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https://www.readbyqxmd.com/read/28332510/recent-advances-in-understanding-hypertension-development-in-sub-saharan-africa
#1
REVIEW
A E Schutte, S Botha, C M T Fourie, L F Gafane-Matemane, R Kruger, L Lammertyn, L Malan, C M C Mels, R Schutte, W Smith, J M van Rooyen, L J Ware, H W Huisman
Consistent reports indicate that hypertension is a particularly common finding in black populations. Hypertension occurs at younger ages and is often more severe in terms of blood pressure levels and organ damage than in whites, resulting in a higher incidence of cardiovascular disease and mortality. This review provides an outline of recent advances in the pathophysiological understanding of blood pressure elevation and the consequences thereof in black populations in Africa. This is set against the backdrop of populations undergoing demanding and rapid demographic transition, where infection with the human immunodeficiency virus predominates, and where under and over-nutrition coexist...
March 23, 2017: Journal of Human Hypertension
https://www.readbyqxmd.com/read/28324975/quantification-of-peripheral-and-central-blood-pressure-variability-using-a-time-frequency-method
#2
Z Kouchaki, M Butlin, A Qasem, A P Avolio
Systolic blood pressure variability (BPV) is associated with cardiovascular events. As the beat-to-beat variation of blood pressure is due to interaction of several cardiovascular control systems operating with different response times, assessment of BPV by spectral analysis using the continuous measurement of arterial pressure in the finger is used to differentiate the contribution of these systems in regulating blood pressure. However, as baroreceptors are centrally located, this study considered applying a continuous aortic pressure signal estimated noninvasively from finger pressure for assessment of systolic BPV by a time-frequency method using Short Time Fourier Transform (STFT)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28315847/effects-of-peripherally-and-centrally-applied-ghrelin-on-the-oxidative-stress-induced-by-renin-angiotensin-system-in-a-rat-model-of-renovascular-hypertension
#3
Vivian Boshra, Amr M Abbas
BACKGROUND: Renovascular hypertension (RVH) is a result of renal artery stenosis, which is commonly due to astherosclerosis. In this study, we aimed to clarify the central and peripheral effects of ghrelin on the renin-angiotensin system (RAS) in a rat model of RVH. METHODS: RVH was induced in rats by partial subdiaphragmatic aortic constriction. Experiment A was designed to assess the central effect of ghrelin via the intracerebroventricular (ICV) injection of ghrelin (5 μg/kg) or losartan (0...
March 20, 2017: Journal of Basic and Clinical Physiology and Pharmacology
https://www.readbyqxmd.com/read/28295256/visualization-of-stimulus-specific-heterogeneous-activation-of-individual-vascular-smooth-muscle-cells-in-aortic-tissues
#4
Satoshi Komatsu, Toshio Kitazawa, Mitsuo Ikebe
Intercellular communication among autonomic nerves, endothelial cells (ECs) and vascular smooth muscle cells (VSMCs) plays a central role in an uninterrupted regulation of blood flow through vascular contractile machinery. Impairment of this communication is linked to development of vascular diseases such as hypertension, cerebral/coronary vasospasms, aortic aneurism, and erectile dysfunction. Although the basic concept of the communication as a whole has been studied, the spatiotemporal correlation of ECs/VSMCs in tissues at the cellular level is unknown...
March 11, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28290893/-hronotherapy-aspects-of-efficiency-azilsartan-medoxomil-in-combination-therapy-in-patients-with-hypertension-and-metabolic-syndrome
#5
V V Skibitskiy, A V Fendrikova, D V Sirotenko, A V Skibitskiy
OBJECTIVE: Determination of the effectiveness and safety of different dosing regimens during the day (in the morning or at bedtime) combination therapy including azilsartan medoxomil in patients with essential hypertension and metabolic syndrome (MS). DESIGN AND METHODS: The study included 60 patients with uncontrolled hypertension and MS (age median - 59 (54-65) years). Patients were randomized in two groups: group 1 (n=30) received azilsartan medoxomil 40 mg/day, and indapamide retard 1,5 mg/day in the morning; group 2 (n=30)- azilsartan medoxomoil 40 mg at bedtime and indapamide retard 1,5 mg in the morning...
