Criteria for short QT interval based on a new QT-heart rate adjustment formula
Conclusions Based on the new spline formula, a short QTc is defined at the first percentile, and is less than 380ms in both men and women. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - May 6, 2017 Category: Cardiology Source Type: research

Subacute pneumothorax contralateral to the venous access site associated with atrial lead perforation in a patient who was receiving corticosteroid therapy
We report a rare case of subacute contralateral pneumothorax due to a screw-in atrial lead perforation that occurred after dual-chamber pacemaker implantation in a patient who was receiving steroid therapy. The pneumothorax disappeared, and no recurrence was observed during follow-up with close observation alone. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - May 5, 2017 Category: Cardiology Source Type: research

Impact of baseline renal function on all-cause mortality in patients who underwent cardiac resynchronization therapy: A systematic review and meta-analysis
Conclusion Baseline renal dysfunction has an adverse effect on-all cause mortality in patients who underwent CRT. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - May 1, 2017 Category: Cardiology Source Type: research

Simple and effective solution for diaphragm pacing by that uses the transvenous femoral approach in a patient treated with cardiac resynchronization-defibrillator therapy: The wrapping method
We present the case of a 58-year-old male patient who had diaphragm pacing after CRT with defibrillator implantation. The complication was resolved by using the transvenous femoral approach with the wrapping method. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - April 29, 2017 Category: Cardiology Source Type: research

Adaptive cardiac resynchronization therapy for dilated cardiomyopathy with functional mitral regurgitation
We report the case of a man in his 60s who had dilated cardiomyopathy with severe functional mitral regurgitation. Four years after a cardiac resynchronization therapy (CRT) device with an implantable cardioverter defibrillator was implanted, this device was replaced with an adaptive CRT device because of battery consumption. Seven months after replacement of this device, the left ventricular pacing to right ventricular activation and the atrioventricular delay from automatic adjustments contributed to less functional mitral regurgitation. The findings from our case suggest that optimal CRT, by measuring intracardiac condu...
Source: Journal of Arrhythmia - April 29, 2017 Category: Cardiology Source Type: research

Elongated ascending aorta predicts a short distance between his-bundle potential recording site and coronary sinus ostium
Conclusions Small TOK was associated with longer Ao, larger LVDs, and Ao unfolding. Of these, Ao unfolding was associated with smaller TOK in patients with AVNRT. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - April 27, 2017 Category: Cardiology Source Type: research

Vagal response in cryoballoon ablation of atrial fibrillation and autonomic nervous system: Utility of epicardial adipose tissue location
Conclusions Changes in HRV parameters following ablation were similarly observed in both the groups. EAT volume on the LA-PV junction is helpful for interpretation of VR occurrence and ANS modulation. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - April 24, 2017 Category: Cardiology Source Type: research

Cardiac resynchronization therapy in ischemic and non-ischemic cardiomyopathy
Publication date: Available online 21 April 2017 Source:Journal of Arrhythmia Author(s): Hisashi Yokoshiki, Hirofumi Mitsuyama, Masaya Watanabe, Takeshi Mitsuhashi, Akihiko Shimizu Cardiac resynchronization therapy (CRT) using a biventricular pacing system has been an effective therapeutic strategy in patients with symptomatic heart failure with a reduced left ventricular ejection fraction (LVEF) of 35% or less and a QRS duration of 130ms or more. The etiology of heart failure can be classified as either ischemic or non-ischemic cardiomyopathy. Ischemic etiology of patients receiving CRT is prevalent predominantly in Nort...
Source: Journal of Arrhythmia - April 22, 2017 Category: Cardiology Source Type: research

Initial experience with the subcutaneous implantable cardioverter-defibrillator in a single Japanese center
Conclusions S-ICD implantation appears to provide a viable alternative to transvenous ICD implantation for some Japanese patients. However, we should perform careful follow-up of patients to eliminate inappropriate therapy. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - March 31, 2017 Category: Cardiology Source Type: research

