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https://www.readbyqxmd.com/read/28432805/pitfalls-in-electrogram-interpretation-subcutaneous-cardioverter-defibrillator-malfunction-in-brugada-syndrome
#1
Giovanni Morani, Bruna Bolzan, Luca Tomasi, Ruggero Tomei, Corrado Vassanelli
A patient with Brugada Syndrome implanted with subcutaneous cardioverter defibrillator (S-ICD) had oversensing episodes treated with S-ICD shocks. Comparable artefacts weren't evocable with S-ICD pocket manipulation. The fluoroscopy excluded S-ICD macroscopic damage. The device extraction revealed undamaged pulse generator and connector, but the lead was inappropriately tunnelled under the sixth rib. Then the S-ICD malfunction was due to lead microscopic damage caused by lead rubbing the rib surface. This article is protected by copyright...
April 22, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28429529/impaired-left-atrial-function-predicts-inappropriate-shocks-in-primary-prevention-implantable-cardioverter-defibrillator-candidates
#2
Susumu Tao, Hiroshi Ashikaga, Luisa A Ciuffo, Kihei Yoneyama, Joao A C Lima, Terry F Frank, Robert G Weiss, Gordon F Tomaselli, Katherine C Wu
INTRODUCTION: Inappropriate implantable cardioverter-defibrillator (ICD) shocks, commonly caused by atrial fibrillation (AF), are associated with an increased mortality. Because impaired left atrial (LA) function predicts development of AF, we hypothesized that impaired LA function predicts inappropriate shocks beyond a history of AF. METHODS AND RESULTS: We prospectively analyzed the association between LA function and incident inappropriate shocks in primary prevention ICD candidates...
April 21, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28428489/superior-rhythm-discrimination-with-the-smartshock-technology-algorithm%C3%A3-results-of-the-implantable-defibrillator-with-enhanced-features-and-settings-for-reduction-of-inaccurate-detection-defense-trial
#3
Yasushi Oginosawa, Ritsuko Kohno, Toshihiro Honda, Kan Kikuchi, Masatsugu Nozoe, Takayuki Uchida, Hitoshi Minamiguchi, Koichiro Sonoda, Masahiro Ogawa, Takeshi Ideguchi, Yoshihisa Kizaki, Toshihiro Nakamura, Kageyuki Oba, Satoshi Higa, Keiki Yoshida, Soichi Tsunoda, Yoshihisa Fujino, Haruhiko Abe
BACKGROUND: Shocks delivered by implanted anti-tachyarrhythmia devices, even when appropriate, lower the quality of life and survival. The new SmartShock Technology(®)(SST) discrimination algorithm was developed to prevent the delivery of inappropriate shock. This prospective, multicenter, observational study compared the rate of inaccurate detection of ventricular tachyarrhythmia using the SST vs. a conventional discrimination algorithm.Methods and Results:Recipients of implantable cardioverter defibrillators (ICD) or cardiac resynchronization therapy defibrillators (CRT-D) equipped with the SST algorithm were enrolled and followed up every 6 months...
April 20, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28416987/importance-of-exercise-testing-shortly-after-subcutaneous-implantable-cardioverter-defibrillator-implantation-in-patients-with-brugada-syndrome-the-first-case-of-associated-inappropriate-shock-in-japan
#4
Kohei Ishibashi, Takashi Noda, Tsukasa Kamakura, Mitsuru Wada, Yuko Inoue, Hideo Okamura, Kengo Kusano
We report the case of a 51-year-old patient with Brugada syndrome (BrS) who experienced inappropriate shock due to T-wave oversensing (TWOS) during exercise when the optimal sensing vector was selected based on the automatic analysis by a subcutaneous implantable cardioverter-defibrillator (S-ICD). After selecting another vector during exercise testing, TWOS did not re-occur. Selection of appropriate sensing vector based on analyses under various conditions, including during exercise after S-ICD implantation, should be considered for patients with BrS...
April 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/28415177/influence-of-atomic-kinetics-in-the-simulation-of-plasma-microscopic-properties-and-thermal-instabilities-for-radiative-bow-shock-experiments
#5
G Espinosa, R Rodríguez, J M Gil, F Suzuki-Vidal, S V Lebedev, A Ciardi, J G Rubiano, P Martel
Numerical simulations of laboratory astrophysics experiments on plasma flows require plasma microscopic properties that are obtained by means of an atomic kinetic model. This fact implies a careful choice of the most suitable model for the experiment under analysis. Otherwise, the calculations could lead to inaccurate results and inappropriate conclusions. First, a study of the validity of the local thermodynamic equilibrium in the calculation of the average ionization, mean radiative properties, and cooling times of argon plasmas in a range of plasma conditions of interest in laboratory astrophysics experiments on radiative shocks is performed in this work...
