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Whispers in the Brain: Extracellular Vesicles in Neuropathology and the Diagnostic Al...
Melis Işık
Hatice Sarı

Melis Işık

and 4 more

September 24, 2024
Extracellular vesicles (EVs) have emerged as pivotal mediators in neurological diseases, showcasing multifaceted potential roles ranging from pathogenesis to diagnosis. These nano-sized membranous structures, released by various cell types including neurons, astrocytes, and microglia, encapsulate a diverse cargo of proteins, lipids, RNA species, and even DNA fragments. In neuropathology, EVs contribute significantly to intercellular communication within the central nervous system (CNS), influencing physiological or pathological cascades. Through the transfer of bioactive molecules, EVs modulate neuroinflammation, neuronal survival, synaptic plasticity, and the propagation of protein aggregates characteristic of neurodegenerative disorders. Moreover, their presence in biofluids such as cerebrospinal fluid (CSF), blood, and urine reflects the pathophysiological state of the CNS, offering a window into diagnosis, monitoring and treatment of neurological diseases. Recent advancements in EV isolation techniques, coupled with high-throughput omics technologies, have facilitated the profiling of EV cargo, enabling the identification of disease-specific biomarkers with high sensitivity and specificity. This review explores the intricate roles of EVs in neuropathology, highlighting their involvement in Alzheimer’s disease, Parkinson’s disease, Multiple Sclerosis, and other neurological disorders. Furthermore, it delves into the diagnostic potential of EVs, discussing current challenges and prospects in harnessing EV-derived biomarkers for precision medicine in neurology. Ultimately, understanding the biology of EVs in neurological contexts promises transformative insights into disease mechanisms and therapeutic strategies, paving the way for innovative diagnostic tools and targeted interventions in clinical practice.
Neurophysiological Investigation of Self-Generated and Externally Provided Reappraisa...
Connor Haggarty
Christine Rabinak

Connor Haggarty

and 1 more

September 24, 2024
Cognitive reappraisal, in which an individual alters the emotional meaning of a stimulus, is an effective emotion regulation strategy that can decrease an individual’s experience of negative emotion. This study sought to use the late positive potential (LPP), an event-related potential (ERP) component that has been shown to measure neural activity during emotional processing and regulation, to evaluate the effectiveness of different reappraisal strategies. The study’s aims were to compare self-generated reappraisal strategies, in which subjects were required to generate their own reappraisals, and externally provided reappraisals, in which descriptions that were negative or neutral were provided before viewing the image. Moreover, we looked at the sustained effects of these strategies on behavioral and brain measures of negative affect. Thirty-eight participants were shown images containing negative content while EEG data was recorded. Results revealed regulation effects on several early LPP components, with both types of reappraisals affecting amplitude for these peaks differently. Also, externally provided reappraisals led to larger passive task effects than self-generated reappraisal cues. Subjective responses showed a similar prolonged reduction in negative affect for both tasks despite pronounced differences in EEG activity. Externally provided reappraisals are more effective than self-generated ones, altering peak amplitudes and reducing the impact of negative images during passive viewing where these effects are not as distinct during the emotion regulation task. These findings have therapeutic implications, favoring guided regulation methods over self-reappraisal for sustained reappraisal effects.
Construction of Multi Solitons for the L 2 Supercritical Double Power Nonlinear Schr...
Mengxue Bai
chenglin Wang

Mengxue Bai

and 1 more

September 24, 2024
This paper deals with the double power nonlinear Schrodinger equation in one dimension, which is proposed as a model to describe the Bose-Einstein condensate with mixed state interactions. The equation admits unstable solitons in the L 2 supercritical case. In terms of Cote , Martel and Merle’s argument, multi solitons of the equation are constructed by using unstable solitons in the L 2 supercritical case, which extend Cote , Martel and Merle’s results from the pure power case to the double power nonlinear cases.
Dam-induced impacts on the water temperature of the Charef River (North East Algeria)
Omar Ramzi Ziouch
Naouel Dali

