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https://www.readbyqxmd.com/read/29351457/important-role-of-endothelium-dependent-hyperpolarization-in-pulmonary-microcirculation-in-male-mice-implications-for-hypoxia-induced-pulmonary-hypertension
#1
Shuhei Tanaka, Takashi Shiroto, Shigeo Godo, Hiroki Saito, Yosuke Ikumi, Akiyo Ito, Shoko Kajitani, Saori Sato, Hiroaki Shimokawa
Endothelium-dependent hyperpolarization (EDH) plays important roles in systemic circulation, whereas its role in pulmonary circulation remains largely unknown. Furthermore, the underlying mechanisms of pulmonary hypertension (PH) also remain to be elucidated. We thus aimed to elucidate the role of EDH in pulmonary circulation in general and in PH in particular. In isolated perfused lung using male wild-type mice, endothelium-dependent relaxations to bradykinin (BK) were significantly reduced in the presence of Nω-nitro-L-arginine (L-NNA) by ~50% as compared with those in the presence of indomethacin, and the combination of apamin plus charybdotoxin abolished the residual relaxations, showing the comparable contributions of nitric oxide (NO) and EDH in pulmonary microcirculation under physiological conditions...
January 5, 2018: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29349730/ccn5-in-alveolar-epithelial-proliferation-and-differentiation-during-neonatal-lung-oxygen-injury
#2
Najla Fiaturi, Joshua W Russo, Heber C Nielsen, John J Castellot
Lung immaturity is the major cause of morbidity and mortality in premature infants, especially those born <28 weeks of gestation. These infants are at high risk of developing respiratory distress syndrome (RDS), a lung disease caused by insufficient surfactant production and immaturity of saccular/alveolar type II epithelial cells in the lung. RDS treatment includes oxygen and respiratory support that improve survival but also increase the risk for bronchopulmonary dysplasia (BPD), a chronic lung disease characterized by arrested alveolarization, airway hyperreactivity, and pulmonary hypertension...
January 18, 2018: Journal of Cell Communication and Signaling
https://www.readbyqxmd.com/read/29345199/pulmonary-vascular-dysfunction-secondary-to-pulmonary-arterial-hypertension-insights-gained-through-retrograde-perfusion
#3
Chun Zhou, Edward S Crockett, Lynn Batten, Ivan F McMurtry, Troy Stevens
Here, we tested the hypothesis that severe pulmonary arterial hypertension impairs retrograde perfusion. To test this hypothesis, pulmonary arterial hypertension was induced in Fischer rats using a single injection of Sugen 5416 followed by 3 weeks of exposure to 10% hypoxia and then 2 weeks of normoxia. This Sugen 5416 and hypoxia regimen caused severe pulmonary arterial hypertension, with a Fulton Index of 0.73+0.07, reductions in both the pulmonary arterial acceleration time and pulmonary arterial acceleration to pulmonary arterial ejection times ratio, and extensive medial hypertrophy and occlusive neointimal lesions...
January 18, 2018: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/29345197/neonatal-hyperoxia-depletes-pulmonary-vein-cardiomyocytes-in-adult-mice-via-mitochondrial-oxidation
#4
Min Yee, Ethan David Cohen, William Domm, George A Porter, Andrew N McDavid, Michael A O'Reilly
Supplemental oxygen given to preterm infants has been associated with permanently altering postnatal lung development. Now that these individuals are reaching adulthood, there is growing concern that early-life oxygen exposure may also promote cardiovascular disease through poorly understood mechanisms. We previously reported that adult mice exposed to 100% oxygen between postnatal days 0-4 develop pulmonary hypertension defined pathologically by capillary rarefaction, dilation of arterioles and veins, cardiac failure, and a reduced lifespan...
January 18, 2018: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/29345193/serotonin-2a-receptor-inhibition-protects-against-the-development-of-pulmonary-hypertension-and-pulmonary-vascular-remodeling-in-neonatal-mice
#5
Cassidy Delaney, Laurie Sherlock, Susan Fisher, Joanne K Maltzahn, Clyde J Wright, Eva Nozik-Grayck
Pulmonary hypertension (PH) complicating bronchopulmonary dysplasia (BPD) worsens clinical outcomes in former preterm infants. Increased serotonin (5-hydroxytryptamine, 5-HT) signaling plays a prominent role in PH pathogenesis and progression in adults. We hypothesized that increased 5-HT signaling contributes to the pathogenesis of neonatal PH complicating BPD and neonatal lung injury. Thus, we interrogated 5-HT signaling in neonatal mice exposed to bleomycin, previously demonstrated to induce PH and alveolar simplification...
