1,536 research outputs found

    Analytic Approach to the Operation of RTD Ternary Inverters Based on MML

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    Open Access.Multiple-valued Logic (MVL) circuits are one of the most attractive applications of the Monostable-to-Multistable transition Logic (MML), and they are on the basis of advanced circuits for communications. However, a proper design is not inherent to the usual MML circuit topologies. This paper analyses the case of an MML ternary inverter, and determines the relations that circuit representative parameters must verify to obtain a correct behaviour.This work has been funded by the Spanish Government under project NDR, TEC2007- 67245/MIC, and the Junta de Andalucía through the Proyecto de Excelencia TIC-2961.Peer Reviewe

    Factor predictor de la latencia de la onda V en el umbral de disconfort de las frecuencias de 500 HZ en sujetos normoyentes

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    49 p.En la presente investigación se busca determinar cual es la correlación que existe entre los niveles auditivos de disconfort (LDL) en las frecuencias de 500 Hz y las latencias de la onda V con estímulo tonal que entrega el Potencial evocado auditivo de Troncoencéfalo (PEAT), en sujetos normoyentes. Los objetivos establecer la latencia de la onda V del PEAT tonal de 500 Hz. y Relacionar la latencia de la onda V del PEAT tonal de 500 Hz. con el umbral de disconfort de la frecuencia de 500 Hz. Participaron 30 sujetos seleccionados aleatoriamente a partir de un marco muestral de la carrera de fonoaudiología de la Universidad de Talca. Metodología se realizó un tamizaje auditivo que constó de otoscopia, Audiometria Tonal Liminar (ATL) y el LDL, posterior a esto se llevó a cabo el PEAT a una intensidad de estimulación supraumbral de 75 dB HL identificando la latencia de la onda V. Resultados y discusión: los resultados encontrados no son significativos, por lo que es necesario realizar nuevas investigaciones. Palabras claves: Potencial Evocado Auditivo de Troncoencéfalo, Umbral de Disconfort Auditivo, latencia. ABSTRACT/ The current investigation sought to determine which is the correlation between Loudness Discomfort Level (LDL) at frequencies of 500 Hz and latencies of wave V with tonal stimulation that delivers the Auditory Brainstem Evoked Responses (ABR) in normal hearing subjects. The objectives was to determine the latency of wave V and Relate latency wave V at 500 Hz with the LDL in the frequency of 500 Hz. The sample was composed by 30 subjects randomly selected from a sampling frame of speech pathology and audiology career at the University of Talca. Methodology: Auditory screening was performed that consisted of otoscopy, audiometry Liminar (ATL) and LDL, after this was done the PEAT a suprathreshold stimulation intensity of 75 dB HL to identify the latency of wave V. Results and discussion: the findings are not significant, so further research is needed. Keyword: Loudness Discomfort Level, Auditory Brainstem Evoked Responses, latency

    CA125-Guided Diuretic Treatment Versus Usual Care in Patients With Acute Heart Failure and Renal Dysfunction

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    Background: The optimal diuretic treatment strategy for patients with acute heart failure and renal dysfunction remains unclear. Plasma carbohydrate antigen 125 (CA125) is a surrogate of fluid overload and a potentially valuable tool for guiding decongestion therapy. The aim of this study was to determine if a CA125-guided diuretic strategy is superior to usual care in terms of short-term renal function in patients with acute heart failure and renal dysfunction at presentation. Methods: This multicenter, open-label study randomized 160 patients with acute heart failure and renal dysfunction into 2 groups (1:1). Loop diuretics doses were established according to CA125 levels in the CA125-guided group (n = 79) and in clinical evaluation in the usual-care group (n = 81). Changes in estimated glomerular filtration rate (eGFR) at 72 and 24 hours were the co-primary endpoints, respectively. Results: The mean age was 78 ± 8 years, the median amino-terminal pro-brain natriuretic peptide was 7765 pg/mL, and the mean eGFR was 33.7 ± 11.3 mL/min/1.73m2. Over 72 hours, the CA125-guided group received higher furosemide equivalent dose compared to usual care (P = 0.011), which translated into higher urine volume (P = 0.042). Moreover, patients in the active arm with CA125 >35 U/mL received the highest furosemide equivalent dose (P <0.001) and had higher diuresis (P = 0.013). At 72 hours, eGFR (mL/min/1.73m2) significantly improved in the CA125-guided group (37.5 vs 34.8, P = 0.036), with no significant changes at 24 hours (35.8 vs 39.5, P = 0.391). Conclusion: A CA125-guided diuretic strategy significantly improved eGFR and other renal function parameters at 72 hours in patients with acute heart failure and renal dysfunction

