keyword
MENU ▼
Read by QxMD icon Read
search

Ratio wave

keyword
https://www.readbyqxmd.com/read/28432058/mk5-haplodefficiency-attenuates-hypertrophy-and-preserves-diastolic-function-during-remodeling-induced-by-chronic-pressure-overload-in-the-mouse-heart
#1
Sherin Nawaito, Dharmendra Dingar, Pramod Sahadevan, Bahira Hussein, Fatiha Sahmi, Yanfen Shi, Marc-Antoine Gillis, Matthias Gaestel, Jean-Claude Tardif, Bruce G Allen
MK5 is a protein serine and threonine kinase that is activated by p38 MAPK and the atypical MAPKs ERK3 and ERK4. The physiological function(s) of MK5 remain unknown. Herein we examine the effect of MK5 haplodeficiency on cardiac function and myocardial remodeling. At 12-weeks of age, MK5 haplodeficient mice (MK5(+/-)) were smaller than age-matched wild-type litter mates (MK5(+/+)), with similar diastolic function but reduced systolic function. Transverse aortic constriction (TAC) was employed to induce a chronic pressure overload in twelve-week-old male MK5(+/-) and MK5(+/+) mice...
April 21, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28431617/short-term-outcome-of-functional-integrity-of-the-auditory-brainstem-in-term-infants-who-suffer-perinatal-asphyxia
#2
Ze D Jiang, Cao Chen
OBJECTIVES: To assess short-term outcome of impaired functional integrity of the auditory brainstem in term infants who suffer perinatal asphyxia. METHODS: Maximum length sequence brainstem auditory evoked response (MLS BAER) was recorded and analyzed at a mean age of 3months in term infants after perinatal asphyxia. The data were compared with age-matched normal term infants. RESULTS: The infants after asphyxia showed an increase in the latency of MLS BAER wave III at 91, 455 and 910/s, and wave V at all click rates of 91-910/s...
May 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28431362/rna-aptamer-based-electrochemical-aptasensor-for-c-reactive-protein-detection-using-functionalized-silica-microspheres-as-immunoprobes
#3
Junchun Wang, Jinjin Guo, Junjun Zhang, Wenjuan Zhang, Yuzhong Zhang
C-reactive protein (CRP) is a widely accepted biomarker of cardiovascular disease and inflammation. In this study, a RNA aptamer-based electrochemical sandwich type aptasensor for CRP detection was described using the functionalized silica microspheres as immunoprobes. Silica microspheres (Si MSs), which have good monodispersity and uniform shape, were firstly synthesized. The silica microspheres functionlized with gold nanoparticles (Au NPs) provided large surface area for immobilizing signal molecules (Zinc ions, Zn(2+)) and antibodies (Ab)...
April 13, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28430249/study-of-a-reflection-grating-used-in-littrow-mount
#4
D M Capps
The near and far fields of a finite conductivity metallic grating with symmetrical triangular facets, used in Littrow mount, are studied. A new Green's function approach, based on the Hertz vector, is introduced and used to propagate throughout a two-dimensional domain. The field quantity of primary interest is Poynting's vector; however, the stored power is also calculated. In assessing the fields generated by the propagator, a quasi-periodic dependence of output characteristics on the grating depth to period ratio, discussed in the literature, is also found in the present study...
April 20, 2017: Applied Optics
https://www.readbyqxmd.com/read/28430232/phase-locking-of-a-mode-locked-titanium-sapphire-laser-based-optical-frequency-comb-to-a-reference-laser-using-a-fast-piezoelectric-actuator
#5
Shuhei Hatanaka, Kazuhiko Sugiyama, Masatoshi Mitaki, Masatoshi Misono, Sergey N Slyusarev, Masao Kitano
We phase lock an octave-spanning optical frequency comb, generated using a mode-locked titanium-sapphire laser and a photonic-crystal fiber, to a continuous-wave laser line-narrowed to a reference cavity. To phase lock the pulse-repetition frequency, the cavity length of the mode-locked laser is controlled by using a fast piezoelectric-actuated mirror of a servo bandwidth up to 80 kHz. The residual phase noise is 0.35 rad, and 89% of the power is concentrated to the carrier. To apply the system to optical frequency-ratio measurements and to evaluate the phase locking, a simultaneous frequency measurement of the beat between the other mode of the comb and another laser line-narrowed to a different resonance of the common reference cavity is demonstrated...
