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Journal of Arrhythmia

Katsunori Okajima, Tomoyuki Nakanishi, Hirotoshi Ichibori, Takeaki Shirai, Makoto Kadotani, Hiroki Shimizu, Yoshio Onishi, Kohei Yamashiro
A 51-year-old male with dextrocardia and situs inversus underwent catheter ablation for paroxysmal atrial fibrillation. Because the procedure through the trans-septal approach was impossible due to the inferior vena cava continuity with azygos vein, we performed pulmonary vein isolation using magnetic navigation system through the retrograde trans-aortic approach. Superior and inferior left-sided and superior right-sided pulmonary veins could be isolated which was confirmed by the ablation catheter. The patient was free from atrial fibrillation episode at the 12 months follow-up except only one palpitation episode lasting nearly 12 hours at 9 months after the ablation...
October 2018: Journal of Arrhythmia
Yuichi Hori, Shiro Nakahara, Naoki Nishiyama, Reiko Fukuda, Noritaka Toratani, Yoshihiko Sakai, Isao Taguchi
A 60-year-old male experienced an inappropriate shock from an implantable cardioverter-defibrillator (ICD) because of oversensing of pectoral myopotentials. Battery depletion was also observed, and a generator change was performed. A single-chamber ICD (VENTAK PRIZM II 1860) was changed to a new ICD (INCEPTA VR F161). The myopotentials were clearly eliminated by the difference in the band pass filter (PRIZM; 21-171 Hz, INCEPTA; 20-85 Hz), but unfortunately, new noise was documented 4 years later. The utility of the bandpass filter for preventing oversensing of myopotentials was observed, but the limitation of its use for long-term follow-up was also indicated...
October 2018: Journal of Arrhythmia
Takatsugu Kajiyama, Hitoshi Hachiya, Yoshito Iesaka
An 18-year-old man without organic heart disease underwent catheter ablation for frequent monomorphic ventricular ectopic beats(VEBs). The origin of the VEB was presumed located on the left coronary cusp(LCC) regarding his electrocardiography. Local activation in the right ventricular outflow tract was not so early. On the LCC, four different prepotentials were obtained by slight relocation of the catheter. Finally, on the site with positive discrete prepotential recorded on the distal electrodes, an application of radiofrequency current immediately eliminated the VEB...
October 2018: Journal of Arrhythmia
Hiroki Konishi, Koji Fukuzawa, Shumpei Mori, Kunihiko Kiuchi, Ken-Ichi Hirata
A 69-year-old man, who had undergone surgery for mitral and tricuspid regurgitation with the Maze procedure for paroxysmal atrial fibrillation, was admitted with an episode of syncope due to sick sinus syndrome. Three days after implantation of a dual-chamber pacemaker (Accent MRI™, St. Jude Medical Inc.,), ventricular pacing on T-wave was recorded multiple times. St. Jude Medical Inc. pacemakers have a unique additional algorithm, called premature ventricular contraction response, related to preventing pacemaker-mediated tachycardia...
October 2018: Journal of Arrhythmia
Amanda Quattrocelli, Janet Lang, Andrew Davis, Andreas Pflaumer
Background: Supraventricular tachycardia is a group of rhythm disturbances that affect 1 in 300-1200 Australian children annually. The differentiation of supraventricular tachycardia (SVT) symptoms and age of onset according to their subtype is not well understood in the pediatric population. Most studies rely on ECG criteria only to characterize the subtype of the SVT, which is not applicable to all subtypes. The purpose of this study was to identify the symptoms and ages of onset of SVT subtypes, and to analyze whether ethnicity or severity correlated with the SVT subtype confirmed in an invasive Electrophysiology (EP) study...
