Electrophysiological validation of total atrial conduction time measurement by tissue doppler echocardiography according to age and sex in healthy adults
Conclusions When assessed according to the age and sex of healthy participants, TDI and EPS measurements during TACT assessments were similar and correlated with each other. The measurement of TACT via TDI may be used accurately and confidently than the measurement via EPS in healthy individuals. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - January 11, 2016 Category: Cardiology Source Type: research
Mechanisms of cardiac arrhythmias
Publication date: Available online 17 December 2015 Source:Journal of Arrhythmia Author(s): Gary Tse Blood circulation is the result of the beating of the heart, which provides the mechanical force to pump oxygenated blood to, and deoxygenated blood away from, the peripheral tissues. This depends critically on the preceding electrical activation. Disruptions in the orderly pattern of this propagating cardiac excitation wave can lead to arrhythmias. Understanding of the mechanisms underlying their generation and maintenance requires knowledge of the ionic contributions to the cardiac action potential, which is discuss...
Source: Journal of Arrhythmia - January 11, 2016 Category: Cardiology Source Type: research
Effectiveness of Ventricular Intrinsic Preference (VIP™) and Ventricular AutoCapture (VAC) algorithms in pacemaker patients: Results of the validate study
Conclusions In our study cohort, the use of the VIP algorithm significantly reduced the %RVp, while the VAC algorithm reduced in-clinic time needed to collect device data. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - October 1, 2015 Category: Cardiology Source Type: research
An appropriate shock of the wearable cardioverter-defibrillator in an outpatient setting
We report the first case of appropriate shock therapy using the WCD in an outpatient setting in Japan. We describe the case of a 22-year-old-woman who received the first case of successful appropriate WCD shock therapy in an outpatient setting in Japan. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - September 27, 2015 Category: Cardiology Source Type: research
Impact of esophageal temperature monitoring guided atrial fibrillation ablation on preventing asymptomatic excessive transmural injury
Conclusions Catheter ablation using ETM may reduce the incidence of esophageal injury without increasing the incidence of AF recurrence but not the incidence of peri-ENI. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - September 17, 2015 Category: Cardiology Source Type: research
Clinical implication of monitoring rivaroxaban and apixaban by using anti-factor Xa assay in patients with non-valvular atrial fibrillation
Conclusions Measurement of AXA might be useful to assess the pharmacodynamics of high-risk patients, such as high age, low body weight, and/or low renal function, and to assess the intensity of anticoagulation by using different methods of administration, such as crushed tablet via the nasogastric tube. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - September 16, 2015 Category: Cardiology Source Type: research
Efficacy of bilateral thoracoscopic sympathectomy in a patient with catecholaminergic polymorphic ventricular tachycardia
Publication date: Available online 30 August 2015 Source:Journal of Arrhythmia Author(s): Katsunori Okajima, Kunihiko Kiuchi, Kiminobu Yokoi, Jin Teranishi, Kosuke Aoki, Akira Shimane, Yoshihide Nakamura, Motoko Kimura, Yoshio Horikawa, Masato Yoshida, Yoshimasa Maniwa A 27-year-old woman with frequent implantable cardioverter defibrillator (ICD) shocks related to catecholaminergic polymorphic ventricular tachycardia (VT) experienced aborted sudden death due to incessant polymorphic VT despite the administration of beta-blockers, verapamil, and flecainide. Catheter ablation failed to suppress the ...
Source: Journal of Arrhythmia - August 31, 2015 Category: Cardiology Source Type: research
Lead extraction using a laser system: Techniques, efficacy, and limitations
Publication date: Available online 18 August 2015 Source:Journal of Arrhythmia Author(s): Hideo Okamura Transvenous lead extraction is becoming popular in Japan since the approval of laser extraction system in 2010. The laser system seems to be the standard method used by most physicians, owing to its efficacy and ease of handling. The efficacy and safety of this technology has been well proven in many studies and the data suggest that it can be used for Japanese patients safely. However, lead extraction can cause serious complications. Thus, it is important to learn the limitations as well as the basic techniques an...
