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Implantable loop recorder

David M Page, Jacob A George, David T Kluger, Christopher Duncan, Suzanne Wendelken, Tyler Davis, Douglas T Hutchinson, Gregory A Clark
We quantified prosthesis embodiment and phantom pain reduction associated with motor control and sensory feedback from a prosthetic hand in one human with a long-term transradial amputation. Microelectrode arrays were implanted in the residual median and ulnar arm nerves and intramuscular electromyography recording leads were implanted in residual limb muscles to enable sensory feedback and motor control. Objective measures (proprioceptive drift) and subjective measures (survey answers) were used to assess prosthesis embodiment...
2018: Frontiers in Human Neuroscience
Lauren E Stone, Steven M Falowski
Spinal cord stimulation is a well-established and effective therapy in the treatment of pain. Proper patient selection and accurate lead placement are paramount in its success. Placement is a multifaceted process requiring proper paddle placement, a well thought out generator placement and appropriate means to limit complications and enhance success. Several intraoperative techniques maximize outcomes, including removal of the superior portion of the inferior level's spinous process for paddle access into the epidural space, generator pocket placement in a location that limits patient discomfort, a strain relief loop at the thoracic incision to prevent lead fractures and allow for full spinal flexibility, generator placement parallel to the body and secured in the pocket to prevent unwanted movement, and intraoperative neuromonitoring for patient comfort and more accurate lead placement compared to X-ray alone or awake placement...
October 5, 2018: Operative Neurosurgery (Hagerstown, Md.)
Luca Segreti, Kristian Ujka, Tea Cellamaro, Giulio Zucchelli, Andrea Di Cori, Ezio Soldati, Maria Grazia Bongiorni
An 86-year-old man with unremarkable clinical history complaining of asthenia and dyspnea was diagnosed with low-flow low-gradient aortic stenosis [LFLG-AS; left ventricular ejection fraction (LVEF) 40% and transaortic mean gradient 37 mmHg, increasing to 52% and 55 mmHg after dobutamine infusion]. The patient underwent transcatheter aortic valve implantation (TAVI; Edwards CENTERA™ 29, Irvine, CA, USA). The procedure and the following hospital stay were free from complications, with no changes on electrocardiography (ECG)...
June 2018: Journal of Cardiology Cases
Cynthia Yeung, Doran Drew, Sharlene Hammond, Wilma M Hopman, Damian Redfearn, Christopher Simpson, Hoshiar Abdollah, Adrian Baranchuk
Atrial fibrillation (AF) is a risk factor for ischemic stroke and reported to be associated with severe obstructive sleep apnea (OSA). The aim of this study was to determine the occurrence of newly detected AF in patients with severe OSA and no previous history of AF. Prospective observational study included patients with severe OSA (Apnea-Hypopnea Index [AHI] ≥ 30) and no history of AF. Primary outcome was detection of AF lasting ≥10 seconds. Patients were subjected to 2 24-hour Holter monitors, and if no AF was detected, implanted with a Medtronic Reveal XT implantable loop recorder...
September 7, 2018: American Journal of Cardiology
Tilman Perrin, Michael Kühne, Jan Novak
No abstract text is available yet for this article.
September 28, 2018: Indian Pacing and Electrophysiology Journal
João Ferreira-Martins, James Howard, Becker Al-Khayatt, Joseph Shalhoub, Afzal Sohaib, Matthew J Shun-Shin, Paul G Novak, Rick Leather, Laurence D Sterns, Christopher Lane, Phang Boon Lim, Prapa Kanagaratnam, Nicholas S Peters, Darrel P Francis, Markus B Sikkel
OBJECTIVE: We tested whether ablation methodology and study design can explain the varying outcomes in terms of AF-free survival at 1 year. BACKGROUND: There have been numerous paroxysmal AF ablation trials, which are heterogeneous in their use of different ablation techniques and study design. A useful approach to understanding how these factors influence outcome is to dismantle the trials into individual arms and reconstitute them as a large meta-regression. METHODS: Data was collected from 66 studies (6941 patients)...
September 19, 2018: Journal of Cardiovascular Electrophysiology
Dámaris K Rangel Guerrero, James G Donnett, Jozsef Csicsvari, Krisztián A Kovács
With the advent of optogenetics, it became possible to change the activity of a targeted population of neurons in a temporally controlled manner. To combine the advantages of 60-channel in vivo tetrode recording and laser-based optogenetics, we have developed a closed-loop recording system that allows for the actual electrophysiological signal to be used as a trigger for the laser light mediating the optogenetic intervention. We have optimized the weight, size, and shape of the corresponding implant to make it compatible with the size, force, and movements of a behaving mouse, and we have shown that the system can efficiently block sharp wave ripple (SWR) events using those events themselves as a trigger...
