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Pulmonary circulation

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https://www.readbyqxmd.com/read/28734448/alternative-strategy-for-biventricular-assist-device-in-an-infant-with-hypertrophic-cardiomyopathy
#1
John C Dykes, Olaf Reinhartz, Christopher S Almond, Vamsi Yarlagadda, Jenna Murray, David N Rosenthal, Katsuhide Maeda
We report an infant with hypertrophic cardiomyopathy who underwent biventricular assist device placement with two 15-mL Berlin Heart EXCOR pediatric ventricular assist devices using an alternative atrial cannulation strategy. The systemic circulation was supported by left atrium (LA) to aorta cannulation. The LA was accessed through the right atrium by extending a 6-mm EXCOR cannula with a Gore-Tex graft connected to an atrial septal defect. The pulmonary circulation was supported with cannulation of the right atrium to pulmonary artery...
August 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28734437/two-pumps-for-single-ventricle-mechanical-support-for-establishment-of-biventricular-circulation
#2
Stanislav Ovroutski, Oliver Miera, Thomas Krabatsch, Felix Berger, Joachim Photiadis, Evgenii Potapov
A 31-year-old patient with a univentricular heart and double-inlet left ventricle, moderate pulmonary stenosis, and severe mitral valve regurgitation experienced irreversible heart failure after mitral valve replacement. "Biventricular" mechanical circulatory support was initiated. The systemic circulation was supported using the HeartWare ventricular assist device (HVAD) (HeartWare, Framingham, MA) pump in the usual manner. The second pump was inserted into the right atrium and connected to the pulmonary artery after closure of the pulmonary valve and atrial separation...
August 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28728934/beyond-body-mass-index-obesity-and-lung-disease
#3
REVIEW
Ubong Peters, Benjamin T Suratt, Jason H T Bates, Anne E Dixon
The worldwide prevalence of obesity has increased rapidly in the last three decades, and this has led to important changes in the pathogenesis and clinical presentation of many common diseases. This review article examines the relationship between obesity and lung disease, highlighting some of the major findings that have advanced our understanding of the mechanisms contributing to this relationship. Changes in pulmonary function related to fat mass are important, but obesity is much more than simply a state of mass loading, and body mass index is only a very indirect measure of metabolic health...
July 17, 2017: Chest
https://www.readbyqxmd.com/read/28722077/invasive-haemodynamic-evaluation-of-the-pulmonary-circulation-in-pulmonary-hypertension
#4
Alberto Pagnamenta, Andrea Azzola, Maurice Beghetti, Frédéric Lador, On Behalf Of The Swiss Society Of Pulmonary Hypertension
The term pulmonary hypertension refers to a serious condition characterised by high pulmonary vascular pressure, mainly as a consequence of various cardiac and respiratory diseases. Current clinical classification of pulmonary hypertension considers five distinct groups. Transthoracic echocardiography represents the first and most important noninvasive screening tool for estimating the probability of pulmonary hypertension. The diagnostic approach to pulmonary hypertension is supported by a proposed algorithm, which identifies the underlying cause...
July 19, 2017: Swiss Medical Weekly
https://www.readbyqxmd.com/read/28720746/-a-rare-case-of-ruptured-internal-carotid-posterior-communicating-artery-aneurysm-associated-with-contralateral-delayed-oculomotor-nerve-palsy
#5
Chika Somagawa, Yutaka Fukuda, Shota Yoshimura, Kei Satoh, Takeshi Hiu, Tomonori Ono, Ryujirou Ushijima, Keisuke Toda, Keisuke Tsutsumi
A 55-year-old man presented with difficulty breathing, chest pain, and disturbance of consciousness, and was transferred to our hospital. Initial whole body CT revealed a diffuse subarachnoid hemorrhage(SAH)with severe pulmonary edema that was considered neurogenic in origin. He received controlled ventilation under sedation and conservative care for the SAH. One day after the onset of the SAH, his left pupil suddenly became dilated to 6mm, with no reaction to light. Head CT showed no new bleeding. Subsequent CT angiogram revealed a right internal carotid-posterior communicating artery aneurysm(IC-PC AN)with a posterior-lateral projection; however, no vessel abnormality was observed in the left anterior or posterior circulations...