Source: Journal of Arrhythmia - August 19, 2015 Category: Cardiology Source Type: research
Biphasic P wave in inferior leads and the development of atrial fibrillation
Conclusion The analyses of the biphasic P wave in the inferior leads suggest that the development of AF could be attributed to increased atrial slow conduction. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - August 12, 2015 Category: Cardiology Source Type: research
Perioperative management for the prevention of bacterial infection in cardiac implantable electronic device placement
Publication date: Available online 8 August 2015 Source:Journal of Arrhythmia Author(s): Katsuhiko Imai Cardiac implantable electronic devices (CIEDs) have become important in the treatment of cardiac disease and placement rates increased significantly in the last decade. However, despite the use of appropriate antimicrobial prophylaxis, CIED infection rates are increasing disproportionately to the implantation rate. CIED infection often requires explantation of all hardware, and at times results in death. Surgical site infection (SSI) is the most common cause of CIED infection as a pocket infection. The best method ...
Source: Journal of Arrhythmia - August 8, 2015 Category: Cardiology Source Type: research
Effect of adenosine triphosphate on left atrial electrogram interval and dominant frequency in human atrial fibrillation
Conclusions ATP shortens atrial FIs and increases DFs in both PAF and PerAF patients. The significant increase in DF in PAF patients suggests that pathophysiologic characteristics related to the frequency of atrial fractionation change as atrial remodeling progresses. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - August 5, 2015 Category: Cardiology Source Type: research
Successful implantable cardioverter-defibrillator implantation through a communicating branch of the persistent left superior vena cava
Publication date: Available online 27 July 2015 Source:Journal of Arrhythmia Author(s): Vineet Kumar, Naoki Yoshida, Takumi Yamada A left pectoral dual chamber implantable cardioverter-defibrillator (ICD) was successfully implanted through a small branch communicating between a persistent left superior vena cava (PLSVC) and right-sided venous drainage with long sheaths. Postprocedural computed tomography identified the communicating branch. ICD lead implantation through a PLSVC is challenging and sometimes unsuccessful. This case illustrates an alternative approach for ICD lead implantation in patients with a PLS...
Source: Journal of Arrhythmia - July 28, 2015 Category: Cardiology Source Type: research
Hemodynamic effects of Purkinje potential pacing in the left ventricular endocardium in patients with advanced heart failure
Conclusions The hemodynamic outcome of PP pacing was comparable to that of BiV pacing in patients with advanced heart failure. (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - July 17, 2015 Category: Cardiology Source Type: research
Shortness of breath in a patient with complete heart block and permanent pacemaker: A case of effective pacemaker reprogramming
Publication date: Available online 17 July 2015 Source:Journal of Arrhythmia Author(s): Sandeep Arora (Source: Journal of Arrhythmia)
Source: Journal of Arrhythmia - July 17, 2015 Category: Cardiology Source Type: research
A case of premature ventricular contractions, ventricular tachycardia, and arrhythmic storm induced by right ventricular pacing during cardiac resynchronization therapy: Electrophysiological mechanism and catheter ablation
Publication date: Available online 15 July 2015 Source:Journal of Arrhythmia Author(s): Stefano Pedretti, Sara Vargiu, Marco Paolucci, Maurizio Lunati A 77-year-old man with ischemic cardiomyopathy and a cardiac resynchronization therapy-defibrillator (CRT-D) device came to our attention due to incessant ventricular tachycardia and multiple implantable cardioverter defibrillator (ICD) shocks. An electrocardiogram showed non-sustained monomorphic ventricular tachycardias (NSVTs) constantly occurring after each biventricular stimulation. During an electrophysiological study, NSVTs reproducibly recurred only after...
Source: Journal of Arrhythmia - July 16, 2015 Category: Cardiology Source Type: research
