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https://www.readbyqxmd.com/read/27935546/shear-wave-elastography-of-the-testes-in%C3%A2-a%C3%A2-healthy-study-collective-differences-in%C3%A2-standard-values-between-arfi-and%C3%A2-vtiq%C3%A2-techniques
#1
J Marcon, M Trottmann, J Rübenthaler, C G Stief, M F Reiser, D A Clevert
INTRODUCTION: Shear wave elastography (SWE) is a recent technique in the assessment of tissue elasticity. Different elastography techniques have been described over the years.Acoustic Radiation Force Impulse Imaging (ARFI) uses mechanical excitation of tissue to create detectable shear waves, a higher shear wave velocity being associated with an increased tissue stiffness.The Virtual Touch Tissue Imaging Quantification (VTIQ) method uses a mechanical push pulse as well, additionally creating a colour-coded map, in which tissue stiffness can be measured on the stored map on the ultrasound device after measurement...
December 8, 2016: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/27935240/effects-of-liraglutide-on-cardiovascular-risk-factors-in-patients-with-type-1-diabetes
#2
Thomas F Dejgaard, Nanna B Johansen, Christian S Frandsen, Ali Asmar, Lise Tarnow, Filip K Knop, Sten Madsbad, Henrik U Andersen
We investigated the short-term effect of adding liraglutide 1.8 mg once daily to insulin treatment on cardiovascular risk factors in patients with type 1 diabetes. In total, 100 overweight (BMI ≥25 kg/m(2) ) adult patients (age ≥18 years) with type 1 diabetes and HbA1c ≥8% (64 mmol/mol) were randomised to liraglutide 1.8 mg or placebo added to insulin treatment in a 24-week double-blinded, placebo-controlled trial. At baseline and after 24 weeks of treatment, 24-h blood pressure and heart rate, pulse pressure, pulse wave velocity, and carotid intima-media thickness were evaluated...
December 9, 2016: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/27932672/a-led-based-phosphorimeter-for-measurement-of-microcirculatory-oxygen-pressure
#3
Philippe Guerci, Yasin Ince, Paul Heeman, Dirk J Faber, Bulent Ergin, Can Ince
Quantitative measurements of microcirculatory and tissue oxygenation are of prime importance in experimental research. Non-invasive time-resolved quenching of phosphorescence has given further insight into the fundamental mechanisms of oxygen transport to healthy tissues and in models of disease. Phosphorimeters are devices dedicated to the study of phosphorescence quenching. The experimental applications of phosphorimeters range from measuring a specific oxygen partial pressure (PO2) in cellular organelles such as mitochondria, finding values of PO2 distributed over an organ or capillaries, to measuring microcirculatory PO2 changes simultaneously in several organ systems...
December 8, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/27930582/renal-volume-and-cardiovascular-risk-assessment-in-normotensive-autosomal-dominant-polycystic-kidney-disease-patients
#4
Laia Sans, Julio Pascual, Aleksandar Radosevic, Claudia Quintian, Mireia Ble, Lluís Molina, Sergi Mojal, José A Ballarin, Roser Torra, Patricia Fernández-Llama
Cardiovascular disease, closely related to an early appearance of hypertension, is the most common mortality cause among autosomal dominant polycystic kidney disease patients (ADPKD). The development of hypertension is related to an increase in renal volume. Whether the increasing in the renal volume before the onset of hypertension leads to a major cardiovascular risk in ADPKD patients remains unknown.Observational and cross-sectional study of 62 normotensive ADPKD patients with normal renal function and a group of 28 healthy controls...