April 20, 2017: Applied Optics
https://www.readbyqxmd.com/read/28429921/relationship-between-dietary-patterns-and-brachial-ankle-pulse-wave-velocity-among-middle-aged-adults-in-japan
#6
Shota Moyama, Kazuhiro Minami, Mihiro Yano, Masumi Okumura, Susumu Hayashi, Hiroshi Takayama, Akira Yorimoto
BACKGROUND AND OBJECTIVES: Arterial stiffness is a leading cause of cardiovascular disease (CVD), and it is considered to be affected by dietary intake. However, few studies have examined the relationship between major dietary patterns and brachial-ankle pulse wave velocity (baPWV) among Japanese middle-aged subjects. We studied whether major dietary patterns were associated with baPWV in this population. METHODS AND STUDY DESIGN: Between 2009 and 2012, 70 Japanese middle-aged subjects (39 men and 31 women) with no history of stroke, coronary heart disease, or cancer were studied...
May 2017: Asia Pacific Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28429850/association-of-obstructive-sleep-apnea-with-arterial-stiffness-and-nondipping-blood-pressure-in-patients-with-hypertension
#7
Raimundo Jenner, Fernanda Fatureto-Borges, Valéria Costa-Hong, Heno F Lopes, Sandra H Teixeira, Elias Marum, Dante A M Giorgi, Fernanda M Consolim-Colombo, Luiz A Bortolotto, Geraldo Lorenzi-Filho, Eduardo M Krieger, Luciano F Drager
Whether sex influences the association of obstructive sleep apnea (OSA) with markers of cardiovascular risk in patients with hypertension is unknown. In this study, 95 hypertensive participants underwent carotid-femoral pulse wave velocity, 24-hour ambulatory blood pressure monitoring, echocardiogram, and polysomnography after a 30-day standardized treatment with hydrochlorothiazide plus enalapril or losartan. OSA was present in 52 patients. Compared with non-OSA patients, pulse wave velocity values were higher in the OSA group (men: 11...
April 21, 2017: Journal of Clinical Hypertension
https://www.readbyqxmd.com/read/28429689/relationship-between-fragmented-qrs-complexes-in-leads-v4-v6-and-left-ventricular-apical-thrombus-formation-in-patients-presenting-with-first-acute-anterior-myocardial-infarction
#8
Erkan Baysal, Cengiz Burak, Barış Yaylak, Bernas Altıntaş, Önder Öztürk, Hacı Çiftçi, Rojhat Altındağ, Serdar Söner
OBJECTIVE: The present study was an investigation of the relationship between fragmented QRS (fQRS) and left ventricular apical thrombus (LVAT) in patients presenting with first acute anterior myocardial infarction (MI). METHODS: Consecutive 148 patients (mean age: 60.1±10.1 years; male: 75.6%) with first acute anterior MI who underwent primary percutaneous coronary intervention (PCI) were included. Study population was divided into 2 groups based on presence of LVAT...
April 2017: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
https://www.readbyqxmd.com/read/28429460/automated-t-wave-analysis-can-differentiate-acquired-qt-prolongation-from-congenital-long-qt-syndrome
#9
Alan Sugrue, Peter A Noseworthy, Vaclav Kremen, J Martijn Bos, Bo Qiang, Ram K Rohatgi, Yehu Sapir, Zachi I Attia, Peter Brady, Pedro J Caraballo, Samuel J Asirvatham, Paul A Friedman, Michael J Ackerman
BACKGROUND: Prolongation of the QT on the surface electrocardiogram can be due to either genetic or acquired causes. Distinguishing congenital long QT syndrome (LQTS) from acquired QT prolongation has important prognostic and management implications. We aimed to investigate if quantitative T-wave analysis could provide a tool for the physician to differentiate between congenital and acquired QT prolongation. METHODS: Patients were identified through an institution-wide computer-based QT screening system which alerts the physician if the QTc ≥ 500 ms...
April 21, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/28427850/five-year-changes-in-cardiac-structure-and-function-in-patients-with-rheumatoid-arthritis-compared-with-the-general-population
#10
John M Davis, Grace Lin, Jae K Oh, Cynthia S Crowson, Sara J Achenbach, Terry M Therneau, Eric L Matteson, Richard J Rodeheffer, Sherine E Gabriel
BACKGROUND: Patients with rheumatoid arthritis (RA) have increased risk of heart failure with preserved ejection fraction. The development and progression of left ventricular dysfunction before onset of clinical heart failure are unknown. The objective of this study was to evaluate longitudinal changes in cardiac structure and function of patients with RA compared with persons in the general population. METHODS: A prospective longitudinal study of a population-based cohort of 160 patients with RA and a population-based cohort of 1391 persons without RA (non-RA cohort) was performed...
