Listar Producción científica por autor "Vargas, Enrique"
Mostrando ítems 21-40 de 85
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Efectos del tabaquismo en una población de altura (La Paz- Bolivia 3600 m.)
Spielvogel, Hilde; Antezana, Gerardo; Aparicio, Octavio; Bellido, Diva; Nallar, Nancy; Quintela, Aida; Peñaloza, Rosario; Tellez, Wilma; Vargas, Enrique; Villena, Mercedes (Revista Boliviana de Nefrología, 1990) -
Estudio de la circulación pulmonar a propósito de la oclusión temporal de la arteria pulmonar en sujetos normales de elevadas altitudes
Antezana, Gerardo; Paz Zamora, Mario; Vargas, Enrique; Coudert, Jean; Bisseliches, F; Lockhart, Allan; Briançon, L (Instituto Boliviano de Biología de Altura, 1973) -
Estudio en doble ciego del efecto de la almitrina sobre los enfermos portadores de eritrocitosis - patológica de altura
Villena, Mercedes; Vargas, Enrique; Guenard, Hervé; Nallar, Nancy; Téllez, Wilma; Spielvogel, Hilde (Instituto Boliviano de Biología de Altura, 1987)Resumen. La eritrocitosis patológica de altura (EPA) es una afección caracterizada por una disminución importante de la sensibilidad a la hipoxia y a la hipercapnea que conduce a una hipoxemia con eritrocitosis excesiva ... -
Evidence that parent-of-origin affects birth-weight reductions at high altitude
Bennett, Adam; Sain, Stephen R; Vargas, Enrique; Moore, Lorna G (American Journal of Human Biology, 2008-02-19)Abstract. Hypoxia exerts a profound depressant effect on fetal growth, lowering birth weight, and raising mortality risk. Multigenerational high-altitude populations are relatively protected from this birth-weight decline, ... -
Excessive polycythemia occurs in young high-altitude (3600 m) residents in the absence o lung disease
Vargas, Enrique; Villena, Mercedes; Salinas, Carlos; Rodríguez, Armando; Téllez, Wilma; Spielvogel, Hilde; Bellido, Diva (Health & height proceeding, 2002)Summary. Chronic mountain sickness is present in about 8% of the male population of La Paz. Our question was whether its principal diagnostic sign, excessive polycythemia (EP) without lung disease could be found already ... -
Excessive polycythemia occurs in young high-altitude (3600 M) residents in the absence of lung disease
Vargas, Enrique; Villena, Mercedes; Salinas Salmón, Carlos E; Rodríguez, Armando; Spielvogel, Hilde; Téllez, Wilma; Bellido, Diva (High Altitude Medicine & Biology, 2002-04-18)Objective: Chronic Mountain Sickness occurs in , 8% of the La Paz population. We asked whether its primary diagnostic sign, excessive polycythemia (EP), occurred in youngeraged persons without lung disease. Methods: ... -
Factores predominantes en la etiopatogenia de la enfermedad de Monge (EPA) en La Paz, Bolivia (3.600 - 4.000 m.)
Vargas, Enrique; Villena C, Mercedes (IFEA, 1993)Resumen. Se presenta una síntesis de los principales estudios de la función respiratoria en pacientes portadores de la “Enfermedad de Monge” o Eritrocitosis Patológica de Altura (EPA), entidad nosológica de carácter ... -
Fútbol en la altura en Bolivia
Spielvogel, Hilde; Vargas, Enrique; Soria Sánchez, Rudy; Salinas Salmón, Carlos E; Villena, Mercedes (Cuadernos del Hospital de Clínicas, 2009)RESUMEN. El presente trabajo se realizó en razón del tercer veto emitido por la FIFA, de jugar partidos eliminatorios para Copas Mundiales de Fútbol en alturas por encima de los 2500 m. Los objetivos del estudio se basaron ... -
Gases en sangre
Vargas, Enrique (s.n., 1986)La hematosis constituye una importante etapa fisiológica en el curso de la cual se efectúan los intercambios gaseosos entre la sangre que llega por los capilares pulmonares y el medio gaseoso intra-alveolar, es decir la ... -
Graduated effects of high-altitude hypoxia and highland ancestry on birth size
Soria, Rudy; Julian, Colleen Glyde; Vargas, Enrique; Moore, Lorna G; Giussani, Dino A (Pediatric Research, 2013-10-02)Background: We present a cohort of ca. 25,000 birth records from Bolivia of men and women who are currently adults. We used this cohort to test the hypothesis that high altitude reduces birth weight and that highland ... -
Greater uterine artery blood flow during pregnancy in multigenerational (Andean) than shorter-term (European) high-altitude residents