March 2017: Physical Review. E
https://www.readbyqxmd.com/read/28411139/the-quidam-study-hydroquinidine-therapy-in-the-management-of-brugada-syndrome-patients-at-high-arrhythmic-risk
#6
Antoine Andorin, Jean-Baptiste Gourraud, Jacques Mansourati, Swanny Fouchard, Hervé le Marec, Philippe Maury, Philippe Mabo, Jean-Sylvain Hermida, Jean-Claude Deharo, Beatrice Delasalle, Simon Esnault, Nicolas Sadoul, Jean-Marc Davy, Antoine Leenhardt, Didier Klug, Pascal Defaye, Dominique Babuty, Frédéric Sacher, Vincent Probst
BACKGROUND: Although the implantable cardiac defibrillator (ICD) remains the main therapy in Brugada syndrome (BrS), it does not reduce life-threatening ventricular arrhythmia. Based on pathophysiological mechanisms, hydroquinidine (HQ) has been suggested for the effective prevention of arrhythmia. OBJECTIVE: To provide evidence-based data supporting HQ use to prevent life threatening ventricular arrhythmia in high-risk patients with BrS. METHODS: We performed a prospective multicentre randomised (HQ vs...
April 11, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28401861/does-difference-in-icd-indication-result-in-a-difference-in-inappropriate-shock-risk
#7
EDITORIAL
J William Schleifer, Samuel J Asirvatham
No abstract text is available yet for this article.
January 2017: Indian Pacing and Electrophysiology Journal
https://www.readbyqxmd.com/read/28401854/inappropriate-implantable-cardioverter-defibrillator-shocks-in-brugada-syndrome-pattern-in-primary-and-secondary-prevention
#8
Aimé Bonny, Mohammed A Talle, Thibaut Vaugrenard, Jérôme Taieb, Marcus Ngantcha
BACKGROUND: Inappropriate implantable cardioverter-defibrillator (ICD) shocks is a common complication in Brugada syndrome. However, the incidence in recipients of ICD for primary and secondary prevention is unknown. METHOD AND RESULTS: We compared the rate of inappropriate shocks in patients with Brugada syndrome that had an ICD for primary and secondary prevention. We studied 51 patients, 86.5% of whom were males. Their mean age at diagnosis was 47 ± 11 years...
January 2017: Indian Pacing and Electrophysiology Journal
https://www.readbyqxmd.com/read/28398367/-implantable-cardioverter-defibrillator-deactivation-at-the-end-of-life-ethical-clinical-and-communication-issues
#9
Massimo Romanò, Maria Antonella Piga, Roberta Bertona, Roberto Negro, Chiara Ruggeri, Federica Zorzoli, Rosvaldo Villani
The number of cardioverter-defibrillator implants is increasing worldwide, with the main indication being primary prevention of sudden cardiac death. During the follow-up, patients may die from progression of their underlying heart disease or from nonarrhythmic causes, such as malignancies, dementia and lung disease, without receiving appropriate shocks until the last few days or weeks of their life. These events occur roughly in 30% of patients, mainly in the last 24 hours before death. In this case, inappropriate and even appropriate shock deliveries can no longer prolong life and may simply lead to pain and reduced quality of life...
February 2017: Giornale Italiano di Cardiologia
https://www.readbyqxmd.com/read/28396781/life-threatening-and-life-saving-inappropriate-implantable-cardioverter-defibrillator-shocks
#10
Jordi Pérez-Rodon, David Doiny, Berta Miranda, Nuria Rivas-Gandara, Ivo Roca-Luque, Jaume Francisco-Pascual, Rosa Maria Lidón, David García-Dorado, Angel Moya Mitjans
An implantable cardioverter defibrillator (ICD) lead dislodgement into the right atrium is a dangerous situation, particularly in patients in atrial fibrillation because atrial fibrillation can be sensed as ventricular fibrillation and true ventricular fibrillation induced with an inappropriate shock. In the presence of shocks, ICD interrogation should be performed as soon as possible.
