<?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>1688-0420</journal-id>
<journal-title><![CDATA[Revista Uruguaya de Cardiología]]></journal-title>
<abbrev-journal-title><![CDATA[Rev.Urug.Cardiol.]]></abbrev-journal-title>
<issn>1688-0420</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Uruguaya de Cardiología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1688-04202021000301203</article-id>
<article-id pub-id-type="doi">10.29277/cardio.36.3.5</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Degeneración valvular en pacientes con bioprótesis aórtica porcina evaluada mediante PET con 18Ffluoruro de sodio]]></article-title>
<article-title xml:lang="en"><![CDATA[Valve degeneration in patients with aortic porcine bioprosthesis evaluated through 18Fsodium fluoride PET]]></article-title>
<article-title xml:lang="pt"><![CDATA[Degeneração valvular em pacientes com bioprótese aórtica suína avaliada mediante PET com fluoreto18F]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fernández]]></surname>
<given-names><![CDATA[Amparo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Loza]]></surname>
<given-names><![CDATA[Gimena]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Parma]]></surname>
<given-names><![CDATA[Gabriel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Florio]]></surname>
<given-names><![CDATA[Lucía]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alonso]]></surname>
<given-names><![CDATA[Omar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Niell]]></surname>
<given-names><![CDATA[Nicolás]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ezquerra]]></surname>
<given-names><![CDATA[Víctor]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Robaina]]></surname>
<given-names><![CDATA[Ricardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Dayan]]></surname>
<given-names><![CDATA[Víctor]]></given-names>
</name>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Nacional de Cirugía Cardíaca  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="Af2">
<institution><![CDATA[,Hospital de Clínicas Centro Cardiovascular Universitario ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="Af3">
<institution><![CDATA[,Centro Uruguayo de Imagenología Molecular (CUDIM).  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="Af4">
<institution><![CDATA[,Hospital de Clínicas. Departamento Clínico de Imagenología ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Uruguay</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<volume>36</volume>
<numero>3</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_arttext&amp;pid=S1688-04202021000301203&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_abstract&amp;pid=S1688-04202021000301203&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_pdf&amp;pid=S1688-04202021000301203&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Introducción:  la degeneración valvular protésica es un problema clínico; los métodos de imagen convencionales permiten diagnosticarla en las últimas etapas. La tomografía por emisión de positrones (PET) con 18Ffluoruro puede detectar de manera precoz la degeneración subclínica.  Objetivo:  correlacionar parámetros de deterioro estructural protésico por PET con parámetros hemodinámicos ecocardiográficos al año de la sustitución valvular aórtica (SVA) por bioprótesis porcina.  Métodos:  estudio prospectivo ad hoc de un ensayo clínico. Se reclutaron pacientes sometidos a SVA por bioprótesis porcina en dos centros nacionales entre el 01/01/2019 y el 13/02/2020. Se realizaron controles clínicos y ecocardiográficos. Se seleccionaron aleatoriamente 19 sujetos a los que se les realizó PET 18Ffluoruro de sodio con angiotomografía al año de la SVA. Se midió la captación del trazador en la válvula (SUVavV) y aurícula derecha (SUVavA), calculando el índice SUVavV/SUVavA, que se comparó con los gradientes ecocardiográficos medio y máximo al año, mediante análisis de correlación de Spearman.  Resultados:  de 140 sujetos sometidos a SVA se realizó PET a 19, a los 16,3 meses (15,9-16,9) luego de la SVA. La mediana del índice SUVavV/SUVavA fue de 1,17 (1,11-1,27). Se encontró una correlación negativa moderada entre la captación de 18Ffluoruro y el gradiente medio (coeficiente de correlación -0,516, p = 0,028) y máximo (coeficiente -0,589, p = 0,010) al año.  