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Pacing and Clinical Electrophysiology: PACE

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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/28432794/posttraumatic-stress-and-anxiety-in-patients-with-an-implantable-cardioverter-defibrillator-trajectories-and-vulnerability-factors
#2
M Habibović, J Denollet, S S Pedersen
BACKGROUND: Implantable cardioverter defibrillator (ICD) therapy is first-line treatment for the primary and secondary prevention of sudden cardiac death. Despite the unequivocal medical benefits, living with an ICD may affect patients' psychological functioning and general well-being. We examined the trajectories of symptoms of posttraumatic stress disorder (PTSD) and anxiety in patients with an ICD and the vulnerability factors associated with an increased risk of symptoms of PTSD and anxiety...
April 22, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28383202/tachycardia-cycle-and-atrioventricular-nodal-conduction-properties-in-children-with-supraventricular-tachycardia
#3
LETTER
Marcos Mills, Anne M Dubin, Kara S Motonaga, Scott R Ceresnak
No abstract text is available yet for this article.
April 6, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28378381/left-atrial-appendage-ablation-using-cryoballoon
#4
Guram Imnadze, Wolfgang Kranig, Joachim Thale, Thomas Zerm
No abstract text is available yet for this article.
April 4, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28374478/prognostic-implication-of-left-atrial-sphericity-in-atrial-fibrillation-patients-undergoing-radiofrequency-catheter-ablation
#5
Jeonggeun Moon, Hye-Jeong Lee, Jongwook Yu, Hui-Nam Pak, Jong-Won Ha, Moon-Hyoung Lee, Young Jin Kim, Boyoung Joung
BACKGROUND: Left atrial (LA) sphericity can predict recurrence of atrial fibrillation (AF) after radiofrequency catheter ablation (RFCA). We sought to reconfirm the prognostic role of atrial sphericity after RFCA of AF, assess any relationship between the atrial pressure and sphericity, and determine the characteristics of the patients for whom atrial sphericity was most highly predictive. METHODS: All 148 non-valvular AF patients (57±11 years, 121 men, 95 paroxysmal AF [PaAF]) who underwent RFCA were enrolled...
April 4, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28374449/post-mortem-therapy-from-a-subcutaneous-icd-what-is-the-mechanism
#6
Benedict M Wiles, Samantha J Fitzsimmons, Paul R Roberts
No abstract text is available yet for this article.
April 4, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28370137/effect-of-ablation-pattern-on-mechanical-function-in-the-atrium
#7
Thien-Khoi N Phung, Christian B Moyer, Patrick T Norton, John D Ferguson, Jeffrey W Holmes
BACKGROUND: Atrial fibrillation (AF) is often treated with catheter ablation, which induces scar formation to isolate misfiring electrical signals in the left atrium. Successful ablation restores sinus rhythm at the cost of replacing viable myocardium with scar. The impact of ablation scar on mechanical function of the left atrium is poorly understood. OBJECTIVE: We used a computational model to simulate various ablation patterns and determine their effect on atrial global and regional mechanical function...
March 31, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28370132/infant-sudden-death-mutations-responsible-for-impaired-nav1-5-channel-trafficking-and-function
#8
Ivan Gando, Jace Morganstein, Kundan Jana, Thomas V McDonald, Yingying Tang, William A Coetzee
BACKGROUND: Two genetic variants in SCN5A, encoding the Nav1.5 Na(+) channel α-subunit, were found in a five month-old girl who died suddenly in her sleep. The first variant is a missense mutation, resulting in an amino acid change (Q1832E), which has been described (but not characterized) in a patient with Brugada syndrome. The second is a nonsense mutation that produces a premature stop codon and a C-terminal truncation (R1944Δ). METHODS AND RESULTS: To investigate their functional relevance with patch clamp experiments in transfected HEK293 cells...
March 31, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28369968/asystole-during-pacemaker-magnet-application
#9
James E Ip, Todd J Liu, Carol L Chen, Bruce B Lerman
Pacemaker magnet application during surgery for patients who are pacemaker-dependent is often utilized to avoid peri-operative inhibition from electromagnetic interference. We present a case during which such routine magnet use resulted in an unexpected response and discuss the limitations and nuances of this common practice. This article is protected by copyright. All rights reserved.
March 31, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28369957/extraction-of-looped-transvenous-pacing-leads-to-reduce-tricuspid-regurgitation
#10
Jay A Montgomery, Christopher R Ellis, George H Crossley
Transvenous leads are a known source of iatrogenic tricuspid regurgitation. It is commonly held that extraction of chronic pacing and defibrillator leads will not reduce this, due to the inevitable trauma to the valve associated with the procedure. We demonstrate three cases of clinically significant reductions in tricuspid regurgitation after extraction of leads that were looped across the tricuspid valve. This article is protected by copyright. All rights reserved.
March 31, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28349586/transfemoral-access-when-superior-venous-approach-is-not-feasible-equals-overall-success-of-permanent-pacemaker-implantation-ten-year-series
#11
Juan J García Guerrero, Joaquín Fernández de la Concha Castañeda, Manuel Doblado Calatrava, Ángel Redondo Méndez, Manuel Lázaro Medrano, Antonio Merchán Herrera
BACKGROUND: When permanent pacemaker implantation is not possible or advisable via superior venous access (i.e., axillary or subclavian veins), safe and feasible surgical alternatives are required. The femoral approach is relatively unknown and seldom studied. This single-centre study analysed 10-year outcomes of a femoral implantation approach. METHODS: Data about the implantation procedure (indication, approach, lead and pacemaker models, complications), patient characteristics (age, sex, medications, comorbidities), and follow-up were analysed for all permanent pacemaker implantations using the femoral approach between June 2001 and June 2011...
