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https://www.readbyqxmd.com/read/28528501/salicylic-acid-determination-in-estuarine-and-riverine-waters-using-hollow-fiber-liquid-phase-microextraction-and-capillary-zone-electrophoresis
#1
Gilmar Silvério da Silva, Diana L D Lima, Valdemar Inocêncio Esteves
A low-cost methodology using hollow fiber liquid-phase microextraction (HF-LPME) and capillary zone electrophoresis (CZE) with UV-Vis detector was developed to analyze the salicylic acid (SA) in estuarine and riverine waters. The technique is easy-to-use and rapid, and demands little volume of organic solvent. The extraction was carried out using a polypropylene membrane supporting into octan-1-ol. HF-LPME under optimized conditions (donor solution sample pH 2, acceptor solution pH 14, sample volume 25 mL, fiber length 10 cm, acceptor volume 25 μL, extraction time 3 h and stirring speed 350 rpm) presented high enrichment factor (407 times) and good recovery in real water samples (from 88 to 110%)...
May 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28528244/heart-rate-variability-of-chronic-posttraumatic-stress-disorder-in-the-korean-veterans
#2
Joo Eon Park, Ji Yeon Lee, Suk-Hoon Kang, Jin Hee Choi, Tae Yong Kim, Hyung Seok So, In-Young Yoon
Patients with post-traumatic stress disorder (PTSD) have lower heart rate variability (HRV) than the general population, but findings in this area have been inconsistent. This study was conducted to investigate the characteristics of HRV in patients with PTSD and to evaluate associations between PTSD symptoms and HRV indices. Sixty-eight patients with PTSD and 73 controls without PTSD were evaluated. HRV was measured in all subjects after they completed self-reported questionnaires. Patients with PTSD had significantly more depressed moods, anxiety, and poorer sleep quality than individuals in the non-PTSD group...
May 9, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28527844/evaluation-of-various-pretreatments-to-fiber-post-on-the-push-out-bond-strength-of-root-canal-dentin
#3
Ömer Kırmalı, Özlem Üstün, Alper Kapdan, Alper Kuştarcı
INTRODUCTION: The aim of this in vitro study was to compare the effect of different pretreatments (fiber post) with the laser-activated irrigation (LAI) technique (for removal of the smear layer) on root canal dentin in terms of push-out bond strength (PBS) in a fiber post. METHODS: Fifty freshly extracted mandibular single-rooted premolars were prepared, and LAI was applied to all roots (17% EDTA was 5 mL for 120 seconds with an erbium, chromium:yttrium-scandium-gallium-garnet laser [0...
May 17, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28527834/perceptions-of-seniors-with-heart-failure-regarding-autonomous-zero-effort-monitoring-of-physiological-parameters-in-the-smart-home-environment
#4
Sherry L Grace, Golnoush Taherzadeh, Isaac Sung Jae Chang, Jennifer Boger, Amaya Arcelus, Susanna Mak, Caroline Chessex, Alex Mihailidis
BACKGROUND: Technological advances are leading to the ability to autonomously monitor patient's health status in their own homes, to enable aging-in-place. OBJECTIVES: To understand the perceptions of seniors with heart failure (HF) regarding smart-home systems to monitor their physiological parameters. METHODS: In this qualitative study, HF outpatients were invited to a smart-home lab, where they completed a sequence of activities, during which the capacity of 5 autonomous sensing modalities was compared to gold standard measures...
May 17, 2017: Heart & Lung: the Journal of Critical Care
https://www.readbyqxmd.com/read/28527832/-we-are-all-there-for-the-same-purpose-support-for-an-integrated-community-exercise-program-for-older-adults-with-hf-and-copd
#5
Laura Desveaux, Samantha Harrison, Annemarie Lee, Sunita Mathur, Roger Goldstein, Dina Brooks
BACKGROUND: Despite well-established improvements following rehabilitation, functional gains often diminish following discharge. OBJECTIVE: To explore the attitudes of older adults with HF and COPD, who have completed rehabilitation, toward community-based exercise maintenance. METHODS: Semi-structured interviews were conducted with 11 individuals with HF or COPD. RESULTS: Deductive thematic analysis uncovered three themes: 1) transitioning to community exercise is challenging, highlighting participants' struggle with unstructured maintenance and a lack of appropriate programs; 2) a structured, group-based program tailored to functional ability facilitates adherence, describing participants views on the importance of routine, and accountability; and 3) "We are all there for the same purpose" - participant support for integrated exercise, including the benefit of multiple perspectives and sustainability...
