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Pulmonary circulation

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https://www.readbyqxmd.com/read/29786774/computational-fluid-dynamics-modeling-of-the-human-pulmonary-arteries-with-experimental-validation
#1
Alifer D Bordones, Matthew Leroux, Vitaly O Kheyfets, Yu-An Wu, Chia-Yuan Chen, Ender A Finol
Pulmonary hypertension (PH) is a chronic progressive disease characterized by elevated pulmonary arterial pressure, caused by an increase in pulmonary arterial impedance. Computational fluid dynamics (CFD) can be used to identify metrics representative of the stage of PH disease. However, experimental validation of CFD models is often not pursued due to the geometric complexity of the model or uncertainties in the reproduction of the required flow conditions. The goal of this work is to validate experimentally a CFD model of a pulmonary artery phantom using a particle image velocimetry (PIV) technique...
May 21, 2018: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/29780628/comprehensive-targeted-super-deep-next-generation-sequencing-enhances-differential-diagnosis-of-solitary-pulmonary-nodules
#2
Mingzhi Ye, Shiyong Li, Weizhe Huang, Chunli Wang, Liping Liu, Jun Liu, Jilong Liu, Hui Pan, Qiuhua Deng, Hailing Tang, Long Jiang, Weizhe Huang, Xi Chen, Di Shao, Zhiyu Peng, Renhua Wu, Jing Zhong, Zhe Wang, Xiaoping Zhang, Karsten Kristiansen, Jian Wang, Ye Yin, Mao Mao, Jianxing He, Wenhua Liang
Background: A non-invasive method to predict the malignancy of surgery-candidate solitary pulmonary nodules (SPN) is urgently needed. Methods: Super-depth next generation sequencing (NGS) of 35 paired tissues and plasma DNA was performed as an attempt to develop an early diagnosis approach. Results: Only ~6% of malignant nodule patients had driver mutations in the circulating tumour DNA (ctDNA) with >10,000-fold sequencing depth, and the concordance of mutation between tDNA and ctDNA was 3...
April 2018: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29779927/patent-ductus-arteriosus-the-physiology-of-transition
#3
REVIEW
Poorva Deshpande, Michelle Baczynski, Patrick J McNamara, Amish Jain
The transition from intrauterine to extrauterine life represents a critical phase of physiological adaptation which impacts many organ systems, most notably the heart and the lungs. The majority of term neonates complete this transition without complications; however, dysregulation of normal postnatal adaptation may lead to acute cardiopulmonary instability, necessitating advanced intensive care support. Although not as well appreciated as changes in vascular resistances, the shunt across the DA plays a crucial physiologic role in the adaptive processes related to normal transitional circulation...
May 5, 2018: Seminars in Fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/29778312/biomarker-signatures-of-sickle-cell-disease-severity
#4
Mengtian Du, Sarah Van Ness, Victor Gordeuk, Sayed M Nouraie, Sergei Nekhai, Mark Gladwin, Martin H Steinberg, Paola Sebastiani
Identifying sickle cell disease patients at high risk of complications could lead to personalized treatment and better prognosis but despite many advances prediction of the clinical course of these patients remains elusive. We propose a system-type approach to discover profiles of multiple, common biomarkers that correlate with morbidity and mortality in sickle cell disease. We used cluster analysis to discover 17 signatures of 17 common circulating biomarkers in 2320 participants of the Cooperative Study of Sickle Cell Disease, and evaluated the association of these signatures with risk for stroke, pain, leg ulceration, acute chest syndrome, avascular necrosis, seizure, death, and trend of fetal hemoglobin and hemolysis using longitudinally collected data...
May 16, 2018: Blood Cells, Molecules & Diseases
https://www.readbyqxmd.com/read/29767367/a-review-of-transcriptome-analysis-in-pulmonary-vascular-diseases
#5
Dustin R Fraidenburg, Roberto F Machado
Transcriptome analysis is a powerful tool in the study of pulmonary vascular disease and pulmonary hypertension. Pulmonary hypertension is a disease process that consists of several unique pathologies sharing a common clinical definition, that of elevated pressure within the pulmonary circulation. As such, it has become increasingly important to identify both similarities and differences among the different classes of pulmonary hypertension. Transcriptome analysis has been an invaluable tool both in the basic science research on animal models as well as clinical research among the various different groups of pulmonary hypertension...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29764553/-interposed-abdominal-pulling-pressing-cardiopulmonary-resuscitation-improve-the-resuscitation-effect-for-patients-with-cardiac-arrest
#6
Dabing Wang, Xiaonan Feng, Yujuan Han
OBJECTIVE: To study the impact of interposed abdominal pulling-pressing cardiopulmonary resuscitation (IAPP-CPR) for patients with cardiac arrest (CA). METHODS: A prospective study was conducted. A total of 122 CA patients admitted to Department of Emergency of Shandong Provincial Mining Industry Group Company Central Hospital from July 2013 to December 2017 were enrolled. They were divided into standard cardiopulmonary resuscitation (S-CPR) group (n = 62) and IAPP-CPR group (n = 60) according to order of admission...
