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Leadless cardiac pacemaker

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https://www.readbyqxmd.com/read/28733677/inductively-powered-wireless-pacing-via-a-miniature-pacemaker-and-remote-stimulation-control-system
#1
Parinaz Abiri, Ahmad Abiri, René R Sevag Packard, Yichen Ding, Alireza Yousefi, Jianguo Ma, Malcolm Bersohn, Kim-Lien Nguyen, Dejan Markovic, Shervin Moloudi, Tzung K Hsiai
Pacemakers have existed for decades as a means to restore cardiac electrical rhythms. However, lead-related complications have remained a clinical challenge. While market-released leadless devices have addressed some of the issues, their pacer-integrated batteries cause new health risks and functional limitations. Inductive power transfer enables wireless powering of bioelectronic devices; however, Specific Absorption Rate and size limitations reduce power efficiency for biomedical applications. We designed a remote-controlled system in which power requirements were significantly reduced via intermittent power transfer to control stimulation intervals...
July 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28707515/successful-repositioning-of-leadless-cardiac-pacemaker-during-open-heart-surgery
#2
Christophe Garweg, Joris Ector, Wouter Oosterlinck, Rik Willems, Paul Herijgers
No abstract text is available yet for this article.
July 14, 2017: Acta Cardiologica
https://www.readbyqxmd.com/read/28696087/leadless-technology-a-new-paradigm-for-cardiac-pacing
#3
Giulio Zucchelli, Valentina Barletta, Maria G Bongiorni
Leadless pacemaker (LP) technology was recently developed and introduced for clinical purpose as an alternative to traditional systems in order to reduce leads and pocket-related complications. Currently, two self-contained right ventricular pacemaker implanted by using a femoral percutaneous approach have been developed and initial results seem promising. Although the clinical use is still limited to the right ventricular pacing, the LP currently represents a valid and alternative solution in several settings, when the standard pacemaker cannot be used or its use is associated with higher risk of complications...
July 10, 2017: Minerva Cardioangiologica
https://www.readbyqxmd.com/read/28666317/right-ventricular-and-tricuspid-valve-function-in-patients-chronically-implanted-with-leadless-pacemakers
#4
Erwan Salaun, Lilith Tovmassian, Blandine Simonnet, Roch Giorgi, Frédéric Franceschi, Linda Koutbi-Franceschi, Jérôme Hourdain, Gilbert Habib, Jean-Claude Deharo
Aims: Leadless cardiac pacing has recently been proposed as alternative to conventional right ventricular (RV) pacing. With this approach, devices are directly screwed or fixed with tines in the RV wall, but the possible consequences on RV and tricuspid valve (TV) structure and function remain unknown. We thus conducted a study to evaluate this potential impact in chronically implanted patients. Methods and results: Repeated echocardiographic studies were performed prior to implantation, at discharge, and 2 months thereafter on all consecutive patients implanted with a leadless pacemaker at our centre between October 2014 and end-December 2015...
June 28, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28595994/-news-techniques-of-pacing-in-congenital-heart-diseases
#5
Mathieu Le Bloa, Jean-Benoît Thambo
The number of children and adult with congenital heart disease requiring implantation of cardiac pacemaker or cardioverter defibrillator is constantly increasing. The lead between stimulation/defibrillation site and the generator constitutes the main weakpoint of those devices despite the numerous recent technological advances: use of bipolar probes, corticoid elution electrodes, insulation improvement, magnetic resonance imaging (MRI) compatibility. Risk of device failure remains high in this population. Long term adverse events with endovascular devices remain high...
June 5, 2017: La Presse Médicale
https://www.readbyqxmd.com/read/28583688/neointimal-fibrotic-lead-encapsulation-clinical-challenges-and-demands-for-implantable-cardiac-electronic-devices
#6
REVIEW
Jonas Keiler, Marko Schulze, Martina Sombetzki, Thomas Heller, Tina Tischer, Niels Grabow, Andreas Wree, Dietmar Bänsch
Every tenth patient with a cardiac pacemaker or implantable cardioverter-defibrillator implanted is expected to have at least one lead problem in his lifetime. However, transvenous leads are often difficult to remove due to thrombotic obstruction or extensive neointimal fibrotic ingrowth. Despite its clinical significance, knowledge on lead-induced vascular fibrosis and neointimal lead encapsulation is sparse. Although leadless pacemakers are already available, their clinical operating range is limited. Therefore, lead/tissue interactions must be further improved in order to improve lead removals in particular...
