keyword
MENU ▼
Read by QxMD icon Read
search

Rhythm

keyword
https://www.readbyqxmd.com/read/27936113/preoperative-csf-melatonin-concentrations-and-the-occurrence-of-delirium-in-older-hip-fracture-patients-a-preliminary-study
#1
Rikie M Scholtens, Sophia E J A de Rooij, Annelies E Vellekoop, Bart C Vrouenraets, Barbara C van Munster
BACKGROUND: Delirium is characterized by disturbances in circadian rhythm. Melatonin regulates our circadian rhythm. Our aim was to compare preoperative cerebrospinal fluid (CSF) melatonin levels in patients with and without postoperative delirium. METHODS: Prospective cohort study with hip fracture patients ≥ 65 years who were acutely admitted to the hospital for surgical treatment and received spinal anaesthesia. CSF was collected after cannulation, before administering anaesthetics...
2016: PloS One
https://www.readbyqxmd.com/read/27936050/gene-targeted-mice-with-the-human-troponin-t-r141w-mutation-develop-dilated-cardiomyopathy-with-calcium-desensitization
#2
Mohun Ramratnam, Guy Salama, Ravi K Sharma, David Wen Rui Wang, Stephen H Smith, Sanjay K Banerjee, Xueyin N Huang, Lindsey M Gifford, Michele L Pruce, Bethann E Gabris, Samir Saba, Sanjeev G Shroff, Ferhaan Ahmad
Most studies of the mechanisms leading to hereditary dilated cardiomyopathy (DCM) have been performed in reconstituted in vitro systems. Genetically engineered murine models offer the opportunity to dissect these mechanisms in vivo. We generated a gene-targeted knock-in murine model of the autosomal dominant Arg141Trp (R141W) mutation in Tnnt2, which was first described in a human family with DCM. Mice heterozygous for the mutation (Tnnt2R141W/+) recapitulated the human phenotype, developing left ventricular dilation and reduced contractility...
2016: PloS One
https://www.readbyqxmd.com/read/27935605/evolution-of-the-circuitry-for-conscious-color-vision-in-primates
#3
J Neitz, M Neitz
There are many ganglion cell types and subtypes in our retina that carry color information. These have appeared at different times over the history of the evolution of the vertebrate visual system. They project to several different places in the brain and serve a variety of purposes allowing wavelength information to contribute to diverse visual functions. These include circadian photoentrainment, regulation of sleep and mood, guidance of orienting movements, detection and segmentation of objects. Predecessors to some of the circuits serving these purposes presumably arose before mammals evolved and different functions are represented by distinct ganglion cell types...
December 9, 2016: Eye
https://www.readbyqxmd.com/read/27935075/nerve-conduction-studies-are-safe-in-patients-with-central-venous-catheters
#4
Zachary N London, Andrew Mundwiler, Hakan Oral, Gary W Gallagher
INTRODUCTION: It is unknown if central venous catheters bypass the skin's electrical resistance and engender a risk of nerve conduction study-induced cardiac arrhythmia. OBJECTIVE: To determine if nerve conduction studies affect cardiac conduction and rhythm in patients with central venous catheters. METHODS: Under continuous 12-lead electrocardiogram monitoring, subjects with and without central venous catheters underwent a series of upper extremity nerve conduction studies...
December 9, 2016: Muscle & Nerve
https://www.readbyqxmd.com/read/27935015/extracorporeal-cardiopulmonary-resuscitation-after-out-of-hospital-cardiac-arrest-in-a-danish-health-region
#5
J Fjølner, J Greisen, M R S Jørgensen, C J Terkelsen, L B Ilkjaer, T M Hansen, H Eiskjaer, S Christensen, J Gjedsted
BACKGROUND: Extracorporeal Cardiopulmonary Resuscitation (ECPR) has emerged as a feasible rescue therapy for refractory, normothermic out-of-hospital cardiac arrest (OHCA). Reported survival rates vary and comparison between studies is hampered by heterogeneous study populations, differences in bystander intervention and in pre-hospital emergency service organisation. We aimed to describe the first experiences, treatment details, complications and outcome with ECPR for OHCA in a Danish health region...