Omar Ramzi Ziouch

and 7 more

September 24, 2024
The Charef sub-watershed (1735 km 2, 200000 inhabitants) is part of the large Seybouse basin (North-east of Algeria). It contains several reservoirs, of which the Charef dam is the largest (157 10 6 m 3). The main objective of this work was to assess downstream thermal responses to the dam and examine the impacts of the water flow and the water residence time (WRT) on the variability in water downstream temperature. During the period January–December 2012, the hydrological parameters of the Charef dam’s waters varied greatly on a spatiotemporal scale. Salinity, EC, TDS, and water flow all respond similarly, with larger magnitudes in waters upstream of the dam than downstream, whatever the season. Moreover, salinity and EC have a significant positive correlation with temperature, but flow rate and precipitation have a negative one. Besides, TDS and temperature do not have a statistically significant relationship. In terms of flux, the Charef dam retains 59% and 56% of the incoming water and TDS fluxes, respectively. Furthermore, the temperature of the upstream waters is on average higher than that of the downstream in 83% of samples. During the dry season, the thermal response of the waters downstream of the Charef dam can exceed 2°C (downstream cooling). Despite being a small dam, the WRT (2.3 years) in the Charef dam has a significant impact on the downstream water temperature. These temperature changes downstream of dams may cause significant physicochemical and biological issues. This research applies to a critical issue in hydrology: the potential impact of dam-induced changes to water residence time and flow regimes on thermal dynamics, which in turn affect downstream ecosystems. Some restoration practices like increasing discharges during dry seasons could mitigate thermal impacts and minimize negative impacts. Also, riparian cover restoration could enhance riparian habitat, stabilize banks, and maintain cooler stream temperatures.
Unveiling Exceptional Peroxidase-like Activity in 4Fe-Ni-B Nanoparticles for Sensitiv...
sihua deng
Yingzhao Ma

sihua deng

and 4 more

September 24, 2024
Natural enzymes, while catalytically proficient, are often limited by their sensitivity to environmental conditions and the complexity of their extraction and storage. This has driven research towards the development of robust, cost-effective, and readily available enzyme mimics. Among these, transition metal borides have emerged as promising candidates, leveraging their unique electronic and catalytic properties to emulate enzymatic functions. In this study, we introduce the synthesis of amorphous metal boride nanoparticles through a facile chemical reduction method under chilled conditions. For the first time, these nanoparticles are demonstrated to possess intrinsic peroxidase-like activity, with the 4Fe-Ni-B variant exhibiting the highest activity among the samples tested. The density functional the-ory (DFT) revealed that the addition of nickel enhanced the response of 4Fe-Ni-B to hydrogen peroxide and a synergistic ef-fect between Ni2+ and Fe3+ ions, which facilitated the conversion of Fe3+ to Fe2+ and thus improved the catalytic efficiency. Expanding the utility of these nanozymes, We introduce a colorimetric sensor for swift H2O2 and GSH detection, showcasing the versatility of transition metal borides in analytical applications. This work advances binary metal borides as artificial enzymes and deepens the comprehension of nanozyme de-sign, paving the way for next-generation artificial enzymes with customized catalytic profiles.
Analytical solution of Black-Scholes Model for European Option Pricing via Reconstruc...
Astha Panchal
Anil Chavada

Astha Panchal

and 1 more

September 24, 2024
In this paper, we establish Reconstructed Variational Iteration Method (RVIM), in combination with the Laplace transform for the Black-Scholes option pricing model for the first time. We derive exact solutions for two types of BSM. The first equation is a transformed version of the classical BSM, while the second is a generalized BSM where volatility is modeled as a function of the underlying stock price. The solutions obtained through RVIM have been thoroughly validated against existing results in the literature, demonstrating strong agreement. Additionally, we provide 2-Dimensional and 3-Dimensional graphical representations of the solutions, offering further insights into their behavior. This study confirms the effectiveness of RVIM in solving both classical and generalized Black-Scholes equations.
Mitigating Reverse Preference Attacks in Large Language Models through Modality Fusio...
Yoshiki Nishikado