December 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27930439/loss-of-pulse-pressure-amplification-between-the-ascending-and-descending-aorta-in-patients-after-an-aortic-arch-repair
#5
Tomoaki Murakami, Masahiro Shiraishi, Tomohiro Nawa, Atsuhito Takeda
INTRODUCTION: One of the most important problems in patients with an aortic coarctation after an aortic arch repair is future cardiovascular disease. We previously reported the enhancement of the aortic pressure wave reflection in patients and hypothesized that the enhancement was caused by a new pressure wave reflection generated from the repaired site. To prove the hypothesis, we analyzed the pressure waveform in the ascending and descending aorta and examined their pulse pressure (PP) amplification...
December 7, 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27929036/optimal-generation-of-spatially-coherent-soft-x-ray-isolated-attosecond-pulses-in-a-gas-filled-waveguide-using-two-color-synthesized-laser-pulses
#6
Cheng Jin, Kyung-Han Hong, C D Lin
We numerically demonstrate the generation of intense, low-divergence soft X-ray isolated attosecond pulses in a gas-filled hollow waveguide using synthesized few-cycle two-color laser waveforms. The waveform is a superposition of a fundamental and its second harmonic optimized such that highest harmonic yields are emitted from each atom. We then optimize the gas pressure and the length and radius of the waveguide such that bright coherent high-order harmonics with angular divergence smaller than 1 mrad are generated, for photon energy from the extreme ultraviolet to soft X-rays...
December 8, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27928454/the-role-of-oral-sodium-bicarbonate-supplementation-in-maintaining-acid-base-balance-and-its-influence-on-the-cardiovascular-system-in-chronic-hemodialysis-patients-results-of-a-prospective-study
#7
Voiculeț C, Zară O, Bogeanu C, Văcăroiu I, Aron G
Background: Major acid-base variations during dialysis and the imbalances in serum calcium levels intensified by them play a role in cardiovascular damage of hemodialysis patients. Early vascular walls modifications can be objectified by determining the pulse wave velocity (PWV) - a marker of vascular stiffness that is associated with increased risk of cardiovascular events. Material and methods: This was a prospective study conducted on 63 chronic hemodialysis patients with diuresis above 500 mL/ 24 hours and predialysis blood pressure below 160 mmHg (treatment controlled) randomized in two groups for 12 months - the study group receiving interdialitic oral sodium bicarbonate doses and control group, without oral sodium bicarbonate supplementation, but receiving higher bicarbonate prescriptions in dialysis...
October 2016: Journal of Medicine and Life
https://www.readbyqxmd.com/read/27928151/evaluation-of-arterial-stiffness-and-cardiac-function-in-patients-with-vascular-erectile-dysfunction-acute-effects-of-phosphodiesterase-5-inhibitor-tadalafil
#8
O Özdabakoğlu, S Güllülü, S Sağ, T Şentürk, H Kiliçarslan, A Tütüncü, M Keçebaş, I Baran, A Aydinlar
This study aimed to detect endothelial dysfunction in erectile dysfunction (ED) patients free from cardiovascular diseases or atherosclerotic risk factors and to evaluate acute effects of phosphodiesterase-5 inhibitor tadalafil on endothelial dysfunction and cardiac function. Thirty ED patients and 20 healthy male subjects (mean ages: 48.7±11.7 and 48.3±8.7 years, respectively) were enrolled. Endothelium functions were assessed by applanation tonometry. Aortic stiffness and cardiac function were evaluated by transthoracic echocardiography...
December 8, 2016: International Journal of Impotence Research
https://www.readbyqxmd.com/read/27927630/inactive-matrix-gla-protein-and-arterial-stiffness-in-type-2-diabetes-mellitus
#9
Mayank Sardana, Izzah Vasim, Swapna Varakantam, Uzma Kewan, Ali Tariq, Maheshwara R Koppula, Amer Ahmed Syed, Melissa Beraun, Nadja E A Drummen, Cees Vermeer, Scott R Akers, Julio A Chirinos
BACKGROUND: Large artery stiffness is increased in diabetes mellitus and causes an excessive pulsatile load to the heart and to the microvasculature. The identification of pathways related to arterial stiffness may provide novel therapeutic targets to ameliorate arterial stiffness in diabetes. Matrix Gla-Protein (MGP) is an inhibitor of vascular calcification. Activation of MGP is vitamin K dependent. We hypothesized that levels of inactive MGP (dephospho-uncarboxylated MGP; dp-ucMGP) are related to arterial stiffness in type 2 diabetes...
