoagulaci&oacute;n, mientras que si es peque&ntilde;o se puede mantener con heparina y repetir TC en 2-3 d&iacute;as, suspendi&eacute;ndose durante 48-72 horas en el caso de que aumentar&aacute; su tama&ntilde;o. La suspensi&oacute;n del tratamiento anticoagulante durante una o dos semanas se acompa&ntilde;a de una baja probabilidad de embolias en pacientes con v&aacute;lvula card&iacute;aca prot&eacute;sica (42, 44).</p>     <p>Como conclusi&oacute;n, consideramos que los criterios diagn&oacute;sticos constituyen una ayuda valiosa para el diagn&oacute;stico de la EI pero nunca deben primar sobre el juicio cl&iacute;nico, ya que no contemplan todas las variables posibles y a&uacute;n hoy en d&iacute;a son susceptibles de ser mejorados. En el manejo adecuado de la EI juega un papel fundamental el aislamiento de agente etiol&oacute;gico, por lo que debemos ser especialmente cuidadosos en la toma de los hemocultivos y no iniciar el tratamiento antibi&oacute;tico, siempre que el estado del paciente nos lo permita, hasta realizar su aislamiento. Por otro lado consideramos que el mejor tratamiento para la EF consiste en la combinaci&oacute;n de los antif&uacute;ngicos con el reemplazo valvular y que en la actualidad nunca se deber&iacute;a iniciar la anticoagulaci&oacute;n en las EI para prevenir los &eacute;mbolos s&eacute;pticos.</p>      <p>&nbsp;</p>     <p><i><font size="4">Bibliograf&iacute;a</font></i></p>     ]]></body>
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Gonz&aacute;lez de Molina M, Fern&aacute;ndez Guerrero JC, Azpitarte J. Endocarditis infecciosa: Grado de discordancia entre lo recomendado por las gu&iacute;as cl&iacute;nicas y lo realizado en la pr&aacute;ctica. Rev Esp Cardiol 2002; 55: 793-800.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=573227&pid=S0212-7199200500050001100015&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>    <!-- ref --><p>16. Seto TB, Kwiat D, Taira DA, et al. Physicians&acute;recommendations to patients for use of antibiotic prophylaxis to prevent endocarditis. JAMA 2000; 284: 68-71.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=573229&pid=S0212-7199200500050001100016&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>    <!-- ref --><p>17. Pascual A, Perea JP. El control de laboratorio en el diagn&oacute;stico y tratamiento de la endocarditis infecciosa. Rev Esp Cardiol 1998; 51: 22-28.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=573231&pid=S0212-7199200500050001100017&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>    <!-- ref --><p>18. Moreillon P, Que Y-A. Infective endocarditis. 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Antibiotic treatment of adults with infective endocarditis due to streptococci, enterococci, staphylococci, and HACEK microorganisms. American Heart Association. JAMA 1995; 274: 1706-13.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=573237&pid=S0212-7199200500050001100020&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>    <!-- ref --><p>21. Sexton DJ, Tenenbaum MJ, Wilson WR, et al. Ceftriaxone once daily for four weeks compared with ceftriaxone plus gentamicin once daily for two weeks for treatment of endocarditis due penicillin-susceptible streptococci. Endocarditis Treatment Consortium Group. 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