Wilson, Megan J; López, Miriam; Vargas, Marco; Julian, Colleen Glyde; Téllez, Wilma; Rodríguez, Armando; Bigham, Abigail; Armaza, J Fernando; Niermeyer, Susan; Shriver, Mark; Vargas, Enrique; Moore, Lorna G (Am J Physiol Regul Integr Comp Physiol, 2007)Multigenerational (Andean) compared with shorter-term (European) high-altitude residents exhibit less hypoxia-associated reductions in birth weight. Because differences in arterial O2 content are not responsible, we ... -
Hemoglobin concentration of high-altitude Tibetans and Bolivian Aymara
Beall, Cynthia M; Brittenham, Gary M; Strohl, Kingman P; Blangero, John; Williams-Blanguero, Sarah; Goldstein, Melvyn C; Decker, Michael J; Vargas, Enrique; Villena, Mercedes; Soria, Rudy; Alarcón, Ana María; Gonzales, Cristina (American Journal of Physical Anthropology, 1998)Abstract. Elevated hemoglobin concentrations have been reported for high-altitude sojourners and Andean high-altitude natives since early in the 20th century. Thus, reports that have appeared since the 1970s describing ... -
La hemoglobina como factor de incremento en la difusión alvéolo-capilar en habitantes de altura
Vargas, Enrique; Villena, Mercedes; Videa, Ricardo; Nallar, Nancy de; Rodríguez, Nancy V. de; Pasquis, Pierre (Instituto Boliviano de Biología de Altura, 1983)RESUMEN. La capacidad de difusión alvéolo-capilar (DLCO) fue determinada usando el método en estado de equilibrio (Steady State) en nativos de altura (3.600 m). Se realizó un estudio estadístico mediante coeficientes de ... -
Hemoglobinas en eritrocitósicos que habitan en altura
Galarza Guzmán, Mario; Vargas, Enrique; Villena, Mercedes (Instituto Boliviano de Biología de Altura, 1987)Resumen. Con el fin de establecer las alteraciones cuali-cuantitativas de las hemoglobinas en la eritrocitosis, se estudiaron las hemoglobinas de 68 pacientes, correspondiendo 54 casos a eritrocitosis secundaria y 14 a ... -
High altitude metahemoglobinemia
Arnaud, Jacques; Gutiérrez, Nancy; Vargas, Enrique; Tellez, Wilma ([s.n.], 1984)SUMMARY. All high altitudes the human erythrocyte, subject to a permanent hypoxy, is the site of metabolic changes among which metahemoglobin has drawn our attention. The present work presents an. argument in favor of the ... -
High-altitude ancestry protects against hypoxia-associated reductions in fetal growth
Julian, Colleen Glyde; Vargas, Enrique; Armaza, J Fernando; Wilson, Megan J; Niermeyer, Susan; Moore, Lorna G (Archives of Disease in Childhood-Fetal and Neonatal, 2007-02-28)Objective: The chronic hypoxia of high-altitude (>2500 m) residence has been shown to decrease birth weight in all populations studied to date. However, multigenerational high-altitude populations appear protected relative ... -
High-altitude ancestry protects against IUGR and reductions in birth weight associated with high altitude and preeclampsia
Julian, Colleen Glyde; Vargas, Enrique; MacCannell, Wendy; Armaza, Fernando; Moore, Lorna G (High Altitude Medicine & Biology, 2005-02-22)Background. Observations consistently demonstrate diminished birth weight [BW] with ascending altitude; however population comparisons reveal the extent of BW reduction depends, in part, upon high-altitude ancestry. ... -
High-end arteriolar resistance limits uterine artery blood flow and restricts fetal growth in preeclampsia and gestational hypertension at high altitude
Browne, Vaughn A; Toledo-Jaldín, Lilian; Dávila, R Daniela; López, Luis P; Yamashiro, Henry; Cioffi-Ragan, Darleen; Julian, Colleen Glyde; Wilson, Megan J; Bigham, Abigail W; Shriver, Mark D; Honigman, Benjamín; Vargas, Enrique; Roach, Robert; Moore, Lorna G (Am J Physiol Regul Integr Comp Physiol, 2011)The reduction in infant birth weight and increased frequency of preeclampsia (PE) in high-altitude residents have been attributed to greater placental hypoxia, smaller uterine artery (UA) diameter, and lower UA blood ... -
Higher estrogen levels during pregnancy in Andean than European residents of high altitude suggest differences in aromatase activity
Charles, Shelton M; Julian, Colleen Glyde; Vargas, Enrique; Moore, Lorna G (J Clin Endocrinol Metab, 2014-08)Context: Uteroplacental hypoxia has been reported to lower estrogen levels in preeclampsia as the result of reduced aromatase activity. Objective: We asked whether the chronic hypoxia of residence at high altitude in the ... -
Hipoxia arterial crónica, eritrocitosis excesiva y cor pulmonar en La Paz (360 M)
Vargas, Enrique ([s.n.], 2002)