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Aline S Martinez, Eduardo V Queiroz, Mitch Bryson, Maria Byrne, Ross A Coleman
Understanding site fidelity is important in animal ecology, but evidence is lacking that this behaviour is due to an animal choosing a specific location. To discern site selection behaviour, it is necessary to consider the spatial distribution of habitats that animals can occupy within a landscape. Tracking animals and defining clear habitat boundaries, however, is often difficult. We use in situ habitat distribution data and animal movement simulations to investigate behavioural choice in site fidelity patterns...
July 2017: Journal of Animal Ecology
Elizabeth Wright, Michel Fischbach, Ariane Zaloszyc, Fabio Paglialonga, Christoph Aufricht, Stephanie Dufek, Sevcan Bakkaloğlu, Günter Klaus, Aleksandra Zurowska, Mesiha Ekim, Gema Ariceta, Tuula Holtta, Augustina Jankauskiene, Claus Peter Schmitt, Constantinos J Stefanidis, Johan Vande Walle, Karel Vondrak, Alberto Edefonti, Rukshana Shroff
BACKGROUND: Hemodialysis (HD) in children with a concomitant ventriculoperitoneal shunt (VPS) is rare. Registry data suggest that peritoneal dialysis with a VPS is safe, but little is known about HD in the presence of a VPS. METHODS: We performed a 10-year survey to determine the prevalence of a VPS, complications and outcome in children with a VPS on HD in 15 dialysis units from the 13 countries participating in the European Pediatric Dialysis Working Group. RESULTS: Eleven cases of HD with a VPS were reported (prevalence 1...
January 2016: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
Igor E Konstantinov, Koichi Sughimoto, Christian Pierre Brizard, Yves d'Udekem
Atrioventricular valve regurgitation is one of the predictors of adverse outcomes after the Fontan procedure. We describe our surgical technique of GoreTex (W. L. Gore & Associates, Inc., Flagstaff, AZ, USA) bridge to repair a common atrioventricular valve in single-ventricular circulation. The repair includes a GoreTex strip that is secured to the mid-line of both superior and inferior bridging leaflets and annulus to obtain a better coaptation of the leaflets and prevent further dilatation of the annulus...
2015: Multimedia Manual of Cardiothoracic Surgery: MMCTS
Theodore H Yuo, Rabih A Chaer, Ellen D Dillavou, Steven A Leers, Michel S Makaroun
OBJECTIVE: Current guidelines suggest that arteriovenous fistula (AVF) is associated with survival advantage over arteriovenous graft (AVG). However, AVFs often require months to become functional, increasing tunneled dialysis catheter (TDC) use, which can erode the benefit of an AVF. We sought to compare survival in patients with end-stage renal disease after creation of an AVF or AVG in patients starting hemodialysis (HD) with a TDC and to identify patient populations that may benefit from preferential use of AVG over AVF...
December 2015: Journal of Vascular Surgery
Radek Pudil, Martina Vasatova, Petr Parizek, Ludek Haman, Lucie Horakova, Vladimir Palicka
BACKGROUND: Activation of the immune system plays a pathogenic role in the process of myocardial remodeling in patients with supraventricular arrhythmias. The intensity of this process is associated with the effectiveness of electrical cardioversion and radiofrequency catheter ablation (RFA). The aim of this study was to test the ability of the biochip microarray to detect immune parameters in patients with supraventricular arrhythmias undergoing RFA treatment. METHODS: We used a biochip-based microarray system to determine multiple immune parameters in a group of 35 patients who had undergone RFA for atrioventricular nodal reentry tachycardia (AVNRT), atrial flutter (AFL) and atrial fibrillation (AF)...
March 2016: Biomedical Papers of the Medical Faculty of the University Palacký, Olomouc, Czechoslovakia
Nirvana Sadaghianloo, Elixène Jean-Baptiste, Khalid Rajhi, Etienne François, Serge Declemy, Alan Dardik, Réda Hassen-Khodja
OBJECTIVE: Although radial-cephalic (RC) and brachial-cephalic (BC) fistulas are the recommended primary accesses for hemodialysis, access failure is frequently due to juxta-anastomotic stenosis (JAS). Because increased turbulence at the anastomosis may lead to JAS, we hypothesized that an acute angle at the arteriovenous anastomosis is associated with JAS, reduced fistula patency, and increased reinterventions. METHODS: Between February 2013 and September 2014, the anastomotic angle and vessel diameters were prospectively collected for all patients who underwent RC or BC fistula creation...
December 2015: Journal of Vascular Surgery
Daniela Laux, Lucile Houyel, Fanny Bajolle, Francesca Raimondi, Younes Boudjemline, Damien Bonnet
BACKGROUND: Discordant atrioventricular with concordant ventriculo-arterial connections is a rare cardiac defect. When isolated, the haemodynamics resemble transposition of the great arteries. In complex heart defects such as heterotaxy, haemodynamics guide the surgical approach. OBJECTIVE: To report a series of eight patients with discordant atrioventricular and concordant ventriculo-arterial connections focussing on anatomical and diagnostic difficulties, surgical management, and follow-up...