July 2017: Journal of Cardiology
https://www.readbyqxmd.com/read/28529181/leadless-cardiac-pacemakers-current-status-of-a-modern-approach-in-pacing
#7
REVIEW
Skevos Sideris, Stefanos Archontakis, Polychronis Dilaveris, Konstantinos A Gatzoulis, Konstantinos Trachanas, Ilias Sotiropoulos, Petros Arsenos, Dimitrios Tousoulis, Ioannis Kallikazaros
Since the first transvenous pacemaker implantation, that took place 50 years ago, important progress has been achieved in pacing technology. Consequently, today, more than 700,000 pacemakers are implanted annually worldwide. However, conventional pacemakers' implantation carries a non-negligible risk of periprocedural and long-term complications associated with the transvenous leads and pacemaker pocket. Recently, Leadless Pacing Systems have emerged as a therapeutic alternative to conventional pacing systems providing therapy for patients with bradyarrhythmias, while eliminating potential transvenous leads and pacemaker pocket related complications...
May 18, 2017: Hellenic Journal of Cardiology: HJC, Hellēnikē Kardiologikē Epitheōrēsē
https://www.readbyqxmd.com/read/28502871/a-leadless-pacemaker-in-the-real-world-setting-the-micra-transcatheter-pacing-system-post-approval-registry
#8
Paul R Roberts, Nicolas Clementy, Faisal Al Samadi, Christophe Garweg, Jose Luis Martinez-Sande, Saverio Iacopino, Jens Brock Johansen, Xavier Vinolas Prat, Robert Kowal, Didier Klug, Lluis Mont, Jan Steffel, Shelby Li, Dirk Van Osch, Mikhael F El-Chami
BACKGROUND: First-in-man studies of leadless pacemakers have demonstrated high rates of implant success, and safety and efficacy objectives were achieved. Outside of the investigational setting, there are concerns, particularly over cardiac effusion and perforation, device dislodgement, infection, telemetry, and battery issues. OBJECTIVE: The acute performance of the Micra transcatheter pacemaker from a worldwide postapproval registry is reported. METHODS: The registry is an ongoing prospective single-arm observational study designed to assess the safety and effectiveness of Micra in the postapproval setting...
May 11, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28496929/management-of-patients-with-atrial-fibrillation-focus-on-treatment-options
#9
REVIEW
Pawel Matusik, Jacek Lelakowski, Barbara Malecka, Jacek Bednarek, Remigiusz Noworolski
Atrial fibrillation (AF) is leading cardiac arrhythmia with important clinical implications. Its diagnosis is usually made on the basis on 12-lead ECG or 24-hour Holter monitoring. More and more clinical evidence supports diagnostic use of cardiac event recorders and cardiovascular implantable electronic devices (CIED). Treatment options in patients with atrial fibrillation are extensive and are based on chosen rhythm and/or rate control strategy. The use and selected contraindications to AF related pharmacotherapy, including anticoagulants are shown...
October 2016: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/28491705/implantation-of-a-leadless-cardiac-pacemaker-for-recurrent-pocket-infections
#10
Philip M Chang, Rahul N Doshi
No abstract text is available yet for this article.
July 2016: HeartRhythm Case Reports
https://www.readbyqxmd.com/read/28489502/advances-in-cardiac-pacing-and-defibrillation
#11
REVIEW
Kristin Ellison, Parikshit S Sharma, Richard Trohman
There have been many evolutionary milestones in cardiac implantable electronic device (CIED) therapy over the past few decades. These advancements have created new  challenges. Right ventricular pacing was the original (late 1950s) breakthrough, however the risk of pacing induced dyssynchrony has become evident. Biventricular pacing provided a viable way to mitigate dyssynchrony, but only benefits certain patients (primarily left bundle branch block and QRS duration ≥150 ms with depressed left ventricular (LV) function)...
June 2017: Expert Review of Cardiovascular Therapy
https://www.readbyqxmd.com/read/28396380/permanent-leadless-cardiac-pacemaker-therapy-a-comprehensive-review
#12
REVIEW
Fleur V Y Tjong, Vivek Y Reddy
A new technology, leadless pacemaker therapy, was recently introduced clinically to address lead- and pocket-related complications in conventional transvenous pacemaker therapy. These leadless devices are self-contained right ventricular single-chamber pacemakers implanted by using a femoral percutaneous approach. In this review of available clinical data on leadless pacemakers, early results with leadless devices are compared with historical results with conventional single-chamber pacing. Both presently manufactured leadless pacemakers show similar complications, which are mostly related to the implant procedure: cardiac perforation, device dislocation, and femoral vascular access site complications...
April 11, 2017: Circulation
https://www.readbyqxmd.com/read/28365650/advancements-in-pacemaker-technology-the-leadless-device
#13
Mary Leier
Leadless pacemakers will most likely be the future of cardiac pacing. Leadless pacing employs a single-chamber system to pace only the right ventricle and is fully self-contained, which eliminates the need for leads. These systems, implanted by using a transcatheter sheath, are indicated for patients who need right ventricular pacing only. These devices enable patients to avoid lead-related complications, from lead fracture to extraction challenges, as well as pocket-related complications such as infection and disfigurement...
