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https://www.readbyqxmd.com/read/29030380/association-between-qt-interval-components-and-sudden-cardiac-death-the-aric-study-atherosclerosis-risk-in-communities
#1
Wesley T O'Neal, Matthew J Singleton, Jason D Roberts, Larisa G Tereshchenko, Nona Sotoodehnia, Lin Y Chen, Gregory M Marcus, Elsayed Z Soliman
BACKGROUND: Several reports have demonstrated that prolongation of the QT interval is associated with sudden cardiac death (SCD). However, it is unknown whether any of the components within the QT interval are responsible for its association with SCD. METHODS AND RESULTS: We examined the association of the individual QT-interval components (R-wave onset to R-peak, R-peak to R-wave end, ST-segment, T-wave onset to T-peak, and T-peak to T-wave end) with SCD in 12 241 participants (54±5...
October 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/29020454/the-absence-of-brain-specific-link-protein-bral2-in-perineuronal-nets-hampers-auditory-temporal-resolution-and-neural-adaptation-in-mice
#2
J Popelář, M Díaz Gómez, J Lindovský, N Rybalko, J Burianová, T Oohashi, J Syka
Brain-specific link protein Bral2 represents a substantial component of perineuronal nets (PNNs) enwrapping neurons in the central nervous system. To elucidate the role of Bral2 in auditory signal processing, the hearing function in knockout Bral2(-/-) (KO) mice was investigated using behavioral and electrophysiological methods and compared with wild type Bral2(+/+) (WT) mice. The amplitudes of the acoustic startle reflex (ASR) and the efficiency of the prepulse inhibition of ASR (PPI of ASR), produced by prepulse noise stimulus or gap in continuous noise, was similar in 2-week-old WT and KO mice...
October 11, 2017: Physiological Research
https://www.readbyqxmd.com/read/29020031/sudden-cardiac-death-and-pump-failure-death-prediction-in-chronic-heart-failure-by-combining-ecg-and-clinical-markers-in-an-integrated-risk-model
#3
Julia Ramírez, Michele Orini, Ana Mincholé, Violeta Monasterio, Iwona Cygankiewicz, Antonio Bayés de Luna, Juan Pablo Martínez, Pablo Laguna, Esther Pueyo
BACKGROUND: Sudden cardiac death (SCD) and pump failure death (PFD) are common endpoints in chronic heart failure (CHF) patients, but prevention strategies are different. Currently used tools to specifically predict these endpoints are limited. We developed risk models to specifically assess SCD and PFD risk in CHF by combining ECG markers and clinical variables. METHODS: The relation of clinical and ECG markers with SCD and PFD risk was assessed in 597 patients enrolled in the MUSIC (MUerte Súbita en Insuficiencia Cardiaca) study...
2017: PloS One
https://www.readbyqxmd.com/read/29019647/126%C3%A2-264-assigned-chemical-formulas-from-an-atmospheric-pressure-photoionization-9-4-t-fourier-transform-positive-ion-cyclotron-resonance-mass-spectrum
#4
Logan C Krajewski, Ryan P Rodgers, Alan G Marshall
Here, we present atmospheric pressure photoionization (APPI) Fourier transform ion cyclotron resonance (FTICR) mass analysis of a volcanic asphalt sample by acquiring data for 20 Da wide mass segments across a 1000 Da range, stitched into a single composite mass spectrum, and compare to a broad-band mass spectrum for the same sample. The segmented spectrum contained 170 000 peaks with magnitude greater than 6σ of the root-mean-square (rms) baseline noise, for which 126 264 unique elemental compositions could be assigned...
October 11, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29016604/novel-fine-scale-aerial-mapping-approach-quantifies-grassland-weed-cover-dynamics-and-response-to-management
#5
Carolyn M Malmstrom, H Scott Butterfield, Laura Planck, Christopher W Long, Valerie T Eviner
Invasive weeds threaten the biodiversity and forage productivity of grasslands worldwide. However, management of these weeds is constrained by the practical difficulty of detecting small-scale infestations across large landscapes and by limits in understanding of landscape-scale invasion dynamics, including mechanisms that enable patches to expand, contract, or remain stable. While high-end hyperspectral remote sensing systems can effectively map vegetation cover, these systems are currently too costly and limited in availability for most land managers...
