Hiponatremia como factor asociado a mortalidad en pacientes con enfermedad cerebrovascular

Objetivo: Evaluar si la hiponatremia es un factor asociado a mortalidad en pacientes con enfermedad cerebrovascular isquémica en fase aguda en el Hospital Víctor Lazarte Echegaray durante el periodo entre enero del 2015 y julio del 2016. Material Y Método: Realizamos un estudio observacional, analítico, de corte transversal, que evaluó 148 pacientes con enfermedad cerebrovascular isquémica en fase aguda, los cuales fueron distribuidos en dos grupos, los fallecidos 14 pacientes y los sobrevivientes 134 pacientes. Resultados: La edad promedio en los pacientes fallecidos y sobrevivientes fueron 86,07 ± 7,57 vs 81,37 ± 5,73; p < 0,01; el sexo masculino fue 92,86% vs 61,19%; p < 0,05). La hipertensión arterial fue la comorbilidad más frecuente en los fallecidos que en los sobrevivientes (100% vs 64,18%; p < 0,01). El promedio de PAS a la admisión de 164,29 ± 18,69 vs 141,90 ± 11,71 mmHg; p < 0,001. Los niveles de sodio sérico a la admisión fue 132,24 ± 8,50 vs 138,27 ± 6,82; p < 0,01; al categorizar el sodio en hiponatremia se encontró que en los fallecidos 64,29% vs 34,33%; p < 0,05. El análisis multivariado identificó a la edad (ORa = 1,21), la presión arterial sistólica a la admisión (ORa = 1,28) y la hiponatremia (ORa = 5,75) como factores independientemente asociados a mortalidad en pacientes con Enfermedad Cerebrovascular. Conclusiones: La hiponatremia fue el principal factor independientemente asociado a mortalidad en pacientes con enfermedad cerebrovascular isquémica en fase aguda.Objective: To evaluate if hyponatremia is a factor associated with mortality in patients with acute ischemic stroke at Hospital Victor Lazarte Echegaray during the period between January 2010 and July 2016. Material And Methods: We performed an observational, analytical, crosssectional study that evaluated 148 patients with acute ischemic stroke, who were divided into two groups, the deceased 14 patients and the survivors 134 patients. Results: The mean age in the dead and survivor patients was 86.07 ± 7.57 vs 81.37 ± 5.73; p < 0.01; the male sex was 92.86% vs 61.19%; p < 0.05. The hypertension was the most common comorbidity in the dead and in the survivors (100% vs 64.18%, p <0.01). The mean SBP at admission was 164.29 ± 18.69 vs 141.90 ± 11.71 mmHg; p < 0.001. Serum sodium levels at admission were 132.24 ± 8.50 vs 138.27 ± 6.82; p < 0.01; When categorizing sodium in hyponatremia was found that in the dead 64.29% vs 34.33%; p < 0.05. Multivariate analysis identified age (ORa = 1.21), systolic blood pressure at admission (ORa = 1.28) and hyponatremia (ORa = 5.75) as independent factors associated with mortality in patients with stroke. Conclusions: Hyponatremia was the main independent factor associated with mortality in patients with acute ischemic stroke.Tesi

Search for pair-produced vector-like B quarks in proton-proton collisions at s\sqrt{s} = 8 TeV

A search for the production of a heavy B quark, having electric charge -1/3 and vector couplings to W, Z, and H bosons, is carried out using proton-proton collision data recorded at the CERN LHC by the CMS experiment, corresponding to an integrated luminosity of 19.7 inverse femtobarns. The B quark is assumed to be pair-produced and to decay in one of three ways: to tW, bZ, or bH. The search is carried out in final states with one, two, and more than two charged leptons, as well as in fully hadronic final states. Each of the channels in the exclusive final-state topologies is designed to be sensitive to specific combinations of the B quark-antiquark pair decays. The observed event yields are found to be consistent with the standard model expectations in all the final states studied. A statistical combination of these results is performed and upper limits are set on the cross section of the strongly produced B quark-antiquark pairs as a function of the B quark mass. Lower limits on the B quark mass between 740 and 900 GeV are set at a 95% confidence level, depending on the values of the branching fractions of the B quark to tW, bZ, and bH. Overall, these limits are the most stringent to date

Search for supersymmetry with photons in pp collisions at s\sqrt s = 8 TeV

Two searches for physics beyond the standard model in events containing photons are presented. The data sample used corresponds to an integrated luminosity of 19.7 inverse femtobarns of proton-proton collisions at $\sqrt{s}$ = 8 TeV, collected with the CMS experiment at the CERN LHC. The analyses pursue different inclusive search strategies. One analysis requires at least one photon, at least two jets, and a large amount of transverse momentum imbalance, while the other selects events with at least two photons and at least one jet, and uses the razor variables to search for signal events. The background expected from standard model processes is evaluated mainly from data. The results are interpreted in the context of general gauge-mediated supersymmetry, with the next-to-lightest supersymmetric particle either a bino- or wino-like neutralino, and within simplified model scenarios. Upper limits at 95% confidence level are obtained for cross sections as functions of the masses of the intermediate supersymmetric particles

Delaying surgery for patients with a previous SARS-CoV-2 infection

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