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Journal of Arrhythmia

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https://www.readbyqxmd.com/read/28217236/reply-takotsubo-syndrome-and-polymorphic-ventricular-tachycardia-the-chicken-or-the-egg
#1
Rintaro Hojo, Seiji Fukamizu, Masayasu Hiraoka
No abstract text is available yet for this article.
February 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/28217235/electrophysiologic-similarities-of-overdose-between-digoxin-and-bufadienolides-found-in-a-chinese-aphrodisiac
#2
Maxwell Bressman, Daniel Repplinger, William Slater, Mitchell Patt
Classically derived from toad venom, bufadienolides are a group of cardioactive steroids with properties similar to digoxin. Some traditional Chinese medications, including several aphrodisiacs, contain bufadienolides. Owing to their physiologic similarities to digoxin, bufadienolides have been shown to produce a toxic profile similar to that of digoxin and there have been multiple case reports of the use of these aphrodisiacs resulting in death. This report will describe a case that illustrates the electrophysiologic similarities between bufadienolide toxicity and digoxin toxicity as well as the treatment of bufadienolide toxicity...
February 2017: Journal of Arrhythmia
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
#3
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
https://www.readbyqxmd.com/read/28217233/bidirectional-ventricular-tachycardia-in-cardiac-sarcoidosis
#4
Mina M Benjamin, Kevin Hayes, Michael E Field, Melvin M Scheinman, Kurt S Hoffmayer
A 73-year-old man with history of pulmonary sarcoidosis was found to have runs of non-sustained bidirectional ventricular tachycardia (BVT) with two different QRS morphologies on a Holter monitor. Cardiac magnetic resonance delayed gadolinium imaging revealed a region of patchy mid-myocardial enhancement within the left ventricular basal inferolateral myocardium. An 18-fluorodeoxyglucose positron emission tomography (FDG-PET) showed increased uptake in the same area, consistent with active sarcoid, with no septal involvement...
February 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/28217232/successful-percutaneous-epicardial-catheter-ablation-of-ventricular-tachycardia-arising-from-the-crux-of-the-heart-in-a-patient-with-prior-coronary-artery-bypass-grafting
#5
Naoki Yoshida, Takumi Yamada
A 63-year-old man with a history of remote inferior myocardial infarction and coronary artery bypass grafting (CABG) underwent catheter ablation of ventricular tachycardia (VT). Epicardial catheter ablation of the VT was successful at the crux of the heart despite limited mapping within the pericardial space due to pericardial adhesion. Percutaneous subxiphoidal pericardial approach is usually impossible in patients with a history of open heart surgery due to pericardial adhesions. This report suggested that epicardial VT arising from the crux of the heart could be successfully treated by catheter ablation via subxiphoidal pericardial approach despite pericardial adhesions complicated by prior CABG...
February 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/28217231/successful-intermuscular-implantation-of-subcutaneous-implantable-cardioverter-defibrillator-in-a-japanese-patient-with-pectus-excavatum
#6
Yusuke Kondo, Marehiko Ueda, Joachim Winter, Miyo Nakano, Masahiro Nakano, Masayuki Ishimura, Kazuo Miyazawa, Kaoru Tateno, Yoshio Kobayashi
The entirely subcutaneous implantable cardioverter-defibrillator (ICD) system was developed to provide a life-saving defibrillation therapy that does not affect the heart and vasculature. The subcutaneous ICD is preferred over the transvenous ICD for patients with a history of recurrent infection presenting major life-threatening rhythms. In this case report, we describe the first successful intermuscular implantation of a completely subcutaneous ICD in a Japanese patient with pectus excavatum. There were no associated complications with the device implantation or lead positioning...
February 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/28217230/red-cell-distribution-width-and-all-cause-mortality-in-patients-with-atrial-fibrillation-a-cohort-study
#7
Walid Saliba, Ofra Barnett-Griness, Gad Rennert
BACKGROUND: Increased red cell distribution width (RDW), a measure of red cell size variability, has been associated with increased mortality in multiple cardiovascular diseases. However, whether RDW is associated with increased mortality in patients with atrial fibrillation remains unknown. METHODS: Using the computerized database of the largest health maintenance organization in Israel, we identified a cohort of adults with atrial fibrillation diagnosed before January 1, 2012...
February 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/28217229/evaluation-of-the-characteristics-of-rotational-activation-at-high-dominant-frequency-and-complex-fractionated-atrial-electrogram-sites-during-atrial-fibrillation
#8
Koji Kumagai, Kentaro Minami, Daisuke Kutsuzawa, Shigeru Oshima
BACKGROUND: High-dominant frequency (DF) and continuous complex fractionated atrial electrogram (CFAE) sites as surrogates for localized sources maintaining atrial fibrillation (AF) are potential AF ablation targets. This study aimed to evaluate the characteristics of a rotational activation at high-DF and continuous CFAE sites in AF patients. METHODS: Thirty-two consecutive AF patients (5 paroxysmal and 27 non-paroxysmal) underwent ablation using the NavX system...