2017: PloS One
https://www.readbyqxmd.com/read/28977353/incremental-value-of-right-heart-metrics-and-exercise-performance-to-well-validated-risk-scores-in-dilated-cardiomyopathy
#6
Kegan J Moneghetti, Genevieve Giraldeau, Matthew T Wheeler, Yukari Kobayashi, Bojan Vrtovec, David Boulate, Tatiana Kuznetsova, Ingela Schnittger, Joseph C Wu, Jonathan Myers, Euan Ashley, Francois Haddad
Aims: Risk stratification in heart failure (HF) relies on several established clinical risk scores, however, myocardial deformation, right heart metrics, and exercise performance have not usually been considered. This study sought to assess the incremental value of advanced echocardiographic and cardiopulmonary exercise testing (CPX) parameters to validated risk scores in HF. Methods and results: The Meta-Analysis Global Group in Chronic Heart Failure (MAGGIC) and Metabolic Exercise Test Data Combined with Cardiac and Kidney Indexes (MECKI) scores were applied to 208 ambulatory patients with dilated cardiomyopathy (DCM) who completed echocardiography in conjunction with CPX as part of the Stanford Exercise Testing registry...
July 21, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28965260/the-t-peak-to-t-end-interval-a-novel-ecg-marker-for-ventricular-arrhythmia-and-appropriate-icd-therapy-in-patients-with-hypertrophic-cardiomyopathy
#7
Leon Dinshaw, Julia Münch, Jannis Dickow, Susanne Lezius, Stephan Willems, Boris A Hoffmann, Monica Patten
INTRODUCTION: Hypertrophic cardiomyopathy (HCM) is associated with an increased risk of sudden cardiac death (SCD) primarily due to ventricular arrhythmia (VA). In patients (pts.) with a high risk of SCD, the implantation of an intracardiac cardioverter defibrillator (ICD) is thus indicated. Previous studies suggest that a prolonged interval between the peak and the end of the T wave, T-peak to T-end (TpTe), is associated with an elevated risk of VA and SCD in various clinical settings...
September 30, 2017: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/28963597/osteopontin-gene-polymorphism-association-with-milk-traits-and-its-expression-analysis-in-milk-of-riverine-buffalo
#8
Sidra Manzoor, Asif Nadeem, Javed Maryam, Abu Saeed Hashmi, Muhammad Imran, Masroor Ellahi Babar
Osteopontin gene is regarded as a plausible candidate in mammary gland differentiation and development, expressed by variety of cells, tissues, and biological fluids including milk. The current study was performed in two phases. In the first phase, Osteopontin gene polymorphisms were identified and associated with milk composition such as ash, milk fat, SNF, lactose, and protein. In the second phase, milk samples from five healthy mastitis-free Nili Ravi buffaloes were analyzed for expression of Osteopontin gene at transition (day 15), mid (day 90), and end (day 250) stage of their second lactation...
September 30, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28963524/global-nickel-anomaly-links-siberian-traps-eruptions-and-the-latest-permian-mass-extinction
#9
Michael R Rampino, Sedelia Rodriguez, Eva Baransky, Yue Cai
Anomalous peaks of nickel abundance have been reported in Permian-Triassic boundary sections in China, Israel, Eastern Europe, Spitzbergen, and the Austrian Carnic Alps. New solution ICP-MS results of enhanced nickel from P-T boundary sections in Hungary, Japan, and Spiti, India suggest that the nickel anomalies at the end of the Permian were a worldwide phenomenon. We propose that the source of the nickel anomalies at the P-T boundary were Ni-rich volatiles released by the Siberian volcanism, and by coeval Ni-rich magma intrusions...
