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https://www.readbyqxmd.com/read/28107310/the-renin-inhibitor-aliskiren-protects-rat-lungs-from-the-histopathologic-effects-of-fat-embolism
#1
Amanda N Fletcher, Agostino Molteni, Rakesh Ponnapureddy, Chirag Patel, Mark Pluym, Alan M Poisner
BACKGROUND: Fat embolism (FE) and the consequent FE syndrome occurring after trauma or surgery can lead to serious pulmonary injury, including ARDS and death. Current treatment of FE syndrome is limited to supportive therapy. We have shown in a rat model that the renin angiotensin system plays a significant role in the pathophysiology of FE because drugs interfering with the renin angiotensin system, captopril and losartan reduce the histopathologic pulmonary damage. The purpose of the current study was to determine if inhibition of renin by aliskiren, an FDA-approved drug for treating hypertension, would produce effective protection in the same model...
February 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28104770/decline-in-cardiovascular-mortality-possible-causes-and-implications
#2
REVIEW
George A Mensah, Gina S Wei, Paul D Sorlie, Lawrence J Fine, Yves Rosenberg, Peter G Kaufmann, Michael E Mussolino, Lucy L Hsu, Ebyan Addou, Michael M Engelgau, David Gordon
If the control of infectious diseases was the public health success story of the first half of the 20th century, then the decline in mortality from coronary heart disease and stroke has been the success story of the century's past 4 decades. The early phase of this decline in coronary heart disease and stroke was unexpected and controversial when first reported in the mid-1970s, having followed 60 years of gradual increase as the US population aged. However, in 1978, the participants in a conference convened by the National Heart, Lung, and Blood Institute concluded that a significant recent downtick in coronary heart disease and stroke mortality rates had definitely occurred, at least in the US Since 1978, a sharp decline in mortality rates from coronary heart disease and stroke has become unmistakable throughout the industrialized world, with age-adjusted mortality rates having declined to about one third of their 1960s baseline by 2000...
January 20, 2017: Circulation Research
https://www.readbyqxmd.com/read/28103851/cystic-fibrosis-physicians-perspectives-on-the-timing-of-referral-for-lung-transplant-evaluation-a-survey-of-physicians-in-the-united-states
#3
Kathleen J Ramos, Ranjani Somayaji, Erika D Lease, Christopher H Goss, Moira L Aitken
BACKGROUND: Prior studies reveal that a significant proportion of patients with cystic fibrosis (CF) and advanced lung disease are not referred for lung transplant (LTx) evaluation. We sought to assess expert CF physician perspectives on the timing of LTx referral and investigate their LTx knowledge. METHODS: We developed an online anonymous survey that was distributed by the Cystic Fibrosis Foundation (CFF) to the medical directors of all CFF-accredited care centers in the United States in 2015...
January 19, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/28101803/lung-retransplantation-in-an-adult-13%C3%A2-years-after-single-lobar-transplant-in-childhood
#4
Seiichiro Sugimoto, Shinji Otani, Takashi Ohki, Takeshi Kurosaki, Kentaroh Miyoshi, Masaomi Yamane, Shinichiro Miyoshi, Takahiro Oto
Single living-donor lobar lung transplantation provides acceptable results for critically ill children; however, an additional lung transplantation may be required in the future as the recipient grows. We describe a case of successful lung retransplantation in a grown-up patient after single lobar lung transplantation in childhood. A 23-year-old man underwent bilateral cadaveric lung retransplantation for chronic lung allograft dysfunction 13 years after right single living-donor lobar transplantation for idiopathic pulmonary arterial hypertension performed at the age of 10 years...