May 17, 2017: Heart & Lung: the Journal of Critical Care
https://www.readbyqxmd.com/read/28527014/high-frequency-heart-rate-variability-reactivity-and-trait-worry-interact-to-predict-the-development-of-sleep-disturbances-in-response-to-a-naturalistic-stressor
#6
Sasha MacNeil, Sonya S Deschênes, Warren Caldwell, Melanie Brouillard, Thien-Thanh Dang-Vu, Jean-Philippe Gouin
BACKGROUND: High-frequency heart rate variability (HF-HRV) reactivity was proposed as a vulnerability factor for stress-induced sleep disturbances. Its effect may be amplified among individuals with high trait worry or sleep reactivity. PURPOSE: This study evaluated whether HF-HRV reactivity to a worry induction, sleep reactivity, and trait worry predict increases in sleep disturbances in response to academic stress, a naturalistic stressor. METHOD: A longitudinal study following 102 undergraduate students during an academic semester with well-defined periods of lower and higher academic stress was conducted...
May 19, 2017: Annals of Behavioral Medicine: a Publication of the Society of Behavioral Medicine
https://www.readbyqxmd.com/read/28526830/computationally-driven-engineering-of-sublattice-ordering-in-a-hexagonal-alhfsctizr-high-entropy-alloy
#7
Lukasz Rogal, Piotr Bobrowski, Fritz Körmann, Sergiy Divinski, Frank Stein, Blazej Grabowski
Multi-principle element alloys have enormous potential, but their exploration suffers from the tremendously large range of configurations. In the last decade such alloys have been designed with a focus on random solid solutions. Here we apply an experimentally verified, combined thermodynamic and first-principles design strategy to reverse the traditional approach and to generate a new type of hcp Al-Hf-Sc-Ti-Zr high entropy alloy with a hitherto unique structure. A phase diagram analysis narrows down the large compositional space to a well-defined set of candidates...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28526353/stretch-activated-two-pore-domain-k2p-potassium-channels-in-the-heart-focus-on-atrial-fibrillation-and-heart-failure
#8
REVIEW
Constanze Schmidt, Felix Wiedmann, Stefan M Kallenberger, Antonius Ratte, Jan S Schulte, Beatrix Scholz, Frank Ulrich Müller, Niels Voigt, Maria-Patapia Zafeiriou, Joachim R Ehrlich, Ursula Tochtermann, Gábor Veres, Arjang Ruhparwar, Matthias Karck, Hugo A Katus, Dierk Thomas
Two-pore-domain potassium (K2P) channels modulate cellular excitability. The significance of stretch-activated cardiac K2P channels (K2P2.1, TREK-1, KCNK2; K2P4.1, TRAAK, KCNK4; K2P10.1, TREK-2, KCNK10) in heart disease has not been elucidated in detail. The aim of this work was to assess expression and remodeling of mechanosensitive K2P channels in atrial fibrillation (AF) and heart failure (HF) patients in comparison to murine models. Cardiac K2P channel levels were quantified in atrial (A) and ventricular (V) tissue obtained from patients undergoing open heart surgery...
May 16, 2017: Progress in Biophysics and Molecular Biology
https://www.readbyqxmd.com/read/28525624/early-and-asymptomatic-cardiac-dysfunction-in-chronic-kidney-disease
#9
Shanmugakumar Chinnappa, Edward White, Nigel Lewis, Omer Baldo, Yu-Kang Tu, Griet Glorieux, Raymond Vanholder, Meguid El Nahas, Andrew Mooney
Background: . Heart failure (HF) is highly prevalent and associated with high mortality in chronic kidney disease (CKD). However, the pathophysiology of cardiac dysfunction in CKD, especially in the early asymptomatic stage, is not well understood. We studied subclinical cardiac dysfunction in asymptomatic CKD patients without comorbid cardiac disease or diabetes mellitus by evaluating peak cardiac performance. Methods.: In a cross-sectional study ( n  = 130) we investigated 70 male non-diabetic CKD patients (21 CKD stage 2-3a, 27 CKD stage 3b-4 and 22 CKD stage 5) employing specialized cardiopulmonary exercise testing to measure peak cardiac output and cardiac power output non-invasively...
