<?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>S1688-04202018000100001</article-id>
<article-id pub-id-type="doi">10.29277/cardio.33.1.7</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Implicancia pronóstica de los estudios gated-SPECT normales en pacientes mayores de 70 años]]></article-title>
<article-title xml:lang="en"><![CDATA[Pronostic implication of normal gated SPECT studies in patients over 70 years old]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Caramés]]></surname>
<given-names><![CDATA[Silvia Noemi]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Molteni]]></surname>
<given-names><![CDATA[Susana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Marelich]]></surname>
<given-names><![CDATA[Liliana Silvia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martire]]></surname>
<given-names><![CDATA[Víctor]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Clínica Privada Monte Grande Servicio de Medicina Nuclear ]]></institution>
<addr-line><![CDATA[Buenos Aires ]]></addr-line>
<country>Argentina</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2018</year>
</pub-date>
<volume>33</volume>
<numero>1</numero>
<fpage>1</fpage>
<lpage>19</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_arttext&amp;pid=S1688-04202018000100001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_abstract&amp;pid=S1688-04202018000100001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_pdf&amp;pid=S1688-04202018000100001&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Introducción: un resultado normal en la centellografía de perfusión miocárdica gatillada (gated-SPECT) tiene un alto valor predictivo negativo para enfermedad coronaria grave; existe un período de tiempo variable en que los pacientes permanecen con una tasa de eventos baja (menor a 1%). Sin embargo, algunas evidencias sugieren que este período de garantía (PG) no es el mismo en todos los grupos etarios.  Objetivo:  establecer el período de tiempo en el cual los pacientes ancianos (mayores de 70 años) mantienen una tasa de eventos cardíacos por debajo de 1%.  Material y método:  se estudiaron 554 pacientes mediante gated-SPECT, divididos en dos grupos: Grupo 1: (n=354) con gated-SPECT normal, y Grupo 2: (n=200) con gated-SPECT anormal. Definimos un gated-SPECT normal como aquel con score de suma en estrés (SSS) &lt; 4 y parámetros funcionales normales. El seguimiento medio fue de 30,6 meses (rango: 12-62 meses) para la pesquisa de los eventos cardiovasculares (EC): muerte cardíaca (MC) e infarto agudo de miocardio no fatal (IAMNF), y eventos combinados (ECB): EC+ angioplastia coronaria, cirugía de revascularización miocárdica e implante de cardiodesfibrilador. Se utilizó prueba no paramétrica de Pearson y se calculó el estadístico x2, con un valor de p ?0,05 para el rechazo de la hipótesis nula (IC: 95%).  Resultados:  la comparación entre ambos grupos muestra diferencias en los tres primeros años para la aparición de EC (p &lt;0,0001), MC (p &lt;0,0001) y ECB (p &lt;0,0001). La tasa de EC en el Grupo 1 para cada año fue de 0,56%, 0,59% y 0,50%, respectivamente, con una tasa acumulada a tres años de 1,65%. La tasa en el Grupo 2 fue de 2,50%, 1,58% y 3,84%, respectivamente (tasa acumulada: 7,92%). El período de tiempo en el cual los pacientes del Grupo 1 mantuvieron un riesgo de EC por debajo de 1% fue de 18 meses.  Conclusión:  el pronóstico de los pacientes ancianos que presentan un resultado normal en el gated-SPECT es muy bueno, con una tasa de EC menor a 1% por un lapso de 18 meses.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Summary:  Introduction:  a normal result in myocardial perfusion scintigraphy (gated-SPECT) has a high negative predictive value for severe coronary artery disease; there is a period of time in which patients remain with a low event rate (less than 1%). However, some evidence suggests that this guarantee period (PG) is not the same in all age groups.  Objectives:  to establish the period of time in which elderly patients (older than 70 years) maintain a rate of cardiac events below 1%.  Material and methods:  554 patients were studied through gated-SPECT, divided into two groups: Group 1: (n = 354) with normal gated-SPECT, and Group 2: (n = 200) with abnormal gated-SPECT. We define a normal gated-SPECT as that with a stress sum score (SSS) &lt;4 and normal functional parameters. The mean follow-up was 30.6 months (range: 12-62 months), for the investigation of cardiovascular events (CE): cardiac death (CD) and nonfatal infarction (NFAMI), and combined events (CBE): CE + coronary angioplasty, myocardial revascularization surgery and implanted cardiodefibrillator (ICD). Pearson&#8217;s nonparametric test was used and the &#935;2 statistic was calculated, with a value of p &lt;0.05 for the rejection of the null hypothesis (CI: 95%).  Results:  the comparison between both groups shows differences for the appearance of CE: (p &lt;0.0001), CD: (p &lt;0.0001) and CBE: (p &lt;0.0001). The CE rate in Group 1 for each year was 0.56, 0.59 and 0.50%, respectively, with a cumulative 3-year rate of 1.65%. The rate in Group 2 was 2.5, 1.58 and 3.84%, respectively (cumulative rate: 7.92%). The period in which Group 1 patients maintained a risk of CD below 1% was 18 months.  Conclusion:  the prognosis of elderly patients presenting a normal gated-SPECT result is very good, with a cardiac event rate of less than 1% for a period of 18 months.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Tomografía computarizada por emisión de fotón único sincronizada cardíaca]]></kwd>
<kwd lng="es"><![CDATA[Pronóstico]]></kwd>
<kwd lng="es"><![CDATA[Anciano]]></kwd>
<kwd lng="en"><![CDATA[Cardiac gated single photon emission computer assisted tomography]]></kwd>
<kwd lng="en"><![CDATA[Prognosis]]></kwd>
<kwd lng="en"><![CDATA[Aged]]></kwd>
</kwd-group>
</article-meta>
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