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https://www.readbyqxmd.com/read/28339860/outcomes-with-single-coil-versus-dual-coil-implantable-cardioverter-defibrillators-a-meta-analysis
#1
Nicholas Sunderland, Amit Kaura, Francis Murgatroyd, Para Dhillon, Paul A Scott
Aims: Dual-coil implantable cardioverter defibrillator (ICD) leads have traditionally been used over single-coil leads due to concerns regarding high defibrillation thresholds (DFT) and consequent poor shock efficacy. However, accumulating evidence suggests that this position may be unfounded and that dual-coil leads may also be associated with higher complication rates during lead extraction. This meta-analysis collates data comparing dual- and single-coil ICD leads. Methods and results: Electronic databases were systematically searched for randomized controlled trials (RCT) and non-randomized studies comparing single-coil and dual-coil leads...
February 27, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28339758/safety-and-efficacy-of-the-new-bidirectional-rotational-evolution%C3%A2-mechanical-lead-extraction-sheath-results-from-a-multicentre-italian-registry
#2
Patrizio Mazzone, Federico Migliore, Emanuele Bertaglia, Domenico Facchin, Elisabetta Daleffe, Vittorio Calzolari, Martino Crosato, Francesco Melillo, Francesco Peruzza, Alessandra Marzi, Nicoleta Sora, Paolo Della Bella
Aims: The aim of this prospective multicentre study is to evaluate safety and efficacy of the new bidirectional rotational mechanical lead extraction (LE) sheath (Evolution RL, Cook Medical, USA) in chronically implanted leads (>1-year-old leads). Methods and results: Between September 2013 and June 2016, a total of 238 leads in 124 consecutive patients were removed by using the new Evolution RL rotational mechanical sheath. Indications for LE were cardiac device infection in 63 (50...
February 23, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28328859/single-stage-nonintubated-uniportal-thoracoscopic-resection-of-synchronous-bilateral-pulmonary-nodules-after-coil-labeling-a-case-report-and-literature-review
#3
Miao Zhang, Tao Wang, You-Wei Zhang, Wen-Bin Wu, Heng Wang, Rong-Hua Xu
RATIONALE: Preoperative localization of small pulmonary nodules is essential for precise resection, besides, the optimal treatment for pulmonary nodules is controversial and the prognosis without surgery is uncertain. PATIENT CONCERNS: Herein we present a patient with compromised pulmonary function harboring synchronous triple ground-glass nodules located separately in different pulmonary lobes. DIAGNOSES: The pathological diagnosis of the nodules were chronic inflammation, inflammatory pseudotumor and atypical adenomatous hyperplasia, respectively...
March 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28303639/covered-stent-implantation-through-a-single-8-french-guide-catheter-for-the-management-of-a-distal-coronary-perforation
#4
Yader Sandoval, Angie S Lobo, Emmanouil S Brilakis
Distal coronary perforation can cause early or late tamponade and is usually treated with fat or coil embolization. An alternative treatment strategy is occlusion of the ostium of the perforated vessel via implantation of a covered stent in the main vessel, which is typically achieved using the ping-pong guide catheter technique. In this technique, a balloon is inflated over one guide catheter to stop pericardial bleeding and a covered stent is delivered through a second guide catheter due to inability to fit both a balloon and a covered stent through a single guide catheter...
March 17, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28296979/feasibility-of-assessing-bone-matrix-and-mineral-properties-in-vivo-by-combined-solid-state-1h-and-31p-mri
#5
Xia Zhao, Hee Kwon Song, Alan C Seifert, Cheng Li, Felix W Wehrli
PURPOSE: To develop and evaluate an integrated imaging protocol for bone water and phosphorus quantification in vivo by solid-state 1H and 31P MRI. MATERIALS AND METHODS: All studies were HIPAA-compliant and were performed with institutional review board approval and written informed consent. Proton (1H) ultra-short echo-time (UTE) and phosphorus (31P) zero echo-time (ZTE) sequences were designed and implemented on a 3 T clinical MR scanner to quantify bone water and mineral in vivo...
