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https://www.readbyqxmd.com/read/28329460/model-based-comparison-of-the-normal-and-fontan-circulatory-systems-part-iii
#1
Raymond L Watrous, Alvin J Chin
BACKGROUND: For patients with the Fontan circulatory arrangement, angiotensin-converting enzyme inhibition, guanylate cyclase activation, phosphodiesterase 5 inhibition, and endothelin receptor antagonism have so far resulted in little or no improvement in [Formula: see text] or peak cardiac index (CI), suggesting that our understanding of the factors that most impact the exercise hemodynamics is incomplete. METHODS: To facilitate comparisons with clinical reports of the exercise performance of preadolescent Fontan patients, we rescaled our previously reported computational models of a two-year-old normal child and similarly aged Fontan patient, extended our Fontan model to capture the nonlinear relationship between flow and resistance quantified from previous computational fluid dynamic analyses of the total cavopulmonary connection (TCPC), and added respiration as well as skeletal muscle contraction...
March 2017: World Journal for Pediatric & Congenital Heart Surgery
https://www.readbyqxmd.com/read/28329315/seraphin-haemodynamic-sub-study-the-effect-of-the-dual-endothelin-receptor-antagonist-macitentan-on-haemodynamic-parameters-and-nt-probnp-levels-and-their-association-with-disease-progression-in-patients-with-pulmonary-arterial-hypertension
#2
Nazzareno Galiè, Pavel Jansa, Tomás Pulido, Richard N Channick, Marion Delcroix, Hossein-Ardeschir Ghofrani, Franck-Olivier Le Brun, Sanjay Mehta, Loïc Perchenet, Lewis J Rubin, B K S Sastry, Gérald Simonneau, Olivier Sitbon, Rogério Souza, Adam Torbicki
Aims: The effect of macitentan on haemodynamic parameters and NT-proBNP levels was evaluated in pulmonary arterial hypertension (PAH) patients in the SERAPHIN study. Association between these parameters and disease progression, assessed by the primary endpoint (time to first morbidity/mortality event), was explored. Methods and results: Of the 742 randomized patients, 187 with right heart catheterization at baseline and month 6 participated in a haemodynamic sub-study...
February 28, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28329267/right-ventricular-recovery-after-bilateral-lung-transplantation-for-pulmonary-arterial-hypertension%C3%A2
#3
Thomas M Gorter, Erik A M Verschuuren, Dirk J van Veldhuisen, Elke S Hoendermis, Michiel E Erasmus, Harm J Bogaard, Anton Vonk Noordegraaf, Rolf M F Berger, Joost P van Melle, Tineke P Willems
OBJECTIVES: Pulmonary arterial hypertension (PAH) is a progressive and often fatal disease characterized by increased pulmonary vascular resistance (PVR) and right ventricular (RV) failure. End-stage PAH is often an indication for a lung transplant (LTX). Our goal was to study ventricular recovery using cardiac magnetic resonance imaging late after LTX. METHODS: We studied 10 patients with PAH who underwent isolated bilateral LTX. RV and left ventricular (LV) volumes, function and mass were measured...
March 3, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28329091/association-between-sleep-timing-obesity-diabetes-the-hispanic-community-health-study-study-of-latinos-hchs-sol-cohort-study-sleep-timing-obesity-and-diabetes
#4
Kristen L Knutson, Donghong Wu, Sanjay R Patel, Jose S Loredo, Susan Redline, Jianwen Cai, Linda C Gallo, Yasmin Mossavar-Rahmani, Alberto R Ramos, Yanping Teng, Martha L Daviglus, Phyllis C Zee
Study Objectives: Recent studies implicate inadequate sleep duration and quality in metabolic disease. Fewer studies have examined the timing of sleep, which may be important because of its potential impact on circadian rhythms of metabolic function. We examined the association between sleep timing and metabolic risk among Hispanic/Latino adults. Methods.: Cross-sectional data from community-based study of 13,429 participants aged 18-74 years. People taking diabetes medications were excluded...
January 28, 2017: Sleep
https://www.readbyqxmd.com/read/28328821/is-carotid-sonography-a-useful-tool-for-predicting-functional-capabilities-in-ischemic-stroke-patients-following-carotid-artery-stenting
#5
Chih-Ming Lin, Jian-Chi Su, Yu-Jun Chang, Chi-Kuang Liu, Henry Horng-Shing Lu, Yuh-Jyh Jong
Carotid stenosis is a major cause of stroke and timely intervention with stenting manipulation can significantly reduce the risk of secondary stroke. The impact of stenting procedures on patient functional capabilities has not yet been explored. The primary aim of this study was to examine associations between periprocedural carotid sonography parameters and post-treatment functional capabilities in stroke patients.Sixty-seven patients who received carotid stenting at 1 angiography laboratory were included...
