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https://www.readbyqxmd.com/read/28531895/arterial-stiffness-is-an-independent-risk-factor-for-anemia-after-percutaneous-native-kidney-biopsy
#1
Keiko Tanaka, Masashi Kitagawa, Akifumi Onishi, Toshio Yamanari, Ayu Ogawa-Akiyama, Koki Mise, Tatsuyuki Inoue, Hiroshi Morinaga, Haruhito A Uchida, Hitoshi Sugiyama, Jun Wada
BACKGROUND/AIMS: Bleeding is the most common complication after renal biopsy. Although numerous predictors of bleeding have been reported, it remains unclear whether arterial stiffness affects bleeding complications. METHOD: We performed an observational study of the renal biopsies performed in our division over an approximately 6-year period (May 2010 to May 2016). The clinical and laboratory factors were analyzed to reveal the risk factors associated with bleeding, with a focus on anemia (defined as a ≥10% decrease in hemoglobin [Hb] after biopsy)...
May 25, 2017: Kidney & Blood Pressure Research
https://www.readbyqxmd.com/read/28530211/-pulse-wave-velocity-as-an-early-marker-of-diastolic-heart-failure-in-patients-with-hypertension
#2
Beata Moczulska, Monika Kubiak, Anna Bryczkowska, Ewa Malinowska
According to the WHO, hypertension is one of the major causes of death worldwide. It leads to a number of severe complications. Diastolic heart failure, that is heart failure with preserved ejection fraction (HFPEF), is especially common. New, but simple, indices for the early detection of patients who have not yet developed complications or are in their early developmental stages are still searched for. AIM: The aim of this study is to examine the correlation between pulse wave velocity (PWV) and markers of diastolic heart failure (DHF) assessed in echocardiography in patients with hypertension and no symptoms of heart failure...
April 21, 2017: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/28528655/pulmonary-flow-as-an-improved-method-for-determining-cardiac-output-in-mice-after-myocardial-infarction
#3
Mathew J Platt, Jason S Huber, Keith R Brunt, Jeremy A Simpson
BACKGROUND: Echocardiography is a valuable noninvasive technique to estimate cardiac output (CO) from the left ventricle (LV) not only in clinical practice but also in small-animal experiments. CO is used to grade cardiac function and is especially important when investigating cardiac injury (e.g., myocardial infarction [MI]). Critically, MI deforms the LV, invalidating the assumptions fundamental to calculating of cardiac volumes directly from the LV. Thus, the purpose of this study was to determine if Doppler-derived blood flow through the pulmonary trunk (pulmonary flow [PF]) was an improved method over conventional LV-dependent echocardiography to accurately determine CO after MI...
June 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/28528401/cardiovascular-disease-biomarkers-are-associated-with-declining-renal-function-in-type-2-diabetes
#4
Sara J Jenks, Bryan R Conway, Stela McLachlan, Wei Leng Teoh, Rachel M Williamson, David J Webb, Paul Welsh, Naveed Sattar, Mark W J Strachan, Jackie F Price
AIMS/HYPOTHESIS: We investigated whether biochemical cardiovascular risk factors and/or markers of subclinical cardiovascular disease were associated with the development of reduced renal function in people with type 2 diabetes. METHODS: A cohort of 1066 Scottish men and women aged 60-74 years with type 2 diabetes from the Edinburgh Type 2 Diabetes Study were followed up for a median of 6.7 years. New-onset reduced renal function was defined as two eGFRs <60 ml(-1) min(-1) (1...
May 20, 2017: Diabetologia
https://www.readbyqxmd.com/read/28528394/a-novel-dual-wavelength-laser-stimulator-to-elicit-transient-and-tonic-nociceptive-stimulation
#5
Xiaoxi Dong, Tianjun Liu, Han Wang, Jichun Yang, Zhuying Chen, Yong Hu, Yingxin Li
This study aimed to develop a new laser stimulator to elicit both transient and sustained heat stimulation with a dual-wavelength laser system as a tool for the investigation of both transient and tonic experimental models of pain. The laser stimulator used a 980-nm pulsed laser to generate transient heat stimulation and a 1940-nm continuous-wave (CW) laser to provide sustained heat stimulation. The laser with 980-nm wavelength can elicit transient pain with less thermal injury, while the 1940-nm CW laser can effectively stimulate both superficial and deep nociceptors to elicit tonic pain...