May 19, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28525419/safe-hydration-volume-to-prevent-contrast-induced-acute-kidney-injury-and-worsening-heart-failure-in-patients-with-heart-failure-and-preserved-ejection-fraction-following-cardiac-catheterization
#10
Wei-Jie Bei, Kun Wang, Hua-Long Li, Kai-Yang Lin, Xiao-Sheng Guo, Shi-Qun Chen, Yong Liu, Shi-Xin Yi, De-Mou Luo, Ji-Yan Chen, Fesc, Ning Tan
Few studies have investigated the efficacy and safety of hydration to prevent contrast-induced acute kidney injury (CI-AKI) and worsening heart failure (WHF) following cardiac catheterization in heart failure and preserved ejection fraction (HFpEF; HF and EF ≥50%) patients. We recruited 1206 patients with HFpEF undergoing cardiac catheterization with peri-procedural hydration volume/weight ratios (HV/W) data and investigated the relationship between hydration volumes and risk of CI-AKI and WHF. Incidence of CI-AKI was not significantly reduced in individuals with higher HV/W (quartile [Q] 1, Q2, Q3, and Q4: 9...
April 27, 2017: Journal of Cardiovascular Pharmacology
https://www.readbyqxmd.com/read/28524237/in-vitro-dialysis-of-cytokine-rich-plasma-with-high-and-medium-cut-off-membranes-reduces-its-procalcific-activity
#11
Kevin Willy, Michael Hulko, Markus Storr, Rose Speidel, Julia Gauss, Ralf Schindler, Daniel Zickler
Recently developed high-flux (HF) dialysis membranes with extended permeability provide better clearance of middle-sized molecules such as interleukins (ILs). Whether this modulation of inflammation influences the procalcific effects of septic plasma on vascular smooth muscle cells (VSMCs) is not known. To assess the effects of high cut-off (HCO) and medium cut-off (MCO) membranes on microinflammation and in vitro vascular calcification we developed a miniature dialysis model. Plasma samples from lipopolysaccharide-spiked blood were dialyzed with HF, HCO, and MCO membranes in an in vitro miniature dialysis model...
May 19, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28523370/use-of-tolvaptan-vs-furosemide-in-older-patients-with-heart-failure-meta-analysis-of-randomized-controlled-trials
#12
W-L Huang, Y Yang, J Yang, J Yang, H-B Wang, X-L Xiong, Y-F Zhang
BACKGROUND: It is not known whether older patients with acute heart failure (HF) receiving tolvaptan have decreased mortality rates and a better long-term prognosis than patients who receive furosemide. We conducted a systematic review of randomized controlled trials (RCTs) to address this issue. METHODS: The Medline, Embase, and Cochrane Library databases were searched for English-language RCTs published before September 2016 comparing tolvaptan with furosemide treatment in older patients (>65 years old) after acute HF...
May 18, 2017: Herz
https://www.readbyqxmd.com/read/28523032/serum-uric-acid-level-in-the-severity-of-congestive-heart-failure-chf
#13
Adnan Khan, Mohammad Hassan Shah, Sarbiland Khan, Umama Shamim, Sanan Arshad
BACKGROUND AND OBJECTIVE: It has been observed that in a clinical condition like hypoxemia there is an increase in the serum Uric acid level. The objective of our study was to find out the relationship between serum uric acid levels in the severity of Heart failure. METHODS: We analyze 285 patients with a diagnosis of Congestive heart failure admitted in Lady Reading Hospital Peshawar from March 1(st) to August 2016. Age group of patients was 17- 67 years. New York Health Association (NYHA) scoring were used to access the severity of Congestive Heart Failure...
March 2017: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/28522838/fabrication-of-full-color-gan-based-light-emitting-diodes-on-nearly-lattice-matched-flexible-metal-foils
#14
Hyeryun Kim, Jitsuo Ohta, Kohei Ueno, Atsushi Kobayashi, Mari Morita, Yuki Tokumoto, Hiroshi Fujioka
GaN-based light-emitting diodes (LEDs) have been widely accepted as highly efficient solid-state light sources capable of replacing conventional incandescent and fluorescent lamps. However, their applications are limited to small devices because their fabrication process is expensive as it involves epitaxial growth of GaN by metal-organic chemical vapor deposition (MOCVD) on single crystalline sapphire wafers. If a low-cost epitaxial growth process such as sputtering on a metal foil can be used, it will be possible to fabricate large-area and flexible GaN-based light-emitting displays...