January 18, 2017: General Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28100891/reverse-right-ventricular-remodeling-after-lung-transplantation-in-patients-with-pulmonary-arterial-hypertension-under-combination-therapy-of-targeted-medical-drugs
#5
Toshihiro Sarashina, Kazufumi Nakamura, Satoshi Akagi, Takahiro Oto, Hiroki Oe, Kentaro Ejiri, Koji Nakagawa, Nobuhiro Nishii, Hiromi Matsubara, Motomu Kobayashi, Hiroshi Morimatsu, Shinichiro Miyoshi, Hiroshi Ito
BACKGROUND: Patients with pulmonary arterial hypertension (PAH) are currently treated with combination therapy of PAH-targeted drugs. Reverse right ventricular (RV) remodeling after lung transplantation (LTx) in patients with end-stage PAH despite combination therapy of PAH-targeted drugs has not been fully elucidated.Methods and Results:A total of 136 patients, including 32 with PAH, underwent LTx from 1998 to 2014. We enrolled 12 consecutive patients with PAH treated with combination therapy of PAH-targeted drugs who underwent LTx and retrospectively analyzed the temporal and serial changes in hemodynamics and echocardiography before LTx and at 3 and 12 months after LTx...
January 18, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28100330/-protective-effects-of-heat-shock-protein-70-against-hypoxic-pulmonary-hypertension-in-neonatal-rats
#6
Le Wang, Hai-Yan Wu, Ming-Xia Li
OBJECTIVE: To investigate the protective effect of heat shock protein 70 (HSP70) against hypoxic pulmonary hypertension (HPH) in neonatal rats. METHODS: A total of 128 neonatal rats were randomly divided into blank control group, HPH model group, empty virus group, and HSP70 group, with 32 rats in each group. Before the establishment of an HPH model, the rats in the blank control group and HPH model group were given caudal vein injection of 5 μL sterile saline, those in the empty virus group were given caudal vein injection of 5 μL Ad-GFP (1 010 PFU/mL), and those in the HSP70 group were given caudal vein injection of 5 μL Ad-HSP70 (1 010 PFU/mL)...
January 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/28096284/pulmonary-vascular-and-cardiac-impairment-in-interstitial-lung-disease
#7
REVIEW
Marios Panagiotou, Alistair C Church, Martin K Johnson, Andrew J Peacock
Pulmonary vascular and cardiac impairment is increasingly appreciated as a major adverse factor in the natural history of interstitial lung disease. This clinically orientated review focuses on the current concepts in the pathogenesis, pathophysiology and implications of the detrimental sequence of increased pulmonary vascular resistance, pre-capillary pulmonary hypertension and right heart failure in interstitial lung disease, and provides guidance on its management.
January 2017: European Respiratory Review: An Official Journal of the European Respiratory Society
https://www.readbyqxmd.com/read/28092203/machine-learning-of-three-dimensional-right-ventricular-motion-enables-outcome-prediction-in-pulmonary-hypertension-a-cardiac-mr-imaging-study
#8
Timothy J W Dawes, Antonio de Marvao, Wenzhe Shi, Tristan Fletcher, Geoffrey M J Watson, John Wharton, Christopher J Rhodes, Luke S G E Howard, J Simon R Gibbs, Daniel Rueckert, Stuart A Cook, Martin R Wilkins, Declan P O'Regan
Purpose To determine if patient survival and mechanisms of right ventricular failure in pulmonary hypertension could be predicted by using supervised machine learning of three-dimensional patterns of systolic cardiac motion. Materials and Methods The study was approved by a research ethics committee, and participants gave written informed consent. Two hundred fifty-six patients (143 women; mean age ± standard deviation, 63 years ± 17) with newly diagnosed pulmonary hypertension underwent cardiac magnetic resonance (MR) imaging, right-sided heart catheterization, and 6-minute walk testing with a median follow-up of 4...
January 16, 2017: Radiology
https://www.readbyqxmd.com/read/28090303/genotype-phenotype-effects-of-bmpr2-mutations-on-disease-severity-in-mouse-models-of-pulmonary-hypertension
#9
Andrea L Frump, Arunima Datta, Sampa Ghose, James West, Mark P de Caestecker
More than 350 mutations in the type-2 BMP (bone morphogenetic protein) receptor, BMPR2, have been identified in patients with heritable pulmonary arterial hypertension (HPAH). However, only 30% of BMPR2 mutation carriers develop PAH, and we cannot predict which of these carriers will develop clinical disease. One possibility is that the nature of the BMPR2 mutation affects disease severity. This hypothesis has been difficult to test clinically, given the rarity of HPAH and the complexity of the confounding genetic and environmental risk factors...
