oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 524 )

2018 ( 713 )

2017 ( 706 )

2016 ( 982 )

Custom range...

Search Results: 1 - 10 of 408788 matches for " Marta M. Rivero Varona "
All listed articles are free for downloading (OA Articles)
Page 1 /408788
Display every page Item
Valor pronóstico de factores obtenidos por métodos no invasivos en el infarto agudo del miocardio Prognostic value of factors obtained by non-invasive methods in acute myocardial infarction
Javier Almeida Gómez,Marta Mirella Rivero Varona,Tomás Méndez Peralta,Juan Sterling Duarte
Revista Cubana de Medicina , 2007,
Abstract: Se hizo un estudio longitudinal prospectivo de 64 pacientes infartados, mediante una prueba ergométrica valorativa, ecocardiograma y Holter antes del alta, para evaluar el papel pronóstico de algunos factores medidos por métodos no invasivos en la evolución de los pacientes con infarto agudo del miocardio. Se halló que 70 % de los pacientes fallecidos presentaron alguna alteración en el segmento ST durante la prueba ergométrica, el 100 % presentó síntomas a bajas cargas, incremento de la TA menor de 10 mmHg y variación ST/FC de alto riesgo; la mitad de ellos sufrió arritmias ventriculares; el 100 % de los fallecidos tenían VI remodelado y 70 %, un patrón de llenado restrictivo. La media de la FEVI de los fallecidos fue menor que en los no fallecidos. El índice de la motilidad parietal (IMP) promedio también se correlacionó con la mortalidad. La VFC de los fallecidos fue de 52,2±8,05 y los no fallecidos de 122,74±33,2. La variabilidad de la frecuencia cardíaca (SDANN) menor de 55 ms predijo una mayor mortalidad. A longitudinal and prospective study of 64 infarction patients was conducted by a valorative ergometric test, echocardiogram and Holter before discharge, to evaluate the prognostic role of some factors measured by non-invasive methods in the evolution of the patients with acute myocardial infarction. It was found that 70 % of the dead patients had some alteration in the ST segment during the ergometric test, 100 % presented symptoms at low loads, increase of the arterial pressure under 10 mmHg and high risk variation of ST / HR. Half of them suffered from ventricular arrhitmias. 100 % of the dead had had remodelled VI, whereas 70 % had a restrictive filling pattern. The mean LVEF of the dead was lower than that of the living. The average parietal motility index (PMI) was also correlated to mortality . The heart rate variability (HRV) of the dead was 52.2 ± 8.05 and that of the living patients was 122.74 ± 33.2. The variability of the heart rate ( SDANN ) under 55 ms predicted a higher mortality.
Valor pronóstico de factores obtenidos por métodos no invasivos en el infarto agudo del miocardio
Almeida Gómez,Javier; Rivero Varona,Marta Mirella; Méndez Peralta,Tomás; Sterling Duarte,Juan; Valdés Recarey,Manuel;
Revista Cubana de Medicina , 2007,
Abstract: a longitudinal and prospective study of 64 infarction patients was conducted by a valorative ergometric test, echocardiogram and holter before discharge, to evaluate the prognostic role of some factors measured by non-invasive methods in the evolution of the patients with acute myocardial infarction. it was found that 70 % of the dead patients had some alteration in the st segment during the ergometric test, 100 % presented symptoms at low loads, increase of the arterial pressure under 10 mmhg and high risk variation of st / hr. half of them suffered from ventricular arrhitmias. 100 % of the dead had had remodelled vi, whereas 70 % had a restrictive filling pattern. the mean lvef of the dead was lower than that of the living. the average parietal motility index (pmi) was also correlated to mortality . the heart rate variability (hrv) of the dead was 52.2 ± 8.05 and that of the living patients was 122.74 ± 33.2. the variability of the heart rate ( sdann ) under 55 ms predicted a higher mortality.
