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Pulmonary vascular resistance

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https://www.readbyqxmd.com/read/28207639/predictors-of-waitlist-mortality-in-portopulmonary-hypertension
#1
Hilary M DuBrock, David S Goldberg, Norman L Sussman, Sonja D Bartolome, Zakiyah Kadry, Reena J Salgia, David C Mulligan, Walter K Kremers, Steven M Kawut, Michael J Krowka, Richard N Channick
BACKGROUND: The current Organ Procurement Transplantation Network (OPTN) policy grants Model for End Stage Liver Disease (MELD) exception points to patients with portopulmonary hypertension (POPH), but potentially important factors, such as severity of liver disease and pulmonary hypertension, are not included in the exception score, and may affect survival. The purpose of this study was to identify significant predictors of waitlist mortality in patients with POPH. METHODS: We performed a retrospective cohort study of patients in the OPTN database with hemodynamics consistent with POPH [defined as mean pulmonary arterial pressure (mPAP) >25mmHg and pulmonary vascular resistance (PVR) ≥240 dynes-s-cm] who were approved for a POPH MELD exception between 2006 and 2014...
February 15, 2017: Transplantation
https://www.readbyqxmd.com/read/28199339/presence-of-%C3%A2-isolated%C3%A2-tricuspid-regurgitation-should-prompt-the-suspicion-of-heart-failure-with-preserved-ejection-fraction
#2
Julia Mascherbauer, Andreas A Kammerlander, Caroline Zotter-Tufaro, Stefan Aschauer, Franz Duca, Daniel Dalos, Susanne Winkler, Matthias Schneider, Jutta Bergler-Klein, Diana Bonderman
BACKGROUND: Diastolic dysfunction of the left ventricle is common but frequently under-diagnosed. Particularly in advanced stages affected patients may present with significant functional tricuspid regurgitation (TR) as the most prominent sign on echocardiography. The underlying left ventricular pathology may eventually be missed and symptoms of heart failure are attributed to TR, with respective therapeutic consequences. The aim of the present study was to determine prevalence and mechanisms underlying TR evolution in heart failure with preserved ejection fraction (HFpEF)...
2017: PloS One
https://www.readbyqxmd.com/read/28190787/comparison-of-hemodynamic-parameters-in-treatment-na%C3%A3-ve-and-pre-treated-patients-with-pulmonary-arterial-hypertension-in-the-randomized-phase-iii-patent-1-study
#3
Nazzareno Galiè, Friedrich Grimminger, Ekkehard Grünig, Marius M Hoeper, Marc Humbert, Zhi-Cheng Jing, Anne M Keogh, David Langleben, Lewis J Rubin, Arno Fritsch, Neil Davie, Hossein-Ardeschir Ghofrani
BACKGROUND: Detailed hemodynamic data from the phase III PATENT-1 study of riociguat in patients with pulmonary arterial hypertension (PAH) were investigated. METHODS: Patients with PAH who were treatment naïve or pre-treated with endothelin receptor antagonists or non-intravenous prostanoids were randomly assigned to riociguat up to 2.5 mg 3 times a day or placebo. Hemodynamic parameters were assessed at baseline and week 12. RESULTS: Riociguat significantly decreased pulmonary vascular resistance in treatment-naïve (n = 221; least squares [LS] mean difference -266 dyne∙sec∙cm(-5) [95% confidence interval (CI) -357 to -175; p < 0...
December 24, 2016: Journal of Heart and Lung Transplantation
https://www.readbyqxmd.com/read/28187784/let-7a-transfected-mesenchymal-stem-cells-ameliorate-monocrotaline-induced-pulmonary-hypertension-by-suppressing-pulmonary-artery-smooth-muscle-cell-growth-through-stat3-bmpr2-signaling
#4
Gesheng Cheng, Xingye Wang, Yongxin Li, Lu He
BACKGROUND: Cell-based gene therapy has become a subject of interest for the treatment of pulmonary arterial hypertension (PAH), a devastating disease characterized by pulmonary artery smooth muscle cell (PASMC) hyperplasia. Mesenchymal stem cells (MSCs) have been recently acknowledged as a potential cell vector for gene therapy. Here, we investigated the effect of MSC-based let-7a for PAH. METHODS: After isolation and identification of MSCs from rat bone marrow, cells were infected with recombinant adenovirus vector Ad-let-7a...