Adenosine-guided radiofrequency catheter ablation of atrial fibrillation: A meta-analysis of randomized control trials
Conclusions Adenosine-guided radiofrequency catheter ablation of atrial fibrillation does not provide additional benefit in terms of freedom of arrhythmia recurrence. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - March 29, 2017 Category: Cardiology Source Type: research

Driving restrictions in patients with implantable cardioverter defibrillators and pacemakers
Publication date: Available online 28 March 2017 Source:Journal of Arrhythmia Author(s): Eiichi Watanabe, Haruhiko Abe, Shigeyuki Watanabe Implantable cardioverter-defibrillators (ICDs) improve the survival in patients at risk of sudden cardiac death. However, these patients have an ongoing risk of sudden incapacitation that may cause harm to individuals and others when driving. Considerable disagreement exists about whether and when these patients should be allowed to resume driving after ICD therapies. This information is critical for the management decisions to avoid future potentially lethal incidents and unnecessary ...
Source: Journal of Arrhythmia - March 28, 2017 Category: Cardiology Source Type: research

Study design of GENERAL (general practitioners and embolism prevention in NVAF patients treated with rivaroxaban: Real-life evidence): A multicenter prospective cohort study in primary care physicians to investigate the effectiveness and safety of rivaroxaban in Japanese patients with NVAF
Conclusion This study will provide important information regarding the effectiveness and safety of rivaroxaban treatment in Japanese patients with NVAF among general practitioners. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - March 8, 2017 Category: Cardiology Source Type: research

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
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. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - March 6, 2017 Category: Cardiology Source Type: research

The tachycardia that outsmarted the SMART
Publication date: Available online 27 February 2017 Source:Journal of Arrhythmia Author(s): David Foo, Pow-Li Chia, Andreas Kucher (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - February 27, 2017 Category: Cardiology Source Type: research

Airway support using a pediatric intubation tube in adult patients with atrial fibrillation: A simple and unique method to prevent heart movement during catheter ablation under continuous deep sedation
Conclusion This unique airway management technique using a pediatric intubation tube for CA procedures performed in adult patients with AF under continuous deep sedation was easy, safe, and effective. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - February 20, 2017 Category: Cardiology Source Type: research

Asystole in focal epilepsy complicating a traumatic subdural hematoma
Publication date: Available online 16 February 2017 Source:Journal of Arrhythmia Author(s): Yuk-Ming Lau, Chi-Hung Lo, Kathy Lai-Fun Lee, Chu-Pak Lau Ictal asystole due to sinus node suppression is a cause of sudden unexplained death in epilepsy. Here, for the first time, we describe a complete atrioventricular nodal block in a patient with non-compressive traumatic subdural hematoma, who developed ictal asystole as a delayed presentation. A leadless VVI pacemaker (ventricular paced, ventricular sensed, and pacing inhibited in response to a sensed beat) was implanted as a preventive measure against seizure-related heart b...
Source: Journal of Arrhythmia - February 16, 2017 Category: Cardiology Source Type: research

Wavefront direction and cycle length affect left atrial electrogram amplitude
Conclusion The rate and direction-dependent reduction of the amplitude of atrial EGMs may explain, in part, the voltage discordance during SR and AF. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - February 13, 2017 Category: Cardiology Source Type: research

Feasibility, safety, and potential demand of emergent brain magnetic resonance imaging of patients with cardiac implantable electronic devices
Conclusions Our study found the potential demand of brain MRI of patients with CIEDs in emergency situations compared with scheduled scanning, which was shown to be feasible and safe for the diagnosis and treatment of an acute stroke. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - February 9, 2017 Category: Cardiology Source Type: research

Intracoronary acetylcholine application as a possible probe inducing J waves in patients with early repolarization syndrome
Publication date: Available online 6 February 2017 Source:Journal of Arrhythmia Author(s): Toru Maruyama, Kazumasa Fujita, Kei Irie, Shouhei Moriyama, Mitsuhiro Fukata Acetylcholine is widely used for a diagnostic provocation test of coronary spasm in patients with vasospastic angina. Acetylcholine usually induces coronary vasodilatation mediated by muscarinic receptor activation, but sometimes it evokes vasoconstriction of coronary arteries where the endothelium is damaged. Early repolarization syndrome is characterized by a J wave observed at the end of the QRS complex in a surface electrocardiogram. The J wave is attri...
Source: Journal of Arrhythmia - February 6, 2017 Category: Cardiology Source Type: research