December 9, 2016: Acta Anaesthesiologica Scandinavica
https://www.readbyqxmd.com/read/27934625/ultrasonographic-findings-in-two-sheep-with-enzootic-calcinosis
#6
U Braun, K Mitchell, S Schramm, S Nogler, J Hatt, A Malbon
This report describes 2 sheep with enzootic calcinosis characterized by abnormal cardiovascular and respiratory findings and ascites causing abdominal distension. Both sheep were anorexic and listless and had increased heart and respiratory rates. Auscultation of the heart revealed a gallop rhythm in sheep 1 and a loud systolic heart murmur in sheep 2. The activities of liver enzymes were severely increased in both sheep. Abdominal ultrasonography showed severe ascites and congestion of the liver and caudal vena cava...
December 2016: Schweizer Archiv Für Tierheilkunde
https://www.readbyqxmd.com/read/27933672/single-neuron-activity-and-theta-modulation-in-the-posterior-parietal-cortex-in-a-visuospatial-attention-task
#7
Fang-Chi Yang, T K Jacobson, R D Burwell
The posterior parietal cortex (PPC) is implicated in directing and maintaining visual attention to locations in space. We hypothesized that the PPC also engages other cognitive processes in the transformation of behaviorally relevant visual inputs into appropriate actions, for example, monitoring of multiple locations, selection of responses to locations in space, and monitoring the outcome of response selections. We recorded single cells and local field potentials in the rat PPC during performance on a novel visuospatial attention (VSA) task that requires visually monitoring locations in space in order to make appropriate stimulus-guided locomotor responses...
December 9, 2016: Hippocampus
https://www.readbyqxmd.com/read/27933105/prevalence-of-atrial-fibrillation-in-the-malaysian-communities
#8
Chiao Wen Lim, Sazzli Kasim, Johan Rizwal Ismail, Nicholas Yul Chye Chua, Rizmy Najme Khir, Hafisyatul Aiza Zainal Abidin, Effarezan Abdul Rahman, Mohd Kamal Mohd Arshad, Zubin Ibrahim Othman, Khalid Yusoff
BACKGROUND AND AIM: Atrial fibrillation (AF) is the most common sustained cardiac arrhythmia encountered in clinical practice. The REDISCOVER (Responding to Increasing Cardiovascular disease prevalence) study is an observational longitudinal community-based study that tracks changing lifestyles, risk factors and chronic disease in urban and rural areas of Malaysia. In this study, we aim to study the prevalence of AF and its associated risk factors. METHODS: The study was conducted between 2007 and 2014...
2016: Heart Asia
https://www.readbyqxmd.com/read/27933073/mistletoe-berry-outline-mapping-with-a-path-curve-function-and-recording-the-circadian-rhythm-of-their-phenotypic-shape-change
#9
Renatus Derbidge, Stephan Baumgartner, Peter Heusser
This paper presents a discovery: the change of the outline shape of mistletoe (Viscum album ssp. album) berries in vivo and in situ during ripening. It was found that a plant organ that is usually considered to merely increase in size actually changes shape in a specific rhythmic fashion. We introduce a new approach to chronobiological research on a macro-phenotypic scale to trace changes over long periods of time (with a resolution from hours to months) by using a dynamic form-determining parameter called Lambda (λ)...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27932426/extracorporeal-membrane-oxygenation-for-hemodynamic-support-of-ventricular-tachycardia-ablation
#10
Francesca Baratto, Federico Pappalardo, Teresa Oloriz, Caterina Bisceglia, Pasquale Vergara, John Silberbauer, Nicolò Albanese, Manuela Cireddu, Giuseppe D'Angelo, Ambra Licia Di Prima, Fabrizio Monaco, Gabriele Paglino, Andrea Radinovic, Damiano Regazzoli, Simona Silvetti, Nicola Trevisi, Alberto Zangrillo, Paolo Della Bella
BACKGROUND: We report the experience in a cohort of consecutive patients receiving extracorporeal membrane oxygenation during catheter ablation of unstable ventricular tachycardia (VT) at our center. METHODS AND RESULTS: From 2010 to 2015, extracorporeal membrane oxygenation was initiated in 64 patients (average age: 63±15 years; left ventricular ejection fraction in 27±9%; cardiogenic shock in 23%, and electrical storm in 62% of patients) undergoing 74 unstable VT catheter ablation procedures...
