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https://www.readbyqxmd.com/read/29778240/the-autonomic-neural-mechanism-of-right-ventricular-outflow-tract-tachycardia
#1
Hung-Yu Chang, Li-Wei Lo, Yu-Ruey Chen, Yu-Hui Chou, Wei-Lun Lin, Yenn-Jiang Lin, Wei-Hsian Yin, An-Ning Feng, Shih-Ann Chen
BACKGROUND: Ventricular tachycardia (VT) and ventricular premature complexes (VPCs) originating from the right ventricular outflow tract (RVOT) are generally considered as benign arrhythmias, with ECG morphology showing LBBB pattern and inferior axis. Pathogenic mechanisms in the genesis of RVOT VT/VPC remain largely unknown. We aimed to investigate the neural mechanism in RVOT ventricular arrhythmias in canine model. METHODS: Twelve mongrel dogs (13.7 ± 1...
July 2018: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29771455/statistical-guidance-of-vt-ablation
#2
EDITORIAL
Miguel Rodrigo, Sanjiv M Narayan
No abstract text is available yet for this article.
May 17, 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29760708/dual-tlr2-9-recognition-of-herpes-simplex-virus-infection-is-required-for-recruitment-and-activation-of-monocytes-and-nk-cells-and-restriction-of-viral-dissemination-to-the-central-nervous-system
#3
Erdenebileg Uyangaa, Jin Young Choi, Ajit Mahadev Patil, Ferdaus Mohd Altaf Hossain, Sung Ok Park, Bumseok Kim, Koanhoi Kim, Seong Kug Eo
The importance of TLR2 and TLR9 in the recognition of infection with herpes simplex virus (HSV) and HSV-caused diseases has been described, but some discrepancies remain concerning the benefits of these responses. Moreover, the impact of TLR2/9 on innate and adaptive immune responses within relevant mucosal tissues has not been elucidated using natural mucosal infection model of HSV. Here, we demonstrate that dual TLR2/9 recognition is essential to provide resistance against mucosal infection with HSV via an intravaginal route...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29759835/hemodynamic-support-in-ventricular-tachycardia-ablation-an-international-vt-ablation-center-collaborative-group-study
#4
Mohit K Turagam, Venkat Vuddanda, Donita Atkins, Pasquale Santangeli, David S Frankel, Roderick Tung, Marmar Vaseghi, William H Sauer, Wendy Tzou, Nilesh Mathuria, Shiro Nakahara, Timm M Dickfeld, T Jared Bunch, Peter Weiss, Luigi Di Biase, Venkat Tholakanahalli, Kairav Vakil, Usha B Tedrow, William G Stevenson, Paolo Della Bella, Kalyanam Shivkumar, Francis E Marchlinski, David J Callans, Andrea Natale, Madhu Reddy, Dhanunjaya Lakkireddy
OBJECTIVES: This study sought to evaluate the clinical outcomes of patients receiving hemodynamic support (HS) during ventricular tacchycardia (VT) ablation. BACKGROUND: There are limited real-world data evaluating its effect of HS in ablation outcomes. METHODS: An analysis of 1,655 patients from the International VT Ablation Center Collaborative group was performed. A total of 105 patients received HS with percutaneous ventricular assist device...
December 26, 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29759673/characterization-of-ventricular-tachycardia-after-left-ventricular-assist-device-implantation-as-destination-therapy-a-single-center-ablation-experience
#5
Joshua D Moss, Erin E Flatley, Andrew D Beaser, John H Shin, Hemal M Nayak, Gaurav A Upadhyay, Martin C Burke, Valluvan Jeevanandam, Nir Uriel, Roderick Tung
OBJECTIVES: This study sought to report mechanisms of ventricular tachycardia (VT) and outcomes of VT ablation in patients with a left ventricular assist device (LVAD) as destination therapy. BACKGROUND: Continuous flow LVAD implantation plays a growing role in the management of end-stage heart failure, and VT is common. There are limited reports of VT ablation in patients with a destination LVAD. METHODS: Patients with a continuous-flow LVAD referred for VT ablation from 2010 to 2016 were analyzed retrospectively...
December 11, 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29759543/long-term-outcomes-of-catheter-ablation-of-electrical-storm-in-nonischemic-dilated-cardiomyopathy-compared-with-ischemic-cardiomyopathy
#6
Daniele Muser, Jackson J Liang, Rajeev K Pathak, Silvia Magnani, Simon A Castro, Tatsuya Hayashi, Fermin C Garcia, Gregory E Supple, Michael P Riley, David Lin, Sanjay Dixit, Erica S Zado, David S Frankel, David J Callans, Francis E Marchlinski, Pasquale Santangeli
OBJECTIVES: The goal of this study was to determine the long-term outcomes of catheter ablation (CA) of electrical storm in patients with nonischemic dilated cardiomyopathy (NIDCM) compared with patients with ischemic cardiomyopathy (ICM). BACKGROUND: CA of ventricular tachycardia (VT) electrical storm has been shown to improve VT-free survival in patients with ICM. Data on the outcomes of CA of electrical storm in patients with NIDCM are insufficient. METHODS: The study included 267 consecutive patients with NIDCM (n = 71; ejection fraction 32 ± 14%) and ICM (n = 196; ejection fraction 28 ± 12%)...
July 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29759537/real-time-localization-of-ventricular-tachycardia-origin-from-the-12-lead-electrocardiogram
#7
John L Sapp, Meir Bar-Tal, Adam J Howes, Jonathan E Toma, Ahmed El-Damaty, James W Warren, Paul J MacInnis, Shijie Zhou, B Milan Horáček
OBJECTIVES: The aim of this study was to develop rapid computational methods for identifying the site of origin of ventricular activation from the 12-lead electrocardiogram. BACKGROUND: Catheter ablation of ventricular tachycardia in patients with structural heart disease frequently relies on a substrate-based approach, which may use pace mapping guided by body-surface electrocardiography to identify culprit exit sites. METHODS: Patients undergoing ablation of scar-related VT (n = 38) had 12-lead electrocardiograms recorded during pacing at left ventricular endocardial sites (n = 1,012) identified on 3-dimensional electroanatomic maps and registered to a generic left ventricular endocardial surface divided into 16 segments and tessellated into 238 triangles; electrocardiographic data were reduced for each lead to 1 variable, consisting of QRS time integral...
July 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29757020/recent-advances-in-the-treatment-of-brugada-syndrome
#8
Mariana Argenziano, Charles Antzelevitch
Brugada syndrome (BrS) is an inherited cardiac arrhythmia syndrome characterized by ST-segment elevation in right precordial ECG leads and associated with sudden cardiac death in young adults. The ECG manifestations of BrS are often concealed but can be unmasked by sodium channel blockers and fever. Areas covered: Implantation of a cardioverter defibrillator (ICD) is first-line therapy for BrS patients presenting with prior cardiac arrest or documented VT. A pharmacological approach to therapy is recommended in cases of electrical storm, as an adjunct to ICD and as preventative therapy...
May 14, 2018: Expert Review of Cardiovascular Therapy
https://www.readbyqxmd.com/read/29753944/outcomes-with-prophylactic-use-of-percutaneous-left-ventricular-assist-devices-in-high-risk-patients-undergoing-catheter-ablation-of-scar-related-vt-a-propensity-matched-analysis
#9
Daniele Muser, Jackson J Liang, Simon A Castro, Tatsuya Hayashi, Andres Enriquez