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https://www.readbyqxmd.com/read/27925647/left-ventricular-function-assessed-by-one-point-carotid-wave-intensity-in-newly-diagnosed-untreated-hypertensive-patients
#1
Olga Vriz, Serena Favretto, Joanna Jaroch, Rychard Wojciech, Eduardo Bossone, Caterina Driussi, Francesco Antonini-Canterin, Paolo Palatini, Krystyna Loboz-Grudzien
OBJECTIVES: To investigate whether newly diagnosed untreated hypertensive patients show higher left ventricular (LV) contractility, as assessed by traditional echocardiographic indices and carotid wave intensity (WI) parameters, including amplitude of the peak during early (W1 ) and late systole (W2 ). METHODS: A total of 145 untreated hypertensive patients were compared with 145 age- and sex-matched normotensive subjects. They underwent comprehensive echocardiography and WI analysis...
November 28, 2016: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/27924959/effects-of-ramadan-fasting-on-body-composition-and-arterial-stiffness
#2
Yusuf Sezen, Ibrahim Halil Altiparmak, Muslihittin Emre Erkus, Aydemir Kocarslan, Zekeriya Kaya, Ozgur Gunebakmaz, Recep Demirbag
OBJECTIVE: To examine the effects of Ramadan fasting on body composition, arterial stiffness and resting heart rate. METHODS: This prospective study was conducted at the Department of Cardiology, Harran University, Sanliurfa, Turkey, during Ramadan 2015, and comprised overweight and obese males. Body composition, arterial stiffness and echocardiography were assessed before and after Ramadan. Body composition was assessed by bioelectrical impedance analysis using segmental body composition analyser...
December 2016: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/27923789/influence-of-sympathetic-nerve-activity-on-aortic-hemodynamics-and-pulse-wave-velocity-in-women
#3
Ronee E Harvey, Jill N Barnes, Emma C J Hart, Wayne T Nicholson, Michael J Joyner, Darren P Casey
Central (aortic) blood pressure, arterial stiffness, and sympathetic nerve activity increase with age in women. However, it is unknown if the age-related increase in sympathetic activity influences aortic hemodynamics and carotid-femoral pulse wave velocity (cfPWV), an index of central aortic stiffness. The goal of this study was to determine if aortic hemodynamics and cfPWV are directly influenced by sympathetic nerve activity by measuring aortic hemodynamics, cfPWV, and muscle sympathetic nerve activity (MSNA) in women before and during autonomic ganglionic blockade with trimethaphan camsylate...
December 6, 2016: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/27923785/genetic-determination-of-the-vascular-reactions-in-humans-in-response-to-the-diving-reflex
#4
Tatiana I Baranova, Dmitrii N Berlov, Oleg S Glotov, Ekaterina A Korf, Alexey D Minigalin, Alla V Mitrofanova, Ildus I Ahmetov, Andrey S Glotov
The purpose of this study was to investigate the genetic mechanisms of the defense vascular reactions in response to the diving reflex in humans with polymorphisms in the genes ADBR2, ACE, AGTR1, BDKRB2, and REN. We hypothesized that protective vascular reactions, in response to the diving reflex, are genetically determined and are distinguished in humans with gene polymorphisms of the renin-angiotensin and kinin-bradykinin system. A total of 80 subjects (19±1.4 years) participated in the study. The intensity of the vascular response was estimated using photopletismogram...
December 6, 2016: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/27922021/the-colored-hanbury-brown-twiss-effect
#5
B Silva, C Sánchez Muñoz, D Ballarini, A González-Tudela, M de Giorgi, G Gigli, K West, L Pfeiffer, E Del Valle, D Sanvitto, F P Laussy
The Hanbury Brown-Twiss effect is one of the celebrated phenomenologies of modern physics that accommodates equally well classical (interferences of waves) and quantum (correlations between indistinguishable particles) interpretations. The effect was discovered in the late thirties with a basic observation of Hanbury Brown that radio-pulses from two distinct antennas generate signals on the oscilloscope that wiggle similarly to the naked eye. When Hanbury Brown and his mathematician colleague Twiss took the obvious step to propose bringing the effect in the optical range, they met with considerable opposition as single-photon interferences were deemed impossible...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27920804/bone-healing-in-2016
#6
REVIEW
John A Buza, Thomas Einhorn
Delayed fracture healing and nonunion occurs in up to 5-10% of all fractures, and can present a challenging clinical scenario for the treating physician. Methods for the enhancement of skeletal repair may benefit patients that are at risk of, or have experienced, delayed healing or nonunion. These methods can be categorized into either physical stimulation therapies or biological therapies. Physical stimulation therapies include electrical stimulation, low-intensity pulsed ultrasonography, or extracorporeal shock wave therapy...
