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2016 and ischemic

Nicholas Inston, Harry Schanzer, Matthias Widmer, Colin Deane, Jason Wilkins, Ingemar Davidson, Paul Gibbs, Jeurgen Zanow, Pierre Bourquelot, Domenico Valenti
Arteriovenous access ischaemic steal (AVAIS) is a serious and not infrequent complication of vascular access. Pathophysiology is key to diagnosis, investigation and management. Ischaemia distal to an AV access is due to multiple factors. Clinical steal is not simply blood diversion but pressure changes within the adapted vasculature with distal hypoperfusion and resultant poor perfusion pressures in the distal extremity. Reversal of flow within the artery distal to the AV access may be seen but this is not associated with ischaemia in most cases...
October 12, 2016: Journal of Vascular Access
Martin Grett, Martin Christ, Hans-Joachim Trappe
BACKGROUND: Little is known about the incidence and risk factors for progression to pacemaker dependency or the need for cardiac resynchronization in typical patients with an implanted defibrillator with regard to an alternative implantation of a subcutaneous ICD (S-ICD). STUDY DESIGN AND METHODS: After retrospective analysis of 291 patients with first implantation of a transvenous single chamber ICD (VVI-ICD) from 2010-2016 and excluding those with an indication for pacemaker or lack of follow-up data, 121 patients were included and investigated with regard to the following endpoints: need for pacemaker stimulation, upgrade for cardiac resynchronization (CRT), and secondary occurrence and effectiveness of antitachycardia pacing (ATP)...
October 13, 2016: Herzschrittmachertherapie & Elektrophysiologie
Gabrielle Martel, Charles-André Couture, Guillaume Gilbert, Stéphane Bancelin, Hélène Richard, Thomas Moser, Sabrina Kiss, François Légaré, Sheila Laverty
Osteochondrosis is an ischemic chondronecrosis of epiphyseal growth cartilage that results in focal failure of endochondral ossification and osteochondritis dissecans at specific sites in the epiphyses of humans and animals, including horses. The upstream events leading to the focal ischemia remain unknown. The epiphyseal growth cartilage matrix is composed of proteoglycan and collagen macromolecules and encases its vascular tree in canals. The matrix undergoes major dynamic changes in early life that could weaken it biomechanically and predispose it to focal trauma and vascular failure...
October 2016: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
Gustavo José Luvizutto, Gabriela Rizzo Soares Rizzati, Marcelo Ortolani Fogaroli, Rodrigo Thomazi Rodrigues, Priscila Watson Ribeiro, Hélio Rubens de Carvalho Nunes, Gabriel Pereira Braga, Rafael Dalle Molle da Costa, Silméia Garcia Zanati Bazan, Luiz Antônio de Lima Resende, Adriana Bastos Conforto, Rodrigo Bazan
BACKGROUND: Unilateral spatial neglect (USN) is characterized by the inability to report or respond to people or objects that are presented in the spatial hemisphere that is contralateral to the lesioned hemisphere of the brain. USN has been associated with poor functional outcomes and long stays in hospitals and rehabilitation centers. Noninvasive brain stimulation, such as transcranial direct current stimulation (tDCS), has been used in people who have been affected by USN after stroke...
October 3, 2016: Trials
Janelle Rekman, Christopher Wherrett, Sean Bennett, Miso Gostimir, Sara Saeed, Kristina Lemon, Richard Mimeault, Fady K Balaa, Guillaume Martel
BACKGROUND: Liver resection can be associated with significant blood loss and transfusion. Whole blood phlebotomy is an under-reported technique, distinct from acute normovolemic hemodilution, the goal of which is to minimize blood loss in liver operation. This work sought to report on its safety and feasibility and to describe technical considerations. METHODS: Consecutive patients who had an elective liver resection and concurrent phlebotomy between 2013 and 2016 were examined prospectively...