December 2016: Pulmonary Circulation
https://www.readbyqxmd.com/read/28090302/three-dimensional-micro-computed-tomography-analysis-of-the-lung-vasculature-and-differential-adipose-proteomics-in-the-sugen-hypoxia-rat-model-of-pulmonary-arterial-hypertension
#10
Kelly J Shields, Kostas Verdelis, Michael J Passineau, Erin M Faight, Lee Zourelias, Changgong Wu, Rong Chong, Raymond L Benza
Pulmonary arterial hypertension (PAH) is a rare disease characterized by significant vascular remodeling. The obesity epidemic has produced great interest in the relationship between small visceral adipose tissue depots producing localized inflammatory conditions, which may link metabolism, innate immunity, and vascular remodeling. This study used novel micro computed tomography (microCT) three-dimensional modeling to investigate the degree of remodeling of the lung vasculature and differential proteomics to determine small visceral adipose dysfunction in rats with severe PAH...
December 2016: Pulmonary Circulation
https://www.readbyqxmd.com/read/28090300/bk-channels-in-rat-and-human-pulmonary-smooth-muscle-cells-are-bk%C3%AE-%C3%AE-1-functional-complexes-lacking-the-oxygen-sensitive-stress-axis-regulated-exon-insert
#11
Neil D Detweiler, Li Song, Samantha J McClenahan, Rachel J Versluis, Sujay V Kharade, Richard C Kurten, Sung W Rhee, Nancy J Rusch
A loss of K(+) efflux in pulmonary arterial smooth muscle cells (PASMCs) contributes to abnormal vasoconstriction and PASMC proliferation during pulmonary hypertension (PH). Activation of high-conductance Ca(2+)-activated (BK) channels represents a therapeutic strategy to restore K(+) efflux to the affected PASMCs. However, the properties of BK channels in PASMCs-including sensitivity to BK channel openers (BKCOs)-are poorly defined. The goal of this study was to compare the properties of BK channels between PASMCs of normoxic (N) and chronic hypoxic (CH) rats and then explore key findings in human PASMCs...
December 2016: Pulmonary Circulation
https://www.readbyqxmd.com/read/28090297/exhaled-nitric-oxide-in-pulmonary-arterial-hypertension-associated-with-systemic-sclerosis
#12
Zeling Cao, Stephen C Mathai, Laura K Hummers, Ami A Shah, Fredrick M Wigley, Noah Lechtzin, Paul M Hassoun, Reda E Girgis
The fractional exhaled concentration of nitric oxide (FENO) has been shown to be reduced in idiopathic pulmonary arterial hypertension (PAH) but has not been adequately studied in PAH associated with systemic sclerosis (SSc). We measured FENO at an expiratory flow rate of 50 mL/s in 21 treatment-naive patients with SSc-associated PAH (SSc-PAH), 94 subjects with SSc without pulmonary involvement, and 84 healthy volunteers. Measurements of FENO at additional flow rates of 100, 150, and 250 mL/s were obtained to derive the flow-independent nitric oxide exchange parameters of maximal airway flux (J'awNO) and steady-state alveolar concentration (CANO)...
December 2016: Pulmonary Circulation
https://www.readbyqxmd.com/read/28090294/the-effects-of-pulmonary-vasodilating-agents-on-right-ventricular-parameters-in-severe-group-3-pulmonary-hypertension-a-pilot-study
#13
Takahiro Sato, Ichizo Tsujino, Ayako Sugimoto, Toshitaka Nakaya, Taku Watanabe, Hiroshi Ohira, Masaru Suzuki, Satoshi Konno, Noriko Oyama-Manabe, Masaharu Nishimura
Pulmonary arterial hypertension (PAH)-approved vasodilators improve right ventricular (RV) function in patients with PAH. However, whether PAH-approved drugs ameliorate RV morphology and function in lung disease-associated pulmonary hypertension (lung-PH) remains unclear. We aimed to prospectively evaluate the changes in RV volume and ejection fraction (RVEF) in 14 consecutive severe lung-PH patients treated with PAH-approved vasodilators. Severe lung-PH was defined as a mean pulmonary arterial pressure (MPAP) of ≥35 mmHg or an MPAP of ≥25 mmHg with a cardiac index (L/min/m(2)) of <2...
