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reactive hyperemia index

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https://www.readbyqxmd.com/read/28628045/cardio-respiratory-effects-of-air-pollution-in-a-panel-study-of-outdoor-physical-activity-and-health-in-rural-older-adults
#1
David M Stieb, Robin Shutt, Lisa Kauri, Sarah Mason, Li Chen, Mieczyslaw Szyszkowicz, Nina A Dobbin, Marc Rigden, Branka Jovic, Marie Mulholland, Martin S Green, Ling Liu, Guillaume Pelletier, Scott A Weichenthal, Robert E Dales, Isaac Luginaah
OBJECTIVE: To examine cardio-respiratory effects of air pollution in rural older adults exercising outdoors. METHODS: Adults 55 and over completed measurements of blood pressure, peak expiratory flow and oximetry daily, and of heart rate variability, endothelial function, spirometry, fraction of exhaled nitric oxide and urinary oxidative stress markers weekly, before and after outdoor exercise, for 10 weeks. Data were analyzed using linear mixed effect models. RESULTS: Pooled estimates combining 2013 (n = 36 participants) and 2014 (n = 41) indicated that an interquartile increase in the air quality health index (AQHI) was associated with a significant (P < 0...
April 2017: Journal of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/28625369/rationale-and-design-of-the-hunting-for-the-off-target-properties-of-ticagrelor-on-endothelial-function-and-other-circulating-biomarkers-in-humans-hi-tech-trial
#2
Sara Ariotti, Maarten van Leeuwen, Salvatore Brugaletta, Sergio Leonardi, Kristiaan Martijn Akkerhuis, Emrush Rexhaj, Gladys Janssens, Luis Ortega-Paz, Diego Rizzotti, Jan C van den Berge, Dierik Heg, Gloria Francolini, Stephan Windecker, Marco Valgimigli
BACKGROUND: Among the 3 approved oral P2Y12 inhibitors for the treatment for patients with acute coronary syndrome (ACS), ticagrelor, but not prasugrel or clopidogrel, has been associated with off-target properties, such as improved endothelial-dependent vasomotion and increased adenosine plasma levels. METHODS: The HI-TECH study (NCT02587260) is a multinational, randomized, open-label, crossover study with a Latin squares design, conducted at 5 European sites, in which patients free from recurrent ischemic or bleeding events ≥30 days after a qualifying ACS were allocated to sequentially receive a 30 ± 5-day treatment with prasugrel, clopidogrel, and ticagrelor in random order...
July 2017: American Heart Journal
https://www.readbyqxmd.com/read/28607132/impaired-muscle-oxygenation-and-elevated-exercise-blood-pressure-in-hypertensive-patients-links-with-vascular-stiffness
#3
Konstantina Dipla, Areti Triantafyllou, Nikolaos Koletsos, Stavros Papadopoulos, Vasileios Sachpekidis, Ioannis S Vrabas, Eugenia Gkaliagkousi, Andreas Zafeiridis, Stella Douma
This study examined in vivo (1) skeletal muscle oxygenation and microvascular function, at rest and during handgrip exercise, and (2) their association with macrovascular function and exercise blood pressure (BP), in newly diagnosed, never-treated patients with hypertension and normotensive individuals. Ninety-one individuals (51 hypertensives and 40 normotensives) underwent office and 24-hour ambulatory BP, arterial stiffness, and central aortic BP assessment, followed by a 5-minute arterial occlusion and a 3-minute submaximal handgrip exercise...