July 2018: ENeuro
Satish Ramkumar, Nitesh Nerlekar, Daniel D'Souza, Derek J Pol, Jonathan M Kalman, Thomas H Marwick
OBJECTIVES: Recent technology advances have allowed for heart rhythm monitoring using single-lead ECG monitoring devices, which can be used for early diagnosis of atrial fibrillation (AF). We sought to investigate the AF detection rate using portable ECG devices compared with Holter monitoring. SETTING, PARTICIPANTS AND OUTCOME MEASURES: We searched the Medline, Embase and Scopus databases (conducted on 8 May 2017) using search terms related to AF screening and included studies with adults aged >18 years using portable ECG devices or Holter monitoring for AF detection...
September 17, 2018: BMJ Open
Akshay Arora, Jui-Jui Lin, Alec Gasperian, Joel Stein, Joseph Maldjian, Michael J Kahana, Bradley Lega
We sought to test the performance of three strategies for binary classification (logistic regression, support vector machines, and deep learning) for the problem of predicting successful episodic memory encoding using direct brain recordings obtained from human stereo EEG subjects. We also sought to test the impact of applying t-distributed stochastic neighbor embedding (tSNE) for unsupervised dimensionality reduction, as well as testing the effect of reducing input features to a core set of memory relevant brain areas...
September 13, 2018: Journal of Neural Engineering
Francisco Poyales, Nuria Garzón, Daniel Pizarro, Santiago Cobreces, Adolfo Hernández
PURPOSE: To compare rotational stability, centration and visual outcomes provided by three trifocal lens models that have the same optical zone design but different material, composition, and/or toricity. METHODS: The study included 78 patients with symmetric bilateral intraocular lens implantation. The lenses under evaluation were trifocal intraocular lenses made of hydrophilic acrylic material: a spherical lens 26% hydrophilic acrylic (POD FineVision), a similar lens but having a toric design (POD Toric FineVision), and a trifocal lens 25% hydrophilic acrylic material (FineVision/MicroF)...
September 10, 2018: European Journal of Ophthalmology
Hongbing Yu, Xiaoou Yi, Felix Hofmann
We propose an automated stereoscopic imaging approach for reconstructing the 3D spatial distribution of small dislocation loops (DLs) from 2D TEM micrographs. This method is demonstrated for small DLs in tungsten, formed by low-dose ion-implantation, that appear as circular spots in diffraction contrast TEM images. To extract the 3D position of specific DLs, their 2D position in multiple weak-beam dark-field TEM micrographs, recorded at different tilt angles, is fitted. From this fit the geometric centre and size of each DL in each micrograph can be extracted...
August 27, 2018: Ultramicroscopy
Marco Capogrosso, Fabien B Wagner, Jerome Gandar, Eduardo Martin Moraud, Nikolaus Wenger, Tomislav Milekovic, Polina Shkorbatova, Natalia Pavlova, Pavel Musienko, Erwan Bezard, Jocelyne Bloch, Grégoire Courtine
Epidural electrical stimulation (EES) of the spinal cord and real-time processing of gait kinematics are powerful methods for the study of locomotion and the improvement of motor control after injury or in neurological disorders. Here, we describe equipment and surgical procedures that can be used to acquire chronic electromyographic (EMG) recordings from leg muscles and to implant targeted spinal cord stimulation systems that remain stable up to several months after implantation in rats and nonhuman primates...
September 2018: Nature Protocols
Nico Reinsch, Ute Ruprecht, Jochen Buchholz, Rolf R Diehl, Hagen Kälsch, Kars Neven
INTRODUCTION: Implantable loop recorders (ILR) are leadless subcutaneous devices that allow cardiac monitoring for up to 3 years and are a valuable tool in the diagnosis of arrhythmias, cryptogenic stroke and unexplained syncope. The Biotronik BioMonitor 2 is a novel, insertable ILR allowing long-term continuous monitoring with wireless telemetry options. METHODS: A single-center, prospective, observational study investigating the reliability of sensing quality and detection performance in the BioMonitor 2 ILR, as well as post-implantation patient satisfaction...
September 2018: Journal of Electrocardiology
K Vogt, H Frenzel, S A Ausili, D Hollfelder, B Wollenberg, A F M Snik, M J H Agterberg
Different amplification options are available for listeners with congenital unilateral conductive hearing loss (UCHL). For example, bone-conduction devices (BCDs) and middle ear implants. The present study investigated whether intervention with an active BCD, the Bonebridge, or a middle ear implant, the Vibrant Soundbridge (VSB), affected sound-localization performance of listeners with congenital UCHL. Listening with a Bonebridge or VSB might provide access to binaural cues. However, when fitted with the Bonebridge, but not with a VSB, binaural processing might be affected through cross stimulation of the contralateral normal hearing ear, and could interfere with processing of binaural cues...
