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Central Pulse Pressure

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https://www.readbyqxmd.com/read/29789692/pulse-pressure-amplification-and-cardiac-autonomic-dysfunction-in-patients-with-type-2-diabetes-mellitus
#1
Ioanna Eleftheriadou, George C Drosos, Anastasios Tentolouris, Konstantonis George, Petros P Sfikakis, Athanasios D Protogerou, Nikolaos Tentolouris
The main aim of this cross-sectional study was to investigate the association between pulse pressure amplification (PPA) and cardiac autonomic activity (baroreflex sensitivity (BRS) and heart rate variability (HRV)) in patients with type 2 diabetes mellitus (T2DM). In addition, we examined the association between cardiac autonomic activity and central hemodynamic parameters that may affect PPA such as augmentation index (AIx), aortic stiffness (pulse wave velocity (PWV)), and common carotid artery stiffness distensibility coefficient (DC)...
May 23, 2018: Journal of Human Hypertension
https://www.readbyqxmd.com/read/29782289/-the-effect-of-changing-of-conventional-antihypertensive-therapy-to-a-triple-fixed-combination-therapy-with-rosuvastatin-in-high-cardiovascular-risk-patients
#2
F T Ageev, Z N Blankova, N S Samsonova
BACKGROUND: The low efficiency of recommended therapy for reducing cardiovascular risk (CV) in patients with arterial hypertension even with an effective blood pressure decrease is often due to the persistence of high blood cholesterol and arterial stiffness. Among the effective ways to achieve the goal of therapy is considered the changing to a single-pill combinations (SPCs) of two antihypertensive drugs and statin. AIM: To assess influence of fixed combination consisted of amlodipine, lisinopril and rosuvastatin to the dynamic of lipid spectrum, blood pressure level and elastic properties of arteries in patients with arterial hypertension and high risk of cardio-vascular complications being transferred from their preceding antihypertensive therapy...
2018: Kardiologiia
https://www.readbyqxmd.com/read/29781581/brain-correlates-of-continuous-pain-in-rheumatoid-arthritis-as-measured-by-pulsed-arterial-spin-labeling
#3
Yvonne C Lee, Alexander Fine, Ekaterina Protsenko, Elena Massarotti, Robert R Edwards, Ishtiaq Mawla, Vitaly Napadow, Marco L Loggia
OBJECTIVE: Central nervous system pathways involving pain modulation shape the pain experience in patients with chronic pain. Our objectives were to understand the mechanisms underlying pain in rheumatoid arthritis (RA) and identify brain signals that may serve as imaging markers for developing targeted treatments for RA pain. METHODS: Subjects with RA and matched controls underwent functional magnetic resonance imaging, using pulsed arterial spin labeling (pASL)...
May 21, 2018: Arthritis Care & Research
https://www.readbyqxmd.com/read/29779091/two-years-of-maintenance-hemodialysis-has-a-pronounced-effect-on-arterial-stiffness-progression
#4
Agne Laucyte-Cibulskiene, Laurynas Rimsevicius, Liutauras Gumbys, Dileta Valanciene, Marius Miglinas
BACKGROUND: The change of aortic stiffness, but not the particular baseline value, plays a crucial role in estimating the patient risk with end-stage renal disease. Therefore, we aimed to analyze the evolution of central and peripheral arterial stiffness in hemodialysis population without previous cardiovascular events during a 2-year follow-up. METHODS: 60 hemodialysis patients (mean age 57.61 ± 13.01 years) were prospectively interviewed, and they underwent blood tests, chest X-ray for aortic calcification evaluation and pulse wave velocity (PWV) measurements at the baseline, after 6 months and after 2 years of observation period...
May 19, 2018: Aging Clinical and Experimental Research
https://www.readbyqxmd.com/read/29771944/intraocular-pressure-and-its-normal-range-adjusted-for-ocular-and-systemic-parameters-the-beijing-eye-study-2011
#5
Ya Xing Wang, Liang Xu, Wen Bin Wei, Jost B Jonas
PURPOSE: To examine the distribution of intraocular pressure (IOP) in a normal population and the associations of IOP with other ocular and systemic parameters. METHODS: Out of 3468 participants of the population-based cross-sectional Beijing Eye Study 2011 we selected those individuals without glaucomatous optic neuropathy. The study particpants underwent a detailed ophthalmologic and systemic examination. IOP was measured by air puff non-contact tonometry. RESULTS: The study included 3135 eyes of 3135 participants with a mean age of 64...
