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Tachycardia ablation

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https://www.readbyqxmd.com/read/29045344/atrial-fibrillation-and-cardiac-resynchronization-therapy
#1
Maurizio Gasparini, Paola Galimberti
PURPOSE OF REVIEW: Atrial fibrillation and heart failure are commonly encountered in current clinical practice. This review aims to revisit the complex interaction of these two common situations and the best treatment whenever both occurs, especially focusing on heart failure patients undergoing cardiac resynchronization therapy (CRT). RECENT FINDINGS: It has been recently confirmed that in patients undergoing cardiac resynchronization therapy, 100% biventricular pacing percentage should be pursued...
October 17, 2017: Current Opinion in Cardiology
https://www.readbyqxmd.com/read/29044787/intracardiac-ablation-for-atrioventricular-nodal-reentry-tachycardia-using-a-6%C3%A2-mm-distal-electrode-cryoablation-catheter-prospective-multicenter-north-american-study-icy-avnrt-study
#2
Peter Wells, Marc Dubuc, George J Klein, Dan Dan, Jean-Francois Roux, Evan Lockwood, Marcio Sturmer, David Dunbar, Paul Novak, Arun Rao, Brett J Peterson, Fred Kueffer, Kenneth A Ellenbogen
INTRODUCTION: Radiofrequency (RF) ablation is effective for slow pathway ablation, but carries a risk of inadvertent AV block requiring permanent pacing. By comparison, cryoablation with a 4 mm distal electrode catheter has not been reported to cause permanent AV block but has been shown to be less effective than RF ablation. We sought to define the safety and efficacy of a 6 mm distal electrode cryoablation catheter for slow pathway ablation in patients with atrioventricular nodal reentry tachycardia (AVNRT)...
October 17, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29042948/the-efficacy-of-radiofrequency-ablation-in-the-treatment-of-pediatric-arrhythmia-and-its-effects-on-serum-il-6-and-hs-crp
#3
Chunli Li, Libo Jia, Zhenzhou Wang, Ling Niu, Xinjiang An
The aim of this study was to investigate the efficacy of radiofrequency ablation in the treatment of pediatric arrhythmia and to assess the changes in serum interleukin-6 (IL-6) and hs-CRP levels after treatment. Hundred and six children with tachyarrhythmia who were admitted to Xuzhou Children's Hospital from November, 2014 to December, 2015 were recruited for study. The efficacies of radiofrequency in the treatment of different types of arrhythmia were analyzed. Successful ablation was found in 104 cases (98...
October 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29036525/circulating-micrornas-in-arrhythmogenic-right-ventricular-cardiomyopathy-with-ventricular-arrhythmia
#4
Shinya Yamada, Ya-Wen Hsiao, Shih-Lin Chang, Yenn-Jiang Lin, Li-Wei Lo, Fa-Po Chung, Shuo-Ju Chiang, Yu-Feng Hu, Ta-Chuan Tuan, Tze-Fan Chao, Jo-Nan Liao, Chin-Yu Lin, Yao-Ting Chang, Abigail Louise D Te, Yung-Nan Tsai, Shih-Ann Chen
Aims: MicroRNAs (miRNAs) have been implicated in cardiac diseases. This study aimed to characterize the circulating miRNAs in patients with arrhythmogenic right ventricular cardiomyopathy (ARVC) and correlate the miRNAs with the clinical outcomes of ARVC. Methods and results: This study included 62 patients with ventricular arrhythmia (VA): 28 patients (45%) had definite ARVC, 11 (18%) had borderline or possible ARVC, and 23 (37%) had idiopathic ventricular tachycardia (VT)...
September 25, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29035207/novel-quantitative-analytical-approaches-for-rotor-identification-and-associated-implications-for-mapping
#5
Elizabeth M Annoni, Shivaram Poigai Arunachalam, Suraj Kapa, Siva K Mulpuru, Paul A Friedman, Elena G Talkachova
OBJECTIVE: Clinical studies identifying rotors confirming these sites for ablation in treating cardiac arrhythmias have had inconsistent results with the current analysis techniques available. The aim of this study is to evaluate four new signal analysis approaches - multiscale frequency (MSF), Shannon entropy (SE), Kurtosis (Kt), and multiscale entropy (MSE) - in their ability to identify the pivot point of rotors. METHODS: Optical mapping movies of ventricular tachycardia were used to evaluate the performance and robustness of SE, Kt, MSF and MSE techniques with respect to several clinical limitations: decreased time duration, reduced spatial resolution, and the presence of meandering rotors...
