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        "resumen" => "<span class="elsevierStyleSectionTitle">Objective</span><p class="elsevierStyleSimplePara elsevierViewall">In this study&#44; we assessed factors associated with cardiovascular risk in patients with sleep apnea-hypopnea syndrome &#40;SAHS&#41; through analysis of plasma concentrations of N-terminal prohormone brain natriuretic peptide &#40;NTproBNP&#41; and high-sensitivity C-reactive protein &#40;hsCRP&#41;&#46; In addition&#44; we analyzed the effect of nasal continuous positive airway pressure &#40;nCPAP&#41; on these markers&#46;</p> <span class="elsevierStyleSectionTitle">Patients and Methods</span><p class="elsevierStyleSimplePara elsevierViewall">Forty-two patients with SAHS &#40;mild to moderate in 15 cases and severe in 27&#41; were compared with 14 individuals without SAHS&#46; The participants were not receiving drug treatment and they did not have diabetes&#44; hypertension&#44; marked dyslipidemia&#44; or cardiovascular disease&#44; which was ruled out both clinically and by echocardiography and <span class="elsevierStyleSup">99m</span>Tc-tetrofosmin scintigraphy at rest and during exercise&#46; The effects of nCPAP in patients with severe SAHS were analyzed after 6 months of treatment&#46;</p> <span class="elsevierStyleSectionTitle">Results</span><p class="elsevierStyleSimplePara elsevierViewall">Following adjustment for age&#44; body mass index&#44; and smoking habit&#44; the mean concentrations of markers were not significantly higher in patients with severe SAHS than in those with mild-to-moderate SAHS or in control subjects&#46; Nevertheless&#44; in patients with SAHS the main factor influencing NTproBNP concentrations was the percentage of time with a nocturnal arterial oxygen saturation of less then 90&#37; &#40;<span class="elsevierStyleItalic">r</span>&#61;0&#46;37&#44;<span class="elsevierStyleItalic">P</span>&#61;&#46;017&#41;&#46; No variables predictive of hsCRP concentration were identified&#46; The concentrations of the markers were reduced by nCPAP&#44; but the differences were not statistically significant&#46;</p> <span class="elsevierStyleSectionTitle">Conclusions</span><p class="elsevierStyleSimplePara elsevierViewall">While nocturnal hypoxemia in SAHS is responsible for variations in the plasma concentration of NTproBNP &#40;as a result of cardiovascular changes&#41;&#44; SAHS appears not to be associated with the inflammatory marker hsCRP when patients with heart disease&#44; cardiovascular risk factors&#44; or those receiving pharmacologic treatment are excluded&#46;</p>"
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        "resumen" => "<span class="elsevierStyleSectionTitle">Objetivo</span><p class="elsevierStyleSimplePara elsevierViewall">Investigamos los factores del s&#237;ndrome de apneas-hipopneas durante el sue&#241;o &#40;SAHS&#41; que activan los mecanismos de riesgo cardiovascular&#44; a trav&#233;s del estudio de las concentraciones plasm&#225;ticas del fragmento N-terminal del precursor del p&#233;ptido natriur&#233;tico cerebral &#40;NTproBNP&#41; y de la prote&#237;na C reactiva de alta sensibilidad &#40;PCRas&#41;&#44; as&#237; como el efecto que sobre ellos tiene el tratamiento con presi&#243;n positiva continua de la v&#237;a a&#233;rea nasal &#40;CPAPn&#41;&#46;</p> <span class="elsevierStyleSectionTitle">Pacientes Y M&#233;todos</span><p class="elsevierStyleSimplePara elsevierViewall">Se estudi&#243; a 42 pacientes con SAHS &#40;leve-moderado en 15 casos y grave en 27&#41;&#44; comparados con 14 personas sin SAHS&#46; No tomaban f&#225;rmacos ni presentaban diabetes&#44; hipertensi&#243;n&#44; dislipemia importante o enfermedad cardiovascular&#44; que se descart&#243; tanto cl&#237;nicamente como por ecocardiograf&#237;a y tomograf&#237;a computarizada por emisi&#243;n de fot&#243;n c&#237;nico-esfuerzo con<span class="elsevierStyleSup">99m</span>Tc-tetrofosmina&#46; En