May 2016: Clinical Cases in Mineral and Bone Metabolism
https://www.readbyqxmd.com/read/27920215/plasma-nt-probnp-mirrors-the-deleterious-cardiovascular-and-renal-continuum-in-hypertension
#7
Pierre-Yves Courand, Brahim Harbaoui, Clément Bècle, Carine Mouly-Bertin, Pierre Lantelme
BACKGROUND: The aims of this study were (a) to test the ability of N-terminal pro-brain natriuretic peptide (NT-proBNP) to detect subclinical target organ damage (TOD) denoted by left ventricular hypertrophy (LVH), aortic stiffness or renal damage and (b) to test its reproducibility in two different conditions in an ancillary study. METHODS: The study included 837 patients (50.9% men) with hypertension aged 50 ± 24 years with a median 24-h ambulatory blood pressure (BP) of 148/90 mmHg...
December 5, 2016: European Journal of Preventive Cardiology
https://www.readbyqxmd.com/read/27920128/forward-and-backward-pressure-waveform-morphology-in-hypertension
#8
Ye Li, Haotian Gu, Henry Fok, Jordi Alastruey, Philip Chowienczyk
We tested the hypothesis that increased pulse wave reflection and altered backward waveform morphology contribute to increased pulse pressure in subjects with higher pulse pressure compared with lower pulse pressure and to actions of vasoactive drugs to increase pulse pressure. We examined the relationship of backward to forward wave morphology in 158 subjects who were evaluated for hypertension (including some normotensive subjects) divided into 3 groups by central pulse pressure: group 1, 33±6.5 mm Hg; group 2, 45±4...
December 5, 2016: Hypertension
https://www.readbyqxmd.com/read/27917938/high-quality-and-large-size-topological-insulator-bi2te3-gold-saturable-absorber-mirror-for-mode-locking-fiber-laser
#9
Hou-Ren Chen, Chih-Ya Tsai, Hsin-Ming Cheng, Kuei-Huei Lin, Po-Hsiu Yen, Chyong-Hua Chen, Wen-Feng Hsieh
A novel high-quality, large-size, reflection-type topological insulator Bi2Te3-Gold (BG) film-based nonlinear optical modulator has been successfully fabricated as a two-dimensional saturable absorber mirror (SAM) by pulsed laser deposition (PLD). This BG-SAM possesses saturation fluence of 108.3 μJ/cm(2), modulation depth (ΔR) of 6.5%, non-saturable loss of 38.4%, high damage threshold above 1.354 mJ/cm(2) and excellent uniformity providing for the generation of passive mode-locked (ML) pulses for erbium-doped fiber lasers (EDFLs) on a large sample area...
December 5, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27915992/plasma-phospholipids-are-associated-with-mild-cognitive-impairment-in-type-2-diabetic-patients
#10
Jin-Biao Zhang, Yan-Nan Cong, Zhen-Guang Li, Hai-Rong Sun, Jiang-Shan Zhang, Peng-Fei Wang, Qi-Zhan Wu
Phospholipids (PLs) and their metabolisms are closely allied to nosogenesis and aggravation of Type 2 diabetes mellitus and cognitive impairment. The aim of this study is to characterize the plasma levels of phospholipids in type 2 diabetes patients and type 2 diabetes patients with mild cognitive impairment (MCI), and to identify potential biomarkers of type 2 diabetes patients with MCI. In this cross-sectional study, A total of 374 type 2 diabetes patients were prospectively enrolled. There were 103 patients with MCI and 271 patients without MCI (control)...