October 2018: Journal of Arrhythmia
Pattara Rattanawong, Tanawan Riangwiwat, Pakawat Chongsathidkiet, Wasawat Vutthikraivit, Nath Limpruttidham, Narut Prasitlumkum, Napatt Kanjanahattakij, Chanavuth Kanitsoraphan
Background: Vasovagal syncope (VVS) is defined by transient loss of consciousness with spontaneous rapid recovery. Recently, a closed-loop stimulation pacing system (CLS) has shown superior effectiveness to conventional pacing in refractory VVS. However, systematic review and meta-analysis has not been performed. We assessed the impact of CLS implantation and reduction in recurrent VVS events by a systematic review and a meta-analysis. Methods: We comprehensively searched the databases of MEDLINE and EMBASE from inception to September 2017...
October 2018: Journal of Arrhythmia
Belén Alvarez-Alvarez, Javier García-Seara, Jose L Martínez-Sande, Moisés Rodríguez-Mañero, Xesús A Fernández López, Laila González-Melchor, Rosa M Agra Bermejo, Diego Iglesias-Alvarez, Francisco Gude Sampedro, Carla Díaz-Louzao, José R González-Juanatey
Background: Cardiac resynchronization therapy (CRT) is indicated in symptomatic heart failure (HF) patients after achieving optimal medical therapy (OMT). However, many patients may not be under OMT when the CRT device is implanted. Here, we evaluate the long-term benefits of CRT in symptomatic HF patients receiving or not OMT. Methods: We investigated the effect of OMT on HF developing or death in 328 consecutive patients with a CRT device implanted between 2005 and 2015 in a single tertiary center...
October 2018: Journal of Arrhythmia
Masaya Watanabe, Hisashi Yokoshiki, Hirofumi Mitsuyama, Kazuya Mizukami, Taro Tenma, Rui Kamada, Masayuki Takahashi, Yoshiro Matsui, Toshihisa Anzai
Background: As the transvenous defibrillator lead is fragile and its failure may cause a life-threatening event, reliable insertion techniques are required. While the extrathoracic puncture has been introduced to avoid subclavian crush syndrome, the reports on the long-term defibrillator lead survival using this approach, especially the comparison with the cephalic cutdown (CD), remain scarce. We aimed to evaluate the long-term survival of the transvenous defibrillator lead inserted by the extrathoracic subclavian puncture (ESCP) compared with CD...
October 2018: Journal of Arrhythmia
Chun Yuan Khoo, John Carson Allen, Shaw Yang Chia, Laura Lihua Chan, Choon Pin Lim, David Sim, Chi Keong Ching
Background: There have been conflicting data regarding the risk of sudden cardiac death (SCD) in Asian population with reduced left ventricular ejection fraction (LVEF). We aim to study mortality outcome and its risk predictors in patients with reduced LVEF who declined an implantable cardioverter defibrillator (ICD) implantation and assess whether current ICD guidelines for primary prevention are applicable to the population in Singapore. Methods: This prospective observational study involved 240 consecutive patients who fulfilled the ACC/AHA/HRS criteria for ICD implantation for primary prevention of SCD but declined ICD implantation...
October 2018: Journal of Arrhythmia
Daigo Nagahara, Takefumi Fujito, Atsushi Mochizuki, Shinya Shimoshige, Akiyoshi Hashimoto, Tetsuji Miura
Background: Implantable cardioverter defibrillator (ICD) and cardiac resynchronization with a defibrillator (CRT-D) are established therapies for secondary prevention of sudden cardiac death (SCD) in patients with structural heart disease (SHD), but the rates of subsequent ICD/CRT-D therapy widely differ among patients with SHD. The aim of this study was to determine clinical factors associated with appropriate therapy for preventing SCD in patients with SHD. Methods: We enrolled 147 patients with SHD (mean age, 59 ± 15 years; mean ejection fraction [EF], 45 ± 15%) who underwent ICD/CRT-D implantation for secondary prevention of SCD (ischemic heart disease, n = 50; nonischemic heart disease, n = 97)...