January 2016: Cardiology in the Young
Dandan Yang, Tingzhong Wang, Yajuan Ni, Bingxue Song, Feifei Ning, Peijing Hu, Ling Luo, Ya Wang, Aiqun Ma
Recent studies have shown that the sensitivity of apamin-sensitive K(+) current (I KAS, mediated by apamin-sensitive small conductance calcium-activated potassium channels subunits) to intracellular Ca(2+) is increased in heart failure (HF), leading to I KAS upregulation, action potential duration shortening, early after depolarization, and recurrent spontaneous ventricular fibrillation. We hypothesized that casein kinase 2 (CK2) interacted with small conductance calcium-activated potassium channels (SK) is decreased in HF, and protein phosphatase 2A (PP2A) is increased on the opposite, upregulating the sensitivity of I KAS to intracellular Ca(2+) in HF...
December 2015: Journal of Membrane Biology
Frédéric Clarençon, Franck Maizeroi-Eugène, Flavien Maingreaud, Damien Bresson, David Ayoub, Nader-Antoine Sourour, Nicolas Menjot de Champfleur, Jacques Chiras, Catherine Yardin, Charbel Mounayer
INTRODUCTION: Convex spherical anamorphosis is a barrel distortion that consists of the application of a plane surface on a convex hemisphere. Applied in vascular imaging of brain arteriovenous malformations (bAVMs), this deformation may help to 'spread' the nidus and surrounding vessels (arteries/veins) and thus to differentiate the different components of bAVMs more accurately. METHODS: The imaging data from 15 patients (8 male, 7 female; 14 supratentorial bAVMs, 1 infratentorial) were used to test the algorithm...
September 2016: Journal of Neurointerventional Surgery
Hiroshi Ohira, David H Birnie, Elena Pena, Jordan Bernick, Brian Mc Ardle, Eugene Leung, George A Wells, Keiichiro Yoshinaga, Ichizo Tsujino, Takahiro Sato, Osamu Manabe, Noriko Oyama-Manabe, Masaharu Nishimura, Nagara Tamaki, Alexander Dick, Carole Dennie, Ran Klein, Jennifer Renaud, Robert A deKemp, Terrence D Ruddy, Benjamin J W Chow, Ross Davies, Renee Hessian, Peter Liu, Rob S B Beanlands, Pablo B Nery
PURPOSE: Cardiac sarcoidosis (CS) is a cause of conduction system disease (CSD). (18)F-Fluorodeoxyglucose-positron emission tomography (FDG PET) and cardiac magnetic resonance (CMR) are used for detection of CS. The relative diagnostic value of these has not been well studied. The aim was to compare these imaging modalities in this population. METHODS: We recruited steroid-naive patients with newly diagnosed CSD due to CS. All CS patients underwent both imaging studies within 12 weeks of each other...
February 2016: European Journal of Nuclear Medicine and Molecular Imaging
Hung-Chih Chen, Hao-Sheng Chang
PURPOSE: Several investigators have found that preserving the superior thyroid artery flap can considerably increase the survival rate of the sternocleidomastoid (SCM) flap. Nevertheless, they have recommended not cleaning the lymph nodes above level II for occipital artery preservation, which can leave risky metastatic lymph nodes and restrict the application of the SCM flap in patients with at least stage N1. The authors propose that preserving only the superior thyroid arteriovenous system is sufficient to ensure survival of the SCM flap and preserving the occipital artery is not necessary...
December 2015: Journal of Oral and Maxillofacial Surgery
Tomas Chytka, Roman Liscak, Petra Kozubiková, Josef Vymazal
BACKGROUND/OBJECTIVES: The treatment of large arteriovenous malformations (AVMs) presents a challenge and the effectiveness of radiosurgery decreases with increasing treatment volume. Here, we analyzed and compared single-session treatment for AVMs >15 cm3 with staged treatment, when the volume of a large AVM was divided into 2 or more compartments, which were subsequently treated at intervals of a few months. In the event that complete obliteration was not achieved within 3 years, repeat radiosurgery was considered...
2015: Stereotactic and Functional Neurosurgery
Sachiko Hirotani, Kotaro Kai, Kazuhiro Iwatoh, Akihito Sannomiya, Ichiro Nakajima, Shohei Fuchinoue
METHODS: We conducted an analysis on 11 cases of death after AVG infection that occurred between 1996 and 2013, and compared their information with those of 23 cases of generalized infection due to arteriovenous graft (AVG) infection during the same period who survived. RESULTS: The cause of death was sepsis in all 11 patients. The initial C-reactive protein (CRP) was 10.2-39.8 (28 in average) and the duration from onset of fever to vascular access (VA) hemostasis/removal procedure was 6-9 days (6...
