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Pulmonary artery hypertension

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https://www.readbyqxmd.com/read/27920514/usefulness-of-the-6-minute-walk-test-as-a-screening-test-for-pulmonary-arterial-enlargement-in-copd
#1
Yutaro Oki, Masahiro Kaneko, Yukari Fujimoto, Hideki Sakai, Shogo Misu, Yuji Mitani, Takumi Yamaguchi, Hisafumi Yasuda, Akira Ishikawa
PURPOSE: Pulmonary hypertension and exercise-induced oxygen desaturation (EID) influence acute exacerbation of COPD. Computed tomography (CT)-detected pulmonary artery (PA) enlargement is independently associated with acute COPD exacerbations. Associations between PA to aorta (PA:A) ratio and EID in patients with COPD have not been reported. We hypothesized that the PA:A ratio correlated with EID and that results of the 6-minute walk test (6MWT) would be useful for predicting the risk associated with PA:A >1...
2016: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/27919930/mir-17-20-controls-prolyl-hydroxylase-2-phd2-hypoxia-inducible-factor-1-hif1-to-regulate-pulmonary-artery-smooth-muscle-cell-proliferation
#2
Tianji Chen, Qiyuan Zhou, Haiyang Tang, Melike Bozkanat, Jason X-J Yuan, J Usha Raj, Guofei Zhou
BACKGROUND: Previously we found that smooth muscle cell (SMC)-specific knockout of miR-17~92 attenuates hypoxia-induced pulmonary hypertension. However, the mechanism underlying miR-17~92-mediated pulmonary artery SMC (PASMC) proliferation remains unclear. We sought to investigate whether miR-17~92 regulates hypoxia-inducible factor (HIF) activity and PASMC proliferation via prolyl hydroxylases (PHDs). METHODS AND RESULTS: We show that hypoxic sm-17~92(-/-) mice have decreased hematocrit, red blood cell counts, and hemoglobin contents...
December 5, 2016: Journal of the American Heart Association
https://www.readbyqxmd.com/read/27919660/a-comparison-of-vasodilation-mode-among-selexipag-ns-304-2-4-5-6-diphenylpyrazin-2-yl-isopropyl-amino-butoxy-n-methylsulfonyl-acetamide-its-active-metabolite-mre-269-and-various-prostacyclin-receptor-agonists-in-rat-porcine-and-human-pulmonary-arteries
#3
Chiaki Fuchikami, Kohji Murakami, Koyuki Tajima, Junko Homan, Keiji Kosugi, Kazuya Kuramoto, Michiko Oka, Keiichi Kuwano
Selexipag (NS-304; [2-{4-[(5,6-diphenylpyrazin-2-yl)(isopropyl)amino]butoxy}-N- (methylsulfonyl)acetamide]) is a novel, orally available non-prostanoid prostacyclin receptor (IP receptor) agonist that has recently been approved for the treatment of pulmonary arterial hypertension (PAH). We examined the effect of the active metabolite of selexipag, MRE-269, and IP receptor agonists that are currently available as PAH therapeutic drugs on the relaxation of rat, porcine and human pulmonary artery. cAMP formation in human pulmonary artery smooth muscle cells was induced by all test compounds (MRE-269, epoprostenol, iloprost, treprostinil and beraprost sodium) and suppressed by IP receptor antagonists (CAY10441 and 2-[4-(1H-indol-4-yloxymethyl)-benzyloxycarbonylamino]-3-phenyl-propionic acid)...