March 28, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28349549/multiple-narrow-complex-tachycardias-what-are-the-mechanisms
#12
Ghassen Cheniti, Nathaniel Thompson, Arnaud Denis, Elvis Teijeira, Thomas Pambrun, Michel Haissaguerre, Nicolas Derval
No abstract text is available yet for this article.
March 28, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28345216/response-to-letter-to-the-editor-on-shock-anxiety-among-japanese-implantable-cardioverter-defibrillator-patients
#13
LETTER
Jessica Ford
No abstract text is available yet for this article.
March 27, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28345212/cardiac-iodine-123-metaiodobenzylguanidine-scintigraphy-may-be-useful-to-identify-pathologic-from-physiologic-sinus-bradycardia
#14
Akihiro Sunaga, Masaharu Masuda, Masashi Fujita, Osamu Iida, Takashi Kanda, Yasuhiro Matsuda, Takakazu Morozumi, Toshiaki Mano, Masaaki Uematsu
BACKGROUND: Sinus bradycardia includes pathologic sick sinus syndrome (SSS) and physiologic bradycardia such as athletes' heart. Pacemaker implantation is indicated for patients with symptomatic SSS; however, the indication remains difficult to determine in those with mild and/or unspecific symptoms. The sympathetic tone is increased in response to reduced cardiac output in SSS, whereas excessive vagal tone has been seen in physiological bradycardia. We sought to determine if cardiac iodine-123-metaiodobenzylguanidine scintigraphy ((123) I-MIBG) was useful in differentiating pathologic from physiologic sinus bradycardia...
March 27, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28345170/trigger-factors-and-consequence-factors-of-shock-therapy-in-japanese-patients-with-implantable-cardioverter-defibrillator
#15
LETTER
Yusuke Kondo, Marehiko Ueda, Kazuo Miyazawa, Masahiro Nakano, Miyo Nakano, Tomohiko Hayashi, Yoshio Kobayashi
We read with great interest "The Florida Shock Anxiety Scale (FSAS) for Patients with Implantable Cardioverter Defibrillators: Testing Factor Structure, Reliability, and Validity of a Previously Established Measure" by Ford et al.(1) published in Pacing and Clinical Electrophysiolosy. FSAS was designed to provide a quantitative measure of implantable cardioverter defibrillator (ICD) shock-related distress, including trigger factors of device firing (e.g., fearing sexual activity) and consequence factors of device firing (e...
March 27, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28345131/effect-of-botulinum-toxin-on-inducibility-and-maintenance-of-atrial-fibrillation-in-ovine-myocardial-tissue
#16
Alireza Nazeri, Anand V Ganapathy, Ali Massumi, Mehran Massumi, Egemen Tuzun, Raymond Stainback, Ana-Maria Segura, Macarthur A Elayda, Mehdi Razavi
BACKGROUND: Aberrant vagal stimulation may promote the generation and propagation of atrial fibrillation (AF). Researchers have suggested that botulinum toxin (BTX), a neurotoxin that decreases neural vagal stimulation, may decrease the incidence of postoperative AF. The exact electrophysiologic mechanism underlying the observations and histopathologic alterations associated with BTX are unclear. OBJECTIVE: To investigate the electrophysiologic, functional, and histopathologic effects of BTX on fibrillation induction in ovine atria...
March 27, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28295438/intermittent-failure-of-ventricular-pacing-what-is-the-mechanism
#17
Aditya Saini, Bruce S Stambler, Jason S McConnell, Kenneth A Ellenbogen
A 50 year old man with a past medical history of Tetralogy of Fallot and status post surgical repair at age 2 was found to have complete heart block with a ventricular escape rhythm of 37 beats per minute (bpm) on an electrocardiogram (ECG) performed during his annual physical exam. This article is protected by copyright. All rights reserved.
March 15, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28295442/cremation-of-leadless-pacemaker
#18
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., MN) 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. This article is protected by copyright...
March 11, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28295425/prophylactic-atropine-administration-prevents-vasovagal-response-induced-by-cryoballoon-ablation-in-patients-with-atrial-fibrillation
#19
Liping Sun, Jian-Zeng Dong, Xin DU, Rong Bai, Songnan Li, Mohamed Salim, Chang-Sheng Ma
BACKGROUND: Cryoballoon ablation of pulmonary vein (PV) ostia often induces a vagal response.This prospective study was designed to assess the effectiveness of prophylactic intravenous administration of atropine on hemodynamic impairment induced by cryoballoon ablation in patients with atrial fibrillation. METHODS: Twenty-five patients with paroxysmal atrial fibrillation undergoing cryoballoon ablation were prospectively enrolled and assigned to one of two groups...
March 11, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28294363/an-innovation-in-pacemaker-lead-implantation-via-persistent-left-superior-vena-cava-the-3d-alpha-curve-stylet
#20
Jahangir Rashid Beig, Mohd Iqbal Dar, Nisar A Tramboo, Imran Hafeez, Ajaz A Lone, Hilal A Rather
Persistent left superior vena cava (PLSVC) draining into coronary sinus is typically detected incidentally during transcatheter interventions utilizing left subclavian venous approach. In our experience, we have encountered this anomaly on a few occasions and in all these cases we successfully implanted leads in the right ventricle (RV) by shaping the stylet into a 'U-shaped' or 'pigtail shaped' curve. Herein, we report a case of an adult male who underwent successful dual chamber pacemaker implantation via PLSVC through left axillary venous approach...
March 11, 2017: Pacing and Clinical Electrophysiology: PACE
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