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Search Results: 1 - 10 of 91056 matches for " Velarde José Luis "
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Abla o com radiofreqüência do flutter atrial tipo I. Importancia do bloqueio bidirecional do istmo entre a veia cava inferior e o anel da valva tricúspide
Scanavacca Mauricio,Sosa Eduardo,Velarde José Luis,D'ávila André
Arquivos Brasileiros de Cardiologia , 1998,
Abstract: OBJETIVO: Estudar a importancia clínica da determina o eletrofisiológica da presen a de bloqueio bidirecional na condu o pelo istmo localizado entre a veia cava inferior e o anel da valva tricúspide (VCI - AT), após a abla o do flutter atrial tipo I (FL) com radiofreqüência (RF). MéTODOS: Quarenta pacientes consecutivos (idade média 51±11 anos) com FL foram submetidos a abla o do istmo VCI-AT com RF. Em 30 pacientes (GI), o sucesso foi avaliado pela interrup o e n o reindu o do FL com estimula o atrial programada. Nos últimos 10 pacientes foi avaliada também a condu o bidirecional pelo istmo, com cateteres posicionados na sua entrada e saída e em cada lado da linha de bloqueio. O bloqueio foi considerado bidirecional quando ocorrido nos dois sentidos e unidirecional quando ocorrido em um só sentido. RESULTADOS: Vinte e seis (86%) pacientes do GI e 10 (100%) do GII tiveram sucesso imediato (p= 0,5558). Durante o seguimento, 7 (30%) de 23 pacientes do GI e 3 (30%) de 9 do GII tiveram recorrência de FL (p= NS). Os três pacientes do GII que apresentaram recorrência tinham bloqueio unidirecional, enquanto os seis casos sem recorrência tinham bloqueio bidirecional (p=0,012). CONCLUS O: A demonstra o de bloqueio bidirecional no istmo VCI-AT, obtida imediatamente após a abla o do FL com RF, relaciona-se a menor índice de recorrência clínica, devendo ser o critério preferencial para término do procedimento.
Editorial
Héctor Fraire Huacuja,José Luis González-Velarde,Juan Javier González Barbosa
International Journal of Combinatorial Optimization Problems and Informatics , 2012,
Abstract:
Structural and Landscape Analysis for the Robust Capacitated International Sourcing Problem (RoCIS)
Hector Joaquín Fraire Huacuja,José Luis González Velarde,Guadalupe Castilla Valdez
International Journal of Combinatorial Optimization Problems and Informatics , 2010,
Abstract: In this paper the robust capacitated international sourcing problem (RoCIS) is approached. It consists of selecting a subset of suppliers with finite capacity, from an available set of potential suppliers internationally located. This problem was introduced by González-Velarde and Laguna in [1], where they propose a deterministic solution based on tabu search memory strategies. In this work a structural and landscape analysis for the larger problem instances is reported, to try of explain the relative hardness observed when the improved tabu solution [11] is applied to solve the instances.
Seroepidemiological study of herpes simplex virus type 2 in patients with the acquired immunodeficiency syndrome in the city of Niterói, Rio de Janeiro, Brazil
Santos, Flávia Cunha;Oliveira, Solange Artimos de;Setúbal, Sérgio;Camacho, Luiz Antonio Bastos;Faillace, Tereza;Leite, José Paulo Gagliardi;Velarde, Luis Guillermo Coca;,;
Memórias do Instituto Oswaldo Cruz , 2006, DOI: 10.1590/S0074-02762006000300016
Abstract: this study was designed to determine the seroprevalence of herpes simplex virus type 2 (hsv-2) and to evaluate its association with age, sex as well as other demographic and behavioural factors in 150 human immunodeficiency virus (hiv) positive adults patients attending the general medical outpatient ward for routine care of niterói, state of rio de janeiro, brazil. serum samples were screened for hsv-2 antibodies using an indirect elisa. eighty-three patients were men (mean age: 38.8) and 67 were women (mean age: 35.4). the estimated prevalence of hsv-2 was 52% (95% ci: 44-60%) and it was higher among men (53%) than among women (50.7%). overall, the age of first sexual intercourse and past history of genital herpes were associated with hsv-2 seropositivity. analysis by gender disclosed significant association of number of lifetime sex partners only among men. although hsv-2 antibodies were frequent in the study group, genital herpes was reported by 21.8% of the hsv-2 positive subjects, indicating low awareness of the hsv-2 infection. these results may have public health importance for brazil as the high rate of hsv-2 infection may act as a cofactor of hiv transmission.