February 10, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28187374/the-strengths-and-weaknesses-of-non-invasive-parameters-obtained-by-echocardiography-and-cardiopulmonary-exercise-testing-in-comparison-with-the-hemodynamic-assessment-by-the-right-heart-catheterization-in-patients-with-pulmonary-hypertension
#5
Katarzyna Ptaszyńska-Kopczyńska, Anna Krentowska, Emilia Sawicka, Anna Skoneczny, Małgorzata Jasiewicz, Małgorzata Knapp, Włodzimierz J Musiał, Bożena Sobkowicz, Karol A Kamiński
PURPOSE: Pulmonary hypertension (PH) diagnosis requires invasive assessment by right heart catheterization (RHC), but screening and monitoring are performed using non-invasive methods: echocardiography and cardiopulmonary exercise testing (CPET). The aim of the study was to assess correlations between the parameters obtained in non-invasive testing and RHC in patients with PH of different etiologies. MATERIAL/METHODS: The study included 53 medical records of PH patients (32 women) aged 29-81 years...
June 14, 2016: Advances in Medical Sciences
https://www.readbyqxmd.com/read/28181133/effects-of-aerobic-exercise-training-on-metabolism-of-nitric-oxide-and-endothelin-1-in-lung-parenchyma-of-rats-with-pulmonary-arterial-hypertension
#6
A Zimmer, R B Teixeira, J H P Bonetto, R Siqueira, C C Carraro, L M Donatti, A Hickmann, I E Litvin, A E G Godoy, A S Araujo, R Colombo, Adriane Belló-Klein
Pulmonary arterial hypertension (PAH) is characterized by vasoconstriction and proliferative obstruction of pulmonary vessels, which promotes a progressive increase in pulmonary vascular resistance (PVR). The effect of exercise training on oxidative stress, metabolism, and markers of nitric oxide (NO) and endothelin-1 (ET-1) was analyzed in the lung tissue of rats with PAH induced by monocrotaline (MCT).Twenty-four Wistar rats were divided into four groups (5-7 animals): sedentary control (SC), sedentary MCT (SM), trained control (TC), and trained MCT (TM)...
February 8, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28178968/imatinib-relaxes-the-pulmonary-venous-bed-of-guinea-pigs
#7
Nina A Maihöfer, Said Suleiman, Daniela Dreymüller, Paul W Manley, Rolf Rossaint, Stefan Uhlig, Christian Martin, Annette D Rieg
BACKGROUND: Recently, the IMPRES study revealed that systemic imatinib improves exercise capacity in patients with advanced pulmonary arterial hypertension. Imatinib blocks the tyrosine kinase activity of the platelet-derived growth factor (PDGF)-receptor (PDGFR), acts antiproliferative and relaxes pulmonary arteries. However so far, the relaxant effects of imatinib on pulmonary veins (PVs) and on the postcapillary resistance are unknown, although pulmonary hypertension (PH) due to left heart disease (LHD) is most common and primarily affects PVs...
February 8, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28168563/right-atrial-strain-is-predictive-of-clinical-outcomes-and-invasive-hemodynamic-data-in-group-1-pulmonary-arterial-hypertension
#8
Nicole M Bhave, Scott H Visovatti, Brian Kulick, Theodore J Kolias, Vallerie V McLaughlin
Transthoracic echocardiography (TTE) is a practical and widely used tool for risk stratification in pulmonary arterial hypertension (PAH). We hypothesized that right atrial (RA) reservoir function, represented by peak RA systolic strain, correlates with invasive hemodynamic measurements and clinical outcomes in PAH. Patients with group 1 PAH who had TTE within 6 months of index PAH clinic visit and right heart catheterization were included in this retrospective study. Peak RA strain in the 2D apical 4-chamber view was measured with speckle-tracking software...
February 6, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28166761/hemosiderin-laden-macrophages-are-an-independent-factor-correlated-with-pulmonary-vascular-resistance-in-idiopathic-pulmonary-fibrosis-a-case-control-study
#9
Jun Fukihara, Hiroyuki Taniguchi, Masahiko Ando, Yasuhiro Kondoh, Tomoki Kimura, Kensuke Kataoka, Taiki Furukawa, Takeshi Johkoh, Junya Fukuoka, Koji Sakamoto, Yoshinori Hasegawa
BACKGROUND: Increases in hemosiderin-laden macrophages (HLM) are reported to be observed in idiopathic pulmonary fibrosis (IPF). According to a recent study, significant correlation between hemosiderin deposition in the lung tissue of IPF and pulmonary hypertension evaluated by echocardiography has been suspected. In this study, we aimed to evaluate whether HLM in bronchoalveolar lavage fluid (BALF) is a factor correlated with pulmonary hemodynamic parameters evaluated by right heart catheterization in patients with IPF...
February 6, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/28160954/management-of-sepsis-in-patients-with-pulmonary-arterial-hypertension-in-the-intensive-care-unit
#10
REVIEW
Todd M Tartavoulle
Pulmonary arterial hypertension is a lethal condition, and the management of sepsis in patients with pulmonary arterial hypertension is challenging. As the disease progresses, the right ventricle is susceptible to failure due to a high pulmonary vascular resistance. The limited ability of the right ventricle to increase cardiac output in septic shock makes it difficult to deliver oxygen to the organ and tissues. Intravascular volume replacement and vasoactive drugs should only be considered after a thorough assessment...