December 2, 2016: European Journal of Pharmacology
https://www.readbyqxmd.com/read/27919209/evaluation-of-echocardiographic-abnormalities-in-hiv-positive-patients-treated-with-antiretroviral-medications
#4
Sina Moradmand Badie, Mehrnaz Rasoulinejad, Mohammadreza Salehi, Hamid Emadi Kochak, SeyedAhmad SeyedAlinaghi, Seyed Ali Dehghan Manshadi, Fatemeh Jahanjo Amin Abad, Banafsheh Moradmand Badie
BACKGROUND: Echocardiography is a reliable means for the diagnosis of functional and valvular diseases of the heart in HIV positive and HIV negative patients. The current study was to evaluate echocardiographic abnormalities in HIV positive patients under an antiretroviral therapy (ART) program in Tehran, Imam Khomeini Hospital, Iran. METHODS: This is a descriptive cross-sectional study, conducted among 231 HIV positive patients under ART. All HIV positive patients including 150 men (65%) and 81 women (35%) (mean age of 41 years) were assessed by trans-thoracic echocardiography (TTE) in Imam Khomeini Hospital, over the period from 2013 to 2014...
December 5, 2016: Infectious Disorders Drug Targets
https://www.readbyqxmd.com/read/27916219/coupling-factor-6-is-upregulated-in-monocrotaline-induced-pulmonary-arterial-hypertension-in-rats
#5
Nannan Li, Jie Yin, Weidong Cai, Jingjing Liu, Na Zhang, Suhua Yan, Lucheng Song, Xiaolu Li
BACKGROUND: Pulmonary arterial hypertension (PAH) is a rare and fatal disease. The prostacyclin (PGI2) pathway is a well-known therapeutic target for PAH. As a novel vasoconstrictive peptide, coupling factor 6 (CF6) has been recognized as the only endogenous inhibitor of PGI2. However, the relationship between CF6 and PAH is still unknown. In this study, we investigated the involvement of CF6 in PAH in rats. METHODS: A total of 80 Sprague-Dawley rats were randomly divided into 2 groups: a control group (with saline intraperitoneally) and a monocrotaline (MCT)-treated group (with MCT 60mg/kg intraperitoneal injection)...
December 2016: American Journal of the Medical Sciences
https://www.readbyqxmd.com/read/27916210/heart-type-fatty-acid-binding-protein-in-the-assessment-of-acute-pulmonary-embolism
#6
Hai-Yan Qian, Ji Huang, Yue-Jin Yang, Yan-Min Yang, Zhi-Zhong Li, Jing-Mei Zhang
OBJECTIVE: To explore the predictive value of heart-type fatty acid binding protein (H-FABP) in the stratification and prognosis of patients with acute pulmonary embolism (APE). METHODS: According to risk stratification, 69 patients with APE admitted into the emergency department within 24 hours after onset were divided into the following 3 groups: high-risk group, moderate-risk group and low-risk group. H-FABP- and cardiac troponin I (cTNI)-positive rates of all groups were analyzed and compared, and the correlation between major adverse events (death, endotracheal intubation and cardiopulmonary resuscitation) and the cardiac markers (heart rate, arterial partial pressure of oxygen, right ventricular dimension, pulmonary arterial pressure, etc...
December 2016: American Journal of the Medical Sciences
https://www.readbyqxmd.com/read/27914611/restoration-of-uridine-5-triphosphate-suppressed-delayed-rectifying-k-currents-by-an-no-activator-kmup-1-involves-rhoa-rho-kinase-signaling-in-pulmonary-artery-smooth-muscle-cells
#7
Zen-Kong Dai, Chang-Ling Kao, Su-Ling Hsieh, Ing-Jun Chen, Bin-Nan Wu
We have demonstrated that KMUP-1 (7-[2-[4-(2-chlorobenzene)piperazinyl]ethyl]-1,3-dimethylxanthine) blunts monocrotaline-induced pulmonary arterial hypertension by altering Ca(2+) sensitivity, K(+)-channel function, endothelial nitric oxide synthase activity, and RhoA/Rho kinase (ROCK) expression. This study further investigated whether KMUP-1 impedes uridine 5'-triphosphate (UTP)-inhibited delayed rectifying K(+) (KDR) current in rat pulmonary arteries involved the RhoA/ROCK signaling. Pulmonary artery smooth muscle cells (PASMCs) were enzymatically dissociated from rat pulmonary arteries...