Alteraciones de la prueba ergométrica en pacientes con fibromialgia Alterations of the ergometric test in patients with fibromyalgia
Ana del Carmen Argüelles Zayas,Adalberto Infante Amorós,Marta M. Rivero Varona,Rosa María Flores Sánchez
Revista Cubana de Medicina , 2004,
Abstract: La fibromialgia es uno de los síndromes reumáticos más comunes, caracterizado por dolores musculoesqueléticos y puntos dolorosos sin existir sinovitis ni miositis. Se estudiaron 20 pacientes con diagnóstico de fibromialgia para conocer, mediante la prueba ergométrica, las alteraciones del sistema nervioso autónomo. Se observó, en el grupo control, un incremento normal de la frecuencia al adoptar el ortostatismo lo cual refleja activación del sistema simpático, mientras que en las pacientes con fibromialgia no existió dicho reflejo. Se comprobó incremento adecuado de la tensión arterial en el 87 % de las pacientes con fibromialgia, infradesnivel del ST mayor de 1 mm en el 20 % de las pacientes, ausencia de arritmia y síntomas de cardiopatía en todas las pacientes y disminución de la capacidad física en 4.Se concluyó que las pacientes con fibromialgia presentan una disfunción del sistema nervioso autónomo. Fibromyalgia is one of the commonest rheumatic symptoms, characterized by musculoskeletal pain and painful points with neither synovitis nor myositis. 20 patients with diagnosis of fibromyalgia were studied to know the alterations of the autonomous nervous system by the ergometric test. In the control group, it was observed a normal increase of frequency on adopting orthostatism, which reflects the activation of the sympathetic system. This reflex did not exist among the patients with fibromyalgia. An adequate rise of the arterial pressure in 87 % of the patients with fibromyalgia, an infraunevenness of the ST over 1 mm in 20 % of the patients, an absence of arrhytmia and symptoms of heart disease in all patients, and a reduction of physical capacity in 4, were proved. It was concluded that patients with fibromyalgia present a dysfunction of the autonomous nervous system.
Alteraciones de la prueba ergométrica en pacientes con fibromialgia
Argüelles Zayas,Ana del Carmen; Infante Amorós,Adalberto; Rivero Varona,Marta M.; Flores Sánchez,Rosa María; Suárez Fleites,Reynaldo;
Revista Cubana de Medicina , 2004,
Abstract: fibromyalgia is one of the commonest rheumatic symptoms, characterized by musculoskeletal pain and painful points with neither synovitis nor myositis. 20 patients with diagnosis of fibromyalgia were studied to know the alterations of the autonomous nervous system by the ergometric test. in the control group, it was observed a normal increase of frequency on adopting orthostatism, which reflects the activation of the sympathetic system. this reflex did not exist among the patients with fibromyalgia. an adequate rise of the arterial pressure in 87 % of the patients with fibromyalgia, an infraunevenness of the st over 1 mm in 20 % of the patients, an absence of arrhytmia and symptoms of heart disease in all patients, and a reduction of physical capacity in 4, were proved. it was concluded that patients with fibromyalgia present a dysfunction of the autonomous nervous system.
Lesión carotídea extracraneal asintomática y su asociación con cardiopatía isquémica silente
Hernández Pino,Yadira; González Escudero,Hilda; Pacheco Granja,Griselda; Rivero Varona,Martha M.;
Revista Cubana de Medicina , 2006,
Abstract: 71 patients of both sexes aged 60-75 who were diagnosed extracranial carotid damage, but were asymptomatic from the neurological and cardiovascualr point of view, were studied. all of them underwent high resolution color carotid echodoppler and were divided into categories, according to the vascular damage: 30 with intima media thickness >1,1 mm and 41 con stenosis, in addition to a control group of 30 subjects with vascular risk factor without carotid injury. ekg and an ergometric test were performed in all the individuals to define the diagnosis of silent ischemic heart disease. this diagnostic tool was modified for the elderly. recommendations of conditioning and preventive measures were included for any complication.the variables were codified in a computerized database, and contingency (doble entry) tables were made. chi square test was used for the qualitative variables to evaluate the association between the variables of interest, whereas the t students' test was applied to the quantitative variables.the results were considered significant when the probability of association of the tests was < 0.05. the time of action of the vascular risk factors showed a close relation to the carotid damage, mainly smoking (38.2 years as an average). the behavior of the action of the risk factors on the coronary arteries was evidenced in this same order of frequency by the ergometric test. the coincident relation between the carotid and the coronary damage was proved. there was a higher percentage of positive ergometric tests among the elderly with carotid stenosis (57.7 %).