Yoshiki Nishikado

and 5 more

September 24, 2024
The growing sophistication of adversarial attacks targeting machine learning models has led to increasing concerns about the security and robustness of widely deployed systems. Modality fusion offers a novel defense mechanism that enhances the resilience of models against reverse preference attacks, a specific type of adversarial manipulation aimed at altering preference signals to subvert model performance. Through the integration of multiple data modalities, the Mistral LLM was equipped with the ability to process a richer, more complex set of features, effectively distributing the impact of adversarial interference across several input channels. Experiments demonstrated that this multi-modal approach not only improved accuracy but also significantly reduced performance degradation under high-intensity attack scenarios. The inclusion of attention mechanisms further enabled the model to dynamically prioritize information based on context, improving its adaptability and real-time performance under adversarial conditions. Although the modality fusion mechanism introduced a moderate increase in computational overhead, the corresponding improvements in robustness, particularly in mitigating the effects of reverse preference attacks, made it a highly effective solution for defending against adversarial threats. The findings emphasize the critical role that multi-modal processing can play in securing machine learning models against increasingly sophisticated attacks while maintaining performance.
Bilirrubinómetro, su Funcionamiento
Xavier Pardell Peña

Xavier Pardell Peña

September 24, 2024
En los recién nacidos, la acumulación excesiva de bilirrubina en la sangre puede provocar ictericia neonatal, una afección en la que la piel y los ojos del bebé adquieren un color amarillento. Esto ocurre porque el hígado del recién nacido no está completamente desarrollado para procesar la bilirrubina de manera eficaz. La ictericia debido a la descomposición acelerada de la hemoglobina y a una función hepática inmadura. La baja concentración de albúmina aumenta el riesgo de elevar los niveles de bilirrubina libre (no conjugada), lo que incrementa el riesgo de neurotoxicidad y puede llevar a la encefalopatía aguda por bilirrubina, también conocida como kernicterus.
Visual codon: A user-friendly Python program for viewing and optimizing gene GC conte...
Shiming Lin
Fei Xu

Shiming Lin

and 5 more

September 23, 2024
Due to the codon bias of different species, codon optimization is usually carried out in the process of heterologous protein expression. At present, there are a variety of codon optimization tools, however, the optimized sequences may still have high or low points of local GC content, which is not conducive to the primer design of gene subcloning, and also makes it difficult to perform the experiment of synthesizing the whole gene with DNA fragments by PCR reaction. In this study, we present a stand-alone software based on Python language, which can check and adjust the GC content of sequence-optimized genes. The software takes the codon frequency of Escherichia coli as a reference and provides a GUI interface, which allows users to change codons and intuitively see the effect of codon changes on local GC content. Our program brings convenience for the optimization of gene GC content and the subsequent gene cloning experiments.
Protein-RNA Docking Benchmark v3.0 integrated with Binding Affinity
Shri Kant
NITHIN C

Shri Kant

and 4 more

September 23, 2024
This study introduces a revised protein-RNA docking benchmark version 3.0 incorporating binding affinity data. A total of 173 unique RNA-binding domains, present in the RNA-binding proteins, are catalogued in this updated benchmark. A collection of 197 test cases has been curated from 288 unique protein-RNA complexes present in the Protein Data Bank. Among these, 27 cases are unbound-unbound (UU) type, where both the binding partners are in their unbound states, 160 are unbound-bound (UB) type where only the protein is in unbound state, and remaining 10 are bound-unbound (BU) type where only the RNA is in unbound state. The benchmark is categorized into three classes based on the conformational flexibility of the protein interface: 117 rigid-body (R) complexes with minimal structural changes, 41 semi-flexible (S) complexes showing moderate conformational changes and 29 full-flexible (X) complexes with significant conformational changes. The current benchmark represents a 62% increase in the number of test cases compared to its previous version. Moreover, experimentally determined binding affinity (K d) values are provided for 105 protein-RNA complexes, which is a subset of the docking benchmark. This updated dataset will facilitate the evaluation of both rigid-body and flexible docking methods as well as the methods that aim to predict the binding affinity. The updated benchmark is freely available at [http://www.csb.iitkgp.ac.in/applications/PRDBv3/PRDBv3.php](http://www.csb.iitkgp.ac.in/applications/PRDBv3/PRDBv3.php).
Sensory assessment of pressure-cooked and pureed pulses reveals similarities for chic...
Claire Chigwedere
Janitha Wanasundara