May 2018: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/29763712/cerebral-tissue-oximetry-levels-during-prehospital-management-of-cardiac-arrest-a-prospective-observational-study
#7
Gregor Prosen, Strnad Matej, Stephanie J Doniger, Andrej Markota, Andraž Stožer, Vesna Borovnik-Lesjak, Dušan Mekiš
INTRODUCTION: Near-infrared spectroscopy (NIRS) enables continuous monitoring of regional oximetry (rSO2 ). The aim of this study was to describe dynamics of regional cerebral oximetry levels during out of hospital cardiac arrest (OHCA) resuscitation, specifically around the time of restoration of spontaneous circulation (ROSC). METHODS: This prospective observational study was performed in the prehospital setting during cardio-pulmonary resuscitation (CPR) of OHCA patients...
May 12, 2018: Resuscitation
https://www.readbyqxmd.com/read/29759706/the-human-left-atrial-venous-circulation-as-a-vascular-route-for-atrial-pharmacological-therapies-effects-of-ethanol-infusion
#8
Miguel Valderrábano, Percy Francisco Morales, Moisés Rodríguez-Mañero, Candela Lloves, Paul A Schurmann, Amish S Dave
OBJECTIVES: This study catalogued the human venous left atrium (LA) circulation system and the ablative effects of ethanol in different branches. BACKGROUND: Vascular routes to target the LA could have significant therapeutic potential. Beyond the vein of Marshall (VOM), the fluoroscopic LA venous anatomy has not been described. METHODS: Patients undergoing ethanol infusion in the VOM as adjunctive therapy to atrial fibrillation (AF) catheter ablation were included in this study...
September 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29757371/outcomes-of-total-anomalous-pulmonary-venous-drainage-repair-in-neonates-with-univentricular-circulation
#9
Matthew S Yong, Michael Z L Zhu, Yves d'Udekem, Igor E Konstantinov
Survival after surgery for isolated total anomalous pulmonary venous drainage has improved in the current era. However, outcomes of total anomalous pulmonary venous drainage repair in patients with univentricular circulation are associated with high mortality. Furthermore, outcomes of surgery in neonates with univentricular circulation are rarely reported among larger studies. Hence, we reviewed our experience (n = 19) with this population at a single institution (between 1986 and 2015) to identify specific subgroups with high mortality...
May 10, 2018: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29756161/risk-factors-for-failure-of-systemic-to-pulmonary-artery-shunts-in-biventricular-circulation
#10
Keti Vitanova, Cornelius Leopold, Jelena Pabst von Ohain, Cordula Wolf, Elisabeth Beran, Rüdiger Lange, Julie Cleuziou
Systemic-to-pulmonary artery shunt placement is an established palliative procedure for congenital heart disease, but it is associated with high morbidity and mortality. Data of all patients with biventricular circulation who underwent systemic-to-pulmonary artery shunt implantation between 2000 and 2016 were reviewed. Endpoints of the study were shunt failure and shunt-related mortality. Shunt failure was defined as any shunt dysfunction requiring intervention or reoperation. Shunt-related mortality was defined as death due to shunt dysfunction...
May 14, 2018: Pediatric Cardiology
https://www.readbyqxmd.com/read/29755795/double-bolus-alteplase-therapy-during-cardiopulmonary-resuscitation-for-cardiac-arrest-due-to-massive-pulmonary-embolism-guided-by-focused-bedside-echocardiography
#11
Hafiz B Mahboob, Bruce W Denney
Massive pulmonary embolism (PE) frequently leads to cardiac arrest (CA) which carries an extremely high mortality rate. Although available, randomized trials have not shown survival benefits from thrombolytic use. Thrombolytics however have been used successfully during resuscitation in clinical practice in multiple case reports and in retrospective studies. Recent resuscitation guidelines recommend using alteplase for PE related CA; however they do not offer a standardized treatment regimen. The most consistently applied approach is an intravenous bolus of 50 mg tissue plasminogen activator (t-PA) early during cardiopulmonary resuscitation (CPR)...