December 1, 2016: Current Alzheimer Research
https://www.readbyqxmd.com/read/27914433/statistics-of-a-space-time-random-pulse-train
#11
Leon Cohen, Affa Ahmad
A general approach for obtaining the statistics of a pulse train is developed, where the pulses are space and time dependent, and where the initial distribution of the pulses may be non-uniform. Explicit expressions for the moments up to fourth order, in terms of the moments of the elementary signals constituting the pulse train, are obtained. This is done for elementary signals that are waves. The expressions obtained are totally general as long as the elementary signals are not correlated. In contrast to the standard scintillation index, it may be space and time dependent, in which case it is called the dynamical scintillation index...
September 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27912210/relative-contributions-of-arterial-stiffness-and-hypertension-to-cardiovascular-disease-the-framingham-heart-study
#12
Teemu J Niiranen, Bindu Kalesan, Naomi M Hamburg, Emelia J Benjamin, Gary F Mitchell, Ramachandran S Vasan
BACKGROUND: The presence and implications of abnormal arterial stiffness, a potential independent predictor of outcomes, in community-dwelling treated hypertensives is unknown. Furthermore, limited data exist regarding the risk of cardiovascular disease (CVD) associated with arterial stiffness across the entire range of blood pressure. METHODS AND RESULTS: We measured carotid-femoral pulse wave velocity (PWV) and classical CVD risk factors in 2127 community-dwelling participants (mean age 60 years, 57% women) of The Framingham Offspring Cohort...
October 26, 2016: Journal of the American Heart Association
https://www.readbyqxmd.com/read/27911144/comparison-of-pulsed-dye-laser-versus-combined-pulsed-dye-laser-and-nd-yag-laser-in-the-treatment-of-inflammatory-acne-vulgaris
#13
Manal Mohamed Salah El Din, Nevien Ahmed Samy, Amira Eid Salem
BACKGROUND: Both pulsed dye laser and combined 585/1,064-nm (sequential dual-wave-length PDL and Nd:YAG) laser improves inflammatory skin disorders including acne vulgaris. OBJECTIVE: To compare the efficacy of 585 nm pulsed dye laser versus sequential dual-wave-length PDL and Nd:YAG in treatment of acne vulgaris. PATIENTS AND METHOD: Thirty patients complaining of acne vulgaris were treated with a single pass of PDL alone on half of the face and a single pass of combined 585/1064-nm laser on the other half for four treatment sessions at 2 weeks interval, then assessed by the count and severity of the acne lesions & digital camera photographs Results: The study showed that inflammatory acne lesions count was significantly reduced by 82...
December 2, 2016: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/27910611/fast-sweep-direct-absorption-sub-millimeter-wave-spectroscopy
#14
Brian M Hays, Morgan N McCabe, Steven T Shipman, Susanna L Widicus Weaver
Direct absorption spectroscopy has been the mainstay for spectral acquisition in the millimeter and submillimeter wavelength regimes because of the sensitivity offered by standard hot electron bolometer detectors. However, this approach is limited in its utility because of the slow spectral acquisition speeds. A few rapid acquisition techniques that offer reasonable levels of sensitivity have been developed, but these rely on specialized and costly equipment. We present here a new instrument design for a (sub)millimeter spectrometer that offers both rapid spectral acquisition and highly sensitive detection while using equipment from existing chirped-pulse Fourier transform spectrometers and direct absorption spectrometers...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910551/x-ray-analysis-of-electron-bernstein-wave-heating-in-mst
#15
A H Seltzman, J K Anderson, A M DuBois, A Almagri, C B Forest
A pulse height analyzing x-ray tomography system has been developed to detect x-rays from electron Bernstein wave heated electrons in the Madison symmetric torus reversed field pinch (RFP). Cadmium zinc telluride detectors are arranged in a parallel beam array with two orthogonal multi-chord detectors that may be used for tomography. In addition a repositionable 16 channel fan beam camera with a 55° field of view is used to augment data collected with the Hard X-ray array. The chord integrated signals identify target emission from RF heated electrons striking a limiter located 12° toroidally away from the RF injection port...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910476/operation-results-of-the-kstar-far-infrared-interferometer