Abla??o com radiofreqüência do flutter atrial tipo I. Importancia do bloqueio bidirecional do istmo entre a veia cava inferior e o anel da valva tricúspide
Scanavacca, Mauricio;Sosa, Eduardo;Velarde, José Luis;D'ávila, André;Hachul, Denise;Reol?o, Basileu;Sanches, Osvaldo;Silva, Márcio;Darrieux, Francisco;
Arquivos Brasileiros de Cardiologia , 1998, DOI: 10.1590/S0066-782X1998001100011
Abstract: purpose: to determine the clinical importance of a bi-directional line of block demonstration in the inferior vena cava-tricuspid annulus isthmus as an end-point for radiofrequency (rf) atrial flutter (fl) ablation. methods: forty consecutive patients (51±11 years) with type i fl were divided in 2 groups: gi (30 patients) anatomic, non-electrophysiologic isthmus ablation technique (interruption and non-induction fl criteria); and gii (10 patients) anatomic with electrophysiologic evaluation of bi-directional isthmus conduction. the isthmus activation was analyzed before and after anatomic rf ablation with a cateter exploring each side of the line of block, depending on the conduction evaluation (anterograde or retrograde). results: fl was interrupted and not reinduced in 26/30 (86.6%) gi patients and in 10 (100%) gii patients (p= 0.5558). during follow-up fl recurred in 30% of the patients in both groups. in gii, 6 patients with bi-directional block remained assymptomatic, whereas 3 patients with unidirectional block presented recurrence (p= 0.012). conclusion: electrophysiologic demonstration of bi-directional line of block in the isthmus is related to long-term success and should be the criterion for interruption of type i atrial fl rf ablation.
Short-time dynamics of monomers and dimers in quasi-two-dimensional colloidal mixtures
Erick Sarmiento-Gómez,José Ramón Villanueva-Valencia,Salvador Herrera-Velarde,José Arturo Ruíz-Santoyo,Jesús Santana-Solano,José Luis Arauz-Lara,Ramón Casta?eda-Priego
Physics , 2015,
Abstract: We report on the short-time dynamics in colloidal mixtures made up of monomers and dimers highly confined between two glass-plates. At low concentrations, the experimental measurements of colloidal motion agree well with the solution of the Navier-Stokes equation at low Reynolds numbers, which takes into account the increase of the drag force on each particle due to wall-particle hydrodynamic forces. We find that the ratio of the short-time diffusion coefficients of the monomer and that of the center of mass of the dimer remains independent of both the total packing fraction and the dimer molar fraction up to concentrations near to the crystallization transition. The same physical scenario is observed for the ratio between the parallel and perpendicular components of the short-time diffusion coefficients of the dimer. This dynamical behavior is corroborated by means of Molecular Dynamics computer simulations that explicitly include the particle-particle hydrodynamic forces induced by the solvent. Thus, our results point out toward that the effects of the particle-particle hydrodynamic interactions on the diffusion coefficients are identical and, thus, factorable in both species.
Grado de correlación en la percepción de la dinámica familiar entre ambos padres de preescolares que acuden a Guarderías del DIF Jalisco
Nápoles-Rodríguez, Francisco;Cevallos-González, Angélica;Sánchez-Talamantes, Eva;González-Rico, José Luis;Romero-Velarde, Enrique;Vásquez-Garibay, Edgar M.;
Boletín médico del Hospital Infantil de México , 2005,
Abstract: introduction. objective: to test the correlation of the family dynamic score between fathers and mothers of preschool children attending the integral development of the family system (dif) of guadalajara city. material and methods. in a cross sectional study design 140 family dynamic surveys were included. eight areas of the dynamic of the family of both parents were explored: i. dynamic of the couple; ii. formation of identity; iii. communication, expression and solidarity; iv. structure of the authority;v. management of the conflict and aggressiveness;vi. discipline and method;vii. system of values;viii. socio cultural integration and isolation. results. there were not differences between fathers and mothers in the eight explored areas.the score of fathers and mothers had a significant correlation (r =0.759). area i had the higher correlation with the rest of the areas (p <0.005).the correlation among different areas of father and mother were also significant. it was no correlation of area iii of fathers vs area ii and viii of mothers; area iv of fathers vs area i, ii,vii and viii of mothers. conclusion. the strong correlation of the family dynamic score of each couple and among the majority of reciprocal areas gives a high consistency to the instrument of evaluation.