Claire Chigwedere

and 2 more

September 23, 2024
The dominance of pulses in plant-based protein foods necessitates an investigation into their organoleptic properties. Taste, aroma, flavor, and trigeminal attribute intensities of purees obtained from pressure-cooked black bean, chickpea, faba bean, green lentil, pinto bean, and yellow pea were assessed using a trained panel. All pulse purees had similar dry matter content and relatively similar particle size distribution profiles; thus, these factors would not influence the intensities of the sensory attributes. The pulse-like attribute was consistently rated highly across all the pulse purees. The black, pinto, and faba bean purees mostly exhibited similar characteristics whilst chickpea and yellow pea purees behaved similarly. For example, the dry beans and faba bean purees had higher intensities for the bitter, earthy, and metallic aromas and lower intensities for the green, floury/starchy, sweet, and nutty aromas than those for the chickpea and yellow pea purees. Interestingly, green lentil puree largely exhibited intensities that were typical of dry bean purees. Some attributes were perceived to be more intense when assessed as tastes than aromas or vice versa. The same was also observed for attributes that were assessed as both aroma and flavor. It was found that the sensitivity of the mode of perception on the perceived intensity of an attribute may depend on the type of pulse. The similarities in sensory profiles of the pulses can be useful to first, the food industry to expand on ingredients in formulations without drastic effects on the sensory quality and second, the consumers who are neophobic.
Seasonal Abundance and Habitat Use of Birds in the Savanna Region of Western Africa
Aisha Magaji
Safianu Rabiu

Aisha Magaji

and 1 more

September 23, 2024
A document by Aisha Magaji. Click on the document to view its contents.
Pleistocene climatic fluctuations and divergence with gene flow drive continent-wide...
Bridget Ogolowa
Alan Brelsford

Bridget Ogolowa

and 12 more

September 23, 2024
Diversification mechanisms in Sub-Saharan Africa have long attracted research interest with varying support for either allopatric or parapatric models of speciation. However, studies have seldom been performed across the entire continent, a scale which could elucidate the relative importance of allopatric and parapatric models of divergence. To shed light on continental-scale patterns of African biogeography and diversification, we investigated the historical demography of a bird with a continent-wide distribution in Sub-Saharan Africa, the Yellow-rumped Tinkerbird, Pogoniulus bilineatus. We sampled populations from across the continent and using genomic data, assessed genetic diversity, structure, and differentiation, reconstructed the phylogeny, and performed alternative demographic model selection between neighbouring clade pairs. We uncovered substantial genetic structure and differentiation patterns which corroborated the phylogenetic topology. Structure was chiefly influenced by the arid corridor, a postulated biogeographical barrier in Sub-Saharan Africa. Moreover, peak genetic diversities coincided with postulated refugial areas while demographic reconstructions between genetic lineages supported allopatric models consistent with the Pleistocene Forest Refuge hypothesis. However, within lineages, divergence with gene flow was supported. Continent-wide patterns of diversification involve an integration of both allopatric and parapatric mechanisms, with a role for both periods of divergence in isolation and across ecological gradients. Furthermore, our study emphasises the importance of the arid corridor as a primary biogeographical feature across which diversification occurs, yet one that has hitherto received scant attention regarding its importance in avian diversification in Sub-Saharan Africa.
Regulation of MareA gene on monascus growth and metabolism under different nitrogen s...
Zhuolan Li
Sicheng Zhang

Zhuolan Li

and 4 more

September 23, 2024
Monascus is a widely used natural microorganism in our country, which can produce useful secondary metabolites. Studies have shown that medium composition plays an important role in the primary and secondary metabolism of Monascus, especially the nitrogen source directly affects the growth, reproduction and secondary metabolites of Monascus. As a global transcriptional regulator of nitrogen metabolism, AreA gene is involved in the regulation of secondary metabolism. In this study, a MareA gene with high sequence homology to AreA gene was found by alignment analysis of the C100 genome. C100 knockout and overexpression mutants were obtained by Agrobacterium tumefaciens transformation. In this study, four nitrogen sources (Glutamine, Urea, NaNO 3, (NH 4) 2SO 4) were used to grow C100 and mutant strains. The yield of monascus rice under different nitrogen sources was compared by solid-state fermentation, and the types and yields of Mps produced were analyzed. HPLC and RT-qPCR were used to analyze the secondary metabolites of the three strains. Notably, growth differences between these monochorus strains were most pronounced when NaNO 3 medium was added. The fermentation product yield and gene expression level of the knockout strain were significantly lower than those of the C100 strain, while the opposite was observed for the overexpression strain. In conclusion, MareA gene had different regulatory effects on monochorus growth and metabolism under different nitrogen sources.
Original Article The Value of Flexible Bronchoscopy in the Diagnosis and Treatment of...
Omer Faruk Ipek
Ebru Yalcin