#16
June-Woo Juhn, K C Lee, H M Wi, Y S Kim, Y U Nam
The 2015 KSTAR experimental campaign was the first year of routine measurement with a far infrared interferometer (FIRI) utilizing 118.87 μm CH3OH lasers at maximum 200 mW CW beam power. By using rtEFIT reconstruction, the path lengths of interferometers can be calculated and so the line-averaged electron densities n¯e from the FIRI and a millimeter-wave interferometer were in excellent agreement. In this way, the number of successfully diagnosed discharges is counted: 1003 shots or 83.7% of sustained discharges, defined as shots of plasma current IP ≥ 0...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910434/experiments-of-a-monolithic-radial-transmission-line
#17
C Mao, X Wang, X Zou, J Lehr
This paper presents the experimental results of a monolithic radial transmission line (MRTL) that may be used in pulsed power generators and microwave devices. The MRTL with a hyperbolic impedance profile is 508 mm in radius, corresponding to a one-way transit time of 15 ns for the electromagnetic wave. In the experiments, up to twenty identical voltage pulses, 10 ns in FWHM and 2 ns in rise-time, were fed into the MRTL through 20 input BNC connectors that are uniformly distributed along the outer circumference of the MRTL...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910346/initial-measurements-of-plasma-current-and-electron-density-profiles-using-a-polarimeter-interferometer-point-for-long-pulse-operation-in-east-invited
#18
H Q Liu, J P Qian, Y X Jie, W X Ding, D L Brower, Z Y Zou, W M Li, H Lian, S X Wang, Y Yang, L Zeng, T Lan, Y Yao, L Q Hu, X D Zhang, B N Wan
A double-pass, radially viewing, far-infrared laser-based POlarimeter-INTerferometer (POINT) system utilizing the three-wave technique has been implemented for diagnosing the plasma current and electron density profiles in the Experimental Advanced Superconducting Tokamak (EAST). POINT has been operated routinely during the most recent experimental campaign and provides continuous 11 chord line-integrated Faraday effect and density measurement throughout the entire plasma discharge for all heating schemes and all plasma conditions (including ITER relevant scenario development)...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910005/doppler-images-of-intra-pulmonary-shunt-within-atelectasis-in-anesthetized-children
#19
Cecilia M Acosta, Gerardo Tusman, Mauro Costantini, Camila Echevarría, Sergio Pollioto, Diego Abrego, Fernando Suarez-Sipmann, Stephan H Böhm
BACKGROUND: Doppler images of pulmonary vessels in pulmonary diseases associated with subpleural consolidations have been described. Color Doppler easily identifies such vessels within consolidations while spectral Doppler analysis allows the differentiation between pulmonary and bronchial arteries. Thus, Doppler helps in diagnosing the nature of consolidations. To our knowledge, Doppler analysis of pulmonary vessels within anesthesia-induced atelectasis has never been described before...
December 2016: Critical Ultrasound Journal
https://www.readbyqxmd.com/read/27908892/resting-heart-rate-trajectory-pattern-predicts-arterial-stiffness-in-a-community-based-chinese-cohort
#20
Shuhua Chen, Weijuan Li, Cheng Jin, Anand Vaidya, Jingli Gao, Hui Yang, Shouling Wu, Xiang Gao
OBJECTIVE: To examine whether the long-term resting heart rate (RHR) pattern can predict the risk of having arterial stiffness in a large ongoing cohort study. APPROACH AND RESULTS: This community-based cohort included 12 554 participants in the Kailun study, who were free of myocardial infarction, stroke, arrhythmia, and cancer. We used latent mixture modeling to identify RHR trajectories in 2006, 2008, and 2010. We used multivariate linear regression model to examine the association between RHR trajectory patterns and the risk of having arterial stiffness, which was assessed by brachial-ankle pulse wave velocity in 2010 to 2016...
December 1, 2016: Arteriosclerosis, Thrombosis, and Vascular Biology
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