February 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/28217228/spatiotemporal-characteristics-of-atrial-fibrillation-electrograms-a-novel-marker-for-arrhythmia-stability-and-termination
#9
Shivshankar Thanigaimani, Anthony G Brooks, Pawel Kuklik, Darragh J Twomey, Samantha Franklin, Erik Noschka, Darius Chapman, Rajeev K Pathak, Rajiv Mahajan, Prashanthan Sanders, Dennis H Lau
BACKGROUND: Sequentially mapped complex fractionated atrial electrograms (CFAE) and dominant frequency (DF) sites have been targeted during catheter ablation for atrial fibrillation (AF). However, these strategies have yielded variable success and have not been shown to correlate consistently with AF dynamics. Here, we evaluated whether the spatiotemporal stability of CFAE and DF may be a better marker of AF sustenance and termination. METHODS: Eighteen sheep with 12 weeks of "one-kidney, one-clip" hypertension underwent open-chest studies...
February 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/28217227/cardiac-conduction-defects-and-brugada-syndrome-a-family-with-overlap-syndrome-carrying-a-nonsense-scn5a-mutation
#10
Hisaaki Aoki, Yoshihide Nakamura, Seiko Ohno, Takeru Makiyama, Minoru Horie
BACKGROUND: Phenotypes often differ even within family members carrying the same SCN5A mutation. We aimed to evaluate the genetic modifiers in a family with Brugada syndrome (BrS) and sick sinus syndrome (SSS) with an SCN5A mutation that causes the truncated alpha-subunit of cardiac Na channel protein. METHODS: To detect the genetic modifiers, we performed targeted panel sequencing of the coding region of 46 genes that are related to primary arrhythmia syndrome, by using a bench-top, next generation sequencer...
February 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/28217226/functional-characteristics-of-left-ventricular-synchronization-via-right-ventricular-outflow-tract-pacing-detected-by-two-dimensional-strain-echocardiography
#11
Yasutaka Hirayama, Yuichiro Kawamura, Nobuyuki Sato, Tatsuya Saito, Hideichi Tanaka, Yasuaki Saijo, Kenjiro Kikuchi, Katsumi Ohori, Naoyuki Hasebe
BACKGROUND: Recently, due to the detrimental effects on the ventricular function associated with right ventricular apical (RVA) pacing, right ventricular septal (RVS) pacing has become the preferred pacing method. However, the term RVS pacing refers to both right ventricular outflow-tract (RVOT) and mid-septal (RVMS) pacing, leading to a misinterpretation of the results of clinical studies. The purpose of this study, therefore, was to elucidate the functional differences of RVA, RVOT, and RVMS pacing in patients with atrioventricular block...
February 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/28217225/immediate-discontinuation-of-ablation-during-pulmonary-vein-isolation-remarkably-decreases-the-incidence-of-esophageal-thermal-lesions-even-when-using-steerable-sheaths
#12
Norikazu Watanabe, Yuta Chiba, Yoshimi Onishi, Shiro Kawasaki, Yumi Munetsugu, Yoshimasa Onuma, Hiroyuki Itou, Tatsuya Onuki, Yoshino Minoura, Taro Adachi, Mitsuharu Kawamura, Taku Asano, Kaoru Tanno, Yutarou Kubota, Kazuo Konishi, Youichi Kobayashi
BACKGROUND: Left atrial-esophageal fistulas (LAEFs) are serious complications with high mortality after atrial fibrillation radiofrequency ablation (AFRA). Decreasing the incidence of esophageal thermal lesions (EsoTLs) that may lead to LAEFs is important. The aim of this study was to suppress EsoTL development and determine the appropriate alarm setting for a temperature-monitoring probe by using steerable sheath (STS) methods. METHODS: We enrolled 82 consecutive patients (mean, 61...
February 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/28217224/mortality-and-predictors-of-appropriate-implantable-cardioverter-defibrillator-therapy-in-japanese-patients-with-multicenter-automatic-defibrillator-implantation-trial-ii-criteria
#13
Yoshimori An, Kenji Ando, Yoshimitsu Soga, Akihiro Nomura, Michio Nagashima, Kentaro Hayashi, Yu Makihara, Masato Fukunaga, Ken-Ichi Hiroshima, Masakiyo Nobuyoshi, Masahiko Goya
BACKGROUND: Data regarding long-term mortality and factors influencing appropriate therapies in Japanese patients with implantable cardioverter defibrillators (ICD), who satisfy the Multicenter Automatic Defibrillator Implantation Trial II (MADIT II) criteria for primary prevention, remain scarce. METHODS: A total of 118 consecutive patients who underwent ICD implantation without any prior ventricular arrhythmic event, from January 2000 to December 2012, were enrolled based on the MADIT II criteria: left ventricular ejection fraction (LVEF) of ≤30% with ischemic heart disease and at least 4 weeks after a myocardial infarction...