November 2015: Journal of Vascular Access
Julien Al Shakarchi, Damian McGrogan, Philip J Yates, Nicholas Inston
PURPOSE: Infective complications of patients requiring insertion of arteriovenous grafts for hemodialysis remain a challenge. In particular, patients who have exhausted autologous options and have had recent infective complications relating to alternative dialysis modalities such as peritonitis or central venous catheter-associated bacteremia can pose a significant dilemma. We present a series of challenging cases that represent examples of the use of biosynthetic grafts in patients with on-going infective risks...
March 2016: Journal of Vascular Access
Vincenza Granata, Elisabetta de Lutio di Castelguidone, Roberta Fusco, Orlando Catalano, Mauro Piccirillo, Raffaele Palaia, Francesco Izzo, Adolfo D'Errico Gallipoli, Antonella Petrillo
OBJECTIVE: Irreversible electroporation (IRE) is a new ablation modality. Our purpose was to describe the effectiveness and the safety of the treatment and to evaluate the magnetic resonance imaging (MRI), computed tomography (CT) and contrast-enhanced ultrasound (CEUS) diagnostic accuracy in HCC patients treated with IRE at 1-, 3-, and 6-month follow-up. MATERIALS AND METHODS: In an 18-month period, we treated 24 HCC lesions in 20 patients unfit for surgery. MRI, CT and CEUS were performed before and one, 3 and 6 month after IRE...
February 2016: La Radiologia Medica
Ilias Iliopoulos, Ricardo G Branco, Nadine Brinkhuis, Anke Furck, Joan LaRovere, David S Cooper, Nazima Pathan
We hypothesised that lower mesenteric near-infrared spectroscopy values would be associated with a greater incidence of gastrointestinal complications in children weighing <10 kg who were recovering from cardiac surgery. We evaluated mesenteric near-infrared spectroscopy, central venous oxygen saturation, and arterial blood gases for 48 hours post-operatively. Enteral feeding intake, gastrointestinal complications, and markers of organ dysfunction were monitored for 7 days. A total of 50 children, with median age of 16...
April 2016: Cardiology in the Young
Antonio Nicolato, Michele Longhi, Nicola Tommasi, Giuseppe Kenneth Ricciardi, Roberto Spinelli, Roberto Israel Foroni, Emanuele Zivelonghi, Simone Zironi, Stefano Dall'Oglio, Alberto Beltramello, Mario Meglio
OBJECT: The goal of this study was to evaluate advantages, risks, and failures of Gamma Knife radiosurgery (GKRS) in a large series of pediatric and adolescent patients with cerebral arteriovenous malformations (cAVMs) who were followed up for at least 36 months. METHODS: Since February 1993, 100 pediatric and adolescent patients (≤ 18 years of age) with cAVMs have undergone GKRS at the authors' institution and were followed up for at least 36 months. Forty-six patients were boys and 54 were girls; the mean age was 12...
December 2015: Journal of Neurosurgery. Pediatrics
Muammar M Kabir, Elyar Ghafoori, Larisa G Tereshchenko
The purposes of this study were to characterize and quantify concordance between consecutive atrial and ventricular activation time points through analysis of phases and to explore its association with outcomes in patients with implantable cardioverter-defibrillator (ICD). Patients with structural heart disease and dual-chamber ICDs underwent 5min baseline right ventricular (V) near-field and atrial (A) electrogram (EGM) recording. The cross-dependencies of phase dynamics of the changes in consecutive A (AA') and V (VV') were quantified and the AV phase dependency index was determined...
November 2015: Journal of Electrocardiology
Patrick C Thompson, Brant W Ullery, Dominik Fleischmann, Venita Chandra
We describe a case of a 55-year-old male with a remote history of a gunshot wound to the left thigh who presented with a 1-year history of worsening high-output congestive heart failure, left lower extremity edema, and left lower abdominal discomfort. Diagnostic evaluation included a computed tomographic angiography (CTA) that demonstrated a fistulous communication between the left superficial femoral artery (SFA) and vein (SFV) as well as a 7.2-cm external iliac vein aneurysm. Given his symptomatology, an endovascular repair of his AVF was recommended, followed by antithrombotic therapy for his aneurysm...
July 2015: Vascular and Endovascular Surgery
Matthias Grothoff, Meinhard Mende, Daniel Graefe, Ingo Daehnert, Martin Kostelka, Janine Hoffmann, Patrick Freyhardt, Lukas Lehmkuhl, Matthias Gutberlet, Anne Mahler
INTRODUCTION: Dilatation of the ascending aorta is a common finding in Tetralogy of fallot (TOF). We sought to provide aortic dimensions in children and adolescents after corrected TOF obtained by contrast-enhanced cardiac-magnetic-resonance angiography (CE-CMRA) that could serve as reference values. MATERIALS AND METHODS: We enrolled 101 children and adolescents (56 male) with a median age of 10.9 years. All patients underwent CE-CMRA imaging using a 3-dimensional spoiled gradient-echo-sequence...
March 2016: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
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