Lesión carotídea extracraneal asintomática y su asociación con cardiopatía isquémica silente Carotid extracranial asymptomatic injury and its association with silent ischemic heart disease
Yadira Hernández Pino,Hilda González Escudero,Griselda Pacheco Granja,Martha M. Rivero Varona
Revista Cubana de Medicina , 2006,
Abstract: Se estudiaron 71 pacientes de los dos sexos, con edades comprendidas entre los 60 y 75 a os, a quienes se les diagnosticó da o carotídeo extracraneal, pero se mantenían asintomáticos desde el punto de vista neurológico y cardiovascular. A todos se les realizó ecodoppler carotídeo a color de alta resolución y quedaron agrupados en 2 categorías, según da o vascular: 30 pacientes con engrosamiento íntima media > 1,1 mm y 41 con estenosis, además, un grupo control de 30 sujetos con factores de riesgo vascular sin lesión carotídea. A todos se les realizó electrocardiograma y prueba ergométrica para definir diagnóstico de cardiopatía isquémica silente. En relación con este medio diagnóstico, se realizaron modificaciones propias para el anciano, incluyendo recomendaciones de acondicionamiento y medidas preventivas para cualquier complicación. Además, se establecieron contraindicaciones específicas, criterios clínicos y electrocardiográficos de positividad y severidad. Las variables se codificaron en una base de datos computarizada, se realizaron tablas de contingencia (de doble entrada); para las variables cualitativas se empleó el test Chi2 para evaluar asociación entre las variables de interés, y para las cuantitativas, el t Student para comparar los promedios en las variables analizadas. Los resultados se consideraron significativos cuando la probabilidad de asociación de los tests fue < 0,05. De los 101 pacientes que constituyeron la muestra, la distribución por sexo fue de 73 femeninos y 28 masculinos. El tiempo de acción de los factores de riesgo vascular mostró íntima relación con el da o carotídeo, fundamentalmente el hábito de fumar (38,2 a os como promedio), seguido por la hipertensión arterial (13,8 a os) y por la diabetes mellitus (10,5 a os). En ese mismo orden de frecuencia, se evidenció el comportamiento de la acción de los factores de riesgo sobre las arterias coronarias por medio de la prueba ergométrica. Se demostró la relación coincidente entre el da o carotídeo y coronario; los ancianos con estenosis carotídea fueron los de mayor porcentaje de pruebas ergométricas positivas (57,7 %), le siguió el engrosamiento íntima media (38,5 %), y para el grupo control solo un 3,8 %. 71 patients of both sexes aged 60-75 who were diagnosed extracranial carotid damage, but were asymptomatic from the neurological and cardiovascualr point of view, were studied. All of them underwent high resolution color carotid echodoppler and were divided into categories, according to the vascular damage: 30 with intima media thickness >1,1 mm and 41 con stenosis, in addit
Influencia familiar en el tabaquismo de los adolescentes
García Roche,René G.; Varona Pérez,Patricia; Hernández Sánchez,Mariela; Chang de la Rosa,Marta; Bonet Gorbea,Mariano; García Pérez,Rosa M.;
Revista Cubana de Higiene y Epidemiolog?-a , 2008,
Abstract: the adolescent is exposed to risk factors as smoking, in which the family plays a very significant role. this paper describes the family influence on smoking in adolescents aged 15-19, within the framework of the ii national survey of risk factors of non-communicable diseases done in cuba in 2001. 1 915 adolescents from 8 847 families were interviewed. percentages and odds ratios with 95 % of confidence intervals (ci) were calculated. life prevalence and the present smoking habit in adolescents were 12.7 % and 9.0 %, respectively. male adolescents smoke more (11.5 %) than females (6.3 %). the family history of smoking significantly influences on the tobacco consumption among female adolescents, although the present proportion of cuban adolescents consuming tobacco is lower than in other periods and in other countries.