February 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/28217223/long-term-reliability-of-sweet-tip-type-screw-in-leads
#14
Asuka Takano, Gaku Sekita, Minako Watanabe, Hiroshi Mukaida, Sayaka Komatsu, Haruna Tabuchi, Hidemori Hayashi, Takashi Tokano, Masataka Sumiyoshi, Yuji Nakazato, Hiroyuki Daida
BACKGROUND: Active fixation leads have provided stable atrial and ventricular pacing; however, long-term follow-up data have not been satisfactory. The purpose of this study was to investigate the long-term reliability of active fixation leads and their electrical characteristic stability. METHODS: A total of 1196 pacing leads were implanted in 830 patients consecutively between 2002 and 2013. In this retrospective study, we were able to trace 1092 leads in 750 patients to investigate the prognosis of implanted leads...
February 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/28217222/non-vitamin-k-antagonist-oral-anticoagulants-versus-warfarin-for-cardioversion-of-atrial-fibrillation-in-clinical-practice-a-single-center-experience
#15
Naoki Shibata, Itsuro Morishima, Kenji Okumura, Yasuhiro Morita, Kensuke Takagi, Ruka Yoshida, Hiroaki Nagai, Toshiro Tomomatsu, Yoshihiro Ikai, Kazushi Terada, Kazuhito Tsuzuki, Hideyuki Tsuboi, Takahito Sone, Toyoaki Murohara
BACKGROUND: Anticoagulation therapy with the vitamin K antagonist (VKA) warfarin has been demonstrated to reduce thromboembolic risk after electrical cardioversion (ECV). However, data concerning ECV with non-VKA oral anticoagulants (NOACs) is limited. The objective of this study was to determine the efficacy and safety of NOACs in patients undergoing ECV in a real-world clinical practice at a single center in Japan. METHODS: We retrospectively analyzed the data of 406 consecutive patients who underwent ECV for atrial fibrillation (AF) or flutter under anticoagulation with one of the three NOACs (n=149) or with a VKA (n=257)...
February 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/28217221/byung-gyu-kim-et-al-reduced-systemic-vascular-resistance-is-the-underlying-hemodynamic-mechanism-in-nitrate-stimulated-vasovagal-syncope-during-head-up-tilt-table-test
#16
Arttu Eräranta, Antti Tikkakoski, Ilkka H Pörsti
No abstract text is available yet for this article.
February 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/28217220/identification-and-management-of-right-ventricular-perforation-using-pacemaker-and-cardioverter-defibrillator-leads-a-case-series-and-mini-review
#17
REVIEW
Mohammad Ali Akbarzadeh, Reza Mollazadeh, Salma Sefidbakht, Soraya Shahrzad, Negar Bahrololoumi Bafruee
Right ventricular perforation is a rare but serious complication of permanent pacemaker and implantable cardioverter-defibrillator implantation, with a reported prevalence rate of 0.1-6%. Generally, there is a high incidence of asymptomatic lead perforation with otherwise normal function. Some patients present with a stabbing chest pain and shortness of breath or pacemaker malfunction. However, in some cases, tamponade or adjacent tissue injury may be seen. The exact risk factors for lead perforation are not yet clear...
February 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/27920839/is-it-truly-atrial-tachycardia
#18
Yoshiaki Kaneko, Fumio Suzuki
No abstract text is available yet for this article.
December 2016: Journal of Arrhythmia
https://www.readbyqxmd.com/read/27920838/successful-resynchronization-by-permanent-his-bundle-pacing-in-a-patient-with-pacing-induced-cardiomyopathy
#19
Yoji Iida, Tomoaki Izawa, Chikara Kobari, Toru Yatsuhashi, Nobuyuki Makishima
Right ventricular (RV) pacing has been reported to result in ventricular dyssynchrony, heart failure, and increased mortality. Pacing associated deterioration of left ventricular (LV) systolic function has been termed pacing-induced cardiomyopathy (PICM). While upgrading to biventricular pacing (BiVP) is an effective therapy for PICM, permanent His-bundle pacing (HBP) can be a physiological alternative to BiVP. We present a patient with PICM who responded dramatically to permanent HBP.
December 2016: Journal of Arrhythmia
https://www.readbyqxmd.com/read/27920837/temporal-sinus-node-modification-by-high-dose-continuous-intravenous-administration-of-landiolol-in-a-patient-with-persistent-inappropriate-sinus-tachycardia
#20
Yuichi Hori, Shiro Nakahara, Naofumi Anjo, Yoshihiko Sakai, Isao Taguchi
A 20-year-old woman underwent an electrophysiological study for drug-resistant persistent inappropriate sinus tachycardia (IST). Use of a high-dose continuous intravenous administration of landiolol, a short-acting beta-adrenoreceptor blocker, made the patient׳s heart rate suddenly drop with a slight change in the P-wave morphology. Three-dimensional right atrial (RA) activation mapping revealed that the earliest activation site moved 8 mm to a lower anterior site around the high lateral RA. Radiofrequency energy applied to the earliest activation site during tachycardia was successful...
December 2016: Journal of Arrhythmia
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