October 2018: Journal of Arrhythmia
Kohei Ishibashi, Yoshinobu Eishi, Nobuhiro Tahara, Masanori Asakura, Naka Sakamoto, Kazufumi Nakamura, Yoichi Takaya, Tomohisa Nakamura, Yoshikazu Yazaki, Tetsuo Yamaguchi, Koko Asakura, Toshihisa Anzai, Teruo Noguchi, Satoshi Yasuda, Fumio Terasaki, Toshimitsu Hamasaki, Kengo Kusano
Background: Cardiac sarcoidosis (CS) is a noncaseating granulomatous disease of unknown etiology. Lifelong immunosuppressive therapy, most frequently using corticosteroids, is a standard therapy to control hypersensitivity of immune reactions and prevent inflammation. However, it sometimes causes various systemic adverse effects and requires dose escalation. Thus, additional therapy may be required for the treatment of this disease. Recently, Propionibacterium acnes ( P. acnes ) was reported as one of the etiologic agents of CS, indicating that antibacterial drugs (ABD) may be effective for the treatment of CS...
October 2018: Journal of Arrhythmia
Ryuta Watanabe, Yasuo Okumura, Koichi Nagashima, Kazuki Iso, Keiko Takahashi, Masaru Arai, Yuji Wakamatsu, Sayaka Kurokawa, Kimie Ohkubo, Toshiko Nakai, Shunichi Yoda, Ichiro Watanabe, Atsushi Hirayama, Kazumasa Sonoda, Toshimasa Tosaka
Background: Limited data exist on indicators of durable pulmonary vein isolation (PVI) undergoing cryoballoon ablation (CBA) for atrial fibrillation (AF). We investigated whether balloon temperature and time to PVI can be used to predict early PV reconduction (EPVR), including residual PV conduction and adenosine triphosphate-induced dormant conduction and the relation between touch-up ablation of EPVR sites and mid-term recurrence of AF. Methods: We obtained procedural and outcome data from the records of 130 consecutive patients who underwent CBA and followed up for 13...
October 2018: Journal of Arrhythmia
Takayuki Otsuka, Koichi Sagara, Takuto Arita, Naoharu Yagi, Shinya Suzuki, Takanori Ikeda, Takeshi Yamashita
Background: Two methods for testing inducibility of atrial fibrillation (AF)-atrial pacing and isoproterenol infusion-have been proposed to determine the endpoint of catheter ablation. However, the utility of the combination for testing electrophysiological inducibility (EPI) and pharmacological inducibility (PHI) is unclear. Methods: After pulmonary vein isolation (PVI), inducibility of atrial tachyarrhythmia was assessed with the dual methods in 291 consecutive patients with AF (65% paroxysmal) undergoing initial catheter ablation...
October 2018: Journal of Arrhythmia
Svetlana Ivanovna Sazonova, Julia Nikolaevna Ilushenkova, Roman Efimovich Batalov, Anna Mihaylovna Gusakova, Julia Vladimirovna Saranchina, Julia Viktorovna Rogovskaya, Sergey Valentinovich Popov
Background: Atrial fibrillation (AF) is one of the widest spread forms of arrhythmia, which is associated with the increased mortality and thromboembolic complications. To date, the involvement of renin-angiotensin-aldosterone system and immunomediators of inflammation into the mechanisms of development and maintenance of isolated AF is not clear. Specificity of their changes with respect to the latent myocarditis at AF is not proved. Methods: In 96 patients with persistent isolated atrial fibrillation (IsAF), scheduled for radiofrequency ablation and endomyocardial biopsy (EMB), and in 20 healthy volunteers (HVT), levels of plasma tumor necrosis factor-α (TNF-α), interleukin (IL)-1β, IL-6, IL-8, IL-10, fatty acid-binding protein (FABP), neopterin, C-reactive protein (CRP) were determined by ELISA, level of aldosterone and the renin activity were determined by radioimmunoassay...