2018: PloS One
https://www.readbyqxmd.com/read/29763910/different-relevance-of-peripheral-central-or-nighttime-blood-pressure-measurements-in-the-prediction-of-chronic-kidney-disease-progression-in-patients-with-mild-or-no-proteinuria
#6
Piotr Kuczera, Katarzyna Kwiecień, Marcin Adamczak, Teresa Bączkowska, Jolanta Gozdowska, Katarzyna Madziarska, Hanna Augustyniak-Bartosik, Marian Klinger, Magdalena Durlik, Eberhard Ritz, Andrzej Wiecek
BACKGROUND/AIMS: Arterial hypertension is one of the leading factors aggravating the course of chronic kidney disease (CKD). It seems that the novel parameters used in the assessment of the blood pressure (BP) load (i.e. central blood pressure, nighttime blood pressure) may be more precise in predicting the cardiovascular risk and the progression of CKD in comparison with the traditional peripheral blood pressure measurements in the office conditions. The aim of the study was to assess the impact of the central, or nighttime blood pressure on the progression of CKD in patients with mild or no-proteinuria (autosomal, dominant polycystic kidney disease or IgA nephropathy)...
May 10, 2018: Kidney & Blood Pressure Research
https://www.readbyqxmd.com/read/29761089/association-of-haemodynamic-indices-of-central-and-peripheral-pressure-with-subclinical-target-organ-damage
#7
Junli Zuo, Shaoli Chu, Isabella Tan, Mark Butlin, Jiehui Zhao, Alberto Avolio
Background: Central aortic pressure has often been shown to be more closely associated with markers of vascular function and incidence of cardiovascular events compared to peripheral pressure. However, the potential clinical use of central aortic or peripheral haemodynamic indices as markers of target organ damage (TOD) has not been fully established. Methods: We evaluated associations of TOD with central aortic and peripheral haemodynamic indices (central aortic [cPP] and peripheral pulse pressure [pPP], central aortic augmentation index, and central and peripheral waveform factor) in 770 hospital inpatients (age 60 ± 10 years, 473 males) with primary hypertension...
March 2018: Pulse (Basel, Switzerland)
https://www.readbyqxmd.com/read/29760461/arterial-stiffness-not-systolic-blood-pressure-increases-with-age-in-native-papuan-populations
#8
Akio Ishida, Michiko Fujisawa, Eva Garcia Del Saz, Kiyohito Okumiya, Yumi Kimura, Indrajaya Ida Bagus Manuaba, Marthen Ferry Kareth, Andreas Lallo Rantetampang, Yusuke Ohya, Kozo Matsubayashi
Systolic blood pressure (SBP) and arterial stiffness are closely related and may behave reciprocally as cause or effect, interacting in a vicious cycle. Both SBP and arterial stiffness increase with age in populations in most developed countries. However, the age-related increase in SBP appears to be absent in indigenous populations, partially because of their lifelong low-sodium and high-potassium diets, whereas age-related arterial stiffening in these populations remains to be determined. We performed a field survey of the indigenous population of Soroba, a small village located in the central highlands of Papua, Indonesia...
May 14, 2018: Hypertension Research: Official Journal of the Japanese Society of Hypertension
https://www.readbyqxmd.com/read/29754316/compromised-mechanical-homeostasis-in-arterial-aging-and-associated-cardiovascular-consequences
#9
J Ferruzzi, D Madziva, A W Caulk, G Tellides, J D Humphrey
Aging leads to central artery stiffening and associated hemodynamic sequelae. Because healthy arteries exhibit differential geometry, composition, and mechanical behaviors along the central vasculature, we sought to determine whether wall structure and mechanical function differ across five vascular regions-the ascending and descending thoracic aorta, suprarenal and infrarenal abdominal aorta, and common carotid artery-in 20 versus 100-week-old male wild-type mice. Notwithstanding generally consistent changes across these regions, including a marked thickening of the arterial wall, diminished in vivo axial stretch, and loss of elastic energy storage capacity, the degree of changes tended to be slightly greater in abdominal than in thoracic or carotid vessels...