los pacientes con SAHS grave se estudiaron los efectos de 6 meses con CPAPn&#46;</p> <span class="elsevierStyleSectionTitle">Resultados</span><p class="elsevierStyleSimplePara elsevierViewall">Ajustando por edad&#44; &#237;ndice de masa corporal y tabaquismo&#44; las medias de los biomarcadores no fueron significativamente m&#225;s altas en los pacientes con SAHS grave que en aqu&#233;llos con SAHS leve-moderado o en los controles&#46; Sin embargo&#44; en los pacientes con SAHS el principal factor que influy&#243; en las concentraciones de NTproBNP fue el porcentaje de tiempo con saturaci&#243;n arterial de ox&#237;geno nocturna menor del 90&#37; &#40;r &#61; 0&#44;37&#59; p &#61; 0&#44;017&#41;&#44; sin que se encontrara ning&#250;n predictor de los valores s&#233;ricos de la PCRas&#46; La aplicaci&#243;n de CPAPn hizo descender&#44; pero no significativamente&#44; las concentraciones de los biomarcadores&#46;</p> <span class="elsevierStyleSectionTitle">Conclusiones</span><p class="elsevierStyleSimplePara elsevierViewall">Mientras que la hipoxemia nocturna en el SAHS es la responsable de las variaciones en los valores del NTproBNP&#44; derivado de la afectaci&#243;n card&#237;aca&#44; el SAHS no parece estar asociado con el biomarcador inflamatorio PCRas&#44; cuando se excluye a los pacientes con alteraciones card&#237;acas&#44; factores de riesgo cardiovascular o en tratamiento farmacol&#243;gico&#46;</p>"
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Original Articles
Hemodynamic and Inflammatory Markers of Sleep Apnea-Hypopnea Syndrome and Nocturnal Hypoxemia: Effects of Treatment With Nasal Continuous Positive Airway Pressure
Amparo Sáncheza,
Corresponding author
arsanchez@nuevoiris.com

Correspondence: Dr A. Sánchez Servicio de Neumología, Hospital Universitario de Salamanca P.º de San Vicente, 58-182 37007 Salamanca, Spain
, Alan R. Schwartzb, Pedro L. Sánchezc, José L. Fernándeza, Jacinto Ramosa, Francisco Martín-Herrerod, Rafael González-Celador, Ricardo Ruano, Irene Bregóna, Cándido Martín-Luengod, Francisco P. Gómeza
a Servicio de Neumología, Hospital Universitario de Salamanca, Salamanca, Spain
b Johns Hopkins Sleep Disorders Center, Department of Medicine, Johns Hopkins University, Baltimore, Maryland, USA
c Servicio de Cardiología, Hospital General Universitario Gregorio Marañón, Madrid, Spain
d Servicio de Cardiología, Hospital Universitario de Salamanca, Salamanca, Spain
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        "resumen" => "<span class="elsevierStyleSectionTitle">Objective</span><p class="elsevierStyleSimplePara elsevierViewall">In this study&#44; we assessed factors associated with cardiovascular risk in patients with sleep apnea-hypopnea syndrome &#40;SAHS&#41; through analysis of plasma concentrations of N-terminal prohormone brain natriuretic peptide &#40;NTproBNP&#41; and high-sensitivity C-reactive protein &#40;hsCRP&#41;&#46; In addition&#44; we analyzed the effect of nasal continuous positive airway pressure &#40;nCPAP&#41; on these markers&#46;</p> <span class="elsevierStyleSectionTitle">Patients and Methods</span><p class="elsevierStyleSimplePara elsevierViewall">Forty-two patients with SAHS &#40;mild to moderate in 15 cases and severe in 27&#41; were compared with 14 individuals without SAHS&#46; The participants were not receiving drug treatment and they did not have diabetes&#44; hypertension&#44; marked dyslipidemia&#44; or cardiovascular disease&#44; which was ruled out both clinically and by echocardiography and <span class="elsevierStyleSup">99m</span>Tc-tetrofosmin scintigraphy at rest and during exercise&#46; The effects of nCPAP in patients with severe SAHS were analyzed after 6 months of treatment&#46;</p> <span class="elsevierStyleSectionTitle">Results</span><p class="elsevierStyleSimplePara elsevierViewall">Following adjustment for age&#44; body mass index&#44; and smoking habit&#44; the mean concentrations