March 2017: Critical Care Nursing Clinics of North America
https://www.readbyqxmd.com/read/28159512/effect-of-calcium-channel-blockers-evaluated-by-cardiopulmonary-exercise-testing-in-idiopathic-pulmonary-arterial-hypertension-responding-to-acute-pulmonary-vasoreactivity-testing
#11
Yi Tang, Lei Yao, Zhihong Liu, Xiuping Ma, Qin Luo, Zhihui Zhao, Zhiwei Huang, Laura Tu, Liu Gao, Qi Jin, Xinhai Ni, Changming Xiong
BACKGROUND: The baseline exercise capacity evaluated by cardiopulmonary exercise testing (CPET) and the change after administration of calcium channel blockers (CCB) therapy in patients with vasodilator-responsive idiopathic pulmonary arterial hypertension (VR-IPAH)are unknown. METHODS: 25 patients with newly diagnosed VR-IPAH from 1 January 2012 to 16 November 2015 were prospectively enrolled, and 28 age, sex and pulmonary vascular resistance matched newly diagnosed patients with vasodilator-nonresponsive idiopathic pulmonary arterial hypertension (VNR-IPAH) were enrolled...
January 31, 2017: Pulmonary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28155615/the-protective-effect-of-dl0805-derivatives-on-pulmonary-artery-cells-and-the-underlying-mechanisms-study
#12
Tianyi Yuan, Huifang Zhang, Yucai Chen, Xiaozhen Jiao, Ping Xie, Lianhua Fang, Guanhua Du
Pulmonary hypertension (PH) is a severe disease characterized by a progressive increase in pulmonary vascular resistance, initially due to abnormal pulmonary vasoconstriction in response to endothelial and smooth muscle cells injury. The discovery of new chemical entities having a protective effect on pulmonary artery cells could be meaningful for the treatment of PH. We evaluated the protective effect of DL0805 derivatives (DL0805-1 and DL0805-2) on pulmonary artery vascular cells, including human pulmonary artery endothelial cells (HPAECs) and human pulmonary artery smooth muscle cells (HPASMCs)...
February 1, 2017: Current Vascular Pharmacology
https://www.readbyqxmd.com/read/28154291/improvement-in-quality-of-life-and-hemodynamics-in-chronic-thromboembolic-pulmonary-hypertension-treated-with-balloon-pulmonary-angioplasty
#13
Szymon Darocha, Radosław Pietura, Arkadiusz Pietrasik, Justyna Norwa, Anna Dobosiewicz, Michał Piłka, Michał Florczyk, Andrzej Biederman, Adam Torbicki, Marcin Kurzyna
BACKGROUND: The effect of balloon pulmonary angioplasty (BPA) on improvement in functional and hemodynamic parameters in chronic thromboembolic pulmonary hypertension (CTEPH) is known, but the quality of life (QoL) of patients treated with BPA has never been studied before.Methods and Results:Twenty-five patients with inoperable or persistent CTEPH were enrolled in the study and filled out the 36-item Short Form (SF-36v2) questionnaire twice: prior to commencement of BPA treatment and after ≥3 BPA sessions...
February 1, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28145907/evaluation-of-reperfusion-pulmonary-edema-by-extravascular-lung-water-measurements-after-pulmonary-endarterectomy
#14
François Stéphan, Aurélien Mazeraud, Florent Laverdure, Julien Camous, Elie Fadel
OBJECTIVES: Reperfusion pulmonary edema is a specific complication of pulmonary endarterectomy for chronic thromboembolic pulmonary hypertension. Extravascular lung water measurement may be valuable for diagnosing reperfusion pulmonary edema. The primary objective of this study was to describe and assess the clinical significance of extravascular lung water variations after pulmonary endarterectomy. DESIGN: Prospective observational study. SETTING: Nineteen-bed cardiothoracic ICU...
January 31, 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28131663/pulmonary-hypertension-and-ventilation-during-exercise-role-of-the-pre-capillary-component
#15
Sergio Caravita, Andrea Faini, Gael Deboeck, Antoine Bondue, Robert Naeije, Gianfranco Parati, Jean-Luc Vachiéry
BACKGROUND: Excessive exercise-induced hyperventilation and high prevalence of exercise oscillatory breathing (EOB) are present in patients with post-capillary pulmonary hypertension (PH) complicating left heart disease (LHD). Patients with pre-capillary PH have even higher hyperventilation but no EOB. We sought to determine the impact of a pre-capillary component of PH on ventilatory response to exercise in patients with PH and left heart disease. METHODS: We retrospectively compared patients with idiopathic or heritable pulmonary arterial hypertension (PAH, n = 29), isolated post-capillary PH (IpcPH, n = 29), and combined post- and pre-capillary PH (CpcPH, n = 12)...