October 2018: Journal of Arrhythmia
Mohammad Alasti, Colin Machado, Karthikeyan Rangasamy, Logan Bittinger, Stewart Healy, Emily Kotschet, David Adam, Jeff Alison
Pacemakers can be directly involved in initiating or sustaining different forms of arrhythmia. These can cause symptoms such as dyspnea, palpitations, and decompensated heart failure. Early detection of these arrhythmias and optimal pacemaker programming is pivotal. The aim of this review article is to summarize the different types of pacemaker-mediated arrhythmias, their predisposing factors, and mechanisms of prevention or termination.
October 2018: Journal of Arrhythmia
Ahmed AlTurki, Thao Huynh, Ahmed Dawas, Hussain AlTurki, Jacqueline Joza, Jeff S Healey, Vidal Essebag
A significant proportion of patients' experience recurrence of atrial fibrillation (AF) despite pulmonary venous isolation (PVI), especially those with persistent AF. Isolation of the left atrial appendage (LAA) may reduce AF recurrence. The aim of this study was to assess the efficacy of LAA isolation in addition to PVI compared with PVI alone. We conducted a comprehensive search of electronic databases, up to April 21st, 2017, for all studies comparing the effect LAA electrical isolation or ligation in addition to PVI, as opposed to PVI alone, on the recurrence of atrial fibrillation after catheter ablation...
October 2018: Journal of Arrhythmia
Sunu Budhi Raharjo, Rido Maulana, Irma Maghfirah, Fatimah Alzahra, Agnes Dinar Putrinarita, Dicky A Hanafy, Yoga Yuniadi
Mutations in the gene encoding the main cardiac sodium channel (SCN5A) are the commonest genetic cause of Brugada syndrome (BrS). However, the effect of SCN5A mutations on the outcomes of ventricular fibrillation (VF) and syncope remains uncertain. To clarify this relationship, a meta-analysis was performed. A comprehensive search was conducted to identify all eligible studies from PubMed, MEDLINE, EBSCO, ProQuest, Science Direct, Clinical Key, and Cochrane database for cohort studies of BrS populations that had been systematically tested for SCN5A mutations...
October 2018: Journal of Arrhythmia
Priyank Shah, Edward Koomson
No abstract text is available yet for this article.
August 2018: Journal of Arrhythmia
Yuriko Sato, Yoshiyasu Aizawa, Taishi Fujisawa, Shogo Ito, Kousuke Katano, Nozomi Fuse, Akira Miyabe, Kimihiro Osada, Ryuuma Ishihara, Atushi Tosaka, Toshitake Tamamura, Taisuke Mizumura, Youichi Sugimura, Kazuaki Nakajima, Yoshinori Katsumata, Takahiko Nishiyama, Takehiro Kimura, Yoshiko Furukawa, Seiji Takatsuki, Kenjiro Kosaki, Keiichi Fukuda
A 50-year-old woman visited the emergency department with a high fever due to pneumonia. Incessant monomorphic ventricular tachycardia occurred and was terminated by intravenous lidocaine. Her ECG during sinus rhythm demonstrated ST segment elevation suggestive of Brugada syndrome (BS). An intensive examination could not detect any structural disease, and typical coved-type ST elevation was unmasked by a pilsicainide injection leading to a diagnosis of BS. An ICD was implanted for secondary prevention of ventricular arrhythmia...
August 2018: Journal of Arrhythmia
Eitaro Fujii, Satoshi Fujita, Yoshihiko Kagawa, Masaaki Ito
A 64-year-old man with an atrial septal defect was referred for HotBalloon ablation of symptomatic drug-resistant paroxysmal atrial fibrillation. Pulmonary vein (PV) isolation was achieved using a SATAKE HotBalloon ablation system, which was inserted into the left atrium through the deflectable guiding sheath via the atrial septal defect. During ablation of the right superior pulmonary vein carina, the HotBalloon dropped to the left atrium. Hemoptysis and respiratory failure was then observed, and the patient was intubated and controlled under ventilator...
August 2018: Journal of Arrhythmia
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