March 31, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28427671/ultrasound-assisted-rapid-extraction-and-kinetic-modelling-of-influential-factors-extraction-of-camptothecin-from-nothapodytes-nimmoniana-plant
#11
Dhiraj M Patil, Krishnacharya G Akamanchi
Ultrasound-assisted extraction (UAE) of commercially important natural product camptothecin (CPT) from Nothapodytes nimmoniana plant has been investigated. The influences of process factors such as electric acoustic intensity, solid to liquid ratio, duty cycle, temperature and particle size on the maximum extraction yield and kinetic mechanisms of the entire extraction process have been investigated. The kinetics results showed that increasing the intensity, duty cycle, solid to liquid ratio and decreasing the particle size lead to substantial increase in extraction yields compared to classical stirring extraction...
July 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28427378/assessment-of-cardiac-function-in-children-with-congenital-adrenal-hyperplasia-a-case-control-study-in-cameroon
#12
J Tony Nengom, S Sap Ngo Um, D Chelo, R Mbono Betoko, J Boombhi, F Mouafo Tambo, A Chiabi, S Kingue, P Koki Ndombo
BACKGROUND: High level of androgens found in congenital adrenal hyperplasia (CAH) seems to have a deleterious effect on heart function. We therefore evaluate cardiac function of children with CAH in comparison with a healthy group. METHODS: We carried out a case-control study in the single endocrinology unit of the Mother and Child Center of Chantal Biya's Foundation. Cases were matched for age and genotypic sex to 2 healthy controls. We analyzed the ejection fraction (LVEF), fractional shortening and left ventricular mass; output and cardiac index; E and A waves velocities, E/A ratio and the mitral deceleration time and diameter of the left atrium; tricuspid annular plane systolic excursion and pulmonary artery systolic pressure were also measured...
April 20, 2017: BMC Pediatrics
https://www.readbyqxmd.com/read/28423119/importance-of-serca2a-on-early-isolated-diastolic-dysfunction-induced-by-supravalvular-aortic-stenosis-in-rats
#13
C F S M P Silveira, D H S Campos, P P Freire, A F Deus, K Okoshi, C R Padovani, A C Cicogna
Cardiac remodeling is defined as changes in shape and function of the heart in response to aggression (pressure overload). The sarcoplasmic reticulum calcium ATPase cardiac isoform 2a (SERCA2a) is a known factor that influences function. A wide spectrum of studies report a decrease in SERCA2a in heart failure, but none evaluate it's the role in early isolated diastolic dysfunction in supravalvular aortic stenosis (AoS). Our hypothesis was that SERCA2a participates in such dysfunction. Thirty-day-old male Wistar rats (60-80 g) were divided into AoS and Sham groups, which were submitted to surgery with or without aorta clipping, respectively...
April 13, 2017: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/28421174/utility-of-cardiovascular-magnetic-resonance-derived-wave-intensity-analysis-as-a-marker-of-ventricular-function-in-children-with-heart-failure-and-normal-ejection-fraction
#14
Hopewell N Ntsinjana, Robin Chung, Paolo Ciliberti, Vivek Muthurangu, Silvia Schievano, Jan Marek, Kim H Parker, Andrew M Taylor, Giovanni Biglino
OBJECTIVE: This study sought to explore the diagnostic insight of cardiovascular magnetic resonance (CMR)-derived wave intensity analysis to better study systolic dysfunction in young patients with chronic diastolic dysfunction and preserved ejection fraction (EF), comparing it against other echocardiographic and CMR parameters. BACKGROUND: Evaluating systolic and diastolic dysfunctions in children is challenging, and a gold standard method is currently lacking...
2017: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/28421147/electrophysiological-morphological-and-ultrastructural-features-of-the-injured-spinal-cord-tissue-after-transplantation-of-human-umbilical-cord-blood-mononuclear-cells-genetically-modified-with-the-vegf-and-gdnf-genes
#15
Y O Mukhamedshina, Z E Gilazieva, S S Arkhipova, L R Galieva, E E Garanina, A A Shulman, G G Yafarova, Y A Chelyshev, N V Shamsutdinova, A A Rizvanov
In this study, we examined the efficacy of human umbilical cord blood mononuclear cells (hUCB-MCs), genetically modified with the VEGF and GDNF genes using adenoviral vectors, on posttraumatic regeneration after transplantation into the site of spinal cord injury (SCI) in rats. Thirty days after SCI, followed by transplantation of nontransduced hUCB-MCs, we observed an improvement in H (latency period, LP) and M(Amax) waves, compared to the group without therapy after SCI. For genetically modified hUCB-MCs, there was improvement in Amax of M wave and LP of both the M and H waves...