December 23, 2016: Journal of Heart and Lung Transplantation
https://www.readbyqxmd.com/read/28130258/hypoxia-inhibits-expression-and-function-of-mitochondrial-thioredoxin-2-to-promote-pulmonary-hypertension
#16
Sherry E Adesina, Brandy E Wade, Kaiser M Bijli, Bum-Yong Kang, Clintoria R Williams, Jing Ma, Young-Mi Go, C Michael Hart, Roy L Sutliff
Pulmonary hypertension (PH) is characterized by increased pulmonary vascular resistance, pulmonary vascular remodeling, and increased pulmonary vascular pressures that often result in right ventricular dysfunction, leading to right heart failure. Evidence suggests that reactive oxygen species (ROS) contribute to PH pathogenesis by altering pulmonary vascular cell proliferation and intracellular signaling pathways. However, the role of mitochondrial antioxidants and oxidant-derived stress signaling in the development of hypoxia-induced PH is largely unknown...
January 27, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28123500/effects-of-low-dose-tolvaptan-on-electrolyte-abnormality-and-hemodynamic-parameters-in-a-liver-cirrhosis-associated-portopulmonary-hypertension-patient-a-case-report
#17
Yoshito Ogihara, Norikazu Yamada, Kaoru Dohi, Akimasa Matsuda, Satoshi Ota, Ken Ishikura, Mashio Nakamura, Masaaki Ito
The present study reported a case of portopulmonary hypertension (POPH) that was secondary to underlying liver cirrhosis in a 58-year-old woman, who was successfully treated with low-dose tolvaptan. The patient had suffered from refractory peripheral edema and electrolyte abnormalities, including severe hypokalemia, under the combination therapy of sildenafil, ambrisentan, furosemide and spironolactone. Subsequent to the initiation of low-dose tolvaptan at 3.75 mg/day with concurrent de-escalation of the dose of furosemide, the daily urine volume increased, peripheral edema improved and the serum potassium level increased immediately...
January 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28117181/prognostic-stratification-in-pulmonary-hypertension-a-multi-biomarker-approach
#18
Rui Plácido, Nuno Cortez-Dias, Susana Robalo Martins, Ana Gomes Almeida, Carina Calisto, Susana Gonçalves, Malha Sadoune, António Nunes Diogo, Alexandre Mebazaa, Fausto José Pinto
INTRODUCTION: Pulmonary hypertension (PH) covers a group of conditions characterized by an increase in pulmonary vascular resistance leading to right ventricular failure. Risk stratification is crucial for adequate prognostic and therapeutic assessment. However, the accuracy of conventional parameters is limited, especially biomarkers. OBJECTIVES: To determine the prognostic value of new biomarkers and their combination in a multi-biomarker approach to predict outcome in patients with PH...
February 2017: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/28107308/acute-right-heart-failure-after-hemorrhagic-shock-and-trauma-pneumonectomy-a-management-approach-a-blinded-randomized-controlled-animal-trial-using-inhaled-nitric-oxide
#19
Andrea L Lubitz, Lars O Sjoholm, Amy Goldberg, Abhijit Pathak, Thomas Santora, Thomas E Sharp, Markus Wallner, Remus M Berretta, Lauren A Poole, Jichuan Wu, Marla R Wolfson
BACKGROUND: Hemorrhagic shock and pneumonectomy causes an acute increase in pulmonary vascular resistance (PVR). The increase in PVR and right ventricular (RV) afterload leads to acute RV failure, thus reducing left ventricular (LV) preload and output. Inhaled nitric oxide (iNO) lowers PVR by relaxing pulmonary arterial smooth muscle without remarkable systemic vascular effects. We hypothesized that with hemorrhagic shock and pneumonectomy, iNO can be used to decrease PVR and mitigate right heart failure...
2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28104572/progressive-heart-disease-in-mucopolysaccharidosis-type-i-mice-may-be-mediated-by-increased-cathepsin-b-activity
#20
Guilherme Baldo, Angela Maria Vicente Tavares, Esteban Gonzalez, Edina Poletto, Fabiana Quoos Mayer, Ursula da Silveira Matte, Roberto Giugliani
Mucopolysaccharidosis type I (MPS I) is a lysosomal disorder characterized by a deficiency of alpha-L-iduronidase and storage of undegraded glycosaminoglycans (GAGs). Clinical findings of the disease include heart failure, and patients often need valve replacement. It has been shown that, later in life, MPS I mice develop those abnormalities, but to date, there have not been studies on the progression and pathogenesis of the disease. Therefore, in the present study, we evaluated heart function in normal and MPS I male mice from 2 to 8 months of age...
January 6, 2017: Cardiovascular Pathology: the Official Journal of the Society for Cardiovascular Pathology
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