June 12, 2017: Hypertension
https://www.readbyqxmd.com/read/28571621/hemodynamic-catecholamine-vasomotor-and-vascular-responses-determinants-of-myocardial-ischemia-during-mental-stress
#4
Muhammad Hammadah, Ayman Alkhoder, Ibhar Al Mheid, Kobina Wilmot, Nino Isakadze, Naser Abdulhadi, Danielle Chou, Malik Obideen, Wesley T O'Neal, Samaah Sullivan, Ayman Samman Tahhan, Heval Mohamed Kelli, Ronnie Ramadan, Pratik Pimple, Pratik Sandesara, Amit J Shah, Laura Ward, Yi-An Ko, Yan Sun, Irina Uphoff, Brad Pearce, Ernest V Garcia, Michael Kutner, J Douglas Bremner, Fabio Esteves, David S Sheps, Paolo Raggi, Viola Vaccarino, Arshed A Quyyumi
AIMS: Mental stress-induced myocardial ischemia (MSIMI) in patients with coronary artery disease (CAD) is associated with adverse cardiovascular outcomes. We aim to assess hemodynamic, neuro-hormonal, endothelial, vasomotor and vascular predictors of MSIMI. METHODS AND RESULTS: We subjected 660 patients with stable CAD to 99mTc sestamibi myocardial perfusion imaging at rest, with mental (speech task) and with conventional (exercise/pharmacological) stress. Endothelium-dependent flow-mediated dilation (FMD), microvascular reactivity [reactive hyperemia index (RHI)] and arterial stiffness [pulse wave velocity (PWV)] were measured at rest and 30-min after mental stress...
May 25, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28561781/comparison-of-the-peripheral-reactive-hyperemia-index-with-myocardial-perfusion-reserve-by-82-rb-pet-ct-in-hiv-infected-patients
#5
Mathilde Ørbæk, Philip Hasbak, Rasmus Sejersten Ripa, Andreas Kjær, Anne-Mette Lebech, Andreas Knudsen
After the introduction of antiretroviral therapy (ART) the life expectancy of patients infected with human immunodeficiency virus (HIV) is now approaching that of the general population and the importance of non-AIDS co-morbidities is increasing. Specifically, the risk of coronary artery disease (CAD) seems to be higher in HIV-infected patients and an accurate risk prediction of CAD is of high importance for optimal long term treatment. In this study, we assessed the correlation of the endoPAT, which is an office-based CVD screening tool with the myocardial perfusion reserve by (82)-rubidium PET/CT...
May 31, 2017: Diagnostics
https://www.readbyqxmd.com/read/28560282/clinical-and-biochemical-data-of-endothelial-function-in-women-consuming-combined-contraceptives
#6
Irina I Lobysheva, Sandrine van Eeckhoudt, Flavia Dei Zotti, Ahmad Rifahi, Lucie Pothen, Christophe Beauloye, Jean-Luc Balligand
The data presented in this article are associated with the research article entitled "Heme-Nitrosylated Hemoglobin and Oxidative Stress in Women Consuming Combined Contraceptives. Clinical Application of the EPR Spectroscopy" (Lobysheva et al., 2017 [1]), and describe the characteristics of redox status in blood, as well as biochemical and clinical parameters of young female subjects consuming (or not) contraceptive pills (CP). Erythrocyte concentration of reduced thiols reflecting erythrocyte redox capacity was measured before and after sample deproteinization by electron paramagnetic resonance spectroscopy (EPR) using a nitroxide biradical spin probe specifically interacting with reduced thiols; additional data were obtained by a colorimetric method using Ellman׳s reagents in the same samples...
August 2017: Data in Brief
https://www.readbyqxmd.com/read/28553846/the-effects-of-cd4-nadirs-on-vessel-stiffness-in-hiv-patients-undergoing-antiretroviral-therapy
#7
Tomasz Mikuła, Paweł Balsam, Michał Peller, Magdalena Suchacz, Bartosz Puchalski, Łukasz Kołtowski, Kacper Maciejewski, Alicja Wiercińska-Drapało, Grzegorz Opolski, Krzysztof J Filipiak
BACKGROUND: Many factors are associated with HIV (the human immunodeficiency virus) patients having a greater risk of cardiovascular diseases. HIV damages vessel endothelium through chronic inflammation which combined with dyslipidemia, arterial hypertension and antiretroviral therapy leads to the progression of atherosclerotic changes. AIM: Our goal was to determine if a CD4 nadir along with immunologic, inflammatory, biochemical and metabolic markers can be associated with higher vessel stiffness and therefore an increased risk of cardiovascular diseases in patients undergoing antiretroviral therapy for HIV...