August 26, 2018: Hearing Research
Markus Bettin, Dirk Dechering, Simon Kochhäuser, Niklas Bode, Lars Eckardt, Gerrit Frommeyer, Florian Reinke
BACKGROUND: Implantable loop recorders (ILR) may be used to detect occult atrial fibrillation (AF) in patients with cryptogenic stroke. At present, there has been no description on the incidental findings of stored episodes in these patients. Furthermore, no standard practice has been established with respect to the duration of continued ECG monitoring in these patients. MATERIALS AND METHODS: In the prospective monocentric study (TRACK-AF), a total of 173 patients with cryptogenic stroke received an ILR for detection of AF between November 2010 and December 2014...
August 22, 2018: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
Elma O'Sullivan-Greene, Tatiana Kameneva, David Trevaks, Anthony Shafton, Sophie C Payne, Robin McAllen, John B Furness, David B Grayden
OBJECTIVE: Artificial modulation of peripheral nerve signals (neuromodulation) by electrical stimulation is an innovation with potential to develop treatments that replace or supplement drugs. One function of the nervous system that can be exploited by neuromodulation is regulation of disease intensity. Optimal interfacing of devices with the nervous system requires suitable models of peripheral nerve systems so that closed-loop control can be utilized for therapeutic benefit. APPROACH: We use physiological data to model afferent signaling in the vagus nerve that carries information about inflammation in the small intestine to the brain...
October 2018: Journal of Neural Engineering
Jesse M Conyers, Prabhakar Rajiah, Richard Ahn, Suhny Abbara, Sachin S Saboo
Cardiovascular devices and hemodynamic monitoring systems continue to evolve with the goal of allowing for rapid clinical intervention and management. Cardiovascular devices including the CardioMicroelectromechanical (CardioMEMS) device, implantable loop recorder, and right ventricular (RV) leadless pacemaker are now widely used for treatment and monitoring of advanced cardiac conditions, as many of these devices have been shown to significantly improve patient outcomes. Additionally, hemodynamic monitoring devices have shown utility in monitoring patients with aortic aneurysms after endovascular aortic repair (EVAR) for early detection of Type I and Type II endoleaks...
July 2018: Diagnostic and Interventional Radiology: Official Journal of the Turkish Society of Radiology
Frederic Sacher, Laurence Jesel, Claire Borni-Duval, Valerie De Precigout, Frédéric Lavainne, Jean-Philippe Bourdenx, Atman Haddj-Elmrabet, Bruno Seigneuric, Adrien Keller, Julien Ott, Helene Savel, Yahsou Delmas, Dorothée Bazin-Kara, Nicolas Klotz, Sylvain Ploux, Sébastien Buffler, Philippe Ritter, Virginie Rondeau, Pierre Bordachar, Claire Martin, Antoine Deplagne, Sylvain Reuter, Michel Haissaguerre, Jean-Baptiste Gourraud, Cécile Vigneau, Philippe Mabo, Philippe Maury, Thierry Hannedouche, Antoine Benard, Christian Combe
OBJECTIVES: The aim of this study was to identify using implantable loop recorder (ILR) monitoring the mechanisms leading to sudden death (SD) in patients undergoing hemodialysis (HD). BACKGROUND: SD accounts for 11% to 25% of death in HD patients. METHODS: Continuous rhythm monitoring was performed using the remote monitoring capability of the ILR device in patients undergoing HD at 8 centers. Clinical, biological, and technical HD parameters were recorded and analyzed...
March 2018: JACC. Clinical Electrophysiology
Sofia Skampardoni, Dimitrios Poulikakos, Marek Malik, Darren Green, Philip A Kalra
Cardiovascular mortality is very high in chronic and end-stage kidney disease (ESKD). However, risk stratification data are lacking. Sudden cardiac deaths are among the most common cardiovascular causes of death in these populations. As a result, many studies have assessed the prognostic potential of various electrocardiographic parameters in the renal population. Recent data from studies of implantable loop recordings in haemodialysis patients from five different countries have shed light on a pre-eminent bradyarrhythmic risk of mortality...
August 6, 2018: Nephrology, Dialysis, Transplantation
Garry Hamilton, David O'Donnell, Hui-Chen Han
No abstract text is available yet for this article.
August 6, 2018: Medical Journal of Australia
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