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Leadless cardiac pacemaker

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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/29552930/cardiac-implantable-electronic-device-and-vascular-access-strategies-to-overcome-problems
#2
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
#3
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/29520466/leadless-pacemaker-implantation-in-a-pediatric-patient-with-prolonged-sinus-pauses
#4
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/29487683/successful-denovo-implantation-and-explanation-of-an-old-malfunctioning-micratm-leadless-pacemaker
#5
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
#6
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
#7
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/29428139/leadless-pacemakers-state-of-the-art-and-future-perspectives
#8
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/29365073/primary-safety-results-from-the-leadless-observational-study
#9
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/29346109/endocardial-energy-harvesting-by-electromagnetic-induction
#10
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
#11
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
#12
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/29274799/leadless-pacing-in-a-young-patient-with-cardioinhibitory-vasovagal-syncope
#13
Valentina De Regibus, Darragh Moran, Gian Battista Chierchia, Pedro Brugada, Carlo de Asmundis
Vasovagal syncope is characterized by vasodilatation and/or bradycardia and thereby a fall in arterial BP and global cerebral perfusion in response to a trigger. Although it is a benign condition, patients with frequent and traumatic episodes need treatment in order to improve quality of life. We describe the case of a 17-years-old boy suffering from cardioinhibitory syncope. At the end of a complete negative cardiac and neurological examination, a loop recorder was implanted. During the subsequent follow-up the ILR documented a 9-s pause...
December 21, 2017: Indian Pacing and Electrophysiology Journal
https://www.readbyqxmd.com/read/29250229/leadless-pacemakers-implant-explant-and-long-term-safety-and-efficacy-data
#14
REVIEW
Krishna Kancharla, Abhishek J Deshmukh, Paul A Friedman
Implantable cardiac pacemakers have seen remarkable progress in the last sixty years and remained as cornerstone therapy for symptomatic bradycardia. Despite this progress the current day traditional transvenous implanted pacemaker systems are limited by the need for a surgically created pocket for the generator, indwelling leads in the vascular system and lastly passage through the tricuspid valve. A majority of the implant and explant related complications are due to the surgical pocket and indwelling leads...
August 2017: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/29221628/recommendations-for-the-implantation-of-leadless-pacemakers-from-the-french-working-group-on-cardiac-pacing-and-electrophysiology-of-the-french-society-of-cardiology
#15
Pascal Defaye, Didier Klug, Frederic Anselme, Daniel Gras, Jean-Sylvain Hermida, Olivier Piot, Christine Alonso, Laurent Fauchier, Estelle Gandjbakhch, Eloi Marijon, Philippe Maury, Jérôme Taieb, Serge Boveda, Nicolas Sadoul
No abstract text is available yet for this article.
January 2018: Archives of Cardiovascular Diseases
https://www.readbyqxmd.com/read/29194683/leadless-pacemaker-extraction-from-a-single-center-perspective
#16
Elkin González Villegas, Omar Al Razzo, Jorge Silvestre García, José Mesa García
BACKGROUND: Leadless pacemaker can be considered as a technical revolution in cardiac pacing devices, with clear advantages over conventional pacemakers in overcoming all lead-related complications. However, the management of these devices once they reach the end of life (EOL) of the battery is still controversial. In the next years, there will be an increase in the need to define a clear strategy in the management of leadless PM once they reach their EOL. Safe extraction of these devices will define in a great manner this strategy METHODS: We performed the extraction of three functioning Nanostim leadless pacemaker prophylactically in two females and one male patients as part of the Nanostim battery depletion field action recommendation...
February 2018: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29189109/monocentric-experience-of-leadless-pacing-with-focus-on-challenging-cases-for-conventional-pacemaker
#17
Christophe Garweg, Joris Ector, Gabor Voros, Adèle Greyling, Bert Vandenberk, Stefaan Foulon, Rik Willems
AIM: Leadless cardiac pacemaker has been developed to reduce complications related to cardiac pacing and is considered as an alternative to conventional pacemaker although safety and efficacy data in clinical practice are limited. The purpose of this study was to investigate the safety and efficacy profile of Micra Transcatheter Pacing System (TPS) used in daily clinical activity with a focus on challenging cases for conventional pacing. METHODS: A total of 66 patients (46 men, 79...
November 30, 2017: Acta Cardiologica
https://www.readbyqxmd.com/read/29110935/successful-percutaneous-retrieval-of-a-leadless-pacemaker-due-to-an-acute-rise-in-pacing-threshold
#18
Ngai-Yin Chan, Ho-Chuen Yuen, Ngai-Shing Mok
Leadless cardiac pacemakers (LCP) have become available recently. Both its acute and long-term performance in a large population of patients remain to be tested. Subacute rise in pacing threshold has been reported as an uncommon complication. On the other hand, the retrieval technique for LCP with passive fixation mechanism has not been previously described in details. Herein we report a newly recognized complication of an acute rise in pacing threshold very soon after implantation of an LCP without radiographic dislodgement...
October 28, 2017: Indian Pacing and Electrophysiology Journal
https://www.readbyqxmd.com/read/29045345/leadless-cardiac-pacemakers-present-and-the-future
#19
Derek S Chew, Vikas Kuriachan
PURPOSE OF REVIEW: Pacing technology for many decades has been composed of a generator attached to leads that are usually transvenous. Recently, leadless pacemakers have been studied in clinical settings and now available for use in many countries. This includes the single-component Nanostim Leadless Cardiac Pacemaker and Micra Transcatheter Pacing System, as well as the multicomponent Wireless Stimulation Endocardial system. RECENT FINDINGS: Clinical studies in single-component leadless pacing technology has shown that they can be successfully implanted with minimal complications...
January 2018: Current Opinion in Cardiology
https://www.readbyqxmd.com/read/29021417/miniaturized-leadless-cardiac-pacemakers-can-they-overcome-the-problems-with-transvenous-pacing-systems
#20
EDITORIAL
Yasushi Oginosawa, Ritsuko Kohno, Hisaharu Ohe, Haruhiko Abe
No abstract text is available yet for this article.
October 25, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
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