December 7, 2016: American Journal of Hypertension
https://www.readbyqxmd.com/read/27927629/central-haemodynamics-and-prediction-of-cardiovascular-events-in-patients-with-erectile-dysfunction
#10
Charalambos Vlachopoulos, Nikolaos Ioakeimidis, Konstantinos Rokkas, Athanassios Angelis, Dimitrios Terentes-Printzios, Zisis Kratiras, Christos Georgakopoulos, Dimitrios Tousoulis
BACKGROUND: We investigated whether central hemodynamics predict major adverse cardiovascular events (MACEs) in erectile dysfunction (ED) patients beyond traditional risk factors. METHODS: MACEs in relation to aortic pressures and augmentation index (AIx) were analyzed in 398 patients (mean age, 56 years) with ED but without established cardiovascular (CV) disease. RESULTS: During the mean follow-up period of 6.5 years, a total of 29 (6.5%) MACEs occurred...
December 7, 2016: American Journal of Hypertension
https://www.readbyqxmd.com/read/27926755/surface-area-of-detachment-proliferative-vitreoretinopathy-and-pulse-pressure-but-not-ages-are-associated-with-retinal-redetachment
#11
Bernardina T Fokkens, Douwe J Mulder, Michiel B Nugteren, Casper G Schalkwijk, Jean L Scheijen, Andries J Smit, Leonoor I Los
Purpose: Advanced glycation endproducts (AGEs) have been suggested to play a role in retinal redetachment by promoting proliferative vitreoretinopathy (PVR). The purpose of this study was to investigate whether AGEs, in combination with other clinical characteristics, were able to identify patients at high risk for redetachment after vitrectomy for rhegmatogenous retinal detachment (RRD). Methods: In this prospective cohort study, 410 RRD patients were included...
December 1, 2016: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/27925730/intrinsic-ferromagnetism-in-the-diluted-magnetic-semiconductor-co-tio_-2
#12
H Saadaoui, X Luo, Z Salman, X Y Cui, N N Bao, P Bao, R K Zheng, L T Tseng, Y H Du, T Prokscha, A Suter, T Liu, Y R Wang, S Li, J Ding, S P Ringer, E Morenzoni, J B Yi
Here we present a study of magnetism in Co_{0.05}Ti_{0.95}O_{2-δ} anatase films grown by pulsed laser deposition under a variety of oxygen partial pressures and deposition rates. Energy-dispersive spectrometry and transmission electron microscopy analyses indicate that a high deposition rate leads to a homogeneous microstructure, while a very low rate or postannealing results in cobalt clustering. Depth resolved low-energy muon spin rotation experiments show that films grown at a low oxygen partial pressure (≈10^{-6}  torr) with a uniform structure are fully magnetic, indicating intrinsic ferromagnetism...
November 25, 2016: Physical Review Letters
https://www.readbyqxmd.com/read/27924959/effects-of-ramadan-fasting-on-body-composition-and-arterial-stiffness
#13
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
#14
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
#15
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/27923782/comparing-arterial-function-parameters-for-the-prediction-of-coronary-heart-disease-events-the-multi-ethnic-study-of-atherosclerosis-mesa
#16
Elizabeth K Hom, Daniel A Duprez, David R Jacobs, David A Bluemke, Lyndia C Brumback, Joseph F Polak, Carmen A Peralta, Philip Greenland, Sheryl L Magzamen, João A C Lima, Alban Redheuil, David M Herrington, James H Stein, Dhananjay Vaidya, Pamela Ouyang, Joel D Kaufman
Arterial dysfunction has been linked to decline in cardiac function and increased risk of cardiovascular disease events. We calculated the value of arterial function, measured at baseline (2000-2002), in predicting time to first coronary heart disease (CHD) event (median follow-up, 10.2 years) among participants in the Multi-Ethnic Study of Atherosclerosis (MESA). Measures included the following: C1 and C2, derived from diastolic pulse contour analysis from the radial artery blood pressure waveform obtained by tonometry (n = 6,336); carotid distensibility and Young's elastic modulus at the carotid artery, derived from carotid artery ultrasonography (n = 6,531 and 6,528); and aortic distensibility, measured using cardiac magnetic resonance imaging (n = 3,677)...