March 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28327932/integrated-safety-analysis-of-rolapitant-with-coadministered-drugs-from-phase-ii-iii-trials-an-assessment-of-cyp2d6-or-bcrp-inhibition-by-rolapitant
#6
S Barbour, T Smit, X Wang, D Powers, S Arora, V Kansra, M Aapro, J Herrstedt
Background: Rolapitant, a long-acting neurokinin (NK) 1 receptor antagonist (RA), has demonstrated efficacy in prevention of chemotherapy-induced nausea and vomiting in patients administered moderately or highly emetogenic chemotherapy. Unlike other NK 1 RAs, rolapitant does not inhibit or induce cytochrome P450 (CYP) 3A4, but it does inhibit CYP2D6 and breast cancer resistance protein (BCRP). To analyze potential drug-drug interactions between rolapitant and concomitant medications, this integrated safety analysis of four double-blind, randomized phase II or III studies of rolapitant examined adverse events by use versus non-use of drug substrates of CYP2D6 or BCRP...
February 23, 2017: Annals of Oncology: Official Journal of the European Society for Medical Oncology
https://www.readbyqxmd.com/read/28327653/association-of-aldosterone-excess-and-apnea-hypopnea-index-in-patients-with-resistant-hypertension
#7
Xiao Ke, Wenyu Guo, Hu Peng, Chengheng Hu, Henghong Zhang, Changnong Peng, Xiaoqing Wang
The present study was to investigate the association of aldosterone excess and apnea-hypopnea index (AHI) in patients with resistant hypertension. Patients with resistant hypertension were enrolled and baseline characteristics including plasma aldosterone concentration (PAC) and 24 h-urine aldosterone levels were collected and compared between groups with different degrees of AHI as assessed by polysomnography. Association of key variables and AHI was then evaluated by univariate and multiple linear regression analysis...
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28327563/health-benefits-and-consequences-of-the-eastern-orthodox-fasting-in-monks-of-mount-athos-a-cross-sectional-study
#8
S N Karras, A Persynaki, A Petróczi, E Barkans, H Mulrooney, M Kypraiou, T Tzotzas, K Tziomalos, K Kotsa, A A Tsioudas, C Pichard, D P Naughton
BACKGROUND/OBJECTIVES: Greek Orthodox fasting (OF), which involves 180-200 days of fasting per year, is dictated by the Christian Orthodox religion. For the first time, this cross-sectional study examines the characteristics and the effects of OF on anthropometry, cardiometabolic markers and calcium homeostasis in Athonian monks (AMs). SUBJECTS/METHODS: Daily intakes of energy, macro- and micronutrients of a day during a weekend of Nativity Fast, defined as non-restrictive day (NRD), and a weekday during Great Lent, labeled as restrictive day (RD) were recorded...
March 22, 2017: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28325518/the-impact-of-age-and-gender-on-right-ventricular-diastolic-function-among-healthy-adults
#9
Antonello D'Andrea, Olga Vriz, Andreina Carbone, Francesco Ferrara, Marco Di Maio, Rosangela Cocchia, Gianluigi Tagliamonte, Edwige Acri, Caterina Driussi, Enrica Pezzullo, Rodolfo Citro, Antonio Cittadini, Raffaele Calabrò, Maria Giovanna Russo, Eduardo Bossone
BACKGROUND: Doppler echocardiography is ideally suited for assessment of diastolic function, being widely available, non-invasive, and less expensive than other techniques. However, data regarding age- and gender-matched reference values of right ventricular diastolic function are limited. This study aims to explore the physiologic variations of right ventricle (RV) diastolic function in a large cohort of healthy adults, and to investigate clinical and echocardiographic correlates. METHODS: From June 2007 to February 2014, 1168 healthy Caucasian subjects [mean age 45...
March 18, 2017: Journal of Cardiology
https://www.readbyqxmd.com/read/28325476/erectile-dysfunction-in-patients-with-nonalcoholic-fatty-liver-disease
#10
Ahmad Farooq Alsayed Hasanain, Reem Ezzat Mahdy, Ali Mohamed Abdel-Rahman Mahran, Ahmed Serag Mahmoud Safwat, Asmaa Omar Mohamed, Sherif Mohamed Abdel-Aal
BACKGROUND AND STUDY AIMS: There is a lack of studies on erectile dysfunction (ED) in patients diagnosed with nonalcoholic fatty liver disease (NAFLD). The present study aimed to estimate the prevalence of ED in patients with NAFLD and to determine the independent predictors of ED in these patients. PATIENTS AND METHODS: We conducted a prospective, hospital-based study of 192 consecutive male patients with NAFLD. All patients underwent clinical evaluation; abdominal ultrasonography; test for viral hepatitis markers; and estimation of liver chemistry panel, complete blood count, prothrombin time, serum lipids panel, serum testosterone, and fasting serum levels of glucose, insulin, and C-peptide...