December 2016: Kaohsiung Journal of Medical Sciences
https://www.readbyqxmd.com/read/27913427/intermittent-hypoxia-during-recovery-from-neonatal-hyperoxic-lung-injury-causes-long-term-impairment-of-alveolar-development-a-new-rat-model-of-bpd
#8
Anastasiya Mankouski, Crystal Kantores, Mathew J Wong, Julijana Ivanovska, Amish Jain, Eric J Benner, Stanley N Mason, A Keith Tanswell, Richard L Auten, Robert P Jankov
Bronchopulmonary dysplasia (BPD) is a chronic lung injury characterized by impaired alveologenesis that may persist into adulthood. Rat models of BPD using varying degrees of hyperoxia to produce injury either cause early mortality or spontaneously recover following removal of the inciting stimulus, thus limiting clinical relevance. We sought to refine an established rat model induced by exposure to 60% O2 from birth by following hyperoxia with intermittent hypoxia (IH). Rats exposed from birth to air or 60% O2 until day 14 were recovered in air with or without IH (FiO2 = 0...
December 2, 2016: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/27913300/suppression-of-nadph-oxidase-attenuates-hypoxia-induced-dysfunctions-of-endothelial-progenitor-cells
#9
Bin Liu, Kai-Di Ren, Jing-Jie Peng, Tao Li, Xiu-Ju Luo, Chengming Fan, Jin-Fu Yang, Jun Peng
NADPH oxidases (NOX) - derived reactive oxygen species (ROS) contribute to oxidative injury in hypoxia-induced pulmonary arterial hypertension. This study aims to evaluate the status of NOX in endothelial progenitor cells (EPCs) under hypoxic condition and to determine whether NOX inhibitors could attenuate hypoxia-induced dysfunctions of EPCs. EPCs were isolated from peripheral blood of SD rats and subjected to hypoxia (O2/N2/CO2, 1/94/5) for 24 h. The cells were collected for β-galactosidase or Hoechst staining, or for functional analysis (migration, adhesion and tube formation)...
November 29, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27913006/noninvasive-prediction-of-pulmonary-artery-pressure-and-vascular-resistance-by-using-cardiac-magnetic-resonance-indices
#10
Zhang Zhang, Meng Wang, Zhenwen Yang, Fan Yang, Dong Li, Tielian Yu, Ningnannan Zhang
BACKGROUND: Cardiac magnetic resonance (CMR) has promise of being able to provide frequent cardiac morphology and function evaluations noninvasively for repeated follow-ups of pulmonary arterial hypertension (PAH) patients after the initial right heart catheterization (RHC) diagnosis. By using the noninvasive CMR indices, the present study aimed to formulate and validate a prediction model of mean pulmonary artery pressure (mPAP) and pulmonary vascular resistance (PVR). METHODS: Both Derivation Cohort (N=25) and Validation Cohort (N=25) of PAH patients underwent CMR and RHC within one week...
October 29, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27912199/right-ventricular-dyssynchrony-predicts-clinical-outcomes-in-patients-with-pulmonary-hypertension
#11
Mitsushige Murata, Toshimitsu Tsugu, Takashi Kawakami, Masaharu Kataoka, Yugo Minakata, Jin Endo, Hikaru Tsuruta, Yuji Itabashi, Yuichiro Maekawa, Keiichi Fukuda
BACKGROUND: RV dyssynchrony has been described in patients with pulmonary hypertension (PH) and is an independent predictor of clinical worsening; however, the optimal method for measuring RV dyssynchrony has not been fully established. This study aimed to investigate whether RV dyssynchrony is correlated with hemodynamics and prognosis in PH patients and to identify the best parameter for evaluating RV dyssynchrony. METHODS: This study assessed 100 PH patients, measuring mean pulmonary artery pressure (mPAP), pulmonary vascular resistance (PVR), and cardiac index (CI) by right heart catheterization (RHC)...