In Vitro Evaluation of Fasciolicide Activity with Hexane, Methanol and Ethyl Acetate with Extracts Processed and Obtained from Some Mexican Plants Used in Traditional Medicine Based on Ethno Botanical Studies  [PDF]
Stephanie Ibarra-Moreno, Froylán Ibarra-Velarde, José Guillermo ávila-Acevedo
American Journal of Plant Sciences (AJPS) , 2012, DOI: 10.4236/ajps.2012.34060
Abstract: Fasciolosis is a parasitic disease of world distribution affecting mainly domestic ruminants. The control of this disease is carried out using chemical fasciolicides which, in some cases, have been observed to have environmental problem such us pollution resistance. An alternative is to investigate extracts from plants with anti-Fasciola hepatica effects, taking advantage of the great diversity of flora of our country. The aim of this paper is to identify, assess and elucidate the anti-Fasciola hepatica effect in vitro using antiparasitic extracts of some plants used in Mexican ethno botany. We collected, dried, processed and tested in vitro about 20 plants with their respective chemical elements (hexane, ethyl acetate and methanol), obtaining results of a total of 60 extracts tested. The in vitro evaluations were carried out for 3 days, and the efficacy of each extract was compared with an untreated control group. Each test was repeated 6 times with 13 extracts that showed greater fasciolocide activity. Results from these 13 extracts tested ranged from 80% to 100% activity and the plants tested were: Castela tortuosa (chaparro amargo), Achillea millefolium (plumajillo), Thymus vulgaris (thyme), Justicia spicigera (muicle), Limpia critridora (cedron), Populus alba (Alamo), Mentha piperita (mint), Chenopodium graveolens (epazote de zorrillo), Lippia graveolens (oregano), Artemisia mexicana (estafiate) and Artemisia absinthium (wormwood), which is the hexane variable which showed higher fasciolicide capacity; using a dose of 500 gr/Lt in all the trials. Further in vitro studies should be conducted to obtain the LD50 of each extract to be able to isolate the main active element found in the hexane variable.
Asociación de Hemiptera: Triozidae con la enfermedad 'permanente del tomate' en México
Garzón-Tiznado, José Antonio;Cárdenas-Valenzuela, Oralia Guadalupe;Bujanos-Mu?iz, Rafael;Marín-Jarillo, Antonio;Becerra-Flora, Alicia;Velarde-Felix, Sixto;Reyes-Moreno, Cuauhtémoc;González-Chavira, Mario;Martínez-Carrillo, José Luis;
Agricultura técnica en México , 2009,
Abstract: the disease known as 'permanente del tomate' produces the greatest damage in those regions where tomato plantings are established in the spring-summer season. the etiology of this disease has been related to non-cultured type bacteria and its transmission with the psillid bactericera (=paratrioza) cockerelli (sulc) (hemiptera: triozidae). the objective of this research was to discern the association between the psillid and the disease. the obtention of inoculum and the bioassay s for transmission were performed in entomological cages under greenhouse conditions. transmission from tomato plant to tomato plant was performed through grafting from plants that showed the characteristic symptoms of the disease in the field. tissue from diseased plants and from the psillid was analyzed by pcr, hybridization and sequenciation of cloned products. the reproduction of the disease symptoms was observed in tomato plants grafted and in plants exposed to b. cockerelli. bioassays of transmission of this pathogen by the insect were positive, and the acquisition periods were: 15 min, 2, 3 and 48 h for nymphs and 30 min, 2, 3, 8 and 48 h for adults, with transmission periods of 15 min, 2 and 24 h for adults and 24 h of incubation. the product of pcr of b cockerelli was cloned and partially sequenced and registered in the gene bank with the number dq355020, this sequence presented 99% similarity with accessions dq355018 and dq355019 obtained from diseased tomato plants with permanente del tomate, which confirms the association between the insect and the disease.
Evaluación de dos pruebas de inmunoblot con antígeno hidatídico de caprino y ovino para el diagnóstico de equinococosis humana
Miranda,Eduardo; Velarde,franko; Somocurcio,José; Ayala,Eduardo;
Revista Peruana de Medicina Experimental y Salud Pública , 2010, DOI: 10.1590/S1726-46342010000200008
Abstract: to estimate the diagnosis value of goat and ovine antigen for echinococcosis immunoblot test, 135 serums were used, of which 70 were coming from patients with hydatid disease confirmed by the finding of proto scolex and membrane in the pathology study of surgical piece, 45 from patients with other parasitic diseases and 20 apparently healthy people. the sensitivity, the specificity, positive and negative predictive value of immunoblot test, with hidatyd antigen of goat was of 92.8%, 100%, 100%, 92.8%, respectively, than for ovine antigen was 91.4%, 95.3%, 95.5%, 91.1%, respectively. kappa index was 0.93 for goat antigen and 0.86 with sheep in relation to the pathological study. we recommended the use of both antigens for the serologic diagnosis of human echinococcosis.
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