December 2016: Pulmonary Circulation
https://www.readbyqxmd.com/read/28090290/shared-gene-expression-patterns-in-mesenchymal-progenitors-derived-from-lung-and-epidermis-in-pulmonary-arterial-hypertension-identifying-key-pathways-in-pulmonary-vascular-disease
#14
Christa Gaskill, Shennea Marriott, Sidd Pratap, Swapna Menon, Lora K Hedges, Joshua P Fessel, Jonathan A Kropski, DeWayne Ames, Lisa Wheeler, James E Loyd, Anna R Hemnes, Dennis R Roop, Dwight J Klemm, Eric D Austin, Susan M Majka
Rapid access to lung-derived cells from stable subjects is a major challenge in the pulmonary hypertension field, given the relative contraindication of lung biopsy. In these studies, we sought to demonstrate the importance of evaluating a cell type that actively participates in disease processes, as well as the potential to translate these findings to vascular beds in other nonlung tissues, in this instance perivascular skin mesenchymal cells (MCs). We utilized posttransplant or autopsy lung explant-derived cells (ABCG2-expressing mesenchymal progenitor cells [MPCs], fibroblasts) and skin-derived MCs to test the hypothesis that perivascular ABCG2 MPCs derived from pulmonary arterial hypertension (PAH) patient lung and skin would express a gene profile reflective of ongoing vascular dysfunction...
December 2016: Pulmonary Circulation
https://www.readbyqxmd.com/read/28090288/expression-profiling-elucidates-a-molecular-gene-signature-for-pulmonary-hypertension-in-sarcoidosis
#15
Sunit Singla, Tong Zhou, Kamran Javaid, Taimur Abbasi, Nancy Casanova, Wei Zhang, Shwu-Fan Ma, Michael S Wade, Imre Noth, Nadera J Sweiss, Joe G N Garcia, Roberto F Machado
Pulmonary hypertension (PH), when it complicates sarcoidosis, carries a poor prognosis, in part because it is difficult to detect early in patients with worsening respiratory symptoms. Pathogenesis of sarcoidosis occurs via incompletely characterized mechanisms that are distinct from the mechanisms of pulmonary vascular remodeling well known to occur in conjunction with other chronic lung diseases. To address the need for a biomarker to aid in early detection as well as the gap in knowledge regarding the mechanisms of PH in sarcoidosis, we used genome-wide peripheral blood gene expression analysis and identified an 18-gene signature capable of distinguishing sarcoidosis patients with PH (n = 8), sarcoidosis patients without PH (n = 17), and healthy controls (n = 45)...
December 2016: Pulmonary Circulation
https://www.readbyqxmd.com/read/28089997/the-impact-of-age-and-sex-on-in-hospital-outcomes-of-chronic-total-occlusion-percutaneous-coronary-intervention
#16
Aris Karatasakis, Rahel Iwnetu, Barbara A Danek, Dimitri Karmpaliotis, Khaldoon Alaswad, Farouc A Jaffer, Robert W Yeh, David E Kandzari, Nicholas J Lembo, Mitul Patel, Ehtisham Mahmud, William L Lombardi, R Michael Wyman, J Aaron Grantham, Anthony H Doing, Catalin Toma, James W Choi, Barry F Uretsky, Jeffrey W Moses, Ajay J Kirtane, Ziad A Ali, Manish Parikh, Judit Karacsonyi, Bavana V Rangan, Craig A Thompson, Subhash Banerjee, Emmanouil S Brilakis
OBJECTIVES: We sought to determine the effect of age and sex on procedural outcomes and efficiency of chronic total occlusion (CTO) percutaneous coronary intervention (PCI). METHODS: We examined the clinical and angiographic characteristics and outcomes of 1675 CTO-PCIs performed in 1644 patients between 2012 and 2016 at 15 United States centers. RESULTS: Mean age was 65.3 ± 10 years and 1408 (86%) were men. Overall technical and procedural success rates were 88% and 87%, respectively...