July 2017: No Shinkei Geka. Neurological Surgery
https://www.readbyqxmd.com/read/28720095/fibrocyte-measurement-in-peripheral-blood-correlates-with-number-of-cultured-mature-fibrocytes-in-vitro-and-is-a-potential-biomarker-for-interstitial-lung-disease-in-rheumatoid-arthritis
#6
Søren Andreas Just, Hanne Lindegaard, Eva Kildall Hejbøl, Jesper Rømhild Davidsen, Niels Bjerring, Søren Werner Karlskov Hansen, Henrik Daa Schrøder, Inger Marie Jensen Hansen, Torben Barington, Christian Nielsen
BACKGROUND: Interstitial lung disease (ILD) can be a severe extra-articular disease manifestation in Rheumatoid Arthritis (RA). A potential role of fibrocytes in RA associated ILD (RA-ILD) has not previously been described. We present a modified faster method for measuring circulating fibrocytes, without intracellular staining. The results are compared to the traditional culture method, where the number of monocytes that differentiate into mature fibrocytes in vitro are counted. The results are following compared to disease activity in patients with severe asthma, ILD, RA (without diagnosed ILD) and RA with verified ILD (RA-ILD)...
July 18, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28719302/a-fatal-hantavirus-pulmonary-syndrome-misdiagnosed-as-dengue-an-investigation-into-the-first-reported-case-in-rio-de-janeiro-state-brazil
#7
Renata Carvalho de Oliveira, Alexandro Guterres, Bernardo Rodrigues Teixeira, Jorlan Fernandes, João Marcos Penna Júnior, Reynaldo de Jesus Oliveira Júnior, Liana Strecht Pereira, João Bosco Júnior, Patrícia Soares Meneguete, Cristina Maria Giordano Dias, Cibele Rodrigues Bonvicino, Paulo Sérgio D'Andrea, Elba Regina Sampaio de Lemos
We report the results of an investigation into a fatal case of hantavirus pulmonary syndrome (HPS) in Rio de Janeiro State, Brazil, where the disease had not been reported previous to 2015. Following the notification of an HPS case, serum samples were collected from the household members and work contacts of the HPS patient and tested for antibody to hantaviruses. Seroprevalence of 22% (10/45) was indicated for hantavirus out of 45 human samples tested. Blood and tissue samples were collected from 72 rodents during fieldwork to evaluate the prevalence of hantavirus infection, by using enzyme-linked immunosorbent assay IgG, and to characterize the rodent hantavirus reservoir(s), by reverse transcription polymerase chain reaction and sequencing...
July 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28716896/poor-prognosis-indicated-by-venous-circulating-tumor-cell-clusters-in-early-stage-lung-cancers
#8
Vasudha Murlidhar, Rishindra M Reddy, Shamileh Fouladdel, Lili Zhao, Martin K Ishikawa, Svetlana Grabauskiene, Zhuo Zhang, Jules Lin, Andrew C Chang, Philip W Carrott, William R Lynch, Mark B Orringer, Chandan Kumar-Sinha, Nallasivam Palanisamy, David G Beer, Max S Wicha, Nithya Ramnath, Ebrahim Azizi, Sunitha Nagrath
Early detection of metastasis can be aided by circulating tumor cells (CTCs), which also show potential to predict early relapse. Due to the limited CTC numbers in peripheral blood in early stages, we investigated CTCs in pulmonary vein blood accessed during surgical resection of tumors. Pulmonary vein (PV) and peripheral vein (Pe) blood specimens from patients with lung cancer were drawn during the perioperative period and assessed for CTC burden using a microfluidic device. From 108 blood samples analyzed from 36 patients, PV had significantly higher number of CTCs compared to pre-operative Pe (p<0...
July 17, 2017: Cancer Research
https://www.readbyqxmd.com/read/28714905/effects-of-eicosapentaenoic-acid-epa-and-docosahexaenoic-acid-dha-on-fetal-pulmonary-circulation-an-experimental-study-in-fetal-lambs
#9
Dyuti Sharma, Estelle Aubry, Thavarak Ouk, Ali Houeijeh, Véronique Houfflin-Debarge, Rémi Besson, Philippe Deruelle, Laurent Storme
Background: Persistent pulmonary hypertension of the newborn (PPHN) causes significant morbidity and mortality in neonates. n-3 Poly-unsaturated fatty acids have vasodilatory properties in the perinatal lung. We studied the circulatory effects of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) in fetal sheep and in fetal pulmonary arterial rings. Methods: At 128 days of gestation, catheters were placed surgically in fetal systemic and pulmonary circulation, and a Doppler probe around the left pulmonary artery (LPA)...