November 14, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27912147/inhibition-of-endocan-attenuates-monocrotaline-induced-connective-tissue-disease-related-pulmonary-arterial-hypertension
#12
Haiyan Zhao, Yunxin Xue, Yun Guo, Yue Sun, Dongmei Liu, Xiaofei Wang
Connective tissue disease related pulmonary arterial hypertension (CTD-PAH) is characterized by vascular remodeling, endothelial dysfunction and inflammation. Endocan is a novel endothelial dysfunction marker. The aim of the present study was to investigate the role of endocan in CTD-PAH. Monocrotaline (MCT)-induced PAH rats were used as the CTD-PAH model. Short hairpin RNA packed in a lentiviral vector used to inhibit endocan expression was intratracheally instilled in rats prior to the MCT injection. Endocan was found to be increased in the serum and lung of MCT-induced PAH rats...
November 29, 2016: International Immunopharmacology
https://www.readbyqxmd.com/read/27910060/microrna-delivery-strategies-to-the-lung-in-a-model-of-pulmonary-hypertension
#13
Lin Deng, Andrew H Baker, Angela C Bradshaw
Pulmonary arterial hypertension (PAH) is characterized by enhanced proliferation of pulmonary artery smooth muscle cells and endothelial cells associated with obliteration of small pulmonary arterioles and formation of plexiform lesions. To date, no curative treatments have been identified for pulmonary arterial hypertension. There are various therapeutic options, including conventional medical therapies and oral, subcutaneous, intravenous, and inhalation delivery. We have previously shown that miR-143/145 knockout can prevent the development of chronic hypoxia-induced pulmonary hypertension (PH) in mice...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27908982/retraction-transgenic-expression-of-human-matrix-metalloproteinase-1-attenuates-pulmonary-arterial-hypertension-in-mice
#14
Joseph George, Jie Sun, Jeanine D'Armiento
No abstract text is available yet for this article.
January 1, 2017: Clinical Science (1979-)
https://www.readbyqxmd.com/read/27908301/utility-of-b-type-natriuretic-peptides-in-the-assessment-of-patients-with-systemic-sclerosis-associated-pulmonary-hypertension-in-the-pharos-registry
#15
Lorinda Chung, Robert M Fairchild, Daniel E Furst, Shufeng Li, Firas Alkassab, Marcy B Bolster, Mary Ellen Csuka, Chris T Derk, Robyn T Domsic, Aryeh Fischer, Tracy Frech, Mardi Gomberg-Maitland, Jessica K Gordon, Monique Hinchcliff, Vivien Hsu, Laura K Hummers, Dinesh Khanna, Thomas A Jr Medsger, Jerry A Molitor, Ivana R Preston, Elena Schiopu, Lee Shapiro, Faye Hant, Richard Silver, Robert Simms, John Varga, Virginia D Steen, Roham T Zamanian
OBJECTIVES: To assess the utility of B-type natriuretic peptide (BNP) and N-terminal pro-BNP (NT-proBNP) in detecting and monitoring pulmonary hypertension (PH) in systemic sclerosis (SSc). METHODS: PHAROS is a multicenter prospective cohort of SSc patients at high risk for developing pulmonary arterial hypertension (SSc-AR-PAH) or with a definitive diagnosis of SSc-PH. We evaluated 1) the sensitivity and specificity of BNP≥64 and NT-proBNP≥210 pg/mL for the detection of SSc-PAH and/ or SSc-PH in the SSc-AR-PAH population; 2) baseline and longitudinal BNP and NT-proBNP levels as predictors of progression to SSc-PAH and/or SSc-PH; 3) baseline BNP≥180, NT-proBNP≥553 pg/mL, and longitudinal changes in BNP and NT-proBNP as predictors of mortality in SSc-PH diagnosed patients...