January 18, 2018: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/29342993/-analysis-of-prognosis-and-associated-risk-factors-in-pediatric-idiopathic-pulmonary-arterial-hypertension
#6
Q Liu, C Zhang, Q Q Li, Y Zhu, D Zhang, W G Zhao, H Gu
Objective: To analyze the prognosis and associated risk factors of pediatric idiopathic pulmonary arterial hypertension. Methods: A total of 119 patients under 18 years of age diagnosed as idiopathic pulmonary arterial hypertension in the Pulmonary Arterial Hypertension Center in Beijing Anzhen Hospital between June 2007 and May 2017 were enrolled in this retrospective study. The clinical informations and follow-up data were collected. The endpoints of follow-up were defined as death or undergoing lung transplantation...
January 2, 2018: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
https://www.readbyqxmd.com/read/29336713/persistent-pulmonary-hypertension-without-underlying-cardiac-disease-as-a-presentation-of-pulmonary-interstitial-glycogenosis
#7
Gordon Gray Still, Shuo Li, Mark Wilson, Paul Sammut
INTRODUCTION: Pulmonary interstitial glycogenosis (PIG) is an idiopathic lung condition that remains clinically underrecognized despite a growing body of literature. CASE REPORT: We present a case of PIG with pulmonary hypertension without underlying cardiac disease. This patient presented with respiratory distress and spontaneous pneumothorax at 6 months of age. Laboratory and imaging investigations demonstrated nonspecific features, but refractory pulmonary hypertension was confirmed on cardiac catheterization...
January 16, 2018: Fetal and Pediatric Pathology
https://www.readbyqxmd.com/read/29332925/pulmonary-artery-pseudoaneurysm-secondary-to-lung-inf-lammation
#8
Shinichirou Ishimoto, Hiroyuki Sakurai, Ryouta Higure, Riken Kawachi, Mie Shimamura
Pulmonary artery aneurysms (PAA) and pseudoaneurysms (PAP) are caused by infections, vasculitis, trauma, pulmonary hypertension, congenital heart disease, and connective tissue disease. Most cases of such aneurysm occur in the trunk or major branches of the pulmonary artery, while the peripheral type is less common. The treatment modalities are medical therapy, surgery, and percutaneous catheter embolization. The mortality rate associated with rupture is approximately 50%. We encountered a case of a 53-year-old man with a pulmonary artery pseudoaneurysm secondary to pneumonia and cavity formation during chemotherapy for acute myeloid leukemia (AML)...
January 15, 2018: Annals of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29332912/impairment-of-iodine-123-metaiodobenzylguanidine-123i-mibg-uptake-in-patients-with-pulmonary-artery-hypertension
#9
Kenjuro Higo, Kayoko Kubota, Sunao Miyanaga, Masaaki Miyata, Masatoyo Nakajo, Megumi Jinguji, Mitsuru Ohishi
According to recent studies, lung uptake of iodine-123-metaiodobenzylguanidine (123I-MIBG) is impaired in many lung diseases and low lung uptake of 123I-MIBG suggests endothelial dysfunction of the pulmonary artery. 123I-MIBG scintigraphy in patients with pulmonary hypertension (PH) has not yet been clinically evaluated. We hypothesized that the lung uptake of 123I-MIBG is reduced in patients with PH and differs among PH subtypes. The purpose of the present study was to analyze the lung uptake of 123I-MIBG in patients with PH and compare it with the data obtained by echocardiography or right heart catheterization...
January 15, 2018: International Heart Journal
https://www.readbyqxmd.com/read/29332910/successful-infant-pneumonectomy-with-unilateral-pulmonary-artery-occlusion-test
#10
Koji Kato, Taichi Kato, Satoshi Hayano, Yoshie Fukasawa, Atsushi Numaguchi, Tetsuo Hattori, Akiko Saito, Yoshiaki Sato, Masahiro Hayakawa
The use of unilateral pulmonary artery occlusion (UPAO) test for the preoperative evaluation of pneumonectomy was reported in adult patients. On the contrary, in infants, no strategies have yet been recommended to predict hemodynamics after pneumonectomy, nor has use of the UPAO test been reported. We describe the first case of infant with abnormal pulmonary circulation in whom successful pneumonectomy was performed after preoperative evaluation using UPAO test. Right pneumonectomy was planned for an 8-month-old girl, because of decreased right pulmonary function, high risk of pneumothorax, and impaired left lung expansion due to overexpansion caused by severe left bronchial stenosis and bronchomalacia...