Omer Faruk Ipek

and 9 more

September 23, 2024
Introduction: The current literature lacks a comprehensive investigation into the use of flexible bronchoscopy (FB) in the treatment of childhood atelectasis. Methods: In this retrospective study, the data of pediatric patients who were diagnosed with atelectasis and underwent FB for diagnostic and therapeutic purposes in our center from January 1, 2017 to December 31, 2022 were retracted from medical records. The study aimed to assess the effectiveness of FB in diagnosing and treating atelectasis in children, identifying the appropriate patient population and the optimal timing for intervention. Results: A total of 108 children, with a median age of 4.9 years (14 days-18 years), underwent FB. At the time atelectasis was detected, at least one underlying disease was present in 62% of the patients. Based on the macroscopic and microscopic FB findings, 86.1% of the patients received a new diagnosis, and 83.3% of the patients were prescribed additional new treatments. At the last outpatient visit, complete resolution of the atelectasis was observed in 40.8% of patients, while 31.4% showed no resolution. The duration from the diagnosis of atelectasis to FB was shorter in patients with partial or complete resolution. Patients without additional radiological abnormalities or scoliosis had higher resolution rates, while those with congenital cardiac diseases, immunodeficiency, or primary ciliary dyskinesia had lower rates. Conclusion: Children with atelectasis who do not respond to conventional treatments within three weeks may undergo FB. Delayed FB contributes to failure in resolving atelectasis, prolonged recovery times, and increased recurrence rates, particularly in patients with underlying diseases.
Anatomical, scanning electron microscopic, and histological studies of the ocular lid...
fatma mahmoud
Ali   Gadel-Rab

fatma mahmoud

and 3 more

September 23, 2024
The present study aimed to describe the anatomical, scanning electron microscopic, and histological features of the ocular eyelids and muscles of the Egyptian agama, Trapelus mutabilis. The eye of the Egyptian agama is characterized by mobile upper and lower eyelids and a small, immobile, nictitating membrane. The upper eyelid appears shorter than the lower one, and the head skin above the upper eyelid extends laterally to form a superior extension. The scales of the eyelids are arranged in the same order and are equipped with micro-ornamentation and sense organs at their tips. In contrast, the histological structure of the upper eyelid is similar to that of the lower eyelid. The external surface of both eyelids is composed of keratinized stratified squamous epithelium of 2-4 cell layers, while cuboidal stratified epithelium lines their internal surface. Both eyelids contain iridophores and melanophores. The immobile nictitating membrane (third eyelid) appears as a small protrusion with a concave surface that connects with the lacrimal gland posteriorly at the anterior canthus of the eye. Its external surface is covered with stratified squamous epithelium, while its internal surface is lined by one or two layers with rounded nuclei attached to the conjunctival epithelium. Video recordings of eye movement in the laboratory revealed that the movement of the eyelid is synchronized with the eyeball movements, allowing all eye movements to be observed. The placement of the eye inside the skull, its protection by two eyelids equipped with hard scales and sensory organs, and the presence of a superior extension of broad scales acting as an umbrella for the eyes, in addition to the presence of two types of pigment cells, enhance eye protection against ultraviolet rays. All these characteristics are well-suited for the remote desert environment in which the agama lives.
A morphometric and stereological study: Morphometric measurements and calculation of...
G. Cakmak
V. Delibas

G. Cakmak

and 2 more

September 23, 2024
In this study, it was aimed to reveal the volume values of cervical segments in poultry. The total volume, substantia grisea and substantia alba volume values of each cervical segment of each animal were calculated using the Cavalieri’s Principle. Ten healthy adult female turkeys aged 8 months, and 10 healthy adult female guinea fowls, aged 8 months, were used. The animals were anesthetized and then perfused. Spinal cords were dissected. Length, weight and diameter measurements of each cervical segment were measured to obtain morphometric values. Each cervical segment was blocked with paraffin. Ten sections of 5 µm thickness were taken by a microtome, paralel and serial, with a step of 1/75 for each segment. The sections were stained with hematoxylin and eosin. The sections were photographed under a microscope with an objective x4. Shtereom I package program was used for volume calculations. This study revealed the presence of 13 cervical vertebrae and 14 cervical spinal segments in both turkey and guinea fowl. with this study, it was determined that the intumescentia cervicalis region in the turkey was between the eighth and the fourteenth cervical segments, and in the guinea fowl, between the nineteeth and the fourteenth cervical segments. With this study, the white matter, grey matter and total volume values of cervical spinal segments of turkey and guinea fowl were presented to the literature. Morphometric values of cervical segments were also calculated.
“COMPARISON OF SINGLE VS. MULTIPLE DOSES OF AMOXICILLIN/CLAVULANIC ACID FOR ANTIMICRO...
Sagir Muhammad
Bukar Mohammed

