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https://www.readbyqxmd.com/read/28741841/pulmonary-valve-opening-with-two-rotary-left-ventricular-assist-devices-for-biventricular-support
#1
Eric L Wu, Frank Nestler, Matthias Kleinheyer, Michael C Stevens, Jo P Pauls, John F Fraser, Shaun D Gregory
Right ventricular failure is a common complication associated with rotary left ventricular assist device (LVAD) support. Currently, there is no clinically approved long-term rotary right ventricular assist device (RVAD). Instead, clinicians have implanted a second rotary LVAD as RVAD in biventricular support. To prevent pulmonary hypertension, the RVAD must be operated by either reducing pump speed or banding the outflow graft. These modes differ in hydraulic performance, which may affect the pulmonary valve opening (PVO) and subsequently cause fusion, valvular insufficiency, and thrombus formation...
July 25, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28741094/systolic-function-of-right-ventricular-outflow-tract-is-a-better-predictor-to-exercise-performance-after-pulmonary-valve-replacement-in-tetralogy-of-fallot
#2
Jianhua Li, Shuhua Luo, Fei Liu, Qi An
Debate on the proper timing of pulmonary valve replacement (PVR) after repair of tetralogy of Fallot is still continuing. We aim to clarify how the different components of right ventricle (RV) changed with relieved volume overload in the remodeling process after pulmonary valve replacement and gain a clear idea of the relationship between different right ventricle components function and exercise capacity after PVR in these patients. The medical records and results of cardiac magnetic resonance imaging and cardiopulmonary exercise testing of 25 consecutive eligible patients were reviewed...
July 24, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28740625/pulmonary-valve-replacement-in-patients-with-corrected-tetralogy-of-fallot
#3
Fotios M Mitropoulos, Meletios A Kanakis, Christos Ntellos, Constantinos Loukas, Periklis Davlouros, Theophili Kousi, Andrew C Chatzis
Introduction: Development of pulmonary insufficiency in patients with surgically corrected tetralogy of Fallot (TOF) may lead to severe right heart failure with serious consequences. We herein present our experience with pulmonary valve replacement (PVR) in these patients. Methods: From 2005-2013, 99 consecutive patients (71 males/28 females, mean age 38±8 years), underwent PVR after 7 to 40 (mean 29 ± 8) years from the initial correction. Seventy nine of the symptomatic patients presented in NYHA II, 14 in III and 2 in IV...
2017: Journal of Cardiovascular and Thoracic Research
https://www.readbyqxmd.com/read/28737621/baroreflex-activation-therapy-a-new-approach-to-the-management-of-advanced-heart-failure-with-reduced-ejection-fraction
#4
Edoardo Gronda, Darrel Francis, Faiez Zannad, Christian Hamm, Josep Brugada, Emilio Vanoli
: Chronic heart failure is a common clinical condition characterized by persistent excessive sympathetic nervous system activation. The derangement of the sympathetic activity has relevant implications for disease progression and patient survival. Aiming to positively impact patient outcome, autonomic nervous system modulatory therapies have been developed and tested in animal and clinical studies. As a general gross assumption, direct vagal stimulation and baroreflex activation are considered equivalent. This assumption does not take into account the fact that direct cervical vagal nerve stimulation involves activation of both afferent and efferent fibers innervating not only the heart, but the entire visceral system, leading to undesired responses to and from this compartment...
July 21, 2017: Journal of Cardiovascular Medicine
https://www.readbyqxmd.com/read/28737534/considerations-in-the-understanding-of-venous-outflow-in-the-retinal-capillary-plexus
#5
Sean T Garrity, Michel Paques, Alain Gaudric, K Bailey Freund, David Sarraf
No abstract text is available yet for this article.
July 20, 2017: Retina
https://www.readbyqxmd.com/read/28737365/vim-thalamotomy-in-the-treatment-of-holmes-tremor-secondary-to-hiv-associated-midbrain-lesion-a-case-report
#6
José O Oliveira, Soraya A Jorge Cecilio, Matheus Fernandes Oliveira, Leonardo R Takahashi, Alexandro R Galassi, Vanessa M Holanda, José M Rotta
Holmes' tremor (rubral tremor, cerebellar outflow tremor) is characterized by rest, intention and postural tremor, often localized to one upper extremity, associated with ipsilateral dysmetria and dysdiadochokinesia. We describe a case of successful treatment of Holmes' tremor with unilateral nucleus ventralis intermedius (VIM) thalamotomy. The subject is a 43-year-old woman with unremarkable previous medical history. She presented with complete left hemiparesis in the context of human immunodeficiency syndrome and the magnetic resonance image disclosed a contrast-enhancing lesion in right brain peduncle, in topography of red nucleus...