October 2016: Kardiologiia
https://www.readbyqxmd.com/read/28289784/high-blood-pressure-states-in-children-adolescents-and-young-adults-associate-accelerated-vascular-aging-with-a-higher-impact-in-females-arterial-properties
#6
S Curcio, V García-Espinosa, J M Castro, G Peluso, M Marotta, M Arana, P Chiesa, G Giachetto, D Bia, Yanina Zócalo
The aims of the study were to determine (1) whether the presence of High blood pressure (HBP) states in the youth associate a steeper rate of age-related change in arterial geometrical and wall properties with respect to subjects with no previous cardiovascular risk factor (CRF) exposure, (2) in which parameters and in what magnitude, and (3) the existence of a gender-related difference in the impact of this condition on arterial properties. 300 individuals (mean/range: 15/4-29 years; 133 females) were included...
March 13, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28285473/a-modern-case-series-of-resuscitative-endovascular-balloon-occlusion-of-the-aorta-reboa-in-an-out-of-hospital-combat-casualty-care-setting
#7
Justin D Manley, Benjamin J Mitchell, Joseph J DuBose, Todd E Rasmussen
BACKGROUND: Resuscitative endovascular balloon occlusion of the aorta (REBOA) is used to mitigate bleeding and sustain central aortic pressure in the setting of shock. The ER-REBOA™ catheter is a new REBOA technology, previously reported only in the setting of civilian trauma and injury care. The use of REBOA in an out-of-hospital setting has not been reported, to our knowledge. METHODS: We present a case series of wartime injured patients cared for by a US Air Force Special Operations Surgical Team at an austere location fewer than 3km (5-10 minutes' transport) from point of injury and 2 hours from the next highest environment of care-a Role 2 equivalent...
2017: Journal of Special Operations Medicine: a Peer Reviewed Journal for SOF Medical Professionals
https://www.readbyqxmd.com/read/28285093/associations-of-central-aortic-pressure-and-brachial-blood-pressure-with-flow-mediated-dilatation-in-apparently-healthy-japanese-men-the-circulatory-risk-in-communities-study-circs
#8
Keyang Liu, Renzhe Cui, Ehab S Eshak, Meishan Cui, Jia-Yi Dong, Masahiko Kiyama, Takeo Okada, Akihiko Kitamura, Mitsumasa Umesawa, Kazumasa Yamagishi, Hironori Imano, Tetsuya Ohira, Hiroyasu Iso
BACKGROUND AND AIMS: Endothelial dysfunction is considered the first stage in the development of atherosclerosis and cardiovascular disease, and brachial flow-mediated dilation (FMD) is a measure of endothelial function. It is uncertain which of central systolic aortic pressure (CAP) or brachial systolic blood pressure (SBP) is more strongly associated with FMD. Therefore, we examined the correlations of CAP and SBP with FMD in Japanese men. METHODS: The study subjects comprised 507 male volunteers aged 30-79 years that were residents in two communities under the Circulatory Risk in Communities Study (CIRCS) between 2013 and 2015...
February 27, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28275590/protocol-for-evaluating-the-cardio-ankle-vascular-index-to-predict-cardiovascular-events-in-japan-a-prospective-multicenter-cohort-study
#9
REVIEW
Toru Miyoshi, Hiroshi Ito, Shigeo Horinaka, Kohji Shirai, Jitsuo Higaki, Hajime Orimio
INTRODUCTION: The cardio-ankle vascular index (CAVI) was developed in Japan and is a blood pressure-independent index of arterial stiffness from the origin of the aorta to the ankle. In recent years, it has been studied by many researchers worldwide, and it is strongly anticipated that it will play a role as a predictive factor for arteriosclerotic diseases. The objective of this study was to examine the benefits of using CAVI as a predictor of cardiovascular events in high-risk patients...