    Risk score for early risk prediction by cardiac magnetic resonance after acute myocardial infarction

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    [EN] Background: Cardiac magnetic resonance (CMR) performed early after ST-segment elevation myocardial infarction (STEMI) can improve major adverse cardiac event (MACE) risk prediction. We aimed to create a simple clinical-CMR risk score for early MACE risk stratification in STEMI patients. Methods: We performed a multicenter prospective registry of reperfused STEMI patients (n = 1118) in whom early (1-week) CMR-derived left ventricular ejection fraction (LVEF), infarct size and microvascular obstruction (MVO) were quantified. MACE was defined as a combined clinical endpoint of cardiovascular (CV) death, nonfatal myocardial infarction (NF-MI) or re-admission for acute decompensated heart failure (HF). Results: During a median follow-up of 5.52 [2.63-7.44] years, 216 first MACE (58 CV deaths, 71 NF-MI and 87 HF) were registered. Mean age was 59.3 +/- 12.3 years and most patients (82.8%) were male. Based on the four variables independently associated with MACE, we computed an 8-point risk score: time to reperfusion >4.15 h (1 point), GRACE risk score > 155 (3 points), CMR-LVEF 1.5 segments (1 point). This score permitted MACE risk stratification: MACE per 100 person-years was 1.96 in the low-risk category (0-2 points), 5.44 in the intermediate-risk category (3-5 points), and 19.7 in the high-risk category (6-8 points): p 4.15 h and GRACE risk score > 155) and CMR (LVEF 1.5 segments) variables allows for simple and straightforward MACE risk stratification early after STEMI. External validation should confirm the applicability of the risk score.This work was supported by the Instituto de Salud Carlos III and cofunded by Fondo Europeo de Desarrollo Regional (FEDER) (grants PI20/00637 and CIBERCV16/11/00486), "Marató TV3" [grant number 20153030-31-32], the Catalonian Society of Cardiology 2015, La Caixa Foundation [HR17-00527], and by Sociedad Española de Cardiología (grant SEC/FECINV-CLI 21/024). D.M. acknowledges financial support from the Conselleria d'Educació, Investigació, Cultura i Esport, Generalitat Valenciana (grants AEST/ 2019/037 and AEST/2020/029). J. G. acknowledges financial support from the Agencia Estatal de Investigación (grant FJC2020-043981-I / AEI/10.13039/501100011033).Marcos-Garcés, V.; Perez, N.; Gavara-Doñate, J.; Lopez-Lereu, MP.; Monmeneu, JV.; Rios-Navarro, C.; De Dios, E.... (2022). Risk score for early risk prediction by cardiac magnetic resonance after acute myocardial infarction. International Journal of Cardiology. 349:150-154. https://doi.org/10.1016/j.ijcard.2021.11.05015015434

    Head-to-Head Comparison of Three Vaccination Strategies Based on DNA and Raw Insect-Derived Recombinant Proteins against Leishmania