May 20, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28526782/acute-impact-of-drinking-coffee-on-the-cerebral-and-systemic-vasculature
#6
Takuro Washio, Hiroyuki Sasaki, Shigehiko Ogoh
Previous studies have suggested that the risk of ischemic stroke increases immediately after drinking coffee. Indeed, drinking coffee, that is, caffeine, acutely increases arterial stiffness as well as blood pressure and peripheral vascular resistance. On the other hand, it has been reported that arterial stiffening is associated with elevation in the pulsatility index (PI) of cerebral blood flow (CBF), which increases the risk of brain disease. However, the effect of drinking coffee on the PI of the CBF and its interaction with arterial stiffness remain unknown...
May 2017: Physiological Reports
https://www.readbyqxmd.com/read/28526073/pulse-wave-velocity-and-cardiac-autonomic-function-in-type-2-diabetes-mellitus
#7
Stamatina Chorepsima, Ioanna Eleftheriadou, Anastasios Tentolouris, Ioannis Moyssakis, Athanasios Protogerou, Alexandros Kokkinos, Petros P Sfikakis, Nikolaos Tentolouris
BACKGROUND: Increased carotid-femoral pulse wave velocity (PWV) has been associated with incident cardiovascular disease, independently of traditional risk factors. Cardiac autonomic dysfunction is a common complication of diabetes and has been associated with reduced aortic distensibility. However, the association of cardiac autonomic dysfunction with PWV is not known. In this study we examined the association between cardiac autonomic function and PWV in subjects with type 2 diabetes mellitus...
May 19, 2017: BMC Endocrine Disorders
https://www.readbyqxmd.com/read/28524683/return-to-the-origin-as-a-probe-of-atomic-phase-coherence
#8
Clément Hainaut, Isam Manai, Radu Chicireanu, Jean-François Clément, Samir Zemmouri, Jean Claude Garreau, Pascal Szriftgiser, Gabriel Lemarié, Nicolas Cherroret, Dominique Delande
We report on the observation of the coherent enhancement of the return probability ["enhanced return to the origin" (ERO)] in a periodically kicked cold-atom gas. By submitting an atomic wave packet to a pulsed, periodically shifted, laser standing wave, we induce an oscillation of ERO in time that is explained in terms of a periodic, reversible dephasing in the weak-localization interference sequences responsible for ERO. Monitoring the temporal decay of ERO, we exploit its quantum-coherent nature to quantify the decoherence rate of the atomic system...
May 5, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28524681/phase-shift-in-an-atom-interferometer-due-to-spacetime-curvature-across-its-wave-function
#9
Peter Asenbaum, Chris Overstreet, Tim Kovachy, Daniel D Brown, Jason M Hogan, Mark A Kasevich
Spacetime curvature induces tidal forces on the wave function of a single quantum system. Using a dual light-pulse atom interferometer, we measure a phase shift associated with such tidal forces. The macroscopic spatial superposition state in each interferometer (extending over 16 cm) acts as a nonlocal probe of the spacetime manifold. Additionally, we utilize the dual atom interferometer as a gradiometer for precise gravitational measurements.
May 5, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28524203/time-resolved-photoelectron-spectroscopy-of-ir-driven-electron-dynamics-in-a-charge-transfer-model-system
#10
Mirjam Falge, Friedrich Georg Fröbel, Volker Engel, Stefanie Gräfe
If the adiabatic approximation is valid, electrons smoothly adapt to molecular geometry changes. In contrast, as a characteristic of diabatic dynamics, the electron density does not follow the nuclear motion. Recently, we have shown that the asymmetry in time-resolved photoelectron spectra serves as a tool to distinguish between these dynamics [Falge et al., J. Phys. Chem. Lett., 2012, 3, 2617]. Here, we investigate the influence of an additional, moderately intense infrared (IR) laser field, as often applied in attosecond time-resolved experiments, on such asymmetries...