October 16, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/29030235/impact-of-ventricular-tachycardia-ablation-on-healthcare-utilization
#6
Jeffrey R Winterfield, Alexander R Kent, Edward Karst, Nirav Dalal, Srijoy Mahapatra, T Jared Bunch, Matthew R Reynolds, David J Wilber
BACKGROUND: Catheter ablation of ventricular tachycardia (VT) has been shown to reduce the number of recurrent shocks in patients with implantable cardioverter defibrillators (ICDs). However, it remains unclear how VT ablation affects post-procedural medical and pharmaceutical usage. OBJECTIVES: The objective of this study was to investigate changes in healthcare resource utilization (HCRU) following VT ablation. METHODS: This large-scale, real-world, retrospective study used the MarketScan databases to identify patients in the U...
October 10, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29029561/women-with-psvt-are-often-misdiagnosed-referred-later-than-men-and-have-more-symptoms-after-ablation
#7
Carina Carnlöf, Marie Iwarzon, Mats Jensen-Urstad, Fredrik Gadler, Per Insulander
OBJECTIVES: Using a patient and gender perspective, this study evaluates the experiences and perspectives of referral for paroxysmal supraventricular tachycardia (PSVT), and symptoms, Health-Related Quality of Life (HRQOL) and functional impairment before and six months after ablation. DESIGN: This prospective study includes 214 (109 women) patients with PSVT who completed questionnaires before and after ablation addressing referral patterns, duration of arrhythmia, socioeconomic status, symptoms, HRQOL, and functional impairment...
October 13, 2017: Scandinavian Cardiovascular Journal: SCJ
https://www.readbyqxmd.com/read/29026559/verapamil-sensitive-atrial-tachycardia-with-a-slow-conduction-zone-near-the-noncoronary-aortic-sinus-and-his-bundle
#8
Osamu Inaba, Yasutoshi Nagata, Yasuteru Yamauchi, Takamichi Miyamoto, Masahiko Goya, Kenzo Hirao
This report presents a verapamil-sensitive atrial tachycardia, mid-atrium septum activating the earliest. Concealed entrainment was obtained at noncoronary aortic sinus (NCS), where the local activation was delayed compared to mid-septum. The tachycardia was successfully ablated at NCS. The entrance of the slow conduction zone was located at NCS.
October 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/29024212/prevalence-and-predictive-factors-of-left-atrial-tachycardia-occurring-after-second-generation-cryoballoon-ablation-of-atrial-fibrillation
#9
Alexis Hermida, Maciej Kubala, Sarah Traullé, Otilia Buiciuc, Serge Quenum, Jean-Sylvain Hermida
INTRODUCTION: Assess the prevalence and predictors of Left Atrial Tachycardia (LAT) after cryoballoon ablation of pulmonary veins. METHODS AND RESULTS: Patients who underwent catheter ablation of pulmonary veins with a second-generation cryoballoon for symptomatic paroxysmal (151/270, 56%) or persistent (119/270, 44%) atrial fibrillation were entered in a single-centre prospective registry. Patients who experienced post-cryoballoon LAT (pcryo-LAT) were selected on the basis of 12-lead ECG characteristics...
October 11, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29024127/pacemapping-guided-by-defibrillator-electrograms-for-ventricular-tachycardia-ablation-in-a-patient-with-arvd-c
#10
Adolfo Fontenla, Álvaro Lozano, María López-Gil, Fernando Arribas
No abstract text is available yet for this article.
October 11, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29023787/percutaneous-transapical-approach-and-transcatheter-closure-for-ventricular-tachycardia-ablation
#11
Veysel Kutay Vurgun, Ali Timucin Altin, Mustafa Kilickap, Basar Candemir, Omer Akyurek
In patients with mechanical aortic and mitral valve prosthesis, left ventricular (LV) endocardial ablation via retrograde transaortic or antegrade transmitral approach carry high risk of catheter entrapment and death. In such cases, ablation can be performed via ventricular transseptal or transapical approach. Transapical approach, with the ease of catheter maneuverability and better endocardial contact, may be performed surgically or percutaneously. In this case report, we describe a patient with both aortic and mitral mechanical prosthesis who underwent ventricular tachycardia (VT) ablation via percutaneous transapical endocardial approach with the use of closure device...