May 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28522164/heart-failure-post-hospital-mortality-and-renal-function-in-tanzania-a-prospective-cohort-study
#15
Justin R Kingery, Missana Yango, Bahati Wajanga, Fredrick Kalokola, Josef Brejt, Johannes Kataraihya, Robert Peck
OBJECTIVE: To determine one-year, post-hospital mortality and the predictors of mortality in Tanzanian adults with heart failure (HF) compared to other admitted adults. METHODS: In this prospective cohort study we consecutively enrolled medical inpatients admitted during a 3-month period, screened for HF and followed until 12 months after hospital discharge. Standardized history, physical examination, echocardiography and laboratory investigations were obtained during hospital presentation...
May 9, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28521892/achieving-a-maximally-tolerated-%C3%AE-blocker-dose-in-heart-failure-patients-is-there-room%C3%A2-for%C3%A2-improvement
#16
REVIEW
Ankeet S Bhatt, Adam D DeVore, Tracy A DeWald, Karl Swedberg, Robert J Mentz
Heart failure (HF) is associated with significant morbidity and mortality. Although initially thought to be harmful in HF, beta-adrenergic blockers (β-blockers) have consistently been shown to reduce mortality and HF hospitalization in chronic HF with reduced ejection fraction. Proposed mechanisms include neurohormonal blockade and heart rate reduction. A new therapeutic agent now exists to target further heart rate lowering in patients who have been stable on a "maximally tolerated β-blocker dose," but this definition and how to achieve it are incompletely understood...
May 23, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28521890/reproductive-factors-and-incidence-of%C3%A2-heart-failure-hospitalization-in-the%C3%A2-women-s-health%C3%A2-initiative
#17
Philip S Hall, Gregory Nah, Barbara V Howard, Cora E Lewis, Matthew A Allison, Gloria E Sarto, Molly E Waring, Lisette T Jacobson, JoAnn E Manson, Liviu Klein, Nisha I Parikh
BACKGROUND: Reproductive factors reflective of endogenous sex hormone exposure might have an effect on cardiac remodeling and the development of heart failure (HF). OBJECTIVES: This study examined the association between key reproductive factors and the incidence of HF. METHODS: Women from a cohort of the Women's Health Initiative were systematically evaluated for the incidence of HF hospitalization from study enrollment through 2014. Reproductive factors (number of live births, age at first pregnancy, and total reproductive duration [time from menarche to menopause]) were self-reported at study baseline in 1993 to 1998...
May 23, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28521863/high-pre-ischemic-fatty-acid-levels-decrease-cardiac-recovery-in-an-isolated-rat-heart-model-of-donation-after-circulatory-death
#18
Petra Niederberger, Emilie Farine, Maria Arnold, Rahel K Wyss, Maria N Sanz, Natalia Méndez-Carmona, Brigitta Gahl, Georg M Fiedler, Thierry P Carrel, Hendrik T Tevaearai Stahel, Sarah L Longnus
RATIONALE: Donation after circulatory death (DCD) could improve cardiac graft availability. However, strategies to optimize cardiac graft recovery remain to be established in DCD; these hearts would be expected to be exposed to high levels of circulatory fat immediately prior to the inevitable period of ischemia prior to procurement. OBJECTIVE: We investigated whether acute exposure to high fat prior to warm, global ischemia affects subsequent hemodynamic and metabolic recovery in an isolated rat heart model of DCD...
June 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28520449/-novelties-in-the-treatment-of-heart-failure
#19
Filip Souček, Jan Novak
Heart failure (HF) is a complex clinical syndrome which is manifested by characteristic symptoms and objective signs of cardiac insufficiency. The incidence of HF, particularly its chronic form, is estimated 0.4-2 % in the central and western Europe, with an increase in higher age groups, affecting 10-20 % of the population aged over 80. With respect to its growing incidence and prevalence, novel modalities of pharmacological and non-pharmacological treatment are being developed in order to improve quality of life and survival of the affected patients...
2017: Vnitr̆ní Lékar̆ství
https://www.readbyqxmd.com/read/28518178/physical-function-and-exercise-training-in-older-patients-with-heart-failure
#20
REVIEW
Andrew J Stewart Coats, Daniel E Forman, Mark Haykowsky, Dalane W Kitzman, Amy McNeil, Tavis S Campbell, Ross Arena
Heart failure (HF) is a common end point for numerous cardiovascular conditions, including coronary artery disease, valvular disease, and hypertension. HF predominantly affects older individuals (aged ≥70 years), particularly those living in developed countries. The pathophysiological sequelae of HF progression have a substantial negative effect on physical function. Diminished physical function in older patients with HF, which is the result of combined disease-related and age-related effects, has important implications on health...
May 18, 2017: Nature Reviews. Cardiology
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