December 2016: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/27931605/bariatric-surgery-and-the-risk-of-new-onset-atrial-fibrillation-in-swedish%C3%A2-obese-subjects
#11
Shabbar Jamaly, Lena Carlsson, Markku Peltonen, Peter Jacobson, Lars Sjöström, Kristjan Karason
BACKGROUND: Obesity is a risk factor for atrial fibrillation, which in turn is associated with stroke, heart failure, and increased all-cause mortality. OBJECTIVES: The authors investigated whether weight loss through bariatric surgery may reduce the risk of new-onset atrial fibrillation. METHODS: SOS (Swedish Obese Subjects) is a prospective matched cohort study conducted at 25 surgical departments and 480 primary healthcare centers in Sweden...
December 13, 2016: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/27931190/daily-rhythmicity-of-clock-gene-transcript-levels-in-fast-and-slow-muscle-fibers-from-chinese-perch-siniperca-chuatsi
#12
Ping Wu, Yu-Long Li, Jia Cheng, Lin Chen, Xin Zhu, Zhi-Guo Feng, Jian-She Zhang, Wu-Ying Chu
BACKGROUND: Clock genes are considered to be the molecular core of biological clock in vertebrates and they are directly involved in the regulation of daily rhythms in vertebrate tissues such as skeletal muscles. Fish myotomes are composed of anatomically segregated fast and slow muscle fibers that possess different metabolic and contractile properties. To date, there is no report on the characterization of the circadian clock system components of slow muscles in fish. RESULTS: In the present study, the molecular clock components (clock, arntl1/2, cry1/2/3, cry-dash, npas2, nr1d1/2, per1/2/3, rorα and tim genes) and their daily transcription levels were characterized in slow and fast muscles of Chinese perch (Siniperca chuatsi)...
December 8, 2016: BMC Genomics
https://www.readbyqxmd.com/read/27931167/astronomy-and-calendar-reform-at-the-curia-of-pope-clement-vi-a-new-source
#13
C Philipp E Nothaft
The article introduces a previously unknown fourteenth-century treatise on computus and calendrical astronomy entitled Expositio kalendarii novi, whose author proposed elaborate solutions to the technical flaws inherent in the calendar used by the Roman Church. An analysis of verbal parallels to other contemporary works on the same topic makes it possible to establish that the Expositio was produced in the context of a calendar reform initiative led by Pope Clement VI in 1344/45 and that this anonymous text is probably identical to a 'great and laborious work' on the calendar that the monk Johannes de Termis prepared for the pope around this time...
December 9, 2016: Annals of Science
https://www.readbyqxmd.com/read/27929128/extraordinary-behavioral-entrainment-following-circadian-rhythm-bifurcation-in-mice
#14
Elizabeth M Harrison, Thijs J Walbeek, Jonathan Sun, Jeremy Johnson, Qays Poonawala, Michael R Gorman
The mammalian circadian timing system uses light to synchronize endogenously generated rhythms with the environmental day. Entrainment to schedules that deviate significantly from 24 h (T24) has been viewed as unlikely because the circadian pacemaker appears capable only of small, incremental responses to brief light exposures. Challenging this view, we demonstrate that simple manipulations of light alone induce extreme plasticity in the circadian system of mice. Firstly, exposure to dim nocturnal illumination (<0...
December 8, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27929109/a-novel-method-to-visualise-and-quantify-circadian-misalignment
#15
Dorothee Fischer, Céline Vetter, Till Roenneberg
The circadian clock governs virtually all processes in the human body, including sleep-wake behaviour. Circadian misalignment describes the off-set between sleep-wake cycles and clock-regulated physiology. This strain is predominantly caused by external (societal) demands including shift work, early school start times and fast travels across time zones. Sleeping at the 'wrong' internal time can jeopardise health and safety, and we therefore need a good quantification of this phenomenon. Here, we propose a novel method to quantify the mistiming of sleep-wake rhythms and demonstrate its versatility in day workers and shift workers...