January 15, 2017: Journal of Invasive Cardiology
https://www.readbyqxmd.com/read/28089974/cardiopulmonary-disease-development-in-anti-rna-polymerase-iii-positive-systemic-sclerosis-comparative-analyses-from-an-unselected-prospective-patient-cohort
#17
Anna-Maria Hoffmann-Vold, Øyvind Midtvedt, Anders H Tennøe, Torhild Garen, May Brit Lund, Trond M Aaløkken, Arne K Andreassen, Fadi Elhage, Cathrine Brunborg, Eli Taraldsrud, Øyvind Molberg
OBJECTIVE: Extensive skin disease and renal crisis are hallmarks of anti-RNA polymerase III (RNAP)-positive systemic sclerosis (SSc), while lung and heart involvement data are conflicting. Here, the aims were to perform time-course analyses of interstitial lung disease (ILD) and pulmonary hypertension (PH) in the RNAP subset of a prospective unselected SSc cohort and to use the other autoantibody subsets as comparators. METHODS: The study cohort included 279 patients with SSc from the observational Oslo University Hospital cohort with complete data on (1) SSc-related autoantibodies, (2) paired, serial analyses of lung function and fibrosis by computed tomography, and (3) PH verified by right heart catheterization...
January 15, 2017: Journal of Rheumatology
https://www.readbyqxmd.com/read/28089339/discovery-of-a-murine-model-of-clinical-pah-mission-impossible
#18
REVIEW
Zhiyu Dai, You-Yang Zhao
Pulmonary arterial hypertension (PAH) is a lung vascular disease characterized with a progressive increase of pulmonary vascular resistance and obliterative pulmonary vascular remodeling resulting in right heart failure and premature death. In this brief review, we document the recent advances in identifying genetically modified murine models of PH, with a focus on the recent discovery of the mouse model of Tie2 Cre-mediated deletion of prolyl hydroxylase 2, which exhibits progressive obliterative vascular remodeling, severe PAH, and right heart failure, thus recapitulating many of the features of clinical PAH...
December 15, 2016: Trends in Cardiovascular Medicine
https://www.readbyqxmd.com/read/28087362/clinical-phenotypes-and-outcomes-of-heritable-and-sporadic-pulmonary-veno-occlusive-disease-a-population-based-study
#19
David Montani, Barbara Girerd, Xavier Jaïs, Marilyne Levy, David Amar, Laurent Savale, Peter Dorfmüller, Andrei Seferian, Edmund M Lau, Mélanie Eyries, Jérôme Le Pavec, Florence Parent, Damien Bonnet, Florent Soubrier, Elie Fadel, Olivier Sitbon, Gérald Simonneau, Marc Humbert
BACKGROUND: Bi-allelic mutations of the EIF2AK4 gene cause heritable pulmonary veno-occlusive disease and/or pulmonary capillary haemangiomatosis (PVOD/PCH). We aimed to assess the effect of EIF2AK4 mutations on the clinical phenotypes and outcomes of PVOD/PCH. METHODS: We did a population-based study using clinical, functional, and haemodynamic data from the registry of the French Pulmonary Hypertension Network. We reviewed the clinical data and outcomes from all patients referred to the French Referral Centre (Pulmonary Department, Hospital Kremlin-Bicêtre, University Paris-Sud) with either confirmed or highly probable PVOD/PCH with DNA available for mutation screening (excluding patients with other risk factors of pulmonary hypertension, such as chronic respiratory diseases)...
January 10, 2017: Lancet Respiratory Medicine
https://www.readbyqxmd.com/read/28079843/the-association-between-bnp-6mwd-test-dlco-and-pulmonary-hypertension-in-sarcoidosis
#20
Mehdi Mirsaeidi, Hesham R Omar, Robert Baughman, Roberto Machado, Nadera Sweiss
INTRODUCTION: Pulmonary hypertension (PH) is a feared complication in patients with sarcoidosis.It is an important negative prognostic factor which is reflected as a priority given to these subjects for orthotopic lung transplantation. We evaluated the relationship between BNP, 6MWD test, DLCO% values and the severity of sarcoidosis-associated pulmonary hypertension. METHODS: A retrospective chart review was conducted between January 2010 and January 2015 on consecutive confirmed adult subjects diagnosed with sarcoidosis...
December 23, 2016: Sarcoidosis, Vasculitis, and Diffuse Lung Diseases: Official Journal of WASOG
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