May 12, 2018: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/29745800/interaction-between-graviception-and-carotid-baroreflex-function-in-humans-during-parabolic-flight-induced-microgravity
#10
Shigehiko Ogoh, Michaël Marais, Romain Lericollais, Pierre Denise, Peter B Raven, Hervé Normand
The aim of the present study was to assess carotid baroreflex (CBR) during acute changes in otolithic activity in humans. To address this question, we designed a set of experiments to identify the modulatory effects of microgravity on CBR function at a tilt angle of -2{degree sign}, which was identified to minimize changes in central blood volume during parabolic flight. During parabolic flight at 0g and 1g, CBR function curves were modelled from the heart rate (HR) and mean arterial pressure (MAP) responses to rapid pulse trains of neck pressure (NP) and neck suction (NS) ranging from +40 to -80 Torr; CBR control of HR (carotid-HR) and MAP (carotid-MAP) baroreflex function curves, respectively...
May 10, 2018: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29744617/cardiac-magnetic-resonance-assessment-of-central-and-peripheral-vascular-function-in-patients-undergoing-renal-sympathetic-denervation-as-predictor-for-blood-pressure-response
#11
Karl Fengler, Karl-Philipp Rommel, Stephan Blazek, Maximilian Von Roeder, Christian Besler, Christian Lücke, Matthias Gutberlet, Jennifer Steeden, Michael Quail, Steffen Desch, Holger Thiele, Vivek Muthurangu, Philipp Lurz
BACKGROUND: Most trials regarding catheter-based renal sympathetic denervation (RDN) describe a proportion of patients without blood pressure response. Recently, we were able to show arterial stiffness, measured by invasive pulse wave velocity (IPWV), seems to be an excellent predictor for blood pressure response. However, given the invasiveness, IPWV is less suitable as a selection criterion for patients undergoing RDN. Consequently, we aimed to investigate the value of cardiac magnetic resonance (CMR) based measures of arterial stiffness in predicting the outcome of RDN compared to IPWV as reference...
May 9, 2018: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/29741656/differences-in-pressure-within-the-sac-of-human-ruptured-and-nonruptured-cerebral-aneurysms
#12
Yiping Li, Mark Corriveau, Beverly Aagaard-Kienitz, Azam Ahmed, David Niemann
BACKGROUND: Hemodynamics plays a critical role in the development, growth, and rupture of intracranial aneurysms. This data could be vital in determining individual aneurysm rupture risk and could facilitate our understanding of aneurysms. OBJECTIVE: To present the largest prospective cross-sectional cohort study of intrasaccular pressure recordings of ruptured and nonruptured intracranial aneurysms and describe the hemodynamic differences that exist between ruptured and nonruptured aneurysms...
May 8, 2018: Neurosurgery
https://www.readbyqxmd.com/read/29739795/effect-of-wave-reflection-and-arterial-stiffness-on-the-risk-of-development-of-hypertension-in-japanese-men
#13
Hirofumi Tomiyama, Shunsuke Komatsu, Kazuki Shiina, Chisa Matsumoto, Kazutaka Kimura, Masatsune Fujii, Lisa Takahashi, Taishiro Chikamori, Akira Yamashina
BACKGROUND: We conducted analyses of repeated-measures data to examine whether pressure wave reflection acts additively or synergistically with arterial stiffness in the pathogenesis of hypertension. METHODS AND RESULTS: In 3172 middle-aged (42±9 years) healthy Japanese men without hypertension at the study baseline, systolic and diastolic blood pressures, brachial-ankle pulse wave velocity, and radial augmentation index were measured annually during a 9-year study period...
May 8, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29721645/midazolam-increases-preload-dependency-during-endotoxic-shock-in-rabbits-by-affecting-venous-vascular-tone
#14
Jianxiao Chen, Tao Yu, Federico Longhini, Xiwen Zhang, Songqiao Liu, Ling Liu, Yi Yang, Haibo Qiu
BACKGROUND: Septic patients often require sedation in intensive care unit, and midazolam is one of the most frequently used sedatives among them. But the interaction between midazolam and septic shock is not known. The aim of this study is to investigate the effects of midazolam on preload dependency in an endotoxic shock model by evaluating systemic vascular tone and cardiac function. METHODS: Eighteen rabbits were randomly divided into three groups: Control group, MID1 group and MID2 group...
May 2, 2018: Annals of Intensive Care
https://www.readbyqxmd.com/read/29720100/association-of-arterial-stiffness-and-central-hemodynamics-with-moderately-reduced-glomerular-filtration-rate-in-chinese-middle-aged-and-elderly-community-residents-a-cross-sectional-analysis
#15
Shihui Fu, Yi Guo, Leiming Luo, Ping Ye
BACKGROUND: Kidney impairment constitutes severe risk for cardiovascular disease, stroke and all-cause mortality, and early identification and prevention of kidney impairment is critical to effective management of prognostic risk in community residents. Previous studies have validated that carotid-femoral pulse wave velocity (cfPWV) is a significant factor associated with chronic kidney disease. However, whether cfPWV is associated with moderately reduced glomerular filtration rate (GFR) remains unclear...