May 19, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28522299/most-advisable-strategy-in-search-of-asymptomatic-target-organ-damage-in-hypertensive-patients
#11
J Abellán-Huerta, L Prieto-Valiente, L Consuegra-Sánchez, S Montoro-García, A B Salguero-Merino, R Morales-López, J Abellán-Alemán, F Soria-Arcos
OBJECTIVE: To evaluate the diagnostic potential of seven examinations in order to define the most suitable strategy for target organ damage (TOD) search in hypertensive patients. METHODS: This is a descriptive, cross-sectional study. 153 consecutive treated and essential hypertensive patients were enrolled. Patients with established cardiovascular or chronic renal disease (stage ≥4) were excluded. TOD search was assessed by: glomerular filtration rate (GFR), albumin/creatinine ratio (ACR), electrocardiogram (ECG), echocardiogram (ECO), ankle-brachial index (ABI), pulse wave velocity (PWV), and carotid ultrasound (intima media thickness and presence of plaques)...
May 15, 2017: Hipertensión y Riesgo Vascular
https://www.readbyqxmd.com/read/28522117/characterization-of-cu-ii-reconstituted-acc-oxidase-using-experimental-and-theoretical-approaches
#12
Nadia El Bakkali-Tahéri, Sybille Tachon, Maylis Orio, Sylvain Bertaina, Marlène Martinho, Viviane Robert, Marius Réglier, Thierry Tron, Pierre Dorlet, A Jalila Simaan
1-Aminocyclopropane-1-carboxylic acid oxidase (ACCO) is a non heme iron(II) containing enzyme that catalyzes the final step of the ethylene biosynthesis in plants. The iron(II) ion is bound in a facial triad composed of two histidines and one aspartate (H177, D179 and H234). Several active site variants were generated to provide alternate binding motifs and the enzymes were reconstituted with copper(II). Continuous wave (cw) and pulsed Electron Paramagnetic Resonance (EPR) spectroscopies as well as Density Functional Theory (DFT) calculations were performed and models for the copper(II) binding sites were deduced...
May 15, 2017: Archives of Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28522100/pulse-wave-amplitude-reduction-as-a-surrogate-for-cortical-arousal-during-sleep-hypopnea-in-children
#13
Alessandro Amaddeo, Noria Medjahdi, Marta Fernandez-Bolanos, Sonia Khirani, Guillaume Baffet, Brigitte Fauroux
OBJECTIVES: The accuracy of respiratory polygraphy (RP) is limited because of the absence of electroencephalography (EEG). Pulse wave amplitude (PWA) reduction has been shown to be a marker of autonomic activation during arousal, and may represent a substitute for obstructive respiratory-related cortical arousal (RRCA). This study tested the hypothesis that PWA could be a surrogate for RRCA in detecting obstructive hypopnea (OH) in a pediatric population. MATERIALS AND METHODS: Two experienced readers scored 30 consecutive polysomnographies (PSG) using standard scoring rules...
June 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28521772/feasibility-and-relevance-of-compound-strain-imaging-in-non-stenotic-arteries-comparison-between-individuals-with-cardiovascular-diseases-and-healthy-controls
#14
Martijn F H Maessen, Thijs M H Eijsvogels, Ayla Grotens, Maria T E Hopman, Dick H J Thijssen, Hendrik H G Hansen
BACKGROUND: Compound strain imaging is a novel method to noninvasively evaluate arterial wall deformation which has recently shown to enable differentiation between fibrous and (fibro-)atheromatous plaques in patients with severe stenosis. We tested the hypothesis that compound strain imaging is feasible in non-stenotic arteries and provides incremental discriminative power to traditional measures of vascular health (i.e., distensibility coefficient (DC), central pulse wave velocity [cPWV], and intima-media thickness [IMT]) for differentiating between participants with and without a history of cardiovascular diseases (CVD)...
May 18, 2017: Cardiovascular Ultrasound
https://www.readbyqxmd.com/read/28520843/measurement-of-aortic-pulse-wave-velocity-with-a-connected-bathroom-scale
#15
David Campo, Hakim Khettab, Roger Yu, Nicolas Genain, Paul Edouard, Nadine Buard, Pierre Boutouyrie
BACKGROUND: Measurement of arterial stiffness should be more available. Our aim was to show that aortic pulse wave velocity can be reliably measured with a bathroom scale combining the principles of ballistocardiography (BCG) and impedance plethysmography on a single foot. METHOD: The calibration of the bathroom scale was conducted on a group of 106 individuals. The aortic pulse wave velocity was measured with the SphygmoCor in the supine position. Three consecutive measurements were then performed on the Withings scale in the standing position...