October 3, 2016: Surgery
Katsumi Kadekawa, Tsuyoshi Majima, Naoki Kawamorita, Hiroki Okada, Tsuyoshi Yoshizawa, Kenichi Mori, Pradeep Tyagi, Kimio Sugaya, Naoki Yoshimura
AIMS: In order to clarify whether an alpha1A/D-adrenoceptor (α1 A/D-AR) antagonist, naftopidil, or a phosphodiesterase type 5 (PDE5) inhibitor, tadalafil, prevents bladder wall remodeling after spinal cord injury (SCI), we examined the bladder and urethral activity as well as ischemic and fibrotic changes in the bladder using SCI rats with or without naftopidil or tadalafil treatment. METHODS: Adult female Sprague-Dawley rats were divided into four groups: (1) normal (spinal cord intact); (2) vehicle SCI; (3) naftopidil SCI; and (4) tadalafil SCI groups...
October 4, 2016: Neurourology and Urodynamics
Hai M Nguyen, Eva M Grössinger, Makoto Horiuchi, Kyle W Davis, Lee-Way Jin, Izumi Maezawa, Heike Wulff
Microglia are highly plastic cells that can assume different phenotypes in response to microenvironmental signals. Lipopolysaccharide (LPS) and interferon-γ (IFN-γ) promote differentiation into classically activated M1-like microglia, which produce high levels of pro-inflammatory cytokines and nitric oxide and are thought to contribute to neurological damage in ischemic stroke and Alzheimer's disease. IL-4 in contrast induces a phenotype associated with anti-inflammatory effects and tissue repair. We here investigated whether these microglia subsets vary in their K(+) channel expression by differentiating neonatal mouse microglia into M(LPS) and M(IL-4) microglia and studying their K(+) channel expression by whole-cell patch-clamp, quantitative PCR and immunohistochemistry...
October 3, 2016: Glia
Li-Xia Zhou, Su-Zhen Dong, Ming-Feng Zhang
PURPOSE: To present three fetal vein of Galen aneurysmal malformations (VGAMs), which were diagnosed through magnetic resonance imaging (MRI), and highlight these cardiovascular findings. MATERIALS AND METHODS: We retrospectively reviewed three fetuses with VGAM at 31, 32, and 33 weeks of gestation. Feeding arteries and draining veins were observed by MRI. Secondary changes in the brain and high-output heart failure caused by high blood flow in the lesion were evaluated...
September 30, 2016: Journal of Magnetic Resonance Imaging: JMRI
Heyang Wang, Yi Li, Hongliang Cong, Shifang Ding, Bin Liu, Lu Li, Yundai Chen, Shaobin Jia, Quanmin Jing, Xin Zhao, Haiwei Liu, Zhenyang Liang, Jing Li, Dan Bao, Yaling Han
OBJECTIVES: To explore the efficiency and safety of bivalirudin in patients undergoing emergency percutaneous coronary intervention via radial access. BACKGROUND: Bivalirudin reduces bleeding risks over heparin in patients undergoing PCI. However, bleeding advantages of bivalirudin in patients undergoing transradial intervention is uncertain. METHODS: In the BRIGHT trial, 1,723 patients underwent emergency PCI via radial access, with 576 patients in the bivalirudin arm, 576 in the heparin arm and 571 in the heparin plus tirofiban arm...
September 28, 2016: Catheterization and Cardiovascular Interventions
Kevin Phan, Joshua M Haswell, Joshua Xu, Yusuf Assem, Stephanie L Mick, Samir R Kapadia, Anson Cheung, Frederick S Ling, Tristan D Yan, Vakhtang Tchantchaleishvili
De novo progressive aortic insufficiency (AI) is a side effect frequently related to prolonged support with continuous-flow left ventricular assist devices (CF-LVAD). Its progression can result in recurrent clinical heart failure symptoms and significantly increased mortality. Recently, percutaneous intervention methods such as transcatheter aortic valve replacement (TAVR) and percutaneous occluder devices have emerged, However, given the very scarce global experience with these approaches, evidence in the literature is lacking...