May 29, 2017: Kardiologia Polska
https://www.readbyqxmd.com/read/28526381/medium-term-effect-of-sublingual-l-glutathione-supplementation-on-flow-mediated-dilation-in-subjects-with-cardiovascular-risk-factors
#8
Jonica Campolo, Stefano Bernardi, Lorena Cozzi, Silvia Rocchiccioli, Cinzia Dellanoce, Antonella Cecchettini, Annamaria Tonini, Marina Parolini, Benedetta De Chiara, Gianpaolo Micheloni, Gualtiero Pelosi, Claudio Passino, Cristina Giannattasio, Oberdan Parodi
OBJECTIVE: Supplementation of glutathione (GSH) may be a positive strategy to improve the endogenous antioxidant defense required to counteract many acute and chronic diseases. However, the efficacy of GSH treatment seems to be closely related to type of administration, degree of absorption, and increase of its concentrations. The aim of this study was to test a new sublingual formulation of L-GSH, which enters directly the systemic circulation, to assess its efficacy on circulating biochemical markers of hepatic metabolism, lipid profile, and oxidative stress and on peripheral vascular function compared with placebo in patients with cardiovascular risk factors (CVRF)...
June 2017: Nutrition
https://www.readbyqxmd.com/read/28525354/the-relationship-between-insulin-resistance-and-endothelial-dysfunction-in-obese-adolescents
#9
Preneet Cheema Brar, Payal Patel, Stuart Katz
BACKGROUND: Insulin resistance and endothelial dysfunction share a reciprocal relationship that links the metabolic and cardiovascular sequelae of obesity. We characterized the brachial artery reactivity testing (BART) and carotid artery-intima media thickness (CIMT) in adolescents categorized as obese insulin resistant (OIR) and obese not insulin resistant (ONIR). Lipoprotein particle (p) analysis and inflammatory cytokines in OIR and ONIR groups were also analyzed. METHODS: Obese adolescents (n=40; mean body mass index [BMI] 35...
May 24, 2017: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/28515707/validation-of-repeated-endothelial-function-measurements-using-endopat-in-stroke
#10
Aina S Hansen, Jawad H Butt, Sonja Holm-Yildiz, William Karlsson, Christina Kruuse
BACKGROUND: Decreased endothelial function (EF) may be a prognostic marker for stroke. Measuring pharmacological effects on EF may be of interest in the development of personalized medicine for stroke prevention. In this study, we assessed the reliability of repeated EF measurements using a pulse amplitude tonometry technology in acute stroke patients. Similarly, reliability was tested in healthy subjects devoid of vascular disease to estimate reactivity and reliability in a younger non-stroke population...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28512721/mid-term-risk-for-subclinical-atherosclerosis-and-chronic-myocarditis-in-children-with-kawasaki-disease-and-transient-coronary-abnormalities
#11
Mansingh Parihar, Surjit Singh, Pandiarajan Vignesh, Anju Gupta, Manojkumar Rohit
There is evidence for premature atherosclerosis and systemic arterial stiffening during follow-up of children with Kawasaki disease (KD) and coronary artery abnormalities (CAA). Moreover, patients with KD may also have subclinical myocardial involvement and inhomogeneous ventricular repolarization. The inhomogeneous ventricular repolarization manifests as increased QT dispersion on electrocardiography. There is a paucity of studies in endothelial dysfunction and QT dispersion in children with KD and transient CAA...
May 17, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28508133/children-and-adolescents-macrovascular-reactivity-level-and-dynamics-but-not-the-microvascular-response-is-associated-with-body-mass-index-and-arterial-stiffness-levels
#12
Yanina Zócalo, Marco Marotta, Victoria García-Espinosa, Santiago Curcio, Pedro Chiesa, Gustavo Giachetto, Daniel Bia
INTRODUCTION: The existing evidence indicates that primary prevention of atherosclerotic disease should begin in childhood. Detection of children and adolescents at risk for atherosclerosis may allow early intervention to decrease the atherosclerotic process, thereby preventing or delaying cardiovascular disease. Vascular reactivity (VR) is altered even by early atherosclerosis. Obesity is a main cardiovascular risk factor (CVRF) observed in childhood. If childhood obesity associates impaired macro and/or micro VR is controversial...