July 16, 2017: Nutrients
https://www.readbyqxmd.com/read/28713578/retrospective-evaluation-of-pimobendan-and-sildenafil-therapy-for-severe-pulmonary-hypertension-due-to-lung-disease-and-hypoxia-in-28-dogs-2007-2013
#10
Lisa A Murphy, Nicholas Russell, Domenico Bianco, Reid K Nakamura
Pulmonary hypertension (PH) is the persistent abnormal increase in pulmonary artery (PA) pressure and in dogs is usually secondary to congenital disease causing pulmonary over circulation, chronic respiratory disease and elevated left atrial pressure. Sildenafil (SF) is a phosphodiesterase (PDE) V inhibitor that causes pulmonary artery (PA) vasodilation by increasing pulmonary vascular concentrations of cyclic guanosine monophosphate which subsequently increases the activity of endogenous nitric oxide. Pimobendan (PB) is a PDE III inhibitor with calcium sensitizing effects thereby exerting positive inotropy and vasodilation...
May 2017: Veterinary Medicine and Science
https://www.readbyqxmd.com/read/28707162/pulmonary-surfactant-associated-proteins-and-inflammatory-factors-in-obstructive-sleep-apnea
#11
Dongmei Lu, Ayiniger Abulimiti, Ting Wu, Ailigen Abudureyim, Nanfang Li
PURPOSE: Pulmonary surfactant (PS) plays roles in promoting the removal of the liquid, host defense, and immune regulation in the tracheal, bronchial, and alveoli epithelium. PS protein expression level can be regulated by oxygen levels and related free radicals. Obstructive sleep apnea (OSA) is featured with oxygen free radical production for damaging epithelial tissues and thus may affect PS production. The study was to explore the relationship between PS protein and OSA severity. METHODS: We collected serum and bronchoalveolar lavage fluid (BALF) samples from 35 OSA patients and 22 healthy subjects...
July 13, 2017: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/28705908/importance-of-kynurenine-in-pulmonary-hypertension
#12
Bence M Nagy, Chandran Nagaraj, Andreas Meinitzer, Neha Sharma, Rita Papp, Vasile Foris, Bahil Ghanim, Grazyna Kwapiszewska, Gabor Kovacs, Walter Klepetko, Thomas R Pieber, Harald Mangge, Horst Olschewski, Andrea Oslchewski
The tryptophan metabolite kynurenine is significantly increased in pulmonary arterial hyper-tension (PAH) patients, and it is a potent vasodilator of systemic arteries. Our aim was to in-vestigate the role of kynurenine in the pulmonary circulation. Serum tryptophan, kynurenine and kynurenic-acid levels were measured in 20 idiopathic PAH (IPAH) patients, 20 healthy controls and 20 patients with chronic lung disease or meta-bolic syndrome without-PH. Laser-dissected pulmonary arteries from IPAH and control lungs were tested for the expression of IDO, the rate-limiting enzyme for the conversion from tryptophan to kynurenine...
July 13, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28705304/clinical-practice-of-acute-respiratory-distress-syndrome-in-japan-a-nationwide-survey-and-scientific-evidences
#13
Sadatomo Tasaka, Koichiro Tatsumi
BACKGROUND: There has been limited information about epidemiology and clinical practice of acute respiratory distress syndrome (ARDS) in Japan. METHODS: An invitation letter to the web-based survey was mailed to all 871 board certified hospitals of the Japanese Respiratory Society. The questionnaires were designed to collect data on epidemiology and clinical practice of ARDS, including diagnostic measures and therapeutics. RESULTS: Within 4 months of the survey period, valid responses were obtained from 296 (34%) hospitals...
July 2017: Respiratory Investigation
https://www.readbyqxmd.com/read/28705229/brugada-syndrome-in-a-patient-with-amyotrophic-lateral-sclerosis-a-case-report
#14
Anusha Battineni, Rohit Gummi, Naresh Mullaguri, Raghav Govindarajan
BACKGROUND: Amyotrophic lateral sclerosis is a fatal neuromuscular disorder characterized by progressive death of the upper and lower motor neurons in the central nervous system. Patients with this disease die mostly as a result of respiratory failure; however, owing to prolonged survival through assisted ventilation, cardiovascular causes are increasingly responsible for mortality. We report what is to the best of our knowledge the first case of type 2 Brugada syndrome causing ventricular tachyarrhythmia and cardiac arrest in a patient with upper limb onset amyotrophic lateral sclerosis...
July 14, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28704507/regular-moist-snuff-dipping-does-not-affect-endurance-exercise-performance
#15
Frida Björkman, Fredrik Edin, C Mikael Mattsson, Filip Larsen, Björn Ekblom
Physiological and medical effects of snuff have previously been obtained either in cross-sectional studies or after snuff administration to non-tobacco users. The effects of snuff cessation after several years of daily use are unknown. 24 participants with >2 years of daily snuff-use were tested before and after >6 weeks snuff cessation (SCG). A control group (CO) of 11 snuff users kept their normal habits. Resting heart rate (HR) and blood pressure (BP) were significantly lower in SCG after snuff cessation, and body mass was increased by 1...