2017: PloS One
https://www.readbyqxmd.com/read/28291025/evaluation-of-reproducibility-of-diffusion-tensor-imaging-in-the-brachial-plexus-at-3-0-t
#6
Michael J Ho, Andrei Manoliu, Felix Pierre Kuhn, Bram Stieltjes, Markus Klarhöfer, Thorsten Feiweier, Magda Marcon, Gustav Andreisek
OBJECTIVE: The aim of this study was to evaluate the reproducibility of 3 T magnetic resonance imaging diffusion tensor imaging (DTI) of the brachial plexus in healthy subjects. METHODS: Ten healthy volunteers were included, and morphological and DTI sequences of the nerve roots of the brachial plexus from C5 to T1 of both sides were repeatedly acquired on a 3 T magnetic resonance system (MAGNETOM Skyra; Siemens Healthcare, Erlangen, Germany). A prototype diffusion-weighted single-shot echo-planar imaging sequence-enabling slice-specific shim adjustments was performed with b-values of 0 and 800 s/mm in 30 gradient directions, resulting in an acquisition time of about 6 minutes each in axial orientation...
March 13, 2017: Investigative Radiology
https://www.readbyqxmd.com/read/28289210/phosphorylation-induced-conformational-dynamics-in-an-intrinsically-disordered-protein-and-potential-role-in-phenotypic-heterogeneity
#7
Prakash Kulkarni, Mohit Kumar Jolly, Dongya Jia, Steven M Mooney, Ajay Bhargava, Luciane T Kagohara, Yihong Chen, Pengyu Hao, Yanan He, Robert W Veltri, Alexander Grishaev, Keith Weninger, Herbert Levine, John Orban
Intrinsically disordered proteins (IDPs) that lack a unique 3D structure and comprise a large fraction of the human proteome play important roles in numerous cellular functions. Prostate-Associated Gene 4 (PAGE4) is an IDP that acts as a potentiator of the Activator Protein-1 (AP-1) transcription factor. Homeodomain-Interacting Protein Kinase 1 (HIPK1) phosphorylates PAGE4 at S9 and T51, but only T51 is critical for its activity. Here, we identify a second kinase, CDC-Like Kinase 2 (CLK2), which acts on PAGE4 and hyperphosphorylates it at multiple S/T residues, including S9 and T51...
March 13, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28286187/hybrid-evar-preservation-of-pelvic-perfusion-with-external-to-internal-iliac-artery-bypass
#8
Neel A Mansukhani, George E Havelka, Irene B Helenowski, Heron E Rodriguez, Andrew W Hoel, Mark K Eskandari
INTRODUCTION: Diminished pelvic arterial flow as a result of intentional coverage/embolization of internal iliac arteries (IIA) during isolated endovascular common iliac artery aneurysm (CIAA) repair or endovascular repair of abdominal aortic aneurysms (EVAR) may result in symptomatic pelvic ischemia. While generally well tolerated, in severe cases pelvic ischemia may manifest as recalcitrant buttock claudication, vasculogenic impotence, or perineal, vesicle, rectal, and/or spinal cord ischemia...
March 7, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28283364/absolute-ethanol-embolisation-of-mandibular-arteriovenous-malformations-following-direct-percutaneous-puncture-and-release-of-coils-via-a-microcatheter
#9
D Wang, L Su, Y Han, Z Wang, L Zheng, X Fan
OBJECTIVE/BACKGROUND: To evaluate the safety, efficacy, and medium-term outcome of a modified technique of ethanol embolisation of mandibular arteriovenous malformations (AVMs) following a direct percutaneous transvenous approach to the release of coils via a microcatheter. METHODS: From January 2012 to July 2014, 18 consecutive patients (mean age 20.9 years [range 10-35 years]) with symptomatic AVMs of the mandible were enrolled. A microcatheter was inserted into the lesion via a direct percutaneous puncture needle...