January 2017: Pulse (Basel, Switzerland)
https://www.readbyqxmd.com/read/28275226/prediction-of-fluid-responsiveness-based-on-liver-compression-induced-blood-pressure-changes-in-children-after-cardiac-surgery
#10
Ji-Hyun Lee, In-Kyung Song, Eun-Hee Kim, Hee-Soo Kim, Jin-Tae Kim
BACKGROUND: This study evaluated whether liver compression-induced blood pressure changes can predict fluid responsiveness in children after cardiac surgery. METHODS: Children aged < 5 years who were undergoing cardiac surgery were evaluated after the sternum was closed. Before fluid loading, the right upper abdomen was compressed at a pressure of 30 mmHg for 15 seconds and changes in blood pressure waves were recorded. Then, 10 ml/kg of colloid solution was administered...
March 8, 2017: Minerva Anestesiologica
https://www.readbyqxmd.com/read/28269231/hemodynamic-effects-of-synchronizing-an-intra-aortic-vad-in-reverse-rotation-control-with-left-ventricle-a-mock-loop-study
#11
Yaxin Wang, P Alex Smith, Daniel L Timms, Po-Lin Hsu, Richard A McMahon
The IntraVAD is an intra-aortic left ventricular assist device (LVAD) to be located in the ascending aorta. In order to enhance unloading and promote coronary flow for the left ventricle (LV), an operating mechanism, reverse-rotation control (RRc) mode, has been developed for the IntraVAD and tested in vitro in a mock circulation loop (MCL). The RRc mode consists of forward rotation (FR) and reverse rotation (RR). The synchronization between the IntraVAD and the LV was studied to offload the ventricle more effectively and to improve myocardial perfusion...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28256104/haemodynamic-influences-of-bisoprolol-in-hypertensive-middle-aged%C3%A2-men-a%C3%A2-double-blind-randomized-placebo-controlled-cross-over-study
#12
Lauri Suojanen, Antti Haring, Antti Tikkakoski, Jenni K Koskela, Anna M Tahvanainen, Heini Huhtala, Mika Kähönen, Kalle Sipilä, Arttu Eräranta, Jukka T Mustonen, Kari Kivistö, Ilkka H Pörsti
Treatment with beta-blockers appears to show inferior reduction of central versus peripheral blood pressure. We aimed to examine simultaneous changes in central and peripheral blood pressure, vascular resistance, cardiac function and arterial stiffness during beta-blockade. Haemodynamics were investigated after 3 weeks of bisoprolol treatment (5 mg/d) in a double-blind, randomized, placebo-controlled cross-over trial in never-treated 16 Caucasian males with grade I-II primary hypertension using continuous tonometric pulse wave analysis and whole-body impedance cardiography...
March 2, 2017: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28253850/pulmonary-hypertension-attenuates-the-dynamic-preload-indicators-increase-during-experimental-hypovolemia
#13
Juan P Bouchacourt, Juan Riva, Juan C Grignola
BACKGROUND: Pulse pressure (PPV) and stroke volume (SVV) variations may not be reliable in the setting of pulmonary hypertension and/or right ventricular (RV) failure. We hypothesized that RV afterload increase attenuates SVV and PPV during hypovolemia in a rabbit model of pulmonary embolism (PE) secondary to RV dysfunction. METHODS: Seven anesthetized and mechanically ventilated rabbits were studied during four experimental conditions: normovolemia, blood withdrawal, pulmonary embolism and fluid loading of a colloidal solution...
March 3, 2017: BMC Anesthesiology
https://www.readbyqxmd.com/read/28253335/effects-of-age-associated-regional-changes-in-aortic-stiffness-on-human-hemodynamics-revealed-by-computational-modeling
#14
Federica Cuomo, Sara Roccabianca, Desmond Dillon-Murphy, Nan Xiao, Jay D Humphrey, C Alberto Figueroa
Although considered by many as the gold standard clinical measure of arterial stiffness, carotid-to-femoral pulse wave velocity (cf-PWV) averages material and geometric properties over a large portion of the central arterial tree. Given that such properties may evolve differentially as a function of region in cases of hypertension and aging, among other conditions, there is a need to evaluate the potential utility of cf-PWV as an early diagnostic of progressive vascular stiffening. In this paper, we introduce a data-driven fluid-solid-interaction computational model of the human aorta to simulate effects of aging-related changes in regional wall properties (e...