October 2017: Journal of Neurosurgical Sciences
https://www.readbyqxmd.com/read/28735892/clinical-and-echocardiographic-correlates-of-left-atrial-function-index-the-framingham-offspring-study
#7
Mayank Sardana, Gregory Nah, Connie W Tsao, Adedotun A Ogunsua, Eric Vittinghoff, Randell C Thomas, Susan Cheng, Aditya Vaze, Jayashri R Aragam, Gary F Mitchell, Emelia J Benjamin, Ramachandran S Vasan, Gerard P Aurigemma, Nelson B Schiller, David D McManus, Nisha I Parikh
BACKGROUND: Left atrial (LA) remodeling is a predictor of cardiovascular disease (CVD). We performed measurement of the LA function index (LAFI), a composite measure of LA structure and function, in a community-based cohort and here report the distribution and cross-sectional correlates of LAFI. METHODS: In 1,719 Framingham Offspring Study participants (54% women, mean age 66 ± 9 years), we derived LAFI from the LA emptying fraction, left ventricular (LV) outflow tract velocity time integral, and indexed maximal LA volume...
July 20, 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/28735125/management-of-arteriovenous-malformations-associated-with-developmental-venous-anomalies-a-literature-review-and-report-of-two-cases
#8
Michael Zhang, Ian D Connolly, Mario K Teo, George Yang, Robert Dodd, Michael Marks, Mario Zuccarello, Gary K Steinberg
OBJECTIVE: Cerebrovascular malformation classification has revealed intermediary lesions that warrant further review due to their unusual presentation and management. We present two cases of arteriovenous malformations (AVMs) associated with a developmental venous anomaly (DVA), and discuss the efficacy of previously published management strategies. METHODS: Two cases of AVMs associated with DVA were identified and a literature search for published cases between 1980 and 2016 was conducted...
July 19, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28734891/ct-defined-prosthesis-patient-mismatch-downgrades-frequency-and-severity-and%C3%A2-demonstrates-no-association-with-adverse-outcomes-after-tavr
#9
John Mooney, Stephanie L Sellers, Phillip Blanke, Philippe Pibarot, Rebecca T Hahn, Danny Dvir, Pamela S Douglas, Neil J Weissman, Susheel K Kodali, Vinod H Thourani, Hasan Jilaihawi, Omar Khalique, Craig R Smith, Shaw Hua Kueh, Mickael Ohana, Romi Grover, Christopher Naoum, Aaron Crowley, Wael A Jaber, Maria C Alu, Rupa Parvataneni, Michael Mack, John G Webb, Martin B Leon, Jonathon A Leipsic
OBJECTIVES: This study sought to determine if indexed effective orifice area (EOAi), using left ventricular outflow tract measured from computed tomography (EOAiCT), reclassified prosthesis-patient mismatch (PPM) compared with conventional echocardiogram-defined measurements (EOAiTTE). BACKGROUND: PPM does not predict mortality following transcatheter aortic valve replacement (TAVR). However, it is unknown if the EOAiCT of the left ventricular outflow tract improves risk stratification...
July 13, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28734214/effects-of-damming-on-the-distribution-and-methylation-of-mercury-in-wujiang-river-southwest-china
#10
Lei Zhao, Yanna Guo, Bo Meng, Heng Yao, Xinbin Feng
Newly built reservoirs are regarded as sensitive ecosystem for mercury (Hg) methylation. A comprehensive study was conducted to understand the influence of damming on the distribution and methylation of Hg within a river-reservoir ecosystem in Wujiang River Basin (WRB), Southwest China. Hg species in inflow-outflow rivers of six cascade reservoirs were analyzed each month during 2006. Mean concentrations of total Hg (THg) and methylmercury (MeHg) in river water in WRB were 3.41 ± 1.98 ng L(-1) and 0.15 ± 0...