2018: Case Reports in Critical Care
https://www.readbyqxmd.com/read/29754839/-retrospective-study-of-25-cases-of-pulmonary-mucormycosis-in-acute-leukaemia
#12
REVIEW
D Caillot, C Legouge, I Lafon, E Ferrant, P B Pagès, A Plocque, L Estivalet, S Valot, F Dalle, H Abou Hanna, M-L Chretien
INTRODUCTION: In acute leukaemia (AL), the occurrence of pulmonary mucormycosis (PM), the incidence of which is increasing, as a result of chemotherapy induced marrow aplasia, remains a life threatening complication. METHODS: Analysis of clinical, biological and thoracic CT characteristics of patients with PM developing during the treatment of AL between 2000 and 2015. Day 0 (D0) was defined as the day with first CT evidence of PM. RESULTS: Among 1193 patients, 25 cases of PM were recorded during 2099 episodes of bone marrow aplasia...
May 10, 2018: Revue des Maladies Respiratoires
https://www.readbyqxmd.com/read/29753296/mortality-specific-comorbidity-among-inpatients-with-epilepsy-a-preliminary-cross-sectional-study-in-west-china
#13
Yang Si, Xiaoqiang Xiao, Hongbin Sun
PURPOSE: The purpose of this study was to investigate the current condition of mortality-specific comorbidity among hospitalized patients with epilepsy (PWE). METHODS: The discharge abstract records of PWE from over 730,000 admissions were extracted from the hospital medical database. Fourteen mortality-related comorbidities from an epilepsy-specific index (ESI) were selected for the present assessment. The hospital-based prevalence of these comorbidities was estimated...
May 9, 2018: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/29753293/risk-assessment-of-in-hospital-mortality-of-patients-with-epilepsy-a-large-cohort-study
#14
Yang Si, Xiaoqiang Xiao, Shunju Xiang, Jing Liu, Qianning Mo, Hongbin Sun
PURPOSE: This study aimed to explore the mortality risks of hospitalized patients with epilepsy (PWE). METHODS: Our data source was extracted from discharge abstracts in a hospital medical database. Various clinical variables, including demographical characteristics, natural features of epilepsy, and comprehensive set of comorbidities, were screened to investigate the risk. Comorbidities were defined using a validated ICD-10-based classification. The distributions of comorbid conditions and demographics were presented...
May 9, 2018: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/29751952/relation-of-velocity-time-integral-of-the-left-ventricular-outflow-tract-to-that-of-the-descending-thoracic-aorta-and-usefulness-of-a-fixed-ratio-for-internal-validation
#15
Rupesh Ranjan, Erik M Valez, Anshul Haldipur, Nelson B Schiller
Measurement of left ventricular outflow tract velocity-time integral (LVOT VTI) is technician-, instrument-, and reader-dependent; variability is more common for pulsed-wave Doppler than continuous-wave Doppler. We hypothesize that in a population with normal cardiac structure and function, LVOT VTI is higher than VTI of the descending thoracic aorta (DTA) and this relation may be used clinically to validate the former. Furthermore, the DTA VTI could also be used to estimate LVOT. We retrospectively compared the LVOT VTI against VTI measured from DTA, abdominal aorta, and pulmonary artery among 108 healthy subjects...
April 3, 2018: American Journal of Cardiology
https://www.readbyqxmd.com/read/29748308/fibroblast-growth-factor-23-and-klotho-contribute-to-airway-inflammation
#16
Stefanie Krick, Alexander Grabner, Nathalie Baumlin, Christopher Yanucil, Scott Helton, Astrid Grosche, Juliette Sailland, Patrick Geraghty, Liliana Viera, Derek W Russell, J Michael Wells, Xin Xu, Amit Gaggar, Jarrod Barnes, Gwendalyn D King, Michael Campos, Christian Faul, Matthias Salathe
Circulating levels of fibroblast growth factor (FGF) 23 are associated with systemic inflammation and increased mortality in chronic kidney disease. α-klotho, a co-receptor for FGF23, is downregulated in chronic obstructive pulmonary disease (COPD). However, whether FGF23 and klotho-mediated FGFR activation delineates a pathophysiologic mechanism in COPD remains unclear. We hypothesized that FGF23 can potentiate airway inflammation via klotho independent FGFR4 activation. FGF23 and its effect were studied using plasma and transbronchial biopsies from COPD and control patients and primary human bronchial epithelial cells isolated from COPD patients as well as a murine COPD model...