April 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/28385672/characterization-of-health-care-utilization-in-patients-receiving-implantable-cardioverter-defibrillator-therapies-an-analysis-of-the-managed-ventricular-pacing-trial
#11
John Rickard, David Whellen, Lou Sherfesee, Brett J Peterson, Tara Nahey, Anthony S Tang, Kenneth A Ellenbogen, Alan Cheng
BACKGROUND: Implantable cardioverter defibrillators (ICDs) are effective in terminating lethal arrhythmias, but little is known about the degree of healthcare utilization (HCU) after ICD therapies. OBJECTIVE: Utilizing data from the Managed Ventricular Pacing (MVP) trial, we sought to identify the incidence and types of HCU in ICD recipients after receiving ICD therapy (shocks or anti-tachycardia pacing (ATP)). METHODS: We analyzed HCU events (ventricular tachyarrhythmia (VTA)-related, heart failure (HF)-related, ICD implant procedure-related, ICD system-related, or other) and their association with ICD therapies (shocked ventricular tachycardia (VT) episode, ATP terminated VT episode, inappropriately shocked episode)...
April 3, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28385671/the-safety-and-utility-of-magnetic-resonance-imaging-on-patients-with-cardiovascular-implantable-electronic-devices
#12
Jordan B Strom, Jill B Whelan, Changyu Shen, ShuangQi Zheng, Koenraad J Mortele, Daniel B Kramer
BACKGROUND: Off-label magnetic resonance imaging (MRI) for patients with cardiac implantable electrical devices (CIEDs) has been limited due to concerns about safety and unclear diagnostic and prognostic utility. OBJECTIVE: To define major and minor adverse events with off-label MRIs. METHODS: We prospectively evaluated patients with non-MRI-conditional CIEDs referred for MRIs under a strict clinical protocol. The primary safety outcome was incidence of major adverse events (loss of pacing, inappropriate shock or anti-tachycardia pacing, need for system revision, or death), or minor adverse events (inappropriate pacing, arrhythmias, power on reset events, heating at the generator site, or changes in device parameters at baseline or at 6 months)...
March 31, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28340096/dual-vs-single-chamber-defibrillators-for-primary-prevention-of-sudden-cardiac-death-long-term-follow-up-of-the-d%C3%A3-fibrillateur-automatique-implantable-pr%C3%A3-vention-primaire-registry
#13
Pascal Defaye, Serge Boveda, Didier Klug, Frankie Beganton, Olivier Piot, Kumar Narayanan, Marie-Cécile Périer, Daniel Gras, Laurent Fauchier, Pierre Bordachar, Vincent Algalarrondo, Dominique Babuty, Jean-Claude Deharo, Christophe Leclercq, Eloi Marijon, Nicolas Sadoul
Aims: Implantable cardioverter defibrillators (ICDs) are an effective primary prevention of sudden cardiac death. We examined whether dual-chamber (DC) ICDs confer a greater benefit than single-chamber (SC) ICDs, and compared the long-term outcomes of recipients of each type of device implanted for primary prevention. Methods and results: Between 2002 and 2012, the DAI-PP registry consecutively enrolled 1258 SC- and 1280 DC-ICD recipients at 12 French medical centres...
March 8, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28340057/long-term-outcome-of-pulmonary-vein-isolation-in-patients-with-paroxysmal-atrial-fibrillation-and-brugada-syndrome
#14
Giacomo Mugnai, Burak Hünük, Erwin Ströker, Diego Ruggiero, Hugo Enrique Coutino-Moreno, Ken Takarada, Valentina De Regibus, Rajin Choudhury, Juan Pablo Abugattas de Torres, Darragh Moran, Saverio Iacopino, Pasquale Filannino, Giulio Conte, Juan Sieira, Jan Poelaert, Stefan Beckers, Pedro Brugada, Carlo de Asmundis, Gian-Battista Chierchia
Aims: The therapeutical management of atrial fibrillation (AF) in the setting of Brugada syndrome (BS) might be challenging as many antiarrhythmic drugs (AADs) with sodium channel blocking properties might lead to to the development of ventricular arrhythmias. This study sought to evaluate the clinical outcome in a consecutive series of patients with BS having undergone pulmonary vein (PV) isolation by means of radiofrequency (RF) or cryoballoon (CB) ablation and the efficacy of catheter ablation for preventing inappropriate interventions delivered by implantable cardioverter defibrillators (ICD) on a 3-year follow up...