October 11, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29021859/the-electrical-circuit-of-a-hemodynamically-unstable-and-recurrent-ventricular-tachycardia-diagnosed-in-35%C3%A2-s-with-the-rhythmia-mapping-system
#12
Masateru Takigawa, Antonio Frontera, Nathaniel Thompson, Stefano Capellino, Pierre Jais, Frederic Sacher
Herein, we report a 47-year-old woman with ischemic cardiomyopathy who underwent ablation therapy due to an electrical storm without any triggers. The voltage mapping in sinus rhythm with the Rhythmia system and Orion catheter displayed several LAVAs in and around the anteroapical scar area. Although the patient did not tolerate the induced clinical ventricular tachycardia, which was reproductively induced, 35-second-mapping in the scar zone with the Orion catheter demonstrated the VT circuit with the critical isthmus...
October 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/29021856/refractory-ventricular-tachycardia-caused-by-inflow-cannula-mechanical-injury-in-a-patient-with-left-ventricular-assist-device-catheter-ablation-and-pathological-findings
#13
Stefano Pedretti, Manlio Cipriani, Edgardo Bonacina, Sara Vargiu, Vered Gil Ad, Maria Frigerio, Maurizio Lunati
In patients with left ventricular assist device (LVAD), a minority of post-operative ventricular tachycardias (VTs) is caused by contact between the inflow cannula and the endocardium. Currently, electrophysiologic characteristics and pathologic features of this condition are lacking. We report on a case of a successfully ablated mechanical VT. After VT recurrence, heart transplantation took place. Pathologic observations were consistent with direct tissue injury and inflammation, eventually contributing to persisting arrhythmias...
October 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/29021848/scar-characteristics-derived-from-two-and-three-dimensional-reconstructions-of-cardiac-contrast-enhanced-magnetic-resonance-images-relationship-to-ventricular-tachycardia-inducibility-and-ablation-success
#14
Kazumasa Sonoda, Yasuo Okumura, Ichiro Watanabe, Koichi Nagashima, Hiroaki Mano, Rikitake Kogawa, Naoko Yamaguchi, Keiko Takahashi, Kazuki Iso, Kimie Ohkubo, Toshiko Nakai, Satoshi Kunimoto, Atsushi Hirayama
BACKGROUND: The relationship between cardiac contrast-enhanced magnetic resonance imaging (CE-MRI)-derived scar characteristics and substrate for ventricular tachycardia (VT) in patients with structural heart disease (SHD) has not been fully investigated. METHODS: This study included 51 patients (mean age, 63.3±15.1 years) who underwent CE-MRI with SHD and VT induction testing before ablation. Late gadolinium-enhanced (LGE) regions on MRI slices were quantified by thresholding techniques...
October 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/29018520/prophylactic-catheter-ablation-for-ventricular-tachycardia-are-we-there-yet
#15
Rahul K Mukherjee, Louisa O'Neill, Mark D O'Neill
Ventricular tachycardia (VT), often degenerating into ventricular fibrillation, is the leading cause of sudden cardiac death. Catheter ablation of VT is associated with relatively low, long-term success rates, while the optimal timing of ablation in patients with ischaemic and non-ischaemic cardiomyopathy remains unclear. Contemporary practice in most centres is to consider ablation late in the disease process following the failure of anti-arrhythmic medications and/or following recurrent implantable cardioverter-defibrillator shocks...
August 2017: Arrhythmia & Electrophysiology Review
https://www.readbyqxmd.com/read/29018519/limitations-and-challenges-in-mapping-ventricular-tachycardia-new-technologies-and-future-directions
#16
Adam J Graham, Michele Orini, Pier D Lambiase
Recurrent episodes of ventricular tachycardia in patients with structural heart disease are associated with increased mortality and morbidity, despite the life-saving benefits of implantable cardiac defibrillators. Reducing implantable cardiac defibrillator therapies is important, as recurrent shocks can cause increased myocardial damage and stunning, despite the conversion of ventricular tachycardia/ventricular fibrillation. Catheter ablation has emerged as a potential therapeutic option either for primary or secondary prevention of these arrhythmias, particularly in post-myocardial infarction cases where the substrate is well defined...