May 17, 2017: American Journal of Hypertension
https://www.readbyqxmd.com/read/28518192/time-resolved-signatures-across-the-intramolecular-response-in-substituted-cyanine-dyes
#16
Muath Nairat, Morgan Webb, Michael P Esch, Vadim V Lozovoy, Benjamin G Levine, Marcos Dantus
The optically populated excited state wave packet propagates along multidimensional intramolecular coordinates soon after photoexcitation. This action occurs alongside an intermolecular response from the surrounding solvent. Disentangling the multidimensional convoluted signal enables the possibility to separate and understand the initial intramolecular relaxation pathways over the excited state potential energy surface. Here we track the initial excited state dynamics by measuring the fluorescence yield from the first excited state as a function of time delay between two color femtosecond pulses for several cyanine dyes having different substituents...
May 18, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28515820/arterial-velocity-pulse-index-as-a-novel-marker-of-atherosclerosis-using-pulse-wave-analysis-on-high-sensitivity-troponin-t-in-hypertensive-patients
#17
Takashi Hitsumoto
BACKGROUND: The arterial velocity pulse index (AVI) is explored as a novel marker of atherosclerosis using pulse wave analysis in clinical settings. Recent clinical studies have reported that the level of high-sensitivity troponin T (hs-cTnT) is an important biomarker in hypertensive patients. The aim of this study was to clarify the impact of AVI on hs-cTnT in these patients. METHODS: This study enrolled 455 hypertensive outpatients (181 males and 274 females; mean age, 65 ± 11 years (mean ± standard deviation)) without a history of cardiovascular events...
April 2017: Cardiology Research
https://www.readbyqxmd.com/read/28515119/pulse-wave-velocity-predicts-response-to-renal-denervation-in-isolated-systolic-hypertension
#18
Karl Fengler, Karl-Philipp Rommel, Robert Hoellriegel, Stephan Blazek, Christian Besler, Steffen Desch, Gerhard Schuler, Axel Linke, Philipp Lurz
BACKGROUND: Renal sympathetic denervation seems to be less effective as a treatment for hypertension in patients with isolated systolic hypertension, a condition associated with elevated central arterial stiffness. Because isolated systolic hypertension can also be caused by wave reflection or increased cardiac output, a more differentiated approach might improve patient preselection for renal sympathetic denervation. We sought to evaluate the additional predictive value of invasive pulse wave velocity for response to renal sympathetic denervation in patients with combined versus isolated systolic hypertension...
May 17, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28514871/pulse-wave-velocity-retrospective-analysis-in-a-balkan-normotensive-and-hypertensive-population-a-study-of-9923-patients
#19
Dragan Lovic, Manolis S Kallistratos, Leonidas Poulimenos, Aggelos Skyrlas, V Stojanov, B Jakovljevic, M Zdravkovic, G Koracevic, Eftychia Chamodraka, Nikos Kouremenos, Andreas Pittaras, Peter Kokkinos, Pavlos Tsinivizov, Athanasios Manolis
We compared pulse wave velocity (PWV) between hypertensive patients and control patients to identify demographics and patient characteristics related to PWV. We retrospectively analyzed 9923 participants (3105 controls and 6818 hypertensive patients) from 5 outpatient hypertensive clinics (in Serbia and Greece). Pulse wave velocity had different distribution between controls and hypertensive patients ( P < .001). The magnitude of PWV increase was related to blood pressure (BP) category (from optimal to stage III hypertension; P < ...
January 1, 2017: Angiology
https://www.readbyqxmd.com/read/28513244/different-relationship-between-physical-activity-arterial-stiffness-and-metabolic-status-in-obese-subjects
#20
Hyung Joon Joo, Sang-A Cho, Jae-Young Cho, Seunghun Lee, Jae Hyung Park, Cheol Woong Yu, Soon Jun Hong, Do-Sun Lim
BACKGROUND: Although the relationship between physical activity and arterial stiffness has been shown in healthy persons, it remains controversial in obese persons. METHODS: From January to September 2014, we evaluated 795 obese subjects from 25 public health centers in Seoul. We compared physical activity and brachial-ankle pulse wave velocity (baPWV) between obese subjects with metabolic syndrome (MetS) (MO) and obese subjects without MetS (NMO). RESULTS: The MO group had more men, higher body mass index (BMI), higher fasting glucose level, lower high-density lipoprotein-cholesterol level, and higher triglyceride level...
May 17, 2017: Journal of Physical Activity & Health
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