December 8, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27929004/gamma-frequency-entrainment-attenuates-amyloid-load-and-modifies-microglia
#16
Hannah F Iaccarino, Annabelle C Singer, Anthony J Martorell, Andrii Rudenko, Fan Gao, Tyler Z Gillingham, Hansruedi Mathys, Jinsoo Seo, Oleg Kritskiy, Fatema Abdurrob, Chinnakkaruppan Adaikkan, Rebecca G Canter, Richard Rueda, Emery N Brown, Edward S Boyden, Li-Huei Tsai
Changes in gamma oscillations (20-50 Hz) have been observed in several neurological disorders. However, the relationship between gamma oscillations and cellular pathologies is unclear. Here we show reduced, behaviourally driven gamma oscillations before the onset of plaque formation or cognitive decline in a mouse model of Alzheimer's disease. Optogenetically driving fast-spiking parvalbumin-positive (FS-PV)-interneurons at gamma (40 Hz), but not other frequencies, reduces levels of amyloid-β (Aβ)1-40 and Aβ 1-42 isoforms...
December 7, 2016: Nature
https://www.readbyqxmd.com/read/27928962/neural-circuits-underlying-fly-larval-locomotion
#17
Hiroshi Kohsaka, Pierre A Guertin, Akinao Nose
Locomotion is a complex motor behavior that may be expressed in different ways using a variety of strategies depending upon species and pathological or environmental conditions. Quadrupedal or bipedal walking, running, swimming, flying and gliding constitute some of the locomotor modes enabling the body, in all cases, to move from one place to another. Despite these apparent differences in modes of locomotion, both vertebrate and invertebrate species share, at least in part, comparable neural control mechanisms for locomotor rhythm and pattern generation and modulation...
December 8, 2016: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/27928866/semi-automatic-software-based-detection-of-atrial-fibrillation-in-acute-ischaemic-stroke-and-transient-ischaemic-attack
#18
M N Nickelsen, A Snoer, A M Ali, T Wienecke
BACKGROUND AND PURPOSE: Paroxysmal atrial fibrillation (PAF) is often asymptomatic and increases the risk of ischaemic stroke. Detection of PAF is challenging but crucial because a change of treatment decreases the risk of ischaemic stroke. Post-stroke investigations recommend at least 24-h continuous cardiac rhythm monitoring. Extended monitoring detects more PAF but is limited by costs due to manual analysis. Interpretive software might be a reasonable screening tool. The aim was to validate the performance and utility of Pathfinder SL software compared to manual analysis...
December 7, 2016: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/27928822/-solanum-tuberosum-zpr1-encodes-a-light-regulated-nuclear-dna-binding-protein-adjusting-the-circadian-expression-of-stbbx24-to-light-cycle
#19
Agnieszka Kiełbowicz-Matuk, Jagoda Czarnecka, Ewa Banachowicz, Pascal Rey, Tadeusz Rorat
ZPR1 proteins belong to the C4-type of zinc finger coordinators known in animal cells to interact with other proteins and participate in cell growth and proliferation. In contrast, the current knowledge regarding plant ZPR1 proteins is very scarce. Here, we identify a novel potato nuclear factor belonging to this family and named StZPR1. StZPR1 is specifically expressed in photosynthetic organs during the light period and the ZPR1 protein is located in the nuclear chromatin fraction. Based on modeling and experimental analyses, we reveal the StZPR1 ability to bind the circadian DNA cis motif 'CAACAGCATC', named CIRC and present in the promoter of the clock-controlled double B-box StBBX24 gene, the expression of which peaks in the middle of the day...
December 8, 2016: Plant, Cell & Environment
https://www.readbyqxmd.com/read/27928594/pulmonary-hypertension-in-rheumatic-mitral-stenosis-revisited
#20
L Pourafkari, S Ghaffari, M Ahmadi, A Tajlil, N Aslanabadi, N D Nader
BACKGROUND: In patients with mitral stenosis (MS), pulmonary hypertension (PH) is a significant contributor to the associated morbidity. We aimed to study factors associated with the presence of significant PH (sPH) and whether incorporating body surface area (BSA) in the mitral valve area (MVA) would improve the predictive value of the latter. METHODS: The medical records of 558 patients with severe MS undergoing percutaneous balloon mitral commissurotomy were evaluated over a period of 8 years...
December 7, 2016: Herz
keyword
keyword
16204
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"