March 9, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28340005/inappropriate-shocks-in-single-chamber-and-subcutaneous-implantable-cardioverter-defibrillators-a-systematic-review-and-meta-analysis
#15
Angelo Auricchio, J Harrison Hudnall, Edward J Schloss, Laurence D Sterns, Takashi Kurita, Albert Meijer, Dedra H Fagan, Tyson Rogers
Aims: Single-chamber (VR-ICD) and subcutaneous (S-ICD) implantable cardioverter-defibrillators are effective to protect patients against sudden death but expose them to higher risk of inappropriate shock (IS). We sought to quantify the annual rate and influencing factors of ISs in VR- and S-ICDs from the literature. Methods and results: PubMed, Embase, and Cochrane Library were searched for full text articles with IS rates. Poisson distribution estimated proportion of patients with ISs; rates were annualized based on follow-up duration...
March 10, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28329088/short-course-adjunctive-gentamicin-as-empirical-therapy-in-patients-with-severe-sepsis-and-septic-shock-a-prospective-observational-cohort-study
#16
David S Y Ong, Jos F Frencken, Peter M C Klein Klouwenberg, Nicole Juffermans, Tom van der Poll, Marc Bonten, Olaf Cremer
Background.: Meta-analyses failed to demonstrate clinical benefits of beta lactam plus aminoglycoside combination therapy, compared to beta lactam monotherapy, in patients with sepsis. However, few data exist on the effects of short-course adjunctive aminoglycoside therapy in sepsis patients with organ failure or shock. Methods.: We prospectively enrolled consecutive patients with severe sepsis or septic shock in two intensive care units in the Netherlands from 2011 to 2015...
February 28, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28326565/erroneous-magnet-positioning-leads-to-failure-of-inhibition-of-inappropriate-shock-during-fast-conducting-atrial-fibrillation-episodes
#17
Hans Römers, Vincent VAN Dijk, Jippe Balt
We present the case of a 75-year-old patient with a single-chamber St. Jude Medical internal cardioverter defibrillator (ICD; St. Jude Medical, St. Paul, MN, USA) for primary prevention, who was admitted with 39 inappropriate ICD shocks because of atrial fibrillation with rapid ventricular frequention, despite magnet placement. Review of the device manual and literature revealed that apart from different responses to magnet placement programmed for the various manufacturers, the type of magnet and the positioning can be of specific interest...
February 3, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28258389/inappropriate-icd-discharge-related-to-electrical-muscle-stimulation-in-chiropractic-therapy-a-case-report
#18
Abhishek Shenoy, Abhishek Sharma, Firehiwot Achamyeleh
Implantable cardioverter defibrillators (ICDs) have been shown to reduce mortality in high-risk patients. Despite several advances in programming ICDs, inappropriate shocks persist and continue to be psychologically and physically disturbing. External electromagnetic interference from electrocautery, welding, acupunctures, low-output transcutaneous electric nerve stimulators, and electronic muscle stimulators may result in inappropriate ICD sensing and shock. We present a 63-year-old female who presented to the emergency department after an ICD shock while undergoing electronic muscle stimulation in chiropractic treatment, during which light electrical pulses were sent through skin electrodes...
March 3, 2017: Cardiology and Therapy
https://www.readbyqxmd.com/read/28225377/inappropriate-shocks-and-power-delivery-using-adult-automatic-external-defibrillator-pads-in-a-pediatric-patient
#19
Shai Tejman-Yarden, Uriel Katz, Marina Rubinstein, Yehuda Attias, Reem Yahia, David Mishali, Michael Glikson
The use of automatic external defibrillators (AEDs) during pulseless resuscitations is considered safe and reliable, and was established as part of the guidelines in out-of-hospital events. Based on extensive studies, the use of the standard AED is now indicated in every age group with a preference of pediatric pad application for small children and babies. If unavailable, adult pads are recommended. We report a case of 2 inappropriate AED shocks that were delivered to a neonate during a pulseless resuscitation after application of adult pads...
February 21, 2017: Pediatric Emergency Care
https://www.readbyqxmd.com/read/28217234/inappropriate-shocks-from-a-subcutaneous-implantable-cardioverter-defibrillator-due-to-oversensing-during-periods-of-rate-related-bundle-branch-block
#20
Maria João Sousa, Tim Betts
The subcutaneous implantable cardioverter-defibrillator (S-ICD) is a novel technology with proven efficacy in sudden cardiac death prevention; however, there is a lack of long-term safety data. We describe the case of a 55-year-old female patient implanted with an S-ICD due to idiopathic ventricular fibrillation, who subsequently presented with inappropriate shocks leading to ventricular fibrillation that was successfully terminated by another shock. Inappropriate shocks were due to intermittent T wave oversensing during periods of rate-dependent right bundle branch block...
February 2017: Journal of Arrhythmia
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