July 17, 2017: Chemosphere
https://www.readbyqxmd.com/read/28733780/robotic-left-lateral-sectionectomy-as-stepwise-approach-for-cirrhotic-liver
#11
Raphael L C Araujo, Luís Antônio de Castro, Fernando E C Fellipe, Diego Burgardt, Durval R Wohnrath
Laparoscopy is considered the gold standard approach to perform left lateral sectionectomy (LLS). Furthermore, laparoscopy for cirrhotic patients can reduce intraoperative bleeding and postoperative morbidity when compared to open surgery. Although robotic surgery is feasible for both minor and major liver resections, it remains a work in progress and only few series reported this approach for cirrhotic patients. We reported two cases of 62-year-old men, both with hepatitis C virus and alcoholic cirrhosis, but with compensated liver functions (MELD 9-10 and Child-Pugh A5-A6)...
July 21, 2017: Journal of Robotic Surgery
https://www.readbyqxmd.com/read/28733450/muscle-sympathetic-nerve-activity-and-volume-regulating-factors-in-healthy-pregnant-and-non-pregnant-women
#12
Nisha Charkoudian, Charlotte W Usselman, Rachel J Skow, Jeffery S Staab, Colleen Glyde Julian, Michael K Stickland, Radha S Chari, Rshmi Khurana, Sandra T Davidge, Margie H Davenport, Craig D Steinback
Healthy, normotensive human pregnancies are associated with striking increases in both plasma volume and vascular sympathetic nerve activity (SNA). In non-pregnant humans, volume regulatory factors including plasma osmolality, vasopressin and the renin-angiotensin-aldosterone system have important modulatory effects on control of sympathetic outflow. We hypothesized that pregnancy would be associated with changes in the relationships between SNA (measured as muscle SNA) and volume regulating factors, including plasma osmolality, plasma renin activity and arginine vasopressin (AVP)...
July 21, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28733069/pulmonary-hypertension-and-clinical-correlates-in-hypertrophic-cardiomyopathy
#13
Maria Beatrice Musumeci, Vittoria Mastromarino, Matteo Casenghi, Giacomo Tini, Pietro Francia, Antonello Maruotti, Antonella Romaniello, Damiano Magrì, Rosa Lillo, Carmen Adduci, Massimo Volpe, Camillo Autore
BACKGROUND: Pulmonary hypertension (PH) in patients with hypertrophic cardiomyopathy (HCM) has been investigated in a small number of studies. Purpose of this study was to assess the prevalence and its association with outcome in a population of consecutive HCM outpatients. METHODS: We retrospectively analyzed data of 361 consecutive HCM outpatients in whom echocardiographic measurements of pulmonary artery systolic pressure (PASP) were available at initial and most recent evaluation...
July 14, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28729748/on-flare-cme-characteristics-from-sun-to-earth-combining-remote-sensing-image-data-with-in-situ-measurements-supported-by-modeling
#14
Manuela Temmer, Julia K Thalmann, Karin Dissauer, Astrid M Veronig, Johannes Tschernitz, Jürgen Hinterreiter, Luciano Rodriguez
We analyze the well-observed flare and coronal mass ejection (CME) from 1 October 2011 (SOL2011-10-01T09:18) covering the complete chain of effects - from Sun to Earth - to better understand the dynamic evolution of the CME and its embedded magnetic field. We study in detail the solar surface and atmosphere associated with the flare and CME using the Solar Dynamics Observatory (SDO) and ground-based instruments. We also track the CME signature off-limb with combined extreme ultraviolet (EUV) and white-light data from the Solar Terrestrial Relations Observatory (STEREO)...
2017: Solar Physics
https://www.readbyqxmd.com/read/28728001/modeling-the-effect-of-temperature-control-curtain-on-the-thermal-structure-in-a-deep-stratified-reservoir
#15
Wei He, Jijian Lian, Ye Yao, Mudan Wu, Chao Ma
Temperature-control curtain (TCC) is an effective facility of selective withdrawal. Previous research has estimated the influence of TCC on the outflow temperature, but its effect on the thermal structure of a reservoir area is unknown, which is crucial to the reservoir ecology. For this purpose, taking the Sanbanxi Reservoir as a case study, a 2-D hydrodynamic and temperature model covering the whole reservoir was built and calibrated to simulate the flow and temperature fields under different TCC scenarios, and the change rules of thermal stability and outflow temperature are obtained...