September 22, 2016: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
Tiffany D Stafford, Joseph L Hagan, Curtis G Sitler, Caraciolo J Fernandes, Jeffrey R Kaiser
Perinatal hypoxic ischemic encephalopathy (HIE) can lead to severe neurodevelopmental outcome and death. Therapeutic hypothermia is neuroprotective for infants with moderate-to-severe HIE. However, therapeutic hypothermia is only offered at high-level regional neonatal intensive care units (NICUs), necessitating the need to transport sick infants to referral centers. The goal of this study was to evaluate whether active cooling on transport is more effective than passive cooling in achieving temperatures in the treatment target range (33°C-34°C) on arrival to the Texas Children's Hospital (TCH) NICU...
September 27, 2016: Therapeutic Hypothermia and Temperature Management
Jeffrey L Saver, Mayank Goyal, Aad van der Lugt, Bijoy K Menon, Charles B L M Majoie, Diederik W Dippel, Bruce C Campbell, Raul G Nogueira, Andrew M Demchuk, Alejandro Tomasello, Pere Cardona, Thomas G Devlin, Donald F Frei, Richard du Mesnil de Rochemont, Olvert A Berkhemer, Tudor G Jovin, Adnan H Siddiqui, Wim H van Zwam, Stephen M Davis, Carlos Castaño, Biggya L Sapkota, Puck S Fransen, Carlos Molina, Robert J van Oostenbrugge, Ángel Chamorro, Hester Lingsma, Frank L Silver, Geoffrey A Donnan, Ashfaq Shuaib, Scott Brown, Bruce Stouch, Peter J Mitchell, Antoni Davalos, Yvo B W E M Roos, Michael D Hill
IMPORTANCE: Endovascular thrombectomy with second-generation devices is beneficial for patients with ischemic stroke due to intracranial large-vessel occlusions. Delineation of the association of treatment time with outcomes would help to guide implementation. OBJECTIVE: To characterize the period in which endovascular thrombectomy is associated with benefit, and the extent to which treatment delay is related to functional outcomes, mortality, and symptomatic intracranial hemorrhage...
September 27, 2016: JAMA: the Journal of the American Medical Association
Bradley A Gross, Karam Moon, Andrew F Ducruet, Felipe C Albuquerque
BACKGROUND/OBJECTIVE: The rarity of petrous internal carotid artery (ICA) aneurysms has largely precluded analyses of their presentation and management in case series format. METHODS: We performed a retrospective analysis of our endovascular database of patients treated from January 2001 to May 2016 to identify patients with petrous ICA aneurysms. We evaluated the treatment approach and results for patients managed in the era of dedicated intracranial stents and flow diverters, noting clinical and angiographic results...
September 26, 2016: Journal of Neurointerventional Surgery
Peng Jiang, Wenbin Deng
Astrocytes traditionally were thought to have merely a support function, but are now understood to be important regulators of neural development and function. The immature and mature astrocytes have stage-specific roles in neuronal development. However, it is largely unclear whether human astrocytes also serve stage-specific roles in oligodendroglial development. Owing to the broad and diverse roles of astroglia in the central nervous system, transplantation of astroglia also could be of therapeutic value in promoting regeneration after CNS injury or disease...
2016: Neurogenesis (Austin, Tex.)
Timothy R Betts, Milena Leo, Sandeep Panikker, Prapa Kanagaratnam, Michael Koa-Wing, David Wyn Davies, David Hildick-Smith, Dylan G Wynne, Oliver Ormerod, Oliver R Segal, Anthony W Chow, Derick Todd, Sandra Cabrera Gomez, Graeme J Kirkwood, David Fox, Chris Pepper, John Foran, Tom Wong
OBJECTIVES: This study aimed at assessing the feasibility and long-term efficacy of left atrial appendage occlusion (LAAO) in a "real world" setting. BACKGROUND: Although LAAO has recently emerged as an alternative to oral anticoagulants in patients with atrial fibrillation for the prevention of thromboembolic stroke, "real world" data about the procedure with different devices are lacking. METHODS: Eight centers in the United Kingdom contributed to a retrospective registry for LAAO procedures undertaken between July 2009 and November 2014...
