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https://www.readbyqxmd.com/read/29674842/a-sub-cc-nonlinear-piezoelectric-energy-harvester-for-powering-leadless-pacemakers
#1
M H Ansari, M Amin Karami
A miniature nonlinear piezoelectric energy harvester is developed to power state of the art leadless cardiac pacemakers from cardiac motions. The energy harvester is integrated in the leadless pacemaker and is connected to the myocardium. The energy harvester converts myocardial motions to electricity to power leadless pacemakers. The energy is stored in a battery or supercapacitor and is used for pacing. The device is composed of a bimorph piezoelectric beam confined in a gray iron frame. The system is assembled at high temperature and operated at the body temperature...
February 2018: Journal of Intelligent Material Systems and Structures
https://www.readbyqxmd.com/read/29600780/cardiovascular-magnetic-resonance-imaging-in-a-patient-with-implanted-leadless-pacemaker
#2
Susanne Löbe, Sebastian Hilbert, Gerhard Hindricks, Cosima Jahnke, Ingo Paetsch
No abstract text is available yet for this article.
January 2018: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29552930/cardiac-implantable-electronic-device-and-vascular-access-strategies-to-overcome-problems
#3
Mariusz Kusztal, Krzysztof Nowak
For arrhythmia treatment or sudden cardiac death prevention in hemodialysis patients, there is a frequent need for placement of a cardiac implantable electronic device (pacemaker, implantable cardioverter defibrillator, or cardiac resynchronization device). Leads from a cardiac implantable electronic device can cause central vein stenosis and carry the risk of tricuspid regurgitation or contribute to infective endocarditis. In patients with end-stage kidney disease requiring vascular access and cardiac implantable electronic device, the best strategy is to create an arteriovenous fistula on the contralateral upper limb for a cardiac implantable electronic device and avoidance of central vein catheter...
March 1, 2018: Journal of Vascular Access
https://www.readbyqxmd.com/read/29540439/battery-malfunction-of-a-leadless-cardiac-pacemaker-a-worrisome-single-center-experience
#4
Sergio Richter, Michael Döring, Micaela Ebert, Kerstin Bode, Andreas Müssigbrodt, Philipp Sommer, Daniela Husser, Gerhard Hindricks
Leadless cardiac pacemaker (LCP) therapy has been established clinically as a feasible and safe alternative to conventional transvenous pacemaker therapy for patients with an indication for single-chamber right-ventricular pacing.1-3 However, reports on loss of telemetry and pacing output due to abrupt battery failure called the safety of one of the two commercially available systems seriously into question. The initial battery advisory with the Nanostim™ LCP was issued by the manufacturer in October 2016, who instantly called a global stop to Nanostim™ implants...
March 14, 2018: Circulation
https://www.readbyqxmd.com/read/29538139/leadless-pacemaker-an-interesting-solution-coming-back
#5
Riccardo Cappato
No abstract text is available yet for this article.
February 2018: Journal of Cardiovascular Medicine
https://www.readbyqxmd.com/read/29531727/successful-implantation-of-a-micra-leadless-pacemaker-via-collateral-femoral-vein-and-inferior-vena-cava-filter
#6
Erica Flores, Mayur Patel, Geoffery Orme, Wilber Su
This case details the successful implementation of a leadless pacemaker device in a patient with multiple venous occlusions and an IVC filter. As the incidence of IVC filters increases in patients with dysrhythmias, further investigations are required to determine the risk and safety of leadless pacemaker placement in this population.
March 2018: Clinical Case Reports
https://www.readbyqxmd.com/read/29520466/leadless-pacemaker-implantation-in-a-pediatric-patient-with-prolonged-sinus-pauses
#7
Shai Tejman-Yarden, Eyal Nof, Roy Beinart, Nadav Ovadia, Yuval Goldshmit, Jonathan Buber, Hagith Yonath, Eitan Keizman, Michael Glikson
Permanent cardiac pacing is the only effective solution for patients with symptomatic bradycardia and heart block. About 10% of patients undergoing implantation of the conventional pacing system develop complications related to the subcutaneous pocket or the leads and in pediatric patients lead problems may rise in up to 30% of the patients. The leadless pacemaker devices were developed in order to minimize some of those complications. We present a case of an 11-year-old patient who presented after the sudden death of his older brother, with recurrent episodes of syncope and documented prolonged sinus pauses...