September 29, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28953669/ultrasonic-monitoring-in-the-assessment-of-pulmonary-recruitment-and-the-best-positive-end-expiratory-pressure
#10
RANDOMIZED CONTROLLED TRIAL
Ke-Qiang Tang, Shao-Ling Yang, Bin Zhang, Hong-Xiang Liu, Dong-Ying Ye, Hong-Ze Zhang, Shuang Ma
The aim of this study was to explore the clinical value of ultrasonic monitoring in the assessment of pulmonary recruitment and the best positive end-expiratory pressure (PEEP).Between January 2015 and June 2017, 40 patients with acute respiratory distress syndrome in our hospital were randomly divided into 2 groups: ultrasound group (ULS group; n = 20) and oxygenation group (OXY group; n = 20). The PEEP incremental method was used to perform recruitment maneuvers. Ultrasound scoring and the oxygenation method were used to evaluate the pulmonary recruitment endpoint...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28945599/abi-base-recall-automatic-correction-and-ends-trimming-of-dna-sequences
#11
Zakaria Elyazghi, Loubna El Yazouli, Khalid Sadki, Fouzia Radouani
Automated DNA sequencers produce chromatogram files in ABI Format. When viewing chromatograms, some ambiguities are shown at various sites along the DNA sequences, because the program implemented in the sequencing machine and used to call bases cannot always precisely determine the right nucleotide, especially when it is represented by either a broad peak or a set of overlaying peaks. In such cases, a letter other than A, C, G, or T is recorded, most commonly N. Thus, DNA sequencing chromatograms needs manual examination: checking for mis-calls and truncate the sequence when errors become too frequent...
September 20, 2017: IEEE Transactions on Nanobioscience
https://www.readbyqxmd.com/read/28939425/kinematic-analysis-of-a-drinking-task-in-chronic-hemiparetic-patients-using-features-analysis-and-statistical-parametric-mapping
#12
Gabriela Lopes Santos, Thiago Luiz Russo, Angela Nieuwenhuys, Davide Monari, Kaat Desloovere
OBJECTIVE: To compare sitting posture and movement strategies between chronic hemiparetic and healthy subjects while performing a drinking task using Statistical Parametric Mapping (SPM) and feature analysis. DESIGN: Cross-sectional study. SETTING: Department of Physical Therapy of University. PARTICIPANTS: Thirteen chronic hemiparetic and thirteen healthy individuals matched for gender and age. INTERVENTION: Not applicable...
September 19, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28926488/potential-acceptability-of-a-pediatric-ventilator-management-computer-protocol
#13
Katherine A Sward, Christopher J L Newth, Robinder G Khemani, Kent Page, Kathleen L Meert, Joseph A Carcillo, Thomas P Shanley, Frank W Moler, Murray M Pollack, Heidi J Dalton, David L Wessel, John T Berger, Robert A Berg, Rick E Harrison, Allan Doctor, J Michael Dean, Richard Holobkov, Tammara L Jenkins, Carol E Nicholson
OBJECTIVES: To examine issues regarding the granularity (size/scale) and potential acceptability of recommendations in a ventilator management protocol for children with pediatric acute respiratory distress syndrome. DESIGN: Survey/questionnaire. SETTING: The eight PICUs in the Collaborative Pediatric Critical Care Research Network. PARTICIPANTS: One hundred twenty-two physicians (attendings and fellows). INTERVENTIONS: None...
September 16, 2017: Pediatric Critical Care Medicine
https://www.readbyqxmd.com/read/28921906/outcomes-of-severe-uveitic-glaucoma-treated-with-baerveldt-implant-can-blindness-be-prevented
#14
Annelie N Tan, Michiel F Cornelissen, Carroll A B Webers, Roel J Erckens, Tos T J M Berendschot, Henny J M Beckers
PURPOSE: To evaluate long-term outcomes on efficacy and safety of severe uveitic glaucoma treated with a Baerveldt glaucoma implant (BGI). METHODS: A retrospective study of 47 eyes of 47 patients with uveitic glaucoma treated by a BGI between September 2002 and September 2015. Main outcome measures were intraocular pressure (IOP), number of glaucoma medications, course of the uveitis, visual acuity (VA) and complications. RESULTS: Mean IOP dropped from 30...
September 18, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/28912074/heart-rate-dependency-of-jt-interval-sections
#15
Katerina Hnatkova, Lars Johannesen, Jose Vicente, Marek Malik
BACKGROUND: Little experience exists with the heart rate correction of J-Tpeak and Tpeak-Tend intervals. METHODS: In a population of 176 female and 176 male healthy subjects aged 32.3±9.8 and 33.1±8.4years, respectively, curve-linear and linear relationship to heart rate was investigated for different sections of the JT interval defined by the proportions of the area under the vector magnitude of the reconstructed 3D vectorcardiographic loop. RESULTS: The duration of the JT sub-section between approximately just before the T peak and almost the T end was found heart rate independent...