2017: PloS One
https://www.readbyqxmd.com/read/28703280/the-oregonheart-total-artificial-heart-design-and-performance-on-a-mock-circulatory-loop
#16
Jeremy Glynn, Howard Song, Bryan Hull, Stanley Withers, Jill Gelow, James Mudd, Albert Starr, Richard Wampler
Widespread use of heart transplantation is limited by the scarcity of donor organs. Total artificial heart (TAH) development has been pursued to address this shortage, especially to treat patients who require biventricular support. We have developed a novel TAH that utilizes a continuously spinning rotor that shuttles between two positions to provide pulsatile, alternating blood flow to the systemic and pulmonary circulations without artificial valves. Flow rates and pressures generated by the TAH are controlled by adjusting rotor speed, cycle frequency, and the proportion of each cycle spent pumping to either circulation...
July 13, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28701355/mir-4632-mediates-pdgfbb-induced-proliferation-and-anti-apoptosis-of-human-pulmonary-artery-smooth-muscle-cells-via-targeting-cjun
#17
Zhengjiang Qian, Yanjiao Li, Jidong Chen, Xiang Li, Deming Gou
MicroRNAs (miRNAs) can regulate proliferative status of pulmonary artery smooth muscle cells (PASMCs), which is a core factor modulating pulmonary vascular remodeling diseases, such as atherosclerosis and pulmonary arterial hypertension (PAH). Our previous work has shown that miR-4632, a rarely reported miRNA, is significantly downregulated in Platelet-Derived Growth Factor (PDGF)BB-stimulated human pulmonary artery smooth muscle cells (HPASMCs), yet its cell function and the underlying molecular mechanisms remain to be elucidated...
July 12, 2017: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/28700752/role-of-a-novel-immune-modulating-ddr2-expressing-population-in-silica-induced-pulmonary-fibrosis
#18
Lindsay T McDonald, Sara D Johnson, Dayvia L Russell, M Rita I Young, Amanda C LaRue
Micro-injuries associated with chronic inhaled particle exposures are linked with activation of the immune response and are thought to contribute to progression of fibrotic disease. In the pulmonary environment, we have previously demonstrated a heterogeneous population of circulating fibroblast precursors (CFPs), which are defined by expression of the pan-leukocyte marker CD45 and the collagen receptor, discoidin domain receptor-2 (DDR2). This population is derived from the hematopoietic stem cell, expresses collagen, and has a fibroblastic morphology in vitro...
2017: PloS One
https://www.readbyqxmd.com/read/28696894/preference-of-aerosolized-pirfenidone-to-oral-intake-an-experimental-model-of-pulmonary-fibrosis-by-paraquat
#19
Rokhsana Rasooli, Hamid Rajaian, Abbas Pardakhty, Ali Mandegary
BACKGROUND: Inhalation drug delivery is a fast, effective, and safe route of delivering medication directly to the lungs. Thanks to the large surface area and highly vascularized epithelium in lung, pulmonary drug delivery has been considered as an effective route to deliver drugs to the systemic circulation. Pirfenidone (PF), an oral antifibrotic agent, has been shown to slow down the progression of the lung fibrosis. Inhalation or intrapulmonary delivery of PF appears to be a good alternative to optimize drug delivery and minimize the dosage, adverse and nonspecific effects...
July 11, 2017: Journal of Aerosol Medicine and Pulmonary Drug Delivery
https://www.readbyqxmd.com/read/28695560/minimally-invasive-extracorporeal-circulation-excellent-outcome-and-life-expectancy-after-coronary-artery-bypass-grafting-surgery
#20
Bernhard Winkler, Paul Philipp Heinisch, Grzegorz Zuk, Katarzyna Zuk, Brigitta Gahl, Hans-Jörg Jenni, Alexander Kadner, Christoph Huber, Thierry Carrel
OBJECTIVE: Coronary artery bypass grafting (CABG) remains the gold standard for complex revascularisation in multivessel disease. The concept of the minimally invasive extracorporeal circulation circuit (MiECC) was introduced to minimise pathophysiological side effects of conventional extracorporeal circulation. This study presents early and long-term outcomes after CABG with use of MiECC in a single-centre consecutive patient cohort. METHODS: From 1 January 2005 to 31 December 2010, 2130 patients underwent isolated CABG with MiECC at our centre...
July 11, 2017: Swiss Medical Weekly
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