Sagir Muhammad

and 4 more

September 23, 2024
Objective To compare the efficacy of single dose antimicrobial prophylaxis with multiple doses for caesarean section at Federal Teaching Hospital Gombe. Design Parallel arm randomized controlled trial (1:1 allocation) comparing single and multiple dose antimicrobial prophylaxis for caesarean section. Setting Federal Teaching Hospital Gombe, Nigeria. Population 176 women undergoing elective and emergency caesarean sections. Methods Participants were randomized into two groups: single dose of intravenous Amoxicillin/Clavulanic acid before skin incision only (Group A) and multiple doses including postoperative doses (Group B). Main Outcome Measures Surgical site infection rate during a 30-day surveillance period. Results The surgical site infection rate was 2.3% in Group A and 0.0% in Group B (p = 0.058). Febrile morbidity was 1.2% and 2.3% respectively (p = 0.509). Urinary tract infection occurred in one patient in Group A (p = 0.494). Conclusions Single dose antimicrobial prophylaxis for caesarean section is as effective as multiple doses in preventing surgical site infection. This trial was registered in the Pan African Clinical Trial Registry ([www.pactr.org](http://www.pactr.org) ) database with unique identification number PACTR202009483150226.
Phantom limb pain was successfully treated by repetitive transcranial magnetic stimul...
Jun Chen
Chen Xun

Jun Chen

and 5 more

September 23, 2024
Phantom limb pain was successfully treated by repetitive transcranial magnetic stimulation of the motor cortex and the amputation stump at different frequencies: a case report
Socket-Shield Technique and CGF for Implant Placement in the Esthetic Zone: A Two-Yea...
Shiwei Che
Noor Huda Ismail

Shiwei Che

and 3 more

September 23, 2024
Title: Socket-Shield Technique and CGF for Implant Placement in the Esthetic Zone: A Two-Year Case ReportShiwei Che1,2, Noor Huda Ismail3, Melissa Wan Yun Ooi1, Raja Azman Awang41 Department of Prosthodontics, School of Dental Sciences, Health Campus, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia. che.shiwei@student.usm.my; owymelissa@student.usm.my2 Dr. Che Dental Clinic, Luzhou City, China. 18982452422@163.com3 Department of Prosthodontics, School of Dental Sciences, Health Campus, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia. noorhuda@usm.my4 Department of Periodontics, School of Dental Sciences, Health Campus, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia. rjazman@usm.my
An irregular supraventricular tachycardia with the earliest atrial activation at the...
Atsushi Doi
Kazuya Sugioka

Atsushi Doi

and 7 more

September 23, 2024
A 57-year-old woman with frequent palpitations was referred for radiofrequency ablation. The baseline 12-lead electrocardiogram and echocardiography were normal. The baseline atrio-His (AH) and His-ventricular (HV) intervals were 70 and 35 ms, respectively. Dual atrioventricular (AV) nodal physiology was not observed during programmed atrial stimulation. Ventriculoatrial conduction showed a decremental and concentric pattern, with the earliest atrial activation recorded in the His bundle region. There was no evidence of a jump-up phenomenon during programmed ventricular stimulation. Supraventricular tachycardia (SVT) with variable AH and His-atrial (HA) intervals was induced by extra atrial stimulation without any jump-up in the AH interval. The earliest atrial activation during SVT was recorded at the coronary sinus (CS) 7,8 region, corresponding to the CS ostium, which differed from the atrial activation sequence during ventricular pacing. The atrial-atrial (AA) intervals demonstrated variability exceeding 50 ms without any alteration in the atrial activation sequence (Figure 1A). Ventricular entrainment pacing was performed during SVT (Figure 1B). Transient 2:1 AV conduction was observed during SVT (Figure 1C). Based on these findings, what is the underlying mechanism of the tachycardia?
Cardiac Resynchronization Therapy Optimization by Targeting Papillary Muscle Dyssynch...
Ryosuke Tani
Takahisa Noma