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    Parasitic diseases plague billions of people among the poorest, killing millions annually, and causing additional millions of disability-adjusted life years lost. Leishmaniases affect more than 12 million people, with over 350 million people at risk. There is an urgent need for efficacious and cheap vaccines and treatments against visceral leishmaniasis (VL), its most severe form. Several vaccination strategies have been proposed but to date no head-to-head comparison was undertaken to assess which is the best in a clinical model of the disease. We simultaneously assayed three vaccination strategies against VL in the hamster model, using KMPII, TRYP, LACK, and PAPLE22 vaccine candidate antigens. Four groups of hamsters were immunized using the following approaches: 1) raw extracts of baculovirus-infected Trichoplusia ni larvae expressing individually one of the four recombinant proteins (PROT); 2) naked pVAX1 plasmids carrying the four genes individually (DNA); 3) a heterologous prime-boost (HPB) strategy involving DNA followed by PROT (DNA-PROT); and 4) a Control including empty pVAX1 plasmid followed by raw extract of wild-type baculovirus-infected T. ni larvae. Hamsters were challenged with L. infantum promastigotes and maintained for 20 weeks. While PROT vaccine was not protective, DNA vaccination achieved protection in spleen. Only DNA-PROT vaccination induced significant NO production by macrophages, accompanied by a significant parasitological protection in spleen and blood. Thus, the DNA-PROT strategy elicits strong immune responses and high parasitological protection in the clinical model of VL, better than its corresponding naked DNA or protein versions. Furthermore, we show that naked DNA coupled with raw recombinant proteins produced in insect larvae biofactories -the cheapest way of producing DNA-PROT vaccines-is a practical and cost-effective way for potential "off the shelf" supplying vaccines at very low prices for the protection against leishmaniases, and possibly against other parasitic diseases affecting the poorest of the poor.Spanish GovernmentSpanish Government [AGL2008-00748, AGL2010-16678-GAN]Generalitat de Catalunya [2005 FI 01116]Generalitat de Cataluny

    Genomic diversity, linkage disequilibrium and selection signatures in European local pig breeds assessed with a high density SNP chip

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    Genetic characterization of local breeds is essential to preserve their genomic variability, to advance conservation policies and to contribute to their promotion and sustainability. Genomic diversity of twenty European local pig breeds and a small sample of Spanish wild pigs was assessed using high density SNP chips. A total of 992 DNA samples were analyzed with the GeneSeek Genomic Profiler (GGP) 70 K HD porcine genotyping chip. Genotype data was employed to compute genetic diversity, population differentiation and structure, genetic distances, linkage disequilibrium and effective population size. Our results point out several breeds, such as Turopolje, Apulo Calabrese, Casertana, Mora Romagnola and Lithuanian indigenous wattle, having the lowest genetic diversity, supported by low heterozygosity and very small effective population size, demonstrating the need of enhanced conservation strategies. Principal components analysis showed the clustering of the individuals of the same breed, with few breeds being clearly isolated from the rest. Several breeds were partially overlapped, suggesting genetic closeness, which was particularly marked in the case of Iberian and Alentejana breeds. Spanish wild boar was also narrowly related to other western populations, in agreement with recurrent admixture between wild and domestic animals. We also searched across the genome for loci under diversifying selection based on F-S(T) outlier tests. Candidate genes that may underlie differences in adaptation to specific environments and productive systems and phenotypic traits were detected in potentially selected genomic regions

    Comparison of seven prognostic tools to identify low-risk pulmonary embolism in patients aged <50 years

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    Safety of coronary revascularization deferral based on fractional flow reserve and instantaneous wave-free ratio in patients with chronic kidney disease

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    Background: The safety of revascularization deferral according to pressure wire examination in patients with chronic kidney disease (CKD) has not been fully established. Methods: From a retrospective cohort of 439 patients in whom revascularization was deferred after physiological assessment, we examined the incidence of patient-oriented composite endpoint (POCE: all-cause death, myocardial infarction [MI] and unplanned revascularization) in patients with CKD (estimated glomerular filtration rate [eGFR] &lt; 60 mL/min/1.73 m2) and without it. Results: At 4 years of follow-up, the primary endpoint was met by 25.0% of patients with CKD and by 14.4% of patients without CKD (hazard ratio [HR] 1.56, 95% confidence interval [CI] 0.96–2.53, p = 0.071). The incidence of POCE was even higher in patients with an eGFR &lt; 30 mL/min/1.73 m2: 43.8% (HR 3.10, 95% CI 1.08–8.92, p = 0.036). However, no differences were observed in the incidence of MI (4.2% vs. 4.4% in non-CKD), target vessel revascularization (5.8% vs. 5.9%), and target vessel MI (0.8% vs. 4.6%). Conclusions: Patients with CKD in whom pressure-wire evaluation led to deferral of coronary revascularization develop more POCE in the long term, compared to patients with normal renal function. However, the increase in POCE in patients with CKD was seldom related to deferred vessels, thus suggesting an epiphenomenon of an intrinsically higher cardiovascular risk of CKD patients
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