December 6, 2016: American Journal of Epidemiology
https://www.readbyqxmd.com/read/27922879/the-changes-in-pulse-pressure-variation-or-stroke-volume-variation-after-a-tidal-volume-challenge-reliably-predict-fluid-responsiveness-during-low-tidal-volume-ventilation
#17
Sheila Nainan Myatra, Natesh R Prabu, Jigeeshu Vasishtha Divatia, Xavier Monnet, Atul Prabhakar Kulkarni, Jean-Louis Teboul
OBJECTIVES: Stroke volume variation and pulse pressure variation do not reliably predict fluid responsiveness during low tidal volume ventilation. We hypothesized that with transient increase in tidal volume from 6 to 8 mL/kg predicted body weight, that is, "tidal volume challenge," the changes in pulse pressure variation and stroke volume variation will predict fluid responsiveness. DESIGN: Prospective, single-arm study. SETTING: Medical-surgical ICU in a university hospital...
December 5, 2016: Critical Care Medicine
https://www.readbyqxmd.com/read/27922547/changes-in-stroke-volume-induced-by-lung-recruitment-maneuver-predict-fluid-responsiveness-in-mechanically-ventilated-patients-in-the-operating-room
#18
Matthieu Biais, Romain Lanchon, Musa Sesay, Lisa Le Gall, Bruno Pereira, Emmanuel Futier, Karine Nouette-Gaulain
BACKGROUND: Lung recruitment maneuver induces a decrease in stroke volume, which is more pronounced in hypovolemic patients. The authors hypothesized that the magnitude of stroke volume reduction through lung recruitment maneuver could predict preload responsiveness. METHODS: Twenty-eight mechanically ventilated patients with low tidal volume during general anesthesia were included. Heart rate, mean arterial pressure, stroke volume, and pulse pressure variations were recorded before lung recruitment maneuver (application of continuous positive airway pressure of 30 cm H2O for 30 s), during lung recruitment maneuver when stroke volume reached its minimal value, and before and after volume expansion (250 ml saline, 0...
December 5, 2016: Anesthesiology
https://www.readbyqxmd.com/read/27920215/plasma-nt-probnp-mirrors-the-deleterious-cardiovascular-and-renal-continuum-in-hypertension
#19
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/27920131/maternal-urinary-bisphenol-a-concentration-during-midterm-pregnancy-and-children-s-blood-pressure-at-age-4
#20
Sanghyuk Bae, Youn-Hee Lim, Young Ah Lee, Choong Ho Shin, Se-Young Oh, Yun-Chul Hong
Bisphenol A (BPA) has been reported to be associated with adverse health effects, including high blood pressure (BP). BPA is also suspected to cross placenta in pregnancy and might affect children's health. The present study was aimed to evaluate the effect of prenatal exposure to BPA on the BP of the child at the age of 4. We followed up 645 children at the age of 4 who were born from women who participated midterm during their pregnancy in a birth cohort study from August 2008 to July 2011. Because BPA and BP showed nonlinear association, we constructed a piecewise regression model to examine the association between urinary BPA concentration of mother at around 20 weeks of gestation and BP of the child at age 4 and to determine threshold level of BPA for the association...
December 5, 2016: Hypertension
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