of markers were not significantly higher in patients with severe SAHS than in those with mild-to-moderate SAHS or in control subjects&#46; Nevertheless&#44; in patients with SAHS the main factor influencing NTproBNP concentrations was the percentage of time with a nocturnal arterial oxygen saturation of less then 90&#37; &#40;<span class="elsevierStyleItalic">r</span>&#61;0&#46;37&#44;<span class="elsevierStyleItalic">P</span>&#61;&#46;017&#41;&#46; No variables predictive of hsCRP concentration were identified&#46; The concentrations of the markers were reduced by nCPAP&#44; but the differences were not statistically significant&#46;</p> <span class="elsevierStyleSectionTitle">Conclusions</span><p class="elsevierStyleSimplePara elsevierViewall">While nocturnal hypoxemia in SAHS is responsible for variations in the plasma concentration of NTproBNP &#40;as a result of cardiovascular changes&#41;&#44; SAHS appears not to be associated with the inflammatory marker hsCRP when patients with heart disease&#44; cardiovascular risk factors&#44; or those receiving pharmacologic treatment are excluded&#46;</p>"
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        "resumen" => "<span class="elsevierStyleSectionTitle">Objetivo</span><p class="elsevierStyleSimplePara elsevierViewall">Investigamos los factores del s&#237;ndrome de apneas-hipopneas durante el sue&#241;o &#40;SAHS&#41; que activan los mecanismos de riesgo cardiovascular&#44; a trav&#233;s del estudio de las concentraciones plasm&#225;ticas del fragmento N-terminal del precursor del p&#233;ptido natriur&#233;tico cerebral &#40;NTproBNP&#41; y de la prote&#237;na C reactiva de alta sensibilidad &#40;PCRas&#41;&#44; as&#237; como el efecto que sobre ellos tiene el tratamiento con presi&#243;n positiva continua de la v&#237;a a&#233;rea nasal &#40;CPAPn&#41;&#46;</p> <span class="elsevierStyleSectionTitle">Pacientes Y M&#233;todos</span><p class="elsevierStyleSimplePara elsevierViewall">Se estudi&#243; a 42 pacientes con SAHS &#40;leve-moderado en 15 casos y grave en 27&#41;&#44; comparados con 14 personas sin SAHS&#46; No tomaban f&#225;rmacos ni presentaban diabetes&#44; hipertensi&#243;n&#44; dislipemia importante o enfermedad cardiovascular&#44; que se descart&#243; tanto cl&#237;nicamente como por ecocardiograf&#237;a y tomograf&#237;a computarizada por emisi&#243;n de fot&#243;n c&#237;nico-esfuerzo con<span class="elsevierStyleSup">99m</span>Tc-tetrofosmina&#46; En los pacientes con SAHS grave se estudiaron los efectos de 6 meses con CPAPn&#46;</p> <span class="elsevierStyleSectionTitle">Resultados</span><p class="elsevierStyleSimplePara elsevierViewall">Ajustando por edad&#44; &#237;ndice de masa corporal y tabaquismo&#44; las medias de los biomarcadores no fueron significativamente m&#225;s altas en los pacientes con SAHS grave que en aqu&#233;llos con SAHS leve-moderado o en los controles&#46; Sin embargo&#44; en los pacientes con SAHS el principal factor que influy&#243; en las concentraciones de NTproBNP fue el porcentaje de tiempo con saturaci&#243;n arterial de ox&#237;geno nocturna menor del 90&#37; &#40;r &#61; 0&#44;37&#59; p &#61; 0&#44;017&#41;&#44; sin que se encontrara ning&#250;n predictor de los valores s&#233;ricos de la PCRas&#46; La aplicaci&#243;n de CPAPn hizo descender&#44; pero no significativamente&#44; las concentraciones de los biomarcadores&#46;</p> <span class="elsevierStyleSectionTitle">Conclusiones</span><p class="elsevierStyleSimplePara elsevierViewall">Mientras que la hipoxemia nocturna en el SAHS es la responsable de las variaciones en los valores del NTproBNP&#44; derivado de la afectaci&#243;n card&#237;aca&#44; el SAHS no parece estar asociado con el biomarcador inflamatorio PCRas&#44; cuando se excluye a los pacientes con alteraciones card&#237;acas&#44; factores de riesgo cardiovascular o en tratamiento farmacol&#243;gico&#46;</p>"
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