High-resolution mapping and ablation of recurrent left lateral accessory pathway conduction
We report a case of recurring AP conduction that was finally eliminated using a novel ablation catheter equipped with high-resolution mini-electrodes. Smaller and closer electrodes result in high mapping resolution with less signal averaging and cancellation effects. Owing to improved sensitivity, the new catheter seems effective in detecting fragmented and high frequency signals, thus allowing more effective radiofrequency application and improving ablation success. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - February 3, 2017 Category: Cardiology Source Type: research

Percutaneous renal sympathetic denervation in catecholaminergic polymorphic ventricular tachycardia
Publication date: Available online 28 January 2017 Source:Journal of Arrhythmia Author(s): Tolga Aksu, Erdem Guler Catheter-based renal sympathetic denervation may be an alternative after unsuccessful conventional ablation attempts. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - January 28, 2017 Category: Cardiology Source Type: research

Simulation of ventricular rate control during atrial fibrillation using ionic channel blockers
Conclusions Our simulation results explain why potassium current blockers are not recommended for controlling ventricular rate during AF. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - January 22, 2017 Category: Cardiology Source Type: research

Focal ablation for atrial tachycardia from the double-exit of the Marshall bundle inducing atrial fibrillation
We report the case of a 23-year-old woman with an antiarrhythmic drug-resistant AF induced by two distinct atrial tachycardias (ATs). Focal ablation of these ATs from the double-exit of the Marshall bundle using a three-dimensional map eliminated AF triggering, even though pulmonary vein electrical isolation is the cornerstone for paroxysmal AF. Such mechanisms are important as triggering factors to plan ablation for paroxysmal AF. Focal ablation for triggering and inducing AF, originating from the double-exit of the Marshall bundle may be effective in eliminating AF in young patients. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - January 1, 2017 Category: Cardiology Source Type: research

Current use of direct oral anticoagulants for atrial fibrillation in Japan: Findings from the SAKURA AF Registry
Conclusions Our initial analysis of the SAKURA AF Registry data clarified the real-world use of anticoagulants, which includes DOACs and warfarin in Japan. The DOAC users were at a lower risk for stroke than the warfarin users. In 20–30% of DOAC users, the dose was inappropriately reduced. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - January 1, 2017 Category: Cardiology Source Type: research

Scar characteristics derived from two- and three-dimensional reconstructions of cardiac contrast-enhanced magnetic resonance images: Relationship to ventricular tachycardia inducibility and ablation success
Conclusions By CE-MRI, we were able to characterize not only the scar, but also its location and heterogeneity, and those features seemed to be related to VT inducibility and successful ablation from an endocardial site. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - December 31, 2016 Category: Cardiology Source Type: research

ABSTRACT Poster Presentation (2)
Publication date: December 2016 Source:Journal of Arrhythmia, Volume 32, Supplement (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - December 13, 2016 Category: Cardiology Source Type: research

ABSTRACT Poster Presentation (1)
Publication date: December 2016 Source:Journal of Arrhythmia, Volume 32, Supplement (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - December 13, 2016 Category: Cardiology Source Type: research

ABSTRACT Oral Presentation (2)
Publication date: December 2016 Source:Journal of Arrhythmia, Volume 32, Supplement (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - December 13, 2016 Category: Cardiology Source Type: research

ABSTRACT Oral Presentation (1)
Publication date: December 2016 Source:Journal of Arrhythmia, Volume 32, Supplement (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - December 13, 2016 Category: Cardiology Source Type: research

CONTENTS Poster Presentation
Publication date: December 2016 Source:Journal of Arrhythmia, Volume 32, Supplement (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - December 13, 2016 Category: Cardiology Source Type: research

CONTENTS Oral Presentation
Publication date: December 2016 Source:Journal of Arrhythmia, Volume 32, Supplement (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - December 13, 2016 Category: Cardiology Source Type: research