May 2, 2018: BMC Nephrology
https://www.readbyqxmd.com/read/29717392/arterial-distensibility-physical-activity-and-the-metabolic-syndrome
#16
REVIEW
Francesca Saladini, Paolo Palatini
PURPOSE OF REVIEW: Metabolic syndrome (MetS), a cluster of risk factors including central obesity, metabolic abnormalities, and arterial hypertension, is a well-known determinant of arterial wall remodeling and stiffening. The mechanisms whereby MetS promotes arterial stiffening include increased sympathetic activity with the associated fast heart rate, enhanced activity of the renin-angiotensin-aldosterone system, increased production of inflammatory cytokines and reactive oxygen species, and reduction of nitric oxide availability...
May 1, 2018: Current Hypertension Reports
https://www.readbyqxmd.com/read/29716309/characterization-of-a-medium-sized-washer-gun-for-an-axisymmetric-mirror
#17
Hongshen Yi, Ming Liu, Peiyun Shi, Zhida Yang, Guanghui Zhu, Quanming Lu, Xuan Sun
A new medium-sized washer gun is developed for a plasma start-up in a fully axisymmetric mirror. The gun is positioned at the east end of the Keda Mirror with AXisymmetricity facility and operated in the pulsed mode with an arc discharging time of 1.2 ms and a typical arc current of 8.5 kA with 1.5 kV discharge voltage. To optimize the operation, a systematic scan of the neutral pressure, the arc voltage, the bias voltage on a mesh grid 6 cm in front of the gun and an end electrode located on the west end of mirror, and the mirror ratio was performed...
April 2018: Review of Scientific Instruments
https://www.readbyqxmd.com/read/29687672/volume-expansion-and-variation-in-hemodynamic-parameters
#18
Frank Daniel Martos-Benítez, Bertha Inés Guzmán-Breff
OBJECTIVES: To assess correlations among variations in hemodynamic parameters during fluid volume loading. MATERIAL AND METHODS: Prospective observational study in 2 intensive care units. Sixty patients requiring intravenous fluids underwent challenge tests with 300 mL of crystalloids over a 48-hour period. Percent change in hemodynamic parameters after infusion was measured. We used hierarchical cluster and principal component analyses to explore correlations among changes in hemodynamic responses...
June 2018: Emergencias: Revista de la Sociedad Española de Medicina de Emergencias
https://www.readbyqxmd.com/read/29686625/modeling-arterial-pulse-pressure-from-heart-rate-during-sympathetic-activation-by-progressive-central-hypovolemia
#19
Björn J P van Der Ster, Nicolaas H Sperna Weiland, Berend E Westerhof, Wim J Stok, Johannes J van Lieshout
Heart rate (HR) has an impact on the central blood pressure (BP) wave shape and is related to pulse wave velocity and therefore to timing and duration of systole and diastole. This study tested the hypothesis that in healthy subjects both in rest and during sympathetic stimulation the relation between HR and pulse pressure (PP) is described by a linear effect model. Forty-four healthy volunteers were subjected to sympathetic stimulation by continuous lower body negative pressure (LBNP) until the onset of pre-syncopal symptoms...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29684105/aortic-pulse-pressure-does-not-adequately-index-cardiovascular-risk-factor-related-changes-in-aortic-stiffness-and-forward-wave-pressure
#20
Tshegofatso H Motau, Gavin R Norton, Pinhas Sareli, Angela J Woodiwiss
Background: Through the impact of conventional risk factors on arteries, several changes in aortic function contribute to cardiovascular events. It is nevertheless uncertain whether these effects are accurately reflected by changes in central aortic pulse pressure (PPc). We therefore aimed to determine the extent to which relations between modifiable risk factors and aortic function translate into increases in PPc. Methods: In 1232 black South Africans from the South West Township (SOWETO) of Johannesburg, we determined risk factors and aortic function from carotid-femoral pulse wave velocity (PWV) and aortic PPc, forward (Pf) and reflected (backward-Pb) wave pressures (applanation tonometry and SphygmoCor software)...
April 19, 2018: American Journal of Hypertension
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