March 7, 2017: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/28275762/the-dynamics-of-solvation-dictates-the-conformation-of-polyethylene-oxide-in-aqueous-isobutyric-acid-and-binary-solutions
#10
Udaya R Dahal, Elena E Dormidontova
Polymers hydrogen-bonding with solvent represent an important broad class of polymers, properties of which depend on solvation. Using atomistic molecular dynamics simulations with the OPLS/AA force field we investigate the effect of hydrogen bonding on PEO conformation and chain mobility by comparing its behavior in isobutyric acid and aqueous solutions. In agreement with experimental data, we found that in isobutyric acid PEO forms a rather rigid extended helical structure, while in water it assumes a highly flexible coil conformation...
March 9, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28272792/non-water-suppressed-short-echo-time-magnetic-resonance-spectroscopic-imaging-using-a-concentric-ring-k-space-trajectory
#11
Uzay E Emir, Brian Burns, Mark Chiew, Peter Jezzard, M Albert Thomas
Water-suppressed MRS acquisition techniques have been the standard MRS approach used in research and for clinical scanning to date. The acquisition of a non-water-suppressed MRS spectrum is used for artefact correction, reconstruction of phased-array coil data and metabolite quantification. Here, a two-scan metabolite-cycling magnetic resonance spectroscopic imaging (MRSI) scheme that does not use water suppression is demonstrated and evaluated. Specifically, the feasibility of acquiring and quantifying short-echo (TE  = 14 ms), two-dimensional stimulated echo acquisition mode (STEAM) MRSI spectra in the motor cortex is demonstrated on a 3 T MRI system...
March 8, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/28272320/the-novel-design-of-a-single-sided-mri-probe-for-assessing-burn-depth
#12
Zhonghua He, Wei He, Jiamin Wu, Zheng Xu
Burn depth assessment in clinics is still inaccurate because of the lack of feasible and practical testing devices and methods. Therefore, this process often depends on subjective judgment of burn surgeons. In this study, a new unilateral magnetic resonance imaging (UMRI) sensor equipped with a 2D gradient coil system was established, and we attempted to assess burns using unilateral nuclear magnetic resonance devices. A reduced Halbach magnet was utilized to generate a magnetic field that was relatively homogeneous on a target plane with a suitable field of view for 2D spatial localization...
March 6, 2017: Sensors
https://www.readbyqxmd.com/read/28269681/a-three-element-1h-31p-dual-tuned-array-for-magnetic-resonance-spectroscopy-at-4-7-t
#13
Matthew D Wilcox, Romina Del Bosque, Kurt Parizek, Jeremy Sia, Edwin D Eigenbrodt, Mary P McDougall
This work describes the construction and testing of a three-element, double-tuned receive array and transmit coils for 31P-1H spectroscopy and imaging. The receive coils were geometrically-decoupled, single-loop surface coils and the transmit coils were concentric saddle coils. The coils were used to examine a physiologically-modeled CNC-milled phantom. The receive coil array was able to improve SNR while also providing gross localization of the 1H and 31P signals.
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269276/toward-a-distributed-free-floating-wireless-implantable-neural-recording-system
#14
Pyungwoo Yeon, Xingyuan Tong, Byunghun Lee, Abdollah Mirbozorgi, Bruce Ash, Helmut Eckhardt, Maysam Ghovanloo
To understand the complex correlations between neural networks across different regions in the brain and their functions at high spatiotemporal resolution, a tool is needed for obtaining long-term single unit activity (SUA) across the entire brain area. The concept and preliminary design of a distributed free-floating wireless implantable neural recording (FF-WINeR) system are presented, which can enabling SUA acquisition by dispersedly implanting tens to hundreds of untethered 1 mm3 neural recording probes, floating with the brain and operating wirelessly across the cortical surface...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269024/fusion-of-inertial-and-magnetic-sensors-for-3d-position-and-orientation-estimation
#15
P Tadayon, T Felderhoff, A Knopp, G Staude
This paper presents a new method for 3D position and orientation estimation based on the magnetic field generated by a single coil and the fusion of low power magnetometers and inertial sensors. The fixed spatial relationship between the sensors is exploited to solve the ambiguity problem that occurs when only a single coil is employed. In this context a new positioning algorithm is developed and verified by simulations. Using a single coil instead of three coils as common in conventional magnetic field based systems brings a benefit both regarding power consumption and construction size...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268716/optimal-wireless-receiver-structure-for-omnidirectional-inductive-power-transmission-to-biomedical-implants
#16
Hesam Sadeghi Gougheri, Mehdi Kiani
In order to achieve omnidirectional inductive power transmission to biomedical implants, the use of several orthogonal coils in the receiver side (Rx) has been proposed in the past. In this paper, the optimal Rx structure for connecting three orthogonal Rx coils and the power management is found to achieve the maximum power delivered to the load (PDL) in the presence of any Rx coil tilting. Unlike previous works, in which a separate power management has been used for each coil to deliver power to the load, different resonant Rx structures for connecting three Rx coils to a single power management are studied...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268180/emat-phased-array-a-feasibility-study-of-surface-crack-detection
#17
J Isla, F Cegla
Electromagnetic-acoustic transducers (EMATs) consist of a magnet and a coil. They are advantageous in some non-destructive evaluation (NDE) applications because no direct contact with the specimen is needed to send and receive ultrasonic waves. However, EMATs commonly require excitation peak powers greater than 1kW and therefore the driving electronics and the EMAT coils have to be bulky. This has hindered the development of EMAT phased arrays with characteristics similar to those of conventional piezoelectric phased arrays...