The 9th APHRS Scientific Session
Publication date: December 2016 Source:Journal of Arrhythmia, Volume 32, Supplement (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - December 13, 2016 Category: Cardiology Source Type: research

Cover page
Publication date: December 2016 Source:Journal of Arrhythmia, Volume 32, Supplement (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - December 13, 2016 Category: Cardiology Source Type: research

Efficacy of ranolazine in preventing atrial fibrillation following cardiac surgery: Results from a meta-analysis
Conclusions Ranolazine may prove beneficial in POAF prevention following cardiac surgeries. Although the pooled treatment effect is quite impressive with a reduction of more than 50% of risk of developing POAF, small number of studies and variation in ranolazine dose regimen in each study make our results inconclusive, but worthy of further investigation. That is why this result has to be interpreted as only hypothesis generating, rather than conclusion drawing. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - December 5, 2016 Category: Cardiology Source Type: research

Pulmonary vein potential mapping in atrial fibrillation with high density and standard spiral (lasso) catheters: A comparative study
Conclusion High-density mapping with a Basket Catheter, such as the HDMM, detects PVPs that remain undetected when using the standard AC catheter in CBA procedures. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - November 25, 2016 Category: Cardiology Source Type: research

Manifestation of J wave induced by acetylcholine applied for a coronary spasm provocation test in a patient with aborted sudden cardiac death
Publication date: Available online 23 November 2016 Source:Journal of Arrhythmia Author(s): Hiroyuki Kodama, Kazumasa Fujita, Shouhei Moriyama, Kei Irie, Hirotaka Noda, Taku Yokoyama, Mitsuhiro Fukata, Takeshi Arita, Keita Odashiro, Toru Maruyama, Koichi Akashi A 51-year-old man with a resuscitation episode was referred to our hospital. Coronary angiography revealed a focal spasm overlapped with organic stenosis where a bare metal stent was implanted. Acetylcholine (ACh) provocation test did not induce chest pain. It revealed no discernible ST-T changes but unmasked a J wave at the end of the QRS complex, which was associ...
Source: Journal of Arrhythmia - November 23, 2016 Category: Cardiology Source Type: research

Diffuse interstitial fibrosis assessed by cardiac magnetic resonance is associated with dispersion of ventricular repolarization in patients with hypertrophic cardiomyopathy
Conclusion Diffuse interstitial fibrosis is associated with increased dispersion of ventricular repolarization in leads, reflecting electrical activity in the hypertrophied septum. Interstitial fibrosis combined with ion channel/gap junction remodeling in the septum could lead to inhomogeneity of ventricular refractoriness, resulting in increased QTc dispersion in leads V1–V4. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - November 19, 2016 Category: Cardiology Source Type: research

Remote magnetic catheter navigation versus conventional ablation in atrial fibrillation ablation: Fluoroscopy reduction
Conclusions In radiofrequency ablation of atrial fibrillation, RMN appears to significantly reduce fluoroscopy time compared with conventional MAN ablation, though at a cost of increased total procedural time, with comparable acute success rates and safety profile. A reduction in procedure and fluoroscopy times is possible with gaining experience. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - November 10, 2016 Category: Cardiology Source Type: research

Epicardially placed implantable cardioverter-defibrillator for a child with congenital long QT syndrome
We report this rare case of ICD implantation in a child with LQTS. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - November 10, 2016 Category: Cardiology Source Type: research

A proposal of clinical ECG index “vagal score” for determining the mechanism of paroxysmal atrioventricular block
Conclusions The VS is simple and potentially useful for determining the mechanism of P-AVB. P-AVB with a VS ≥3 strongly suggested a vagally mediated mechanism. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - November 9, 2016 Category: Cardiology Source Type: research

Two cases of inappropriate implantable cardioverter-defibrillator therapies due to T wave oversensing induced by body twisting
We report two cases of inappropriate ICD therapy due to TWOS, which were induced only by body twisting. We can successfully manage the device based on the evidence of reproduced TWOS. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - November 1, 2016 Category: Cardiology Source Type: research