July 17, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28727423/seasonal-variation-of-terrigenous-pahs-along-the-marginal-seas-of-china-input-phase-partitioning-ocean-current-transport
#16
Miao-Lei Ya, Xin-Hong Wang, Yu-Ling Wu, Yong-Yu Li, Jing-Ming Yan, Chao Fang, Yan-Yan Zhao, Ran-Ran Qian, Xiao-Long Lin
To study the spatial distributions and seasonal differences of concentrations, source identification, and phase partitioning of polycyclic aromatic hydrocarbons (PAHs) in the surface water, intensive sampling was carried out along the marginal seas of China in four seasons. In the northern South China Sea (SCS), the highest PAH levels occurred in summer (July to August) and autumn (October to November). In the East China Sea (ECS) and the Yellow Sea, the highest occurred in summer (August) and winter (December)...
July 20, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28727261/more-than-meets-the-eye-the-barrier-effect-of-the-yangtze-river-outflow
#17
Gang Ni, Elizabeth Kern, Yun-Wei Dong, Qi Li, Joong-Ki Park
The Yangtze (Changjiang) River enters the East China Sea with huge annual freshwater and sediment deposits. This outflow, known as the Changjiang Diluted Water (CDW), causes striking ecological gradients that potentially shape coastal species' distribution and differentiation. The CDW has long been rendered as a marine biogeographic boundary separating cold-temperature and warm-water faunas, but it remains unclear whether and to what extent it acts as an intraspecific barrier. Here we synthesize published phylogeographic studies related to the CDW to address these issues...
July 20, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28726225/the-principle-and-effect-of-transfer-agent-for-the-removal-of-pce-during-in-situ-chemical-oxidation
#18
Yunsong Liu, Jiajun Chen, Qingwei Wang, Lanxiang Shi, Yandan Shi
Viscosity remedial technology, which uses a water-soluble polymer mixed with remedial fluids, has been introduced in recent years to improve the removal efficacy of perchloroethylene/tetrachloroethylene (PCE) by improving oxidant coverage (i.e. sweep efficiency). Xanthan gum and hydrolysed polyacrylamide (HPAM) are relatively stable with time and temperature and possess salt and oxidation resistance, indicating that they may be good flooding agents (the former is better than the latter in this work). In this work, we quantified the polymer directly improved oxidation of PCE during transport by using a two-dimensional flow tank...
July 19, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28723838/transcatheter-pulmonary-valve-implantation-valve-technology-and-procedural-outcome
#19
Arash Salavitabar, Patrick Flynn, Ralf J Holzer
PURPOSE OF REVIEW: Procedural technique and short-term outcomes of transcatheter pulmonary valve implantation (TPVI) have been widely described. The purpose of this article is to provide an update on current valve technology, and to focus on recent data surrounding TPVI in the dilated right ventricular outflow tract (RVOT), hybrid interventions, significant outcomes, and procedural costs. RECENT FINDINGS: Transcatheter valve technology has expanded with current trials evaluating self-expandable valves that can be implanted in dilated RVOTs...
July 18, 2017: Current Opinion in Cardiology
https://www.readbyqxmd.com/read/28723783/novel-surgical-management-of-cyclodialysis-cleft-via-anterior-chamber-perfusion-case-report
#20
Jinfei Tang, Ergang Du, Jie Wang
RATIONALE: Cyclodialysis cleft is a relatively rare but severe condition with persistent ocular hypotony, which can cause morphologic changes and visual loss. Here we report a case of a traumatic cyclodialysis cleft that was successfully managed with direct cyclopexy via anterior chamber perfusion. During the operation, if there is aqueous humor flowing out of the deep scleral incision, the cleft is not closed, and surgery should continue until there is no aqueous outflow. PATIENT CONCERNS: A 66-year-old man was treated for severe blunt ocular trauma of the left eye and a resultant cyclodialysis cleft, lens subluxation, choroidal detachment and a cataract...
July 2017: Medicine (Baltimore)
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