<?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>1726-8958</journal-id>
<journal-title><![CDATA[Revista Médica La Paz]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Méd. La Paz]]></abbrev-journal-title>
<issn>1726-8958</issn>
<publisher>
<publisher-name><![CDATA[Colegio Médico de La Paz]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1726-89582024000200015</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[ERITROCITOSIS EN ADULTOS MAYORES A GRAN ALTITUD CARACTERIZADAS POR INCREMENTO DE ERITROPOYETINA Y TROMBOSIS]]></article-title>
<article-title xml:lang="en"><![CDATA[ERYTHROCYTOSIS IN OLDER ADULTS HIGH ALTITUDE DWELLERS CHARACTERIZED BY INCREASED ERYTHROPOIETIN AND THROMBOSIS]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Amaru]]></surname>
<given-names><![CDATA[Ricardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Velarde]]></surname>
<given-names><![CDATA[Jeaneth]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
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<contrib contrib-type="author">
<name>
<surname><![CDATA[Mamani]]></surname>
<given-names><![CDATA[Reyna]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Luna]]></surname>
<given-names><![CDATA[Julieta]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Paton]]></surname>
<given-names><![CDATA[Daniela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carrasco]]></surname>
<given-names><![CDATA[Mireya]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,UMSA Facultad de Medicina Unidad de Biología Celular]]></institution>
<addr-line><![CDATA[La Paz ]]></addr-line>
<country>Bolivia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Boliviano de Oncohematología &#8220;Paolo Belli&#8221;  ]]></institution>
<addr-line><![CDATA[La Paz ]]></addr-line>
<country>Bolivia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<volume>30</volume>
<numero>2</numero>
<fpage>15</fpage>
<lpage>20</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_arttext&amp;pid=S1726-89582024000200015&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_abstract&amp;pid=S1726-89582024000200015&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_pdf&amp;pid=S1726-89582024000200015&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Introducción. En la edad adulta mayor o tardía (&gt;60 años), la prevalencia de enfermedades crónicas no transmisibles incrementa, entre ellas afecciones como las eritrocitosis. Además de comprender los cambios fisiológicos propios de la edad tardía, es de interés discernir sobre las particularidades de las eritrocitosis en adultos mayores.  Objetivo.  Describir las características clínicas y laboratoriales de las eritrocitosis en pacientes adultos mayores con radicatoria en gran altitud.  Material y método. Estudio analítico transversal retrospectivo que consideró 631 pacientes con eritrocitosis patológicas, distribuidos en 3 grupos: &lt;30 años (n= 16), 30-60 años (n= 388) y &gt;60 años (n= 227); todos pacientes con radicatoria en gran altitud (3600 - 4000 m s. n. m.) y atendidos en consulta externa entre gestiones 2015 a abril de 2024. Se analizó los datos referidos a presencia de síntomas de hiperviscosidad sanguínea y resultados laboratoriales entre los distintos grupos.  Resultados. La edad media de los pacientes adultos mayores con eritrocitosis fue de 68 años. Las características clínicas estuvieron representadas por incremento de comorbilidades, saturación de oxígeno disminuida (81%) e incremento de trombosis (12%), principalmente TVP y AVC, con mayor frecuencia en varones (12.7%). Laboratorialmente, se observó concentraciones de Epo incrementadas (73 mUI/ml). No hubo diferencias significativas en los datos de hemograma entre los grupos estudiados.  Conclusiones. Las eritrocitosis en adultos mayores residentes a gran altitud tienen características propias (trombosis y Epo incrementada) que posibilitan un diagnóstico urgente y tratamiento preventivo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Introduction. In older adults (&gt;60years), the prevalence of chronic non-communicable diseases is increased, which includes conditions such as erythrocytosis. Besides understanding the common physiological changes of late adulthood, it is of interest to discern about the features regarding erythrocytosis in older adults.  Objective. To describe the clinical and laboratory characteristics of erythrocytosis in older adults residing at high altitude.  Material and method. Retrospective cross-sectional study that considered 631 patients with pathological erythrocytosis, distributed in 3 groups: &lt;30 years (n= 16), 30-60 years (n= 388) and &gt;60 years (n= 227); all individuals residing at high-altitude (3600-4000 m a.s.l), and treated between 2015 to April 2024 on an outpatient basis. Data concerning the presence of blood hyperviscosity symptoms as well as laboratory results were analyzed among the studied groups.  Results. The mean age of older adult patients with erythrocytosis was 68 years. Clinical characteristics were characterized by increased comorbidities, decreased oxygen saturation (81%), and increased thrombosis (12%), mainly DVT and stroke, more frequently in men (12.7%). Laboratory data showed increased Epo concentrations (73 mIU/ml). No signrficant differences regarding CBC data among groups were observed.  Conclusions. Erythrocytosis in older adults living at high altitude display specific characteristics (increased Epo and thrombosis) that allow to perform urgent diagnosis and preventive treatment.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[eritrocitosis]]></kwd>
<kwd lng="es"><![CDATA[adulto mayor]]></kwd>
<kwd lng="es"><![CDATA[gran altitud]]></kwd>
<kwd lng="es"><![CDATA[eritropoyetina]]></kwd>
<kwd lng="es"><![CDATA[trombosis]]></kwd>
<kwd lng="en"><![CDATA[erythrocytosis]]></kwd>
<kwd lng="en"><![CDATA[older adult]]></kwd>
<kwd lng="en"><![CDATA[high altitude]]></kwd>
<kwd lng="en"><![CDATA[erythropoietin]]></kwd>
<kwd lng="en"><![CDATA[thrombosis]]></kwd>
</kwd-group>
</article-meta>
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