Complex fractionated atrial electrograms, high dominant frequency regions, and left atrial voltages during sinus rhythm and atrial fibrillation
Conclusions CFAEs and high DF areas during AF do not reflect damaged atrial myocardium as shown by the SR voltage. However, CFAEs and high DF sites may demonstrate different electrophysiologic properties because of different voltage amplitude during AF. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - October 27, 2016 Category: Cardiology Source Type: research

Molecular mechanisms underlying the pilsicainide-induced stabilization of hERG proteins in transfected mammalian cells
Conclusions Pilsicainide penetrates the plasma membrane, stabilizes WT-hERG proteins by acting as a chemical chaperone, and enhances WT-hERG channel currents. This mechanism could also be applicable to modulations of certain mutant-hERG proteins. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - October 26, 2016 Category: Cardiology Source Type: research

Catechin and epicatechin reduce mitochondrial dysfunction and oxidative stress induced by amiodarone in human lung fibroblasts
Conclusions Catechin and epicatechin reduced mitochondrial dysfunction and oxidative stress caused by AMD in MRC-5 cells. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - October 26, 2016 Category: Cardiology Source Type: research

Anatomical dilatation of the superior vena cava associated with an arrhythmogenic response induced by SVC scan pacing after atrial fibrillation ablation
Conclusion Dilatation of SVC was associated with an arrhythmogenic response, and the AF recurrence rate was significantly higher in patients with large SVC-area. Adjunctive catheter intervention for the SVC might be indicated in patients with a dilated SVC and an arrhythmogenic response. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - October 26, 2016 Category: Cardiology Source Type: research

Report of periprocedural oral anticoagulants in catheter ablation for atrial fibrillation: The Japanese Catheter Ablation Registry of Atrial Fibrillation (J-CARAF)
Conclusions Compared with uninterrupted warfarin, the choice of a direct oral anticoagulant as a periprocedural oral anticoagulant did not significantly change the incidence of serious complications. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - October 26, 2016 Category: Cardiology Source Type: research

Molecular genetics have opened a new era for arrhythmia research, but also Pandora ׳s box?
Publication date: October 2016 Source:Journal of Arrhythmia, Volume 32, Issue 5 Author(s): Minoru Horie (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - October 11, 2016 Category: Cardiology Source Type: research

Syncope in a patient with a dual-chamber pacemaker: What is the possible mechanism?
Publication date: Available online 7 October 2016 Source:Journal of Arrhythmia Author(s): Yavuzer Koza, Ziya Simsek, Selim Aydemir, Remziye Doğan (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - October 9, 2016 Category: Cardiology Source Type: research

Influence of myopotential interference on the Wavelet discrimination algorithm in implantable cardioverter-defibrillator
Conclusions The Wavelet algorithm is influenced by myopotential interference when the Can-RV coil EGM is less than 5mV. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - October 1, 2016 Category: Cardiology Source Type: research

Erratum to ‘2015 HRS/EHRA/APHRS/SOLAECE expert consensus statement on optimal implantable cardioverter-defibrillator programming and testing’ [Journal of Arrhythmia 32/1 (2016) 1–28]
Publication date: Available online 21 September 2016 Source:Journal of Arrhythmia Author(s): Bruce L. Wilkoff, Laurent Fauchier, Martin K. Stiles, Carlos A. Morillo, Sana M. Al-Khatib, Jesœs Almendral, Luis Aguinaga, Ronald D. Berger, Alejandro Cuesta, James P. Daubert, Sergio Dubner, Kenneth A. Ellenbogen, N.A. Mark Estes, Guilherme Fenelon, Fermin C. Garcia, Maurizio Gasparini, David E. Haines, Jeff S. Healey, Jodie L. Hurtwitz, Roberto Keegan, Christof Kolb, Karl-Heinz Kuck, Germanas Marinskis, Martino Martinelli, Mark McGuire, Luis G. Molina, Ken Okumura, Alessandro Proclemer, Andrea M. Russo, Jagmeet P. Singh, ...
Source: Journal of Arrhythmia - September 21, 2016 Category: Cardiology Source Type: research