November 10, 2016: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/27908251/effects-of-an-outpatient-service-rehabilitation-programme-in-patients-affected-by-pulmonary-arterial-hypertension-an-observational-study
#16
Maurizio Bussotti, Paola Gremigni, Roberto Fe Pedretti, Patrycja Kransinska, Silvia Di Marco, Paola Corbo, Giovanni Marchese, Paolo Totaro, Marinella Sommaruga
BACKGROUND: Pulmonary arterial hypertension (PAH) is a rare disease characterised by a severe impairment of functional status and quality of life (QoL). Use of rehabilitative programmes may help to improve outcomes. The aim of this pre/post test case series was to evaluate the impact of a training program, including sessions of aerobic and resistance exercise, inspiratory muscle reinforcement, slow breathing, relaxation, and psychological support, on functional outcomes. METHODS: Fifteen patients affected by PAH, in World Health Organization (WHO) Functional Class (FC) II or III and in stable clinical condition, were included in a 4-week cardiorespiratory training programme conducted in outpatient service...
November 30, 2016: Cardiovascular & Hematological Disorders Drug Targets
https://www.readbyqxmd.com/read/27906717/spectrum-of-postoperative-complications-in-pulmonary-hypertension-and-obesity-hypoventilation-syndrome
#17
Roop K Kaw
PURPOSE OF REVIEW: The purpose of this review is to identify chronic pulmonary conditions which may often not be recognized preoperatively especially before elective noncardiac surgery and which carry the highest risk of perioperative morbidity and mortality. RECENT FINDINGS: This review discusses some of the most recent studies that highlight the perioperative complications, and their prevention and management strategies. SUMMARY: Pulmonary hypertension is a well recognized risk factor for postoperative complications after cardiac surgery but the literature surrounding noncardiac surgery is sparse...
November 30, 2016: Current Opinion in Anaesthesiology
https://www.readbyqxmd.com/read/27903665/pregnancy-in-pulmonary-arterial-hypertension
#18
REVIEW
Karen M Olsson, Richard Channick
Despite advanced therapies, maternal mortality in women with pulmonary arterial hypertension (PAH) remains high in pregnancy and is especially high during the post-partum period. However, recent data indicates that morbidity and mortality during pregnancy and after birth have improved for PAH patients. The current European Society of Cardiology/European Respiratory Society guidelines recommend that women with PAH should not become pregnant. Therefore, the risks associated with pregnancy must be emphasised and counselling offered to women at the time of PAH diagnosis and to women with PAH who become pregnant...
December 2016: European Respiratory Review: An Official Journal of the European Respiratory Society
https://www.readbyqxmd.com/read/27903664/practical-considerations-for-therapies-targeting-the-prostacyclin-pathway
#19
REVIEW
Harrison W Farber, Wendy Gin-Sing
Therapies that target the prostacyclin pathway play a key role in the treatment of both early- and late-stage pulmonary arterial hypertension, and provide significant clinical benefits for patients. A number of agents have been approved, which are administered via intravenous, subcutaneous, inhaled or oral routes. The use of these therapies is associated with practical challenges, relating to the need for up-titration and their routes of administration. We discuss here a number of measures that can be taken to support patients and healthcare professionals in order to address the complexities of using these therapies and to encourage compliance...
December 2016: European Respiratory Review: An Official Journal of the European Respiratory Society
https://www.readbyqxmd.com/read/27903663/beyond-a-single-pathway-combination-therapy-in-pulmonary-arterial-hypertension
#20
REVIEW
Olivier Sitbon, Sean Gaine
There is a strong rationale for combining therapies to simultaneously target three of the key pathways implicated in the pathogenesis of pulmonary arterial hypertension (PAH). Evidence to support this strategy is growing, and a number of studies have demonstrated that combination therapy, administered as either a sequential or an initial regimen, can improve long-term outcomes in PAH. Dual combination therapy with a phosphodiesterase-5 inhibitor and an endothelin receptor antagonist is the most widely utilised combination regimen...
December 2016: European Respiratory Review: An Official Journal of the European Respiratory Society
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