January 15, 2018: International Heart Journal
https://www.readbyqxmd.com/read/29332673/prevalence-and-comorbidity-of-sleep-conditions-in-australian-adults-2016-sleep-health-foundation-national-survey
#11
Sarah L Appleton, Tiffany K Gill, Carol J Lang, Anne W Taylor, R Douglas McEvoy, Nigel P Stocks, David A González-Chica, Robert J Adams
OBJECTIVE: To determine the prevalence of sleep conditions (obstructive sleep apnea [OSA], insomnia symptoms, simple snoring, and restless legs) and their associated burden of chronic conditions in a community sample. DESIGN: Cross-sectional national adult online survey. SETTING: Community-based sample. PARTICIPANTS: Australian adults ≥18 years, N = 1011. MEASUREMENTS: A cross-sectional national online survey assessed diagnosed OSA, OSA symptoms, insomnia symptoms, sleep problems, excessive daytime sleepiness (Epworth Sleepiness Scale ≥11), and physician-diagnosed health conditions (heart disease, diabetes, hypertension, reflux disease, lung disease, depression, anxiety/panic disorder, arthritis)...
February 2018: Sleep Health
https://www.readbyqxmd.com/read/29329993/pulmonary-arterial-hypertension-in-four-patients-treated-by-leflunomide
#12
Valentin Coirier, Alain Lescoat, Céline Chabanne, Maxime Fournet, Guillaume Coiffier, Stéphane Jouneau, Elisabeth Polard, Patrick Jégo
Pulmonary arterial hypertension (PAH) is a rare disorder that can be drug-induced, mostly following treatment by appetite-suppressant drugs. We report four cases of patients who developed PAH following a treatment by leflunomide for rheumatoid arthritis, psoriatic arthritis or undetermined connective tissue disease. All patients described a progressive dyspnea from grade II to IV of NYHA classification; clinical examination found signs of heart failure. PAH was finally diagnosed and confirmed by right heart catheterisation...
January 9, 2018: Joint, Bone, Spine: Revue du Rhumatisme
https://www.readbyqxmd.com/read/29327393/pulmonary-hypertension-in-interstitial-lung-disease-limitations-of-echocardiography-compared-to-cardiac-catheterization
#13
Gregory J Keir, S John Wort, Maria Kokosi, Peter M George, Simon L F Walsh, Joseph Jacob, Laura Price, Simon Bax, Elisabetta A Renzoni, Toby M Maher, Peter MacDonald, David M Hansell, Athol U Wells
BACKGROUND AND OBJECTIVE: In interstitial lung disease (ILD), pulmonary hypertension (PH) is a major adverse prognostic determinant. Transthoracic echocardiography (TTE) is the most widely used tool when screening for PH, although discordance between TTE and right heart catheter (RHC) measured pulmonary haemodynamics is increasingly recognized. We evaluated the predictive utility of the updated European Society of Cardiology/European Respiratory Society (ESC/ERS) TTE screening recommendations against RHC testing in a large, well-characterized ILD cohort...
January 12, 2018: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/29325918/bioactive-fraction-of-rhodiola-algida-against-chronic-hypoxia-induced-pulmonary-arterial-hypertension-and-its-anti-proliferation-mechanism-in-rats
#14
Xingmei Nan, Shanshan Su, Ke Ma, Xiaodong Ma, Ximeng Wang, Dongzhu Zhaxi, Rili Ge, Zhanqiang Li, Dianxiang Lu
BACKGROUND: Rhodiola algida has long been used to prevent acute and chronic altitude sickness. In our previous study, we screened for a bioactive fraction from R. algida. However, the effects and mechanisms of this bioactive fraction on chronic hypoxia-induced pulmonary arterial hypertension remain to be elucidated. OBJECTIVE: The aim of this study was to determine the effect of bioactive fraction from R. algida (ACRT) on chronic hypoxia-induced pulmonary arterial hypertension (HPAH) and to understand the possible mechanism of its pharmacodynamic actions...
January 8, 2018: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29325684/respiratory-comorbidities-and-risk-of-mortality-in-hospitalized-patients-with-idiopathic-pulmonary-fibrosis
#15
Keishi Oda, Kazuhiro Yatera, Yoshihisa Fujino, Takashi Kido, Tetsuya Hanaka, Konomi Sennari, Kiyohide Fushimi, Shinya Matsuda, Hiroshi Mukae
BACKGROUND: Respiratory comorbidities are frequently associated with idiopathic pulmonary fibrosis (IPF). However, little is known about their prognostic impact in hospitalized patients with IPF. We examined the impact of respiratory comorbidities on the mortality rates of hospitalized patients with IPF using a Japanese nationwide database. METHODS: We identified 5665 hospitalized patients diagnosed with IPF between April 2010 and March 2013. The primary outcome was defined as the in-hospital mortality at 30 days after admission...