La formación de usuarios en el uso de la información médica en el municipio de Matanzas Educating users in using medical information at the municipality of Matanzas
Libertad Escobar Blanco,Lourdes García Suárez,Marta Lidia Rivero Llop,Jesús Méndez Martínez
Revista M??dica Electr?3nica , 2009,
Abstract: Esta investigación está basada en la problemática de la formación de usuarios, la cual presenta poca asistencia a los cursos de formación que se imparten en el Centro Provincial de Información de Ciencias Médicas, del área de Versalles, municipio de Matanzas. Se revisó la literatura nacional e internacional de la temática de formación de usuarios de la información para ver su comportamiento en el mundo y en Cuba, realizando la exposición de los antecedentes históricos de la formación de usuarios como tarea fundamental del servicio de referencia. Se explicó las ventajas del conocimiento en el manejo de la biblioteca tradicional para poder enfrentarse a las bibliotecas virtuales y digitales, como recurso de información, investigando el conocimiento que tienen nuestros usuarios de la red de Infomed y la Alfabetización Informacional y aplicando a los usuarios una encuesta de 6 preguntas para saber si éstos conocen de los cursos de formación. Estos resultados se muestrearon en tablas, a los cuales se les aplican el porcentaje. Se analizaron los resultados obtenidos y se emitieron como conclusiones que la formación de usuarios en los centros encuestados necesitan mejorar su actividad con nuevas ideas y retos, pero apoyándose en los conocimientos de la biblioteca tradicional. This investigation is based on the problem of educating users, who have poor assistance to the educating courses carried out at the Provincial Center of Medical Sciences Information, at the Versalles area, municipality of Matanzas. We reviewed the national and international literature on the theme of educating information users to find how it behaves in the world and in Cuba, exposing the historical antecedents of educating users as main task of the reference service. We explained the advantage of managing traditional libraries to be able of working with digital and virtual libraries as information source, investigating the knowledge our users have on Infomed and informational alphabetization, applying the users a six-question survey to find out if they know about these education courses. The results are showed up in tables, to which the percentage was applied. The obtained results were analyzed and the conclusions are that the centers where the surveys were applied have to improve their activity with new ideas and challenges, but based on the knowledge of the traditional library.
La formación de usuarios en el uso de la información médica en el municipio de Matanzas
Escobar Blanco,Libertad; García Suárez,Lourdes; Rivero Llop,Marta Lidia; Méndez Martínez,Jesús; López Himely,Ana;
Revista M??dica Electr?3nica , 2009,
Abstract: this investigation is based on the problem of educating users, who have poor assistance to the educating courses carried out at the provincial center of medical sciences information, at the versalles area, municipality of matanzas. we reviewed the national and international literature on the theme of educating information users to find how it behaves in the world and in cuba, exposing the historical antecedents of educating users as main task of the reference service. we explained the advantage of managing traditional libraries to be able of working with digital and virtual libraries as information source, investigating the knowledge our users have on infomed and informational alphabetization, applying the users a six-question survey to find out if they know about these education courses. the results are showed up in tables, to which the percentage was applied. the obtained results were analyzed and the conclusions are that the centers where the surveys were applied have to improve their activity with new ideas and challenges, but based on the knowledge of the traditional library.
Carcass conformation and fat cover scores in beef cattle: A comparison of threshold linear models vs grouped data models
Joaquim Tarrés, Marta Fina, Luis Varona, Jesús Piedrafita
Genetics Selection Evolution , 2011, DOI: 10.1186/1297-9686-43-16
Abstract: Five threshold models were compared in this study: three threshold linear models, one including slaughterhouse and sex effects, along with other systematic effects, with homogeneous thresholds and two extensions with heterogeneous thresholds that vary across slaughterhouses and across slaughterhouse and sex and a generalised linear model with reverse extreme value errors. For this last model, the underlying variable followed a Weibull distribution and was both a log-linear model and a grouped data model. The fifth model was an extension of grouped data models with score-dependent effects in order to allow for heterogeneous thresholds that vary across slaughterhouse and sex. Goodness-of-fit of these models was tested using the bootstrap methodology. Field data included 2,539 carcasses of the Bruna dels Pirineus beef cattle breed.Differences in carcass conformation and fat cover scores among slaughterhouses could not be totally captured by a systematic slaughterhouse effect, as fitted in the threshold linear model with homogeneous thresholds, and different thresholds per slaughterhouse were estimated using a slaughterhouse-specific threshold model. This model fixed most of the deficiencies when stratification by slaughterhouse was done, but it still failed to correctly fit frequencies stratified by sex, especially for fat cover, as 5 of the 8 current percentages were not included within the bootstrap interval. This indicates that scoring varied with sex and a specific sex per slaughterhouse threshold linear model should be used in order to guarantee the goodness-of-fit of the genetic evaluation model. This was also observed in grouped data models that avoided fitting deficiencies when slaughterhouse and sex effects were score-dependent.Both threshold linear models and grouped data models can guarantee the goodness-of-fit of the genetic evaluation for carcass conformation and fat cover, but our results highlight the need for specific thresholds by sex and slaughterhous
Page 1 /408788
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.