September 21, 2016: Catheterization and Cardiovascular Interventions
Jaya Chandrasekhar, Sameer Bansilal, Usman Baber, Samantha Sartori, Melissa Aquino, Serdar Farhan, Birgit Vogel, Michela Faggioni, Gennaro Giustino, Cono Ariti, Antonio Colombo, Alaide Chieffo, Annapoorna Kini, Richard Saporito, C Michael Gibson, Bernhard Witzenbichler, David Cohen, David Moliterno, Thomas Stuckey, Timothy Henry, Stuart Pocock, George Dangas, P Gabriel Steg, Roxana Mehran
BACKGROUND: Proton pump inhibitors (PPI) may decrease the availability of clopidogrel by competitive antagonism, leading to a potential increase in ischemic events. METHODS: We evaluated patients from the all-comer PARIS registry treated with dual antiplatelet therapy (DAPT) with aspirin and clopidogrel following coronary stenting for outcomes stratified by PPI use. Two-year major adverse cardiovascular events (MACE), composite of cardiac death, myocardial infarction, definite or probable stent thrombosis or target lesion revascularization (TLR), and net adverse cardiac events (NACE), composite of MACE or Bleeding Academic Research consortium (BARC) type 3 or 5 bleeding were assessed...
September 21, 2016: Catheterization and Cardiovascular Interventions
Toshihiko Sawada, Katsuhiko Inoue, Dairou Tanabe, Shunji Kawamoto, Tatsuya Tsuji, Seiki Tashiro
Purposes; FK506 (strong immunosuppressive agent) was investigated experimentally whether to protect the hepatic IRI. Methods; Warm ischemic experiment using pigs and rats were performed and examined whether FK506 is effective. Results; The results obtained are as follows. 1. Warm ischemia allowed time of the pigs without FK506 was 150 minutes, but as for that of FK506 group, the extension of 30 minutes was got in 180 minutes. 2. Biliary excretion rate of BSP after reperfusion were better in the group of 180 minutes ischemia with FK506 than in without FK506 group...
2016: Journal of Medical Investigation: JMI
Craig Anderson, Doug McEvoy, Jiguang Wang
OBJECTIVE: There is uncertainty over whether treatment of obstructive sleep apnea (OSA) can prevent serious cardiovascular (CV) events. DESIGN AND METHOD: SAVE (NCT00738179; ACTRN12608000409370) was designed to determine whether treatment of OSA with CPAP reduces the risk of serious CV events in patients with established CV disease. Participants were centrally randomised to CPAP treatment or usual care between 2008 and 2013,with follow-up completed late 2015 and the results will be announced in August 2016...
September 2016: Journal of Hypertension
S T Garrity, M Pistilli, M S Vaphiades, N Q Richards, P S Subramanian, P R Rosa, B L Lam, B J Osborne, G T Liu, K E Duncan, R K Shin, N J Volpe, K S Shindler, M S Lee, M L Moster, E H Tracey, S E Cuprill-Nilson, M A Tamhankar
PurposeTo determine the differences in the presentation of ophthalmic giant cell arteritis between African-Americans and Caucasians.MethodsThis was a multicenter retrospective case series comparing African-American patients with ophthalmic GCA to a previously published Caucasian cohort. Neuro-ophthalmic centers across the United States were contacted to provide data on African-American patients with biopsy-proven ophthalmic giant cell arteritis. The differences between African-American and Caucasian patients with respect to multiple variables, including age, sex, systemic and ophthalmic signs and symptoms, ocular ischemic lesions, and laboratory results were studied...
September 16, 2016: Eye
Michael V Berridge, Remy T Schneider, Melanie J McConnell
Intercellular mitochondrial transfer has been shown in tumor models, following lung injury and in xenotransplants of leukemic cells, but trafficking between cells in the brain remains unexplored. A suggestion that mitochondria move from astrocytes to neurons in a model of ischemia in a recent article in Nature by Hayakawa et al. (2016) should be interpreted with caution.
September 13, 2016: Cell Metabolism
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