2017: PloS One
https://www.readbyqxmd.com/read/28250414/relationships-between-urinary-electrolytes-excretion-and-central-hemodynamics-and-arterial-stiffness-in-hypertensive-patients
#15
Weizhong Han, Xiao Han, Ningling Sun, Yunchao Chen, Shiliang Jiang, Min Li
High sodium intake plays an important role in the onset and exacerbation of hypertension. However, the relationships between urinary electrolytes excretion and central hemodynamics and between urinary electrolyte excretion and arterial stiffness are still the subject of debate. This study sought to clarify the associations of salt intake with central aortic pressure and arterial stiffness indicators. A total of 431 untreated hypertensive individuals were recruited into the study. Twenty-four-hour urinary samples were collected to measure the excretion of urinary electrolytes...
March 2, 2017: Hypertension Research: Official Journal of the Japanese Society of Hypertension
https://www.readbyqxmd.com/read/28248905/central-aortic-pressure-calibration-a-bridge-too-far
#16
Audrey Adji, Michael F O'Rourke
No abstract text is available yet for this article.
April 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28248531/baseline-values-of-cardiovascular-and-respiratory-parameters-predict-response-to-acute-hypoxia-in-young-healthy-men
#17
V N Melnikov, S G Krivoschekov, V E Divert, T G Komlyagina, N S Consedine
The majority of the available works have studied distinct hypoxic responses of respiratory and cardiovascular systems. This study examines how these systems interact while responding to hypoxia and whether baseline metrics moderate reactions to a hypoxic challenge. Central hemodynamic, aortic wave reflection, and gas exchange parameters were measured in 27 trained young men before and after 10-min normobaric isocapnic hypoxia (10 % O2). Associations were assessed by correlation and multiple regression analyses...
February 28, 2017: Physiological Research
https://www.readbyqxmd.com/read/28244635/effect-of-linagliptin-on-pulse-wave-velocity-in-early-type-2-diabetes-release-a-randomized-double-blind-controlled-26-week-trial
#18
Stefanie A de Boer, Hiddo J L Heerspink, Luis E Juárez Orozco, Arie M van Roon, Pieter W Kamphuisen, Andries J Smit, Riemer H J A Slart, Joop D Lefrandt, Douwe J Mulder
AIMS: To evaluate the effects of the DPP-4 inhibitor linagliptin on aortic pulse wave velocity (PWV) as a surrogate marker of arterial stiffness and early atherosclerosis in early type 2 diabetes subjects. MATERIALS AND METHODS: A total of 45 type 2 diabetes subjects (median age 63 (IQR: 54-66) years, 61% male, mean hemoglobinA1c (HbA1c ) 6.3 ± 0.4 % (45 ± 4.6 mmol/mol)) without cardiovascular disease and naïve to antidiabetic treatment were randomized (1:1) to treatment with linagliptin 5 mg once daily or placebo for 26 weeks in a double-blind fashion...
February 28, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/28229053/large-artery-stiffness-assessment-using-sphygmocor-technology
#19
REVIEW
Mark Butlin, Ahmad Qasem
Large artery stiffness assessment has been an integral part of the SphygmoCor technology since 1998. Aortic stiffness is approximated with non-invasive measurement of carotid-femoral pulse wave velocity, with improvements made with time to make the assessment procedure quicker and more user independent. Also standard in the devices is the ability to reliably calculate the central aortic waveform shape from a peripheral pressure waveform from either the brachial or radial artery. This waveform contains much information beyond peak and trough (systolic and diastolic pressure)...
January 2017: Pulse (Basel, Switzerland)
https://www.readbyqxmd.com/read/28228313/significant-intra-valvular-pressure-loss-across-epic-supra-and-perimount-magna-supra-annular-designed-aortic-bioprostheses-in-patients-with-normal-aortic-size
#20
Jagdish C Mohan, Vishwas Mohan, Madhu Shukla, Arvind Sethi
Doppler-derived trans-prosthetic gradients are higher and the estimated effective valve area is smaller than the catheter-derived and directly measured hemodynamic values, mostly due to pressure recovery phenomenon. Pressure recovery to a varying extent is common to all prosthetic heart valves including bioprostheses. Pressure recovery-related differences are usually small except in patients with bileaflet metallic prosthesis, wherein high-pressure local jets across central orifice have been documented since long back and also in patients with narrow aortic root...
January 2017: Indian Heart Journal
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