May 15, 2017: High Blood Pressure & Cardiovascular Prevention: the Official Journal of the Italian Society of Hypertension
https://www.readbyqxmd.com/read/28488836/effects-of-low-load-resistance-exercise-with-blood-flow-restriction-on-intramuscular-hemodynamics-oxygenation-level-and-water-content
#13
Osamu Yanagisawa, Atsuki Fukutani
BACKGROUND: Muscle metabolism during and after low-load blood flow restriction (BFR) exercise should be further investigated to clarify the mechanism by which the exercise leads to muscle hypertrophy, and increases strength and endurance. We aimed to investigate the effects of low-load resistance exercise with BFR on intramuscular hemodynamics, oxygenation level, and water content. METHODS: Seven men performed ankle plantar flexion exercise (120 repetitions, 30% one repetition maximum) using a custom-made device with and without BFR inside a magnetic resonance scanner...
May 9, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28465609/childhood-body-mass-index-and-endothelial-dysfunction-evaluated-by-peripheral-arterial-tonometry-in-early-midlife
#14
M J A Williams, B J Milne, A Ambler, R Theodore, S Ramrakha, A Caspi, T E Moffitt, R Poulton
BACKGROUND/OBJECTIVES: Endothelial dysfunction predicts mortality but it is unknown whether childhood obesity predicts adult endothelial dysfunction. The aim of this study was to determine whether anthropometric indices of body fat in childhood, adolescence and early midlife are associated with endothelial dysfunction in early midlife. SUBJECTS/METHODS: Participants belonged to a representative birth cohort of 1037 individuals born in Dunedin, New Zealand in 1972 and 1973 and followed to age 38 years, with 95% retention (the Dunedin Multidisciplinary Health and Development Study)...
May 3, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28447271/the-relationship-between-vascular-endothelial-dysfunction-and-treatment-frequency-in-neovascular-age-related-macular-degeneration
#15
Tomoko Ueda-Consolvo, Atsushi Hayashi, Mayumi Ozaki, Tomoko Nakamura, Takaaki Yagou, Shinya Abe
PURPOSE: To assess the correlation between endothelial dysfunction and frequency of antivascular endothelial growth factor (anti-VEGF) treatment for neovascular age-related macular degeneration (nAMD). METHODS: We examined 64 consecutive patients with nAMD who were evaluated for endothelial function by use of peripheral arterial tonometry (EndoPAT 2000; Itamar Medical, Caesarea, Israel) at Toyama University Hospital from January 2015. We tallied the number of anti-VEGF treatments between January 2014 and December 2015 and determined the correlation between the number of anti-VEGF injections and endothelial function expressed as the reactive hyperemia index (RHI)...
April 26, 2017: Japanese Journal of Ophthalmology
https://www.readbyqxmd.com/read/28446494/effects-of-the-mean-amplitude-of-glycemic-excursions-and-vascular-endothelial-dysfunction-on-cardiovascular-events-in-nondiabetic-patients-with-coronary-artery-disease
#16
Tomonori Akasaka, Daisuke Sueta, Noriaki Tabata, Seiji Takashio, Eiichiro Yamamoto, Yasuhiro Izumiya, Kenichi Tsujita, Sunao Kojima, Koichi Kaikita, Kunihiko Matsui, Seiji Hokimoto
BACKGROUND: Mean amplitude of glycemic excursion (MAGE) is commonly used to gauge the degree of glucose level fluctuations. MAGE plays a significant role in vascular endothelial dysfunction and cardiovascular events in patients with diabetes mellitus (DM), but its significance is not clear in non-DM patients. Thus, we examined the impact of MAGE and vascular endothelial dysfunction on clinical outcomes in non-DM patients with coronary artery disease. METHODS AND RESULTS: We followed non-DM patients (n=65) for 12 months who underwent percutaneous coronary intervention and assessed the relationship among MAGE, reactive hyperemia index (RHI) measured by reactive hyperemia peripheral arterial tonometry as endothelial function, and cardiovascular events...
April 26, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28436117/early-introduction-of-oral-paricalcitol-in-renal-transplant-recipients-an-open-label-randomized-study
#17
Hege Kampen Pihlstrøm, Franscesca Gatti, Clara Hammarström, Ivar Anders Eide, Monika Kasprzycka, Junbai Wang, Guttorm Haraldsen, My Hanna Sofia Svensson, Karsten Midtvedt, Geir Mjøen, Dag Olav Dahle, Anders Hartmann, Hallvard Holdaas
In stable renal transplant recipients with hyperparathyroidism, previous studies have indicated that vitamin D agonist treatment might have anti-proteinuric effects. Animal studies indicate possible anti-fibrotic and anti-inflammatory effects. Early introduction of paricalcitol in de novo renal transplant recipients might reduce proteinuria and prevent progressive allograft fibrosis. We performed a single-center, prospective, randomized, open-label trial investigating effects of paricalcitol 2 μg/day added to standard care...