August 2017: Arrhythmia & Electrophysiology Review
https://www.readbyqxmd.com/read/29018165/catheter-ablation-of-the-superolateral-mitral-isthmus-line-a-novel-approach-to-reduce-the-need-for-epicardial-ablation
#17
Tilman Maurer, Andreas Metzner, S Yen Ho, Peter Wohlmuth, Bruno Reißmann, Christian Heeger, Christine Lemes, Kentaro Hayashi, Ardan M Saguner, Johannes Riedl, Christian Sohns, Shibu Mathew, Karl-Heinz Kuck, Erik Wissner, Feifan Ouyang
BACKGROUND: The mitral isthmus is a critical part of perimitral reentrant tachycardia, as well as an important substrate of persistent atrial fibrillation. Deployment of an endocardial mitral isthmus line (MIL) with the end point of bidirectional block may be challenging and often requires additional epicardial ablation within the coronary sinus. METHODS AND RESULTS: The study population comprised 114 patients with perimitral flutter who underwent de novo ablation of an MIL...
October 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/29016882/intra-atrial-re-entrant-tachycardia-in-patients-with-congenital-heart-disease-factors-associated-with-disease-severity
#18
Ivo Roca-Luque, Nuria Rivas Gándara, Laura Dos Subirà, Jaume Francisco Pascual, Jordi Pérez-Rodon, Antònia Pijuan Domenech, Ma Teresa Subirana, Berta Miranda, Alba Santos Ortega, Jaume Casaldàliga Ferrer, David García-Dorado García, Angel Moya Mitjans
Aim: Intra-atrial re-entrant tachycardia (IART) is a common complication in patients with congenital heart disease (CHD) and is related to increased morbidity and mortality. Few reports have been published about factors associated to IART severity. The aim of this study is to analyse factors associated to severe clinical presentation of IART. Methods and Results: Observational study of all consecutive CHD patients who underwent a first IART ablation from January 2009 to December 2015 (94 patients, 39...
July 28, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29016834/the-effect-of-ventricular-pre-excitation-on-ventricular-wall-motion-and-left-ventricular-systolic-function
#19
ChenCheng Dai, BaoJing Guo, WenXiu Li, YanYan Xiao, Mei Jin, Ling Han, JianZeng Dong
Aims: The relationship between ventricular pre-excitation and left ventricular dysfunction has been described in the absence of sustained supraventricular tachycardia in a series of case reports. There have been no systematic studies about the effect of ventricular pre-excitation with different accessory pathway locations on ventricular wall motion and left ventricular (LV) systolic function. Methods and results: Thirty patients were selected for each of 4 groups, including those with right septal pathways (Group 1), right free-wall pathways (Group 2), left free-wall pathways (Group 3), and non-pre-excited patients undergoing electrophysiological evaluation for supraventricular tachycardia...
August 9, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29016802/intra-atrial-re-entrant-tachycardia-in-congenital-heart-disease-types-and-relation-of-isthmus-to-atrial-voltage
#20
Ivo Roca-Luque, Nuria Rivas Gándara, Laura Dos Subirà, Jaume Francisco Pascual, Antònia Pijuan Domenech, Jordi Pérez-Rodon, M Teresa Subirana, Alba Santos Ortega, Berta Miranda, Ferran Rosés-Noguer, Ignacio Ferreira-Gonzalez, Jaume Casaldàliga Ferrer, David García-Dorado García, Angel Moya Mitjans
Background: Intra-atrial re-entrant tachycardia (IART) is a frequent and severe complication in patients with congenital heart disease (CHD). Cavotricuspid isthmus (CTI)-related IART is the most frequent mechanism. However, due to fibrosis and surgical scars, non-CTI-related IART is also frequent. Objective: The main objective of this study was to describe the types of IART and circuit locations and to define a cut-off value for unhealthy tissue in the atria. Methods and results: This observational study included all consecutive patients with CHD who underwent a first ablation procedure for IART from January 2009 to December 2015 (94 patients, 39...
August 9, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
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