February 14, 2017: Ultrasonics
https://www.readbyqxmd.com/read/28261904/high-resolution-in-vivo-diffusion-imaging-of-the-human-brain-with-generalized-slice-dithered-enhanced-resolution-simultaneous-multislice-gslider-sms
#18
Kawin Setsompop, Qiuyun Fan, Jason Stockmann, Berkin Bilgic, Susie Huang, Stephen F Cauley, Aapo Nummenmaa, Fuyixue Wang, Yogesh Rathi, Thomas Witzel, Lawrence L Wald
PURPOSE: To develop an efficient acquisition for high-resolution diffusion imaging and allow in vivo whole-brain acquisitions at 600- to 700-μm isotropic resolution. METHODS: We combine blipped-controlled aliasing in parallel imaging simultaneous multislice (SMS) with a novel slab radiofrequency (RF) encoding gSlider (generalized slice-dithered enhanced resolution) to form a signal-to-noise ratio-efficient volumetric simultaneous multislab acquisition. Here, multiple thin slabs are acquired simultaneously with controlled aliasing, and unaliased with parallel imaging...
March 5, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28259678/safety-of-repetitive-transcranial-magnetic-stimulation-in-patients-with-implanted-cortical-electrodes-an-ex-vivo-study-and-report-of-a-case
#19
Nicolás M Phielipp, Utpal Saha, Tejas Sankar, Akihiro Yugeta, Robert Chen
OBJECTIVE: To evaluate the safety of repetitive transcranial magnetic stimulation (rTMS) in patients with implanted subdural cortical electrodes. METHODS: We performed ex-vivo experiments to test the temperature, displacement and current induced in the electrodes with single pulse transcranial magnetic stimulation (TMS) from 10 to 100% of stimulator output and tested a typical rTMS protocol used in a clinical setting. We then used rTMS to the motor cortex to treat a patient with refractory post-herpetic neuralgia who had previously been implanted with a subdural motor cortical electrode for pain management...
February 13, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28256907/proximal-occlusion-of-unaffected-internal-iliac-artery-versus-distal-occlusion-of-aneurysmatic-internal-iliac-artery-prior-to-evar-a-comparative-evaluation-of-efficacy-and-clinical-outcome
#20
Alexander Dierks, Alexander Sauer, Franziska Wolfschmidt, Nicole Hassold, Richard Kellersmann, Thorsten A Bley, Ralph Kickuth
OBJECTIVE: Occlusion of the internal iliac artery (IIA) may be necessary prior to endovascular aneurysm repair (EVAR) to prevent endoleak Type II. We compared efficacy and clinical outcome after proximal occlusion of an unaffected IIA (ProxEmbx) using an Amplatzer vascular plug (AVP) I vs distal occlusion of aneurysmatic IIA with coils and plugs (DistEmbx). METHODS: Between 2009 and 2012, 22 patients underwent EVAR. In 9 patients with unaffected IIA, occlusion was performed by a single AVP...
April 2017: British Journal of Radiology
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