March 8, 2018: Pediatric Cardiology
https://www.readbyqxmd.com/read/29496606/safety-and-feasibility-of-leadless-pacemaker-in-patients-undergoing-atrioventricular-node-ablation-for-atrial-fibrillation
#8
Bharath Yarlagadda, Mohit K Turagam, Tawseef Dar, Pragna Jangam, Vaishnavi Veerapaneni, Donita Atkins, Sudharani Bommana, Paul Friedman, Abhishek J Deshmukh, Rahul Doshi, Vivek Y Reddy, Srinivas R Dukkipati, Andrea Natale, Dhanunjaya Lakkireddy
BACKGROUND: Atrioventricular node (AV) ablation and permanent pacing is an established strategy for rate control in the management of symptomatic atrial fibrillation (AF). Leadless pacemakers (LP) can overcome some of the short-term and long-term limitations of conventional transvenous pacemakers (CTP). OBJECTIVES: Compare the feasibility and safety of LP vs single chamber CTP in AF patients undergoing AVN ablation. METHODS: We conducted a multicenter, observational study of patients undergoing AVN ablation and pacemaker implantation (LP vs...
February 26, 2018: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29487683/successful-denovo-implantation-and-explanation-of-an-old-malfunctioning-micratm-leadless-pacemaker
#9
Muhammad R Afzal, Tawseef Dar, Mahmoud Houmsse, Ralph Augostini, Emile G Daoud, John Hummel
An unknown mass in the left atrium can be challenging to differentiate, especially after previous heart transplant. A precise diagnosis is clinically crucial because of the therapeutic implications. CMR is a useful, non-invasive tool to distinguish intra-cardiac lesions, thereby enabling clinicians to initiate adequate therapy.
December 2017: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/29476660/leadless-pacemaker-implantation-and-concurrent-atrioventricular-junction-ablation-in-patients-with-atrial-fibrillation
#10
Toshimasa Okabe, Mikhael F El-Chami, Michael S Lloyd, Benjamin Buck, Charles C Gornick, JoEllyn C Moore, Ralph S Augostini, John D Hummel
BACKGROUND: Atrioventricular junctional (AVJ) ablation and pacemaker implantation is indicated when pharmacotherapy fails to achieve adequate rate control in atrial fibrillation (AF). The purpose of our study is to assess the feasibility and safety of concurrent Micra leadless transcatheter pacemaker implantation and AVJ ablation. METHODS: We retrospectively assessed patients who underwent Micra implantation and concurrent AVJ ablation at three institutions between 8/2014 and 3/2016...
February 24, 2018: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29462311/device-orientation-of-a-leadless-pacemaker-and-subcutaneous-implantable-cardioverter-defibrillator-in-canine-and-human-subjects-and-the-effect-on-intrabody-communication
#11
Anne-Floor B E Quast, Fleur V Y Tjong, Brendan E Koop, Arthur A M Wilde, Reinoud E Knops, Martin C Burke
Aims: The development of communicating modular cardiac rhythm management systems relies on effective intrabody communication between a subcutaneous implantable cardioverter-defibrillator (S-ICD) and a leadless pacemaker (LP), using conducted communication. Communication success is affected by the LP and S-ICD orientation. This study is designed to evaluate the orientation of the LP and S-ICD in canine subjects and measure success and threshold of intrabody communication. To gain more human insights, we will explore device orientation in LP and S-ICD patients...
February 14, 2018: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29453212/implant-of-a-left-atrial-appendage-occluder-device-watchman-and-leadless-pacing-system-micra-through-the-same-venous-access-in-a-single-sitting
#12
Sofian Johar, Nazar Luqman
A left atrial appendage occluder device (Watchman) and leadless pacemaker (Micra) was implanted from a single right femoral vein access in a 73-year-old female patient with persistent atrial fibrillation and symptomatic tachy-brady syndrome and unable to take oral anticoagulants. Standard methods of implantation were followed for both procedures. The Watchman device was implanted first followed by dilatation of the same venous access site in order to implant Micra transcatheter pacing system. The patient tolerated the procedures well and there were no complications...
February 16, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29428139/leadless-pacemakers-state-of-the-art-and-future-perspectives
#13
REVIEW
Domenico G Della Rocca, Carola Gianni, Luigi Di Biase, Andrea Natale, Amin Al-Ahmad
Leadless pacemaker therapy is a new technology that aims at avoiding lead- and pocket-related complications of conventional transvenous and epicardial pacing. To date, 2 self-contained leadless pacemakers for right ventricular pacing have been clinically available: the Nanostim Leadless Pacemaker System and the Micra Transcatheter Pacing System. Additionally, a new multicomponent leadless pacemaker for endocardial left ventricular pacing has been proposed as an alternative choice for cardiac resynchronization therapy...