April 2017: Critical Care Nurse
https://www.readbyqxmd.com/read/28295442/cremation-of-leadless-pacemaker
#14
Lily Cheung, Gary C P Chan, Joseph Y S Chan, Chu-Pak Lau
Cremation of implanted cardiac electronic devices can be associated with explosion from rapid gas formation causing potential hazard to the crematoria staffs and facilities. We present four patients who had undergone cremation with a leadless pacemaker (Micra(TM) , Medtronic Inc., Minneapolis, MN, USA) left inside their bodies. There was neither reported explosion nor damage to the cremation chamber during the cremation process. In this small series, cremation of Micra(TM) is not associated with noticeable explosion...
March 11, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28165125/three-tesla-cardiac-magnetic-resonance-imaging-in-a-patient-with-a-leadless-cardiac-pacemaker-system
#15
Alexander Kypta, Hermann Blessberger, Daniel Kiblboeck, Clemens Steinwender
No abstract text is available yet for this article.
February 6, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28148576/lead-or-be-led-an-update-on-leadless-cardiac-devices-for-general-physicians
#16
REVIEW
Benedict M Wiles, Paul R Roberts
Implantable cardiac devices have an increasingly important role. Pacemakers remain the only effective treatment for symptomatic bradycardia; cardiac resynchronisation therapy is a proven treatment for heart failure; and implantable cardioverter defibrillators (ICD) are superior to medical therapy in prevention of sudden cardiac death. Our ageing population has led to a rising number of device implants. Physicians in all specialties increasingly encounter patients with cardiac devices and require an understanding of their capabilities and functions...
February 2017: Clinical Medicine: Journal of the Royal College of Physicians of London
https://www.readbyqxmd.com/read/28011844/the-visible-heart%C3%A2-project-and-free-access-website-atlas-of-human-cardiac-anatomy
#17
Paul A Iaizzo
AIMS: Pre- and post-evaluations of implantable cardiac devices require innovative and critical testing in all phases of the design process. The Visible Heart(®) Project was successfully launched in 1997 and 3 years later the Atlas of Human Cardiac Anatomy website was online. The Visible Heart(®) methodologies and Atlas website can be used to better understand human cardiac anatomy, disease states and/or to improve cardiac device design throughout the development process. METHODS AND RESULTS: To date, Visible(®) Heart methodologies have been used to reanimate 75 human hearts, all considered non-viable for transplantation...
December 2016: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/27932427/retrieval-of-the-leadless-cardiac-pacemaker-a-multicenter-experience
#18
MULTICENTER STUDY
Vivek Y Reddy, Marc A Miller, Reinoud E Knops, Petr Neuzil, Pascal Defaye, Werner Jung, Rahul Doshi, Mark Castellani, Adam Strickberger, R Hardwin Mead, Harish Doppalapudi, Dhanunjaya Lakkireddy, Matthew Bennett, Johannes Sperzel
BACKGROUND: Leadless cardiac pacemakers have emerged as a safe and effective alternative to conventional transvenous single-chamber ventricular pacemakers. Herein, we report a multicenter experience on the feasibility and safety of acute retrieval (<6 weeks) and chronic retrieval (>6 weeks) of the leadless cardiac pacemaker in humans. METHODS AND RESULTS: This study included patients enrolled in 3 multicenter trials, who received a leadless cardiac pacemaker implant and who subsequently underwent a device removal attempt...
December 2016: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/27925339/incidence-of-cardiac-perforation-with-conventional-and-with-leadless-pacemaker-systems-a-systematic-review-and-meta-analysis
#19
Mate Vamos, Julia W Erath, Alexander P Benz, Zsolt Bari, Gabor Z Duray, Stefan H Hohnloser
INTRODUCTION: Two leadless pacemaker (PM) systems were recently developed to avoid pocket- and lead-related complications. As leadless PMs are implanted with a large delivery catheter, cardiac perforation remains a major safety concern. We aimed to provide a literature review on incidence of cardiac perforation with conventional and with leadless PM systems. METHODS AND RESULTS: A systematic review over the last 25 years for studies reporting data on PM lead perforation was performed...
December 7, 2016: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/27889044/leadless-pacemakers
#20
REVIEW
Mikhael F El-Chami, Faisal M Merchant, Angel R Leon
Leadless pacing is an emerging technology with the potential to significantly improve outcomes associated with the need for long-term pacing. Specifically, the major advantage of leadless systems is abolishing the need for transvenous leads and subcutaneous pockets, both of which account for most adverse events associated with traditional pacemakers. Two leadless pacemakers are currently available: the Nanostim (leadless cardiac pacemaker [LCP]) device (St. Jude Medical, Sylmar, California) and the Micra Transcatheter pacing system (Medtronic, Minneapolis, Minnesota)...
January 1, 2017: American Journal of Cardiology
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