Conclusiones:  en el seguimiento de los pacientes en los que se le realizó una sustitución valvular aórtica con bioprótesis, encontramos valores bajos de captación en el PET y gradientes ecocardiográficos normales con una correlación negativa moderada entre estos hallazgos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Summary:  Introduction:  prosthetic valve degeneration is a relevant clinical disorder; conventional imaging methods allow diagnosis in the later stages. 18Ffluoride positron emission tomography (PET) can detect subclinical degeneration earlier.  Objective:  correlate parameters of prosthetic structural deterioration by PET with echocardiographic hemodynamic parameters one year after aortic valve replacement (AVR) by porcine bioprosthesis.  Methods:  prospective ad hoc study of a clinical trial. Patients undergoing AVR by porcine bioprosthesis were recruited in two national centers between 01/01/2019 and 02/13/2020. Clinical and echocardiographic controls were carried out. 19 subjects were randomly selected and underwent 18Fsodium fluoride PET with CT angiography one year after AVR. Tracer uptake in the valve (SUVavV) and right atrium (SUVavA) was measured, creating the SUVavV/SUVavA index, which was compared with the mean and maximum gradients at one year, using Spearman&#8217;s correlation analysis.  Results:  of a total of 140 subjects, PET was performed on 19 at 16.3 months (15.9-16.9) after the AVR. The median SUVavV/SUVavA ratio was 1.17 (1.11-1.27). A moderate negative correlation was found between. 18Ffluoride uptake and the mean gradient (correlation coefficient -0.516, p = 0.028) and maximum (coefficient of -0.589, p = 0.010) at one year.  Conclusions:  we found low uptake values in PET, echocardiographic gradients in normal range and no positive correlation between both parameters. It is the first national report with these imaging techniques.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo:  Introdução:  a degeneração da válvula protética é um problema clínico; os métodos convencionais de imagem permitem o diagnóstico nas fases posteriores. A tomografia por emissão de pósitrons (PET) com fluoreto18F pode detectar a degeneração subclínica precocemente.  Objetivo:  correlacionar parâmetros de deterioração estrutural protética por PET com parâmetros hemodinâmicos ecocardiográficos após um ano da troca valvar aórtica (SVA) por bioprótese suína.  Métodos:  estudo ad hoc prospectivo de um ensaio clínico. Pacientes submetidos a SVA por bioprótese suína foram recrutados em dois centros nacionais entre 01/01/2019 e 13/02/2020. Foram realizados controles clínicos e ecocardiográficos. 19 indivíduos foram selecionados aleatoriamente que foram submetidos a PET com fluoreto de sódio 18F com angiotomografia um ano após AVS. A captação do traçador na válvula (SUVavV) e átrio direito (SUVavA) foi medida, criando o índice SUVavV/SUVavA, que foi comparado com os gradientes médio e máximo em um ano, usando a análise de correlação de Spearman.  Resultados:  de um total de 140 indivíduos submetidos a SVA, PET foi realizado em 19, em 16,3 meses (15,9-16,9) após a SVA. A proporção média de SUVavV/SUVavA foi de 1,17 (1,11-1,27). Uma correlação negativa moderada foi encontrada entre a captação de fluoreto18F e o gradiente médio (coeficiente de correlação -0,516, p = 0,028) e máximo (coeficiente de -0,589, p = 0,010) em um ano.  Conclusões:  encontramos valores baixos de captação na PET, gradientes ecocardiográficos dentro da normalidade, sem correlação positiva entre os dois parâmetros. É o primeiro trabalho nacional com essas técnicas de imagem.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Sustitución valvular aórtica]]></kwd>
<kwd lng="es"><![CDATA[Bioprótesis porcina]]></kwd>
<kwd lng="es"><![CDATA[Deterioro estructural protésico]]></kwd>
<kwd lng="es"><![CDATA[Tomografía por emisión de positrones]]></kwd>
<kwd lng="es"><![CDATA[Ecocardiograma]]></kwd>
<kwd lng="en"><![CDATA[Aortic valve replacement]]></kwd>
<kwd lng="en"><![CDATA[Porcine bioprosthesis]]></kwd>
<kwd lng="en"><![CDATA[Structural prosthetic deterioration]]></kwd>
<kwd lng="en"><![CDATA[Positron emission tomography]]></kwd>
<kwd lng="en"><![CDATA[Echocardiogram]]></kwd>
<kwd lng="pt"><![CDATA[Substituição valvar aórtica]]></kwd>
<kwd lng="pt"><![CDATA[Bioprótese suína]]></kwd>
<kwd lng="pt"><![CDATA[Deterioração protética estrutural]]></kwd>
<kwd lng="pt"><![CDATA[Tomografia por emissão de pósitrons]]></kwd>
<kwd lng="pt"><![CDATA[Ecocardiograma]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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