March 16, 2017: Arab Journal of Gastroenterology: the Official Publication of the Pan-Arab Association of Gastroenterology
https://www.readbyqxmd.com/read/28325445/nonlinear-model-on-pulsatile-flow-of-blood-through-a-porous-bifurcated-arterial-stenosis-in-the-presence-of-magnetic-field-and-periodic-body-acceleration
#11
R Ponalagusamy, S Priyadharshini
BACKGROUND AND OBJECTIVE: Background and Objective: The motivation of cardiovascular modeling is to understand the haemodynamic and mechanical factors in the diagnosis and treatment of cardiovascular diseases. Several investigations have been carried out by many authors to understand the flow properties of blood in modelling blood flows in the circulatory system. In the present article, the pulsatile flow of Herschel-Bulkley fluid through a bifurcated arterial stenosis in a porous medium with magnetic field and periodic body acceleration has been investigated in view of understanding the role of rheological behaviour of blood, stenotic height, bifurcation angle, magnetic field and porosity of wall in the initiation and proliferation of cardiovascular diseases...
April 2017: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/28325302/aptamer-drug-conjugates-of-active-metabolites-of-nucleoside-analogs-and-cytotoxic-agents-inhibit-pancreatic-tumor-cell-growth
#12
Sorah Yoon, Kai-Wen Huang, Vikash Reebye, Duncan Spalding, Teresa M Przytycka, Yijie Wang, Piotr Swiderski, Lin Li, Brian Armstrong, Isabella Reccia, Dimitris Zacharoulis, Konstantinos Dimas, Tomokazu Kusano, John Shively, Nagy Habib, John J Rossi
Aptamer-drug conjugates (ApDCs) have the potential to improve the therapeutic index of traditional chemotherapeutic agents due to their ability to deliver cytotoxic drugs specifically to cancer cells while sparing normal cells. This study reports on the conjugation of cytotoxic drugs to an aptamer previously described by our group, the pancreatic cancer RNA aptamer P19. To this end, P19 was incorporated with gemcitabine and 5-fluorouracil (5-FU), or conjugated to monomethyl auristatin E (MMAE) and derivative of maytansine 1 (DM1)...
March 17, 2017: Molecular Therapy. Nucleic Acids
https://www.readbyqxmd.com/read/28324981/hemodynamic-determinants-and-ventriculo-arterial-coupling-are-sex-associated-in-heart-failure-patients
#13
Peter L Kerkhof, Guy R Heyndrickx, John K-J Li
End-systolic volume (ESV) and end-diastolic volume (EDV) are key parameters in the analysis of left ventricular (LV) function, and the study of cardiac remodeling. The volume regulation graph (VRG) relates these fundamental determinants, and permits convenient stratification for clinically relevant covariates. This contribution analyzes sex-associated differences in hemodynamic parameters for 197 heart failure (HF) patients, evaluated by biplane ventriculography, in combination with arterial pressure. We calculated LV parameters such as stroke volume (SV), cardiac output (CO), ESV, EDV, ejection fraction (EF), end-systolic elastance (Emax), besides arterial parameters: effective arterial elastance (Ea), elastance ratio (the coupling index k), peripheral resistance (Rs), pulse pressure (PP), and arterial compliance (C), all normalized for body surface area when appropriate...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324251/simulating-changes-in-cropping-practises-in-conventional-and-glyphosate-tolerant-maize-i-effects-on-weeds
#14
Nathalie Colbach, Alice Fernier, Valérie Le Corre, Antoine Messéan, Henri Darmency
Herbicide-tolerant (HT) crops such as those tolerant to glyphosate simplify weed management and make it more efficient, at least at short-term. Overreliance on the same herbicide though leads to the spread of resistant weeds. Here, the objective was to evaluate, with simulations, the impact on the advent of glyphosate resistance in weeds of modifications in agricultural practises resulting from introducing HT maize into cropping systems. First, we included a single-gene herbicide resistance submodel in the existing multispecific FLORSYS model...