2017: Neural Plasticity
https://www.readbyqxmd.com/read/28419487/the-effect-of-medicaid-physician-fee-increases-on-health-care-access-utilization-and-expenditures
#16
Kevin Callison, Binh T Nguyen
OBJECTIVE: To evaluate the effect of Medicaid fee changes on health care access, utilization, and spending for Medicaid beneficiaries. DATA SOURCE: We use the 2008 and 2012 waves of the Medical Expenditure Panel Survey linked to state-level Medicaid-to-Medicare primary care reimbursement ratios obtained through surveys conducted by the Urban Institute. We also incorporate data from the Current Population Survey and the Area Resource Files. STUDY DESIGN: Using a control group made up of the low-income privately insured, we conduct a difference-in-differences analysis to assess the relationship between Medicaid fee changes and access to care, utilization of health care services, and out-of-pocket medical expenditures for Medicaid enrollees...
April 16, 2017: Health Services Research
https://www.readbyqxmd.com/read/28416512/investigating-the-genetic-architecture-of-the-pr-interval-using-clinical-phenotypes
#17
Jonathan D Mosley, M Benjamin Shoemaker, Quinn S Wells, Dawood Darbar, Christian M Shaffer, Todd L Edwards, Lisa Bastarache, Catherine A McCarty, Will Thompson, Christopher G Chute, Gail P Jarvik, David R Crosslin, Eric B Larson, Iftikhar J Kullo, Jennifer A Pacheco, Peggy L Peissig, Murray H Brilliant, James G Linneman, John S Witte, Josh C Denny, Dan M Roden
BACKGROUND: One potential use for the PR interval is as a biomarker of disease risk. We hypothesized that quantifying the shared genetic architectures of the PR interval and a set of clinical phenotypes would identify genetic mechanisms contributing to PR variability and identify diseases associated with a genetic predictor of PR variability. METHODS AND RESULTS: We used ECG measurements from the ARIC study (Atherosclerosis Risk in Communities; n=6731 subjects) and 63 genetically modulated diseases from the eMERGE network (Electronic Medical Records and Genomics; n=12 978)...
April 2017: Circulation. Cardiovascular Genetics
https://www.readbyqxmd.com/read/28416375/automatic-and-manual-doppler-velocimetry-measurements-of-the-uterine-artery-in-pregnant-ewes
#18
Renato Travassos Beltrame, Lucas Buss Littig, Carolina Covre, Amanda de Barros Martins, Celia Raquel Quirino, R L D Costa
We aimed to compare measurements of speed and blood flow parameters obtained manually and automatically in the uterine arteries of pregnant ewes. Eighteen Santa Inês ewes, confirmed to be pregnant, were followed every 2 weeks until parturition. The systolic peak (PS), end diastolic velocity (ED), maximum and average speed in the cardiac cycle (TAMAX and TAMEAN, respectively), pulsatility index (PI), resistance index (RI) and the systole/diastole (S/D) ratio and body flow volume (BFV) was measured. We began the wave evaluation automatically, then the observer manually marked the beginning and end of the wave...
March 31, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28416296/hiv-infection-and-aortic-stiffness
#19
REVIEW
Luisa Helena Maia Leite, Ariel Cohen, Franck Boccara
People living with human immunodeficiency virus (HIV) infection and receiving antiretroviral therapy now have the same life expectancy as the general population. However, they have a higher risk of atherosclerotic cardiovascular events because of a complex and polyfactorial vasculopathy, combining the effects of antiretroviral therapy, the HIV virus itself, immune activation, chronic inflammation and metabolic disturbances. Whether people living with HIV infection experience increased vascular aging compared with the general population remains controversial...
April 14, 2017: Archives of Cardiovascular Diseases
https://www.readbyqxmd.com/read/28415786/arterial-stiffness-and-blood-pressure-improvement-in-aldosterone-producing-adenoma-harboring-kcnj5-mutations-after-adrenalectomy
#20
Chia-Hui Chang, Ya-Hui Hu, Yao-Chou Tsai, Che-Hsiung Wu, Shuo-Meng Wang, Lian-Yu Lin, Yen-Hung Lin, Fumitoshi Satoh, Kwan-Dun Wu, Vin-Cent Wu
The aim of this study was to show the effect of KCNJ5 mutational status on arterial stiffness in aldosterone-producing adenomas after adrenalectomy. Between February 2008 and January 2010, we prospectively enrolled 108 aldosterone-producing adenoma patients undergoing adrenalectomy. We conducted repeated measurements of pulse wave velocity at baseline, 6 months, and 12 months after adrenalectomy, grouped by KCNJ5 mutational status. Prognostic factors of arterial stiffness and risk for hypertension at 12 months after adrenalectomy were analyzed after propensity score matching in a 1:1 ratio...
March 16, 2017: Oncotarget
keyword
keyword
2781
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"