January 2018: Respiratory Investigation
https://www.readbyqxmd.com/read/29322341/interstitial-lung-disease-in-systemic-sclerosis-data-from-the-spanish-scleroderma-study-group
#16
D Sánchez-Cano, N Ortego-Centeno, J L Callejas, V Fonollosa Plá, R Ríos-Fernández, C Tolosa-Vilella, G Espinosa-Garriga, D Colunga-Argüelles, M V Egurbide-Arberas, M Rubio-Rivas, M Freire, J J Ríos-Blanco, L Trapiella-Martínez, M Rodríguez-Carballeira, A Marín-Ballvé, X Pla-Salas, C P Simeón-Aznar
OBJECTIVES: To evaluate the clinical characteristics of patients with interstitial lung disease (ILD) in the setting of a large cohort of systemic sclerosis (SSc) patients, and to analyse the differences according to the SSc subtype (following the modification of classification criteria of the American College of Rheumatology for SSc proposed by LeRoy and Medsger), factors are associated with moderate-to-severe impairment of lung function, as well as mortality and causes of death. METHODS: A descriptive study was performed, using the available data from the Spanish Scleroderma Study Group...
January 10, 2018: Rheumatology International
https://www.readbyqxmd.com/read/29319036/the-use-of-adaptive-intensity-modulated-radiotherapy-in-the-treatment-of-small-cell-carcinoma-lung-refractory-to-chemotherapy-in-a-patient-with-preexisting-interstitial-lung-disease
#17
Sarthak Tandon, Munish Gairola, Manoj Pal, Archana Aggarwal, Kanika Sharma, Ahmad Masroor Karimi, Avik Mandal, Rajiv Goyal, Ullas Batra, Inderjit Kaur
This is a case report of a 60-year-old diabetic, hypertensive male with a good performance status and a history of bilateral interstitial lung disease with a left upper lobe lung mass diagnosed to be a Stage IIB mixed small-cell/squamous cell carcinoma which was refractory to carboplatin- and etoposide-based chemotherapy. The patient was then taken up for adaptive intensity-modulated radiotherapy with tighter margin under image guidance with a mid-treatment replanning done at 25#. Acute toxicities were assessed weekly and showed no Grade 3 or more reactions...
January 2018: Lung India: Official Organ of Indian Chest Society
https://www.readbyqxmd.com/read/29318995/sinistral-portal-hypertension-due-to-pancreatic-hydatid-cyst
#18
Tolga Canbak, Aylin Acar, Ali Ediz Kıvanç, Fatih Başak, Fatma Kulalı, Gürhan Baş
Hydatid disease is caused by Echinococcus granulosus. Hydatid cysts are commonly located in the liver and lungs. The occurrence of pancreatic hydatid cysts is very rare, even in endemic areas. Sinistral portal hypertension, which is rarely seen, occurs when a pathological process causes splenic vein occlusion. A 26-year-old male patient presented with abdominal pain. He had a history of operation for hydatid cyst of the lung 15 years ago. A left thoracotomy incision scar was observed during his physical examination...
December 2017: Türkiye Parazitolojii Dergisi
https://www.readbyqxmd.com/read/29317191/randomized-double-blind-phase-ib-iii-study-of-erlotinib-with-ramucirumab-or-placebo-in-previously-untreated-egfr-mutant-metastatic-non-small-cell-lung-cancer-relay-phase-ib-results
#19
Martin Reck, Edward B Garon, Luis Paz-Ares, Santiago Ponce, Jesus Corral Jaime, Oscar Juan, Ernest Nadal, Katsuyuki Kiura, Ryan C Widau, Shuang He, Rita Dalal, Pablo Lee, Kazuhiko Nakagawa
BACKGROUND: Despite the likelihood of an initial response to an epidermal growth factor receptor (EGFR) tyrosine kinase inhibitor (TKI), EGFR-mutant non-small-cell lung cancer (NSCLC) patients develop disease progression. Antiangiogenic agents in combination with an EGFR TKI might provide additional benefit in patients with EGFR-mutant NSCLC. In this article we report safety, exposure, and progression-free survival (PFS) results for part A (phase Ib) of RELAY, a randomized, double-blind, phase Ib/III study investigating safety and efficacy of erlotinib (EGFR TKI) with ramucirumab (anti-vascular endothelial growth factor receptor-2 antibody) or placebo in first-line EGFR-mutant stage IV NSCLC...
November 21, 2017: Clinical Lung Cancer
https://www.readbyqxmd.com/read/29316368/rash-fever-and-pulmonary-hypertension-in-a-6-year-old-female
#20
David Buchbinder, Gina A Montealegre Sanchez, Raphaela Goldbach-Mansky, Hermine Brunner, Andrew I Shulman
A previously healthy 2-year-old Guatemalan female with an undiagnosed chronic illness characterized by fever and rash had presented with anorexia, weight loss, periorbital edema, abdominal pain and distention. A chest radiograph documented cardiomegaly. An echocardiogram demonstrated a pericardial effusion, dilated right atrium, right ventricle, and main pulmonary artery as well as diminished right ventricular systolic function and pulmonary hypertension. Right ventricular systolic pressure was estimated at 90 mmHg...
January 5, 2018: Arthritis Care & Research
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