Ryosuke Tani

and 9 more

September 23, 2024
Introduction: Cardiac resynchronization therapy (CRT) is an established treatment to improve left ventricular function in patients with heart failure with reduced ejection fraction, especially complete left branch block. However, the problem of non-response remains, and there is controversy regarding the best pacing site. Methods and Results: A 44-year-old patient with dilated cardiomyopathy underwent CRT. The epicardial polarity change site was paced and functional mitral regurgitation improved markedly owing to the synchrony of the papillary muscles compared with the other pacing site. Conclusion: Our findings suggest that this can be a new optimal left ventricular pacing site, considering the electrophysiological characteristics.
Adherence to 6-Mercaptopurine (6-MP), Habit Strength, and Health-related Quality of L...
Yang MM
Revika Singh

Yang MM

and 9 more

September 23, 2024
Background: Low 6-mercaptopurine (6-MP) adherence (<95%) is associated with increased relapse in pediatric acute lymphoblastic leukemia (ALL). Stronger habit has been associated with higher adherence. Our objective was to examine the relationship of 6-MP adherence to habit strength and health-related quality of life (HRQOL) in children with ALL. Methods: A single-center, cross-sectional study of 52 participants: 11 patients (mean age 16±4, 45% Female) and 41 parents/caregivers (age 37±5, 80% Female). Participants completed Visual Analogue Scale (VAS dose), Patient Reported Outcomes Measurement Information System (PROMIS) Medication Adherence Scale (PMAS), Self-Regulated Habit Index (SRHI), and PROMIS HRQoL measures. Descriptive statistics and spearman’s rho correlations were used. Eleven semi-structured interviews of participants were conducted and analyzed using Grounded Theory and thematic analysis. Results: Overall, 81% (42/52) of participants reported high 6-MP adherence (VAS dose ≥95%): patients 91% (10/11) and parents 78% (32/41). Higher adherence was correlated with better peer relationship scores (r s=0.34, P=0.03). No significant correlation was found between adherence and habit strength. Reported facilitators for higher 6-MP included reminders, care team communications, developing personalized tools, experience with medication administration, self-efficacy, and access to social support. On the other hand, financial burden, scheduling conflicts, and medication access were common barriers cited by participants. Conclusions: One-fifth of participants reported low 6-MP adherence, and habit strength wasn’t associated with adherence rates. Variability of 6-MP routines over treatment may prohibit automaticity. Behavioral interventions aimed at promoting habit formation could address barriers to 6-MP adherence and improve health outcomes in pediatric ALL.
Biochemical profile associated with Corona Virus-19(COVID-19) mortality: Findings fro...
Dipendra Kandel
Nuwadatta Subedi

Dipendra Kandel

and 7 more

September 23, 2024
Background: The clinical presentation of COVID-19 varies widely, ranging from asymptomatic cases to multisystemic failures, driving the scientific community to explore biochemical markers that could aid in early diagnosis, management, and the prevention of possible complications. Objective: This study is focused on identifying any significant trends or patterns in the demographic and biochemical characteristics of the deceased individuals, providing valuable insights into the factors that contribute to COVID-19-related deaths. Methodology: A cross-sectional research study was conducted at a tertiary care facility, involving 121 COVID-19 deaths that were recorded at the hospital between June 12, 2020, and May 22, 2021. The data were collected using a structured proforma to record demographic parameters such as age, sex, and number of days from symptom onset to death, as well as biochemical markers and analyzed using SPSS version 26.0. Result: Among the 121 deceased individuals, 76 (62.8%) were male, with a mean age of 60.14±14.87 years. The average duration from symptom onset to death was 10.76±6.73 days. The majority of the sample had high levels of D-dimer 73(82.02%), CRP 81(95.29%) and ferritin levels 83(95.40%). Additionally, a high neutrophil count was found in 69(65.71%), while 47(44.76%) exhibited a low lymphocyte count. Conclusion: Elevated levels of D-dimer, CRP, and other plasma markers have been found to poor outcomes in COVID-19 patients, indicating the importance of monitoring these parameters in clinical practice Early detection and intervention through a combination of demographic, biochemical, clinical, and radiological indicators can help prevent the worst outcomes and improve patient outcomes.
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