April 24, 2017: Transplant International: Official Journal of the European Society for Organ Transplantation
https://www.readbyqxmd.com/read/28412277/the-association-of-endothelial-function-and-tone-by-digital-arterial-tonometry-with-mri-left-ventricular-mass-in-african-americans-the-jackson-heart-study
#18
Avnish Tripathi, Emelia J Benjamin, Solomon K Musani, Naomi M Hamburg, Connie W Tsao, Arti Saraswat, Ramachandran S Vasan, Gary F Mitchell, Ervin R Fox
Peripheral vascular endothelial dysfunction assessed by digital peripheral arterial tonometry (PAT) has been associated with risk for adverse cardiovascular events. We examined the relations of peripheral microvascular dysfunction and left ventricular mass in a community-based cohort of African Americans. We examined participants of the Jackson Heart Study who had PAT and cardiac magnetic resonance imaging evaluations between 2007 and 2013. Consistent with pertinent literature, left ventricular mass index (LVMI) was adjusted for body size by indexing to height(2...
March 27, 2017: Journal of the American Society of Hypertension: JASH
https://www.readbyqxmd.com/read/28408073/pre-procedural-peripheral-endothelial-function-is-associated-with-increased-serum-creatinine-following-percutaneous-coronary-procedure-in-stable-patients-with-a-preserved-estimated-glomerular-filtration-rate
#19
Hitoshi Sumida, Yasushi Matsuzawa, Seigo Sugiyama, Koichi Sugamura, Toshimitsu Nozaki, Eiichi Akiyama, Keisuke Ohba, Masaaki Konishi, Junichi Matsubara, Koichiro Fujisue, Hirofumi Maeda, Hirofumi Kurokawa, Satomi Iwashita, Hisao Ogawa, Kenichi Tsujita
BACKGROUND: Worsening renal function, indicated by increased serum creatinine (SCr), is a common complication of percutaneous coronary procedures. Risk factors for increased SCr overlap with coronary risk factors involved in endothelial dysfunction. We hypothesized that endothelial dysfunction, measured using the reactive hyperemia peripheral arterial tonometry index (RHI), can predict periprocedure-increased SCr. METHODS: RHI was assessed before elective coronary procedures in 316 consecutive stable patients with a preserved estimated glomerular filtration rate (eGFR, >60mL/min/1...
April 10, 2017: Journal of Cardiology
https://www.readbyqxmd.com/read/28403850/rationale-and-design-of-a-multicenter-placebo-controlled-double-blind-randomized-trial-to-evaluate-the-effect-of-empagliflozin-on-endothelial-function-the-emblem-trial
#20
RANDOMIZED CONTROLLED TRIAL
Atsushi Tanaka, Michio Shimabukuro, Yosuke Okada, Isao Taguchi, Minako Yamaoka-Tojo, Hirofumi Tomiyama, Hiroki Teragawa, Seigo Sugiyama, Hisako Yoshida, Yasunori Sato, Atsushi Kawaguchi, Yumi Ikehara, Noritaka Machii, Tatsuya Maruhashi, Kosuke R Shima, Toshinari Takamura, Yasushi Matsuzawa, Kazuo Kimura, Masashi Sakuma, Jun-Ichi Oyama, Teruo Inoue, Yukihito Higashi, Shinichiro Ueda, Koichi Node
BACKGROUND: Type 2 diabetes mellitus (T2DM) is characterized by systemic metabolic abnormalities and the development of micro- and macrovascular complications, resulting in a shortened life expectancy. A recent cardiovascular (CV) safety trial, the EMPA-REG OUTCOME trial, showed that empagliflozin, a sodium glucose cotransporter 2 (SGLT2) inhibitor, markedly reduced CV death and all-cause mortality and hospitalization for heart failure in patients with T2DM and established CV disease (CVD)...
April 12, 2017: Cardiovascular Diabetology
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