August 9, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28905070/sodium-cationized-carbohydrate-gas-phase-fragmentation-chemistry-influence-of-glycosidic-linkage-position
#16
Jordan M Rabus, Maha T Abutokaikah, Reginald T Ross, Benjamin J Bythell
We investigate the gas-phase structures and fragmentation chemistry of two isomeric sodium-cationized carbohydrates using combined tandem mass spectrometry, hydrogen/deuterium exchange experiments, and computational methods. Our model systems are the glucose-based disaccharide analytes cellobiose (β-d-glucopyranosyl-(1 → 4)-d-glucose) and gentiobiose (β-d-glucopyranosyl-(1 → 6)-d-glucose). These analytes show substantially different tandem mass spectra. We characterize the rate-determining barriers to both the glycosidic and structurally-informative cross-ring bond cleavages...
September 27, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28887263/changes-in-geometry-and-cardiac-deformation-of-the-thoracic-aorta-after-thoracic-endovascular-aortic-repair-tevar
#17
Kelsey Hirotsu, Ga-Young Suh, Jason T Lee, Michael D Dake, Dominik Fleischmann, Christopher P Cheng
BACKGROUND: TEVAR has dramatically expanded treatment options for patients with thoracic aortic pathology. The interaction between endografts and the dynamic anatomy of the thoracic aorta is not well characterized for repetitive physiologic stressors and subsequent issues related to long-term durability. Through 3D modeling we sought to quantify cardiac-induced aortic deformation before and after TEVAR to assess the impact of endografts on dynamic aortic anatomy. METHODS: Eight patients with acute (n = 4) or chronic (n = 3) Type B dissections, or chronic arch aneurysm (n = 1), underwent TEVAR with a single (n = 5) or multiple (n = 3) Gore C-TAG(s)...
September 5, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28832173/-radiation-necrosis-in-the-upper-cervical-spinal-cord-in-a-patient-treated-with-proton-therapy-after-radical-resection-of-the-fourth-ventricle-ependymoma
#18
J Mraček, J Mork, T Svoboda, J Ferda, V Přibáň
BACKGROUND: Radiation necrosis in eloquent areas of the central nervous system (CNS) is one of the most serious forms of toxicity from radiation therapy. The occurrence of radiation necrosis in the CNS is described in a wide range of 3 months to 13 years after radiation therapy. The incidence of this complication covers a wide range of 3-47%. The potential advantage of proton therapy is the ability to reduce dose to normal tissue and escalate tumor dose. Proton beams enter and pass through the tissue with minimal dose deposition until they reach the end of their paths, where the peak of dose, known as the Bragg peak, occurs...
2017: Klinická Onkologie: Casopis Ceské a Slovenské Onkologické Spolecnosti
https://www.readbyqxmd.com/read/28827165/reproducibility-of-task-activation-using-the-addenbrooke-s-cognitive-examination-in-healthy-controls-a-functional-transcranial-doppler-ultrasonography-study
#19
L Beishon, C A L Williams, R B Panerai, T G Robinson, V J Haunton
INTRODUCTION: Cerebral blood flow velocity (CBFv) changes occurring with cognitive stimulation can be measured by Transcranial Doppler ultrasonography (TCD). The aim of this study was to assess the reproducibility of CBFv changes to the Addenbrooke's cognitive examination (ACE-III). NEW METHOD: 13 volunteers underwent bilateral TCD (middle cerebral artery), continuous heart rate (HR, 3-lead ECG, Finometer), beat-to-beat mean arterial pressure (MAP, Finometer), and end-tidal CO2 (ETCO2, capnography)...
November 1, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28817146/controlled-deposition-of-palladium-nanodendrites-on-the-tips-of-gold-nanorods-and-their-enhanced-catalytic-activity
#20
Gaoxing Su, Huaqiao Jiang, Hongyan Zhu, Jing-Jing Lv, Guohai Yang, Bing Yan, Jun-Jie Zhu
Plasmonic Au-Pd nanostructures have drawn significant attention for use in heterogeneous catalysis. In this study, palladium nanodendrite-tipped gold nanorods (PdND-T-AuNRs) were subjected to a facile fabrication under mild reaction conditions. The palladium amounts on the two tips were tunable. In the preparation of PdND-T-AuNRs, dense capped AuNRs, a low reaction temperature, and suitable stabilizing agents were identified as critical reaction parameters for controlling palladium nanodendrites deposited on both ends of AuNRs...
August 31, 2017: Nanoscale
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