March 2018: Cardiac Electrophysiology Clinics
https://www.readbyqxmd.com/read/29427820/techniques-for-successful-early-retrieval-of-the-micra-transcatheter-pacing-system-a-worldwide-experience
#14
Muhammad R Afzal, Emile G Daoud, Ryan Cunnane, Shiva K Mulpuru, Alan Koay, Azlan Hussain, Razali Omar, Koh Kok Wei, Anish Amin, Gregory Kidwell, Nirav Patel, Charles Love, Michel Llyod, Maciej Sterliński, Seth Goldbarg, Miguel A Leal, James Gabriels, Apoor Patel, Ram Jadonath, Eric Grubman, George Crossley, Chris Pepper, Dhanunjaya Lakkireddy, Toshimasa Okabe, John D Hummel, Ralph S Augostini
BACKGROUND: Due to relatively newer technology, experience with retrieval of Micra transcatheter pacing system (TPS) is limited. Although, it is recommended to abandon the TPS at end of life, certain situations such as endovascular infections or device embolization warrant retrieval. OBJECTIVES: To report worldwide experience of successful retrieval for Micra TPS. METHODS: The list of all successful retrievals for the currently available leadless pacemakers (LPs) was obtained from the manufacturer of Micra TPS...
February 7, 2018: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29365073/primary-safety-results-from-the-leadless-observational-study
#15
Johannes Sperzel, Pascal Defaye, Peter-Paul Delnoy, Juan Jose Garcia Guerrero, Reinoud E Knops, Claudio Tondo, Jean-Claude Deharo, Tom Wong, Petr Neuzil
Aims: A prospective, single-arm, multicentre, post-market study was conducted to confirm the short-term safety of the Nanostim™ leadless pacemaker (LP). In this study, we report the primary results of the LEADLESS Observational Study. Methods and results: Subjects meeting VVIR pacemaker indications were enrolled and followed up after successful LP implantation, prior to discharge and post-implantation at 90 days, 180 days, and every 6 months thereafter for the assessment of adverse events...
January 19, 2018: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29360974/use-of-leadless-pacemakers-in-europe-results-of-the-european-heart-rhythm-association-survey
#16
Serge Boveda, Radoslaw Lenarczyk, Kristina H Haugaa, Konstantinos Iliodromitis, Malcolm Finlay, Deirdre Lane, Frits W Prinzen, Nikolaos Dagres
The purpose of this European Heart Rhythm Association (EHRA) survey is to provide an overview of the current use of leadless pacemakers (LLPM) across a broad range of European centres. An online questionnaire was sent to centres participating in the EHRA Electrophysiology Research Network. Questions dealt with standards of care and policies used for patient management, indications, and techniques of implantation of LLPM. In total, 52 centres participated in the survey. Most (86%) reported using LLPM, although 82% of these centres implanted <30 LLPM devices during the last 12 months...
March 1, 2018: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29346109/endocardial-energy-harvesting-by-electromagnetic-induction
#17
Adrian Zurbuchen, Andreas Haeberlin, Lukas Bereuter, Alois Pfenniger, Simon Bosshard, Micha Kernen, Paul Philipp Heinisch, Juerg Fuhrer, Rolf Vogel
OBJECTIVE: cardiac pacemakers require regular medical follow-ups to ensure proper functioning. However, device replacements due to battery depletion are common and account for ∼25% of all implantation procedures. Furthermore, conventional pacemakers require pacemaker leads which are prone to fractures, dislocations or isolation defects. The ensuing surgical interventions increase risks for the patients and costs that need to be avoided. METHODS: in this study, we present a method to harvest energy from endocardial heart motions...
February 2018: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/29335839/successful-replacement-of-the-longest-worldwide-in-situ-nanostim-leadless-cardiac-pacemaker-for-a-micra-transcatheter-pacing-system
#18
Niek E G Beurskens, Fleur V Y Tjong, Anne-Floor B E Quast, Reinoud E Knops
No abstract text is available yet for this article.
March 2018: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/29300871/leadless-pacemaker-implantation-in-achondroplastic-dwarfism-and-recurrent-cardiac-implantable-electronic-device-infections-a-case-report
#19
Giovanni Morani, Bruna Bolzan, Gianluca Borio, Luca Tomasi, Flavio Luciano Ribichini
No abstract text is available yet for this article.
December 29, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29291376/intraoperative-implantation-of-micra-leadless-pacemaker-during-valve-surgery
#20
Ibrahim Marai, Sammer Diab, Ronny Ben-Avi, Erez Kachel
The Micra transcatheter leadless pacemaker, a single chamber leadless ventricular pacemaker, is implanted percutanneously through femoral vein. We present a case of patient in whom, Micra leadless pacemaker was implanted during valve surgery.
December 29, 2017: Annals of Thoracic Surgery
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