March 21, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28324007/aberrant-tgf-%C3%AE-signaling-drives-castration-resistant-prostate-cancer-in-a-male-mouse-model-of-prostate-tumorigenesis
#15
Hong Pu, Diane Begemann, Natasha Kyprianou
The androgen receptor (AR) plays a critical role as a driver of castration-resistant-prostate cancer (CRPC). Our previous studies demonstrated that disruption of transforming growth factor-β (TGF-β) signaling via introduction of dominant-negative TGF-β type II receptor (DNTGF-RβII) in the prostate epithelium of transgenic adenocarcinoma of the prostate (TRAMP) mice accelerated tumor. This study investigated the consequences of disrupted TGF-β signaling on prostate tumor growth under conditions of castration-induced androgen deprivation (ADT) in the pre-clinical model DNTGFβRII...
March 16, 2017: Endocrinology
https://www.readbyqxmd.com/read/28323986/chronic-intranasal-insulin-does-not-affect-hepatic-lipids-but-lowers-circulating-bcaas-in-healthy-male-subjects
#16
Thomas Scherer, Peter Wolf, Sabina Smajis, Melania Gaggini, Martina Hackl, Amalia Gastaldelli, Peter Klimek, Elisa Einwallner, Rodrig Marculescu, Anton Luger, Clemens Fürnsinn, Siegfried Trattnig, Christoph Buettner, Martin Krššák, Michael Krebs
Context: Non-alcoholic fatty liver disease and elevated circulating branched-chain amino acids (BCAAs) are common characteristics of obesity and type 2 diabetes. In rodents, brain insulin signaling controls both hepatic triglyceride secretion and BCAA catabolism. Whether brain insulin signaling controls similar metabolic pathways in humans is unknown. Objective: Here we assessed if intranasal insulin, a method to preferentially deliver insulin to the central nervous system, is able to modulate hepatic lipid content and plasma BCAAs in humans...
January 16, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28323973/how-to-measure-adipose-tissue-insulin-sensitivity
#17
Esben Søndergaard, Ana Elena Espinosa De Ycaza, Maria Morgan-Bathke, Michael D Jensen
Background: Adipose tissue insulin resistance may be a proximate cause of hepatic and skeletal muscle insulin resistance by releasing excess FFA. However, no consensus exists on how to quantify adipose tissue insulin sensitivity. We compared three methods for measuring adipose tissue insulin sensitivity ranging from the complex multistep pancreatic clamp technique to the simple adipose tissue insulin resistance index (Adipo-IR). Methods: We completed studies of 25 adults with a wide range of insulin sensitivity...
January 31, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28323969/early-pregnancy-associated-plasma-protein-a-concentrations-are-associated-with-third-trimester-insulin-sensitivity
#18
Clive J Petry, Ken K Ong, Ieuan A Hughes, Carlo L Acerini, Jan Frystyk, David B Dunger
Context: First or early second trimester pregnancy-associated plasma protein-A (PAPP-A) concentrations have previously been shown to be lower in women who subsequently develop gestational diabetes (GDM) and gestational hypertension. Objective: We therefore sought to investigate why circulating PAPP-A concentrations are related to the subsequent risk of GDM and gestational hypertension. Patients, Design and Setting: We measured serum PAPP-A concentrations around week 15 of pregnancy and related these to indices derived from week 28 oral glucose tolerance tests (OGTT) and blood pressures across pregnancy in the Cambridge Baby Growth Study cohort...
March 13, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28323510/positive-association-between-the-changes-in-chemerin-and-adiponectin-levels-after-weight-reduction
#19
Hyun-Young Shin, Sohee Park, Ji Won Lee
PURPOSE: Adiponectin and chemerin have been reported their associations with insulin resistance and chronic inflammation. However, the relationship between adiponectin and chemerin themselves has not been fully elucidated. Therefore, we investigated the effects of changes in adiponectin and chemerin levels after a weight intervention. MATERIALS AND METHODS: We recruited 136 healthy overweight or obese subjects from 2006 to 2009 and provided all participants lifestyle modification therapy with diet consultations over 16 weeks...
March 21, 2017: Endocrine Research
https://www.readbyqxmd.com/read/28323503/add-on-dpp-4-inhibitor-alogliptin-alone-or-in-combination-with-pioglitazone-improved-%C3%AE-cell-function-and-insulin-sensitivity-in-metformin-treated-pcos
#20
Mojca Jensterle, Katja Goricar, Andrej Janez
PURPOSE: Impaired β-cell function remains unaddressed in PCOS. The aim of the study was to evaluate whether dipeptidyl peptidase-4 (DPP-4) inhibitor alogliptin (ALO) alone or in combination with pioglitazone (PIO) improves β-cell function along with insulin resistance (IR) in metformin (MET) treated obese women with PCOS with persistent IR. MATERIALS AND METHODS: In 12-week randomized study, ALO 25 mg QD (n=15) or ALO 25 mg QD and PIO 30 mg QD (n=15) was added to MET 1000 mg BID in PCOS women (aged 34...
March 21, 2017: Endocrine Research
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