May 10, 2018: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/29747640/fibrocytes-are-increased-in-lung-and-peripheral-blood-of-patients-with-idiopathic-pulmonary-fibrosis
#17
P Heukels, J A C van Hulst, M van Nimwegen, C E Boorsma, B N Melgert, L M van den Toorn, K A T Boomars, M S Wijsenbeek, H Hoogsteden, J H von der Thüsen, R W Hendriks, M Kool, B van den Blink
BACKGROUND: Fibrocytes are implicated in Idiopathic Pulmonary Fibrosis (IPF) pathogenesis and increased proportions in the circulation are associated with poor prognosis. Upon tissue injury, fibrocytes migrate to the affected organ. In IPF patients, circulating fibrocytes are increased especially during exacerbations, however fibrocytes in the lungs have not been examined. Therefore, we sought to evaluate if fibrocytes can be detected in IPF lungs and we compare percentages and phenotypic characteristics of lung fibrocytes with circulating fibrocytes in IPF...
May 10, 2018: Respiratory Research
https://www.readbyqxmd.com/read/29746313/avalonelite-double-lumen-cannula-for-total-cavopulmonary-assist-in-failing-fontan-sheep-model-with-valved-extracardiac-conduit
#18
Cheng Zhou, Dongfang Wang, Francesca Condemi, Guangfeng Zhao, Stephen Topaz, Cherry Ballard-Croft, Joseph B Zwischenberger
The AvalonElite double lumen cannula (DLC) provides total cavopulmonary assist (CPA) in failing Fontan sheep, but recirculation limits reliability. To improve CPA performance, a two-valve extracardiac conduit (ECC) was used to bracket infusion blood toward pulmonary artery (PA). A total cavopulmonary connection with failing Fontan circulation adult sheep model was created with valved ECC (n = 6). The valved ECC was connected to superior/inferior venae cavae (SVC/IVC) and right PA. The AvalonElite DLC was inserted from right jugular vein with infusion opening between the ECC valves...
May 8, 2018: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/29746142/pulmonary-vascular-involvement-in-copd-is-there-a-pulmonary-vascular-phenotype
#19
Gabor Kovacs, Alvar Agusti, Joan Albert Barberà, Bartolome Celli, Gerard Criner, Marc Humbert, Don D Sin, Norbert Voelkel, Horst Olschewski
Although often clinically unrecognized, the pulmonary circulation is frequently affected in patients with chronic obstructive pulmonary disease (COPD), and the presence of pulmonary vascular disease is associated with poor prognosis and frequent exacerbations. In most cases the presenting pulmonary hypertension (PH) is relatively mild, but in a subset of COPD patients, the presence of certain clinical features supports the existence of a "pulmonary vascular phenotype". Such a phenotype would be characterized by severe pre-capillary PH with strongly elevated pulmonary vascular resistance, moderate airflow limitation, severely decreased diffusion capacity for carbon monoxide, normo- or hypocapnia, circulatory exercise limitation and progressive right heart failure...
May 10, 2018: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29742226/influenza-a-non-h1n1-associated-with-acute-respiratory-failure-and-acute-renal-failure-in-a-previously-vaccinated-cystic-fibrosis-patient
#20
Louise Piva Penteado, Cecília Susin Osório, Antônio Balbinotto, Paulo de Tarso Roth Dalcin
In the 2014 - 2015 season, most influenza infections were due to A (H3N2) viruses. More than two-thirds of circulating A (H3N2) viruses are antigenically and genetically different (drifted) from the A (H3N2) vaccine component of 2014 - 2015 northern and southern Hemisphere seasonal influenza vaccines. The purpose of this paper is to report a case of seasonal influenza A non-H1N1 infection that occurred in June 2015 in an adult cystic fibrosis patient with severe lung disease previously vaccinated with the anti-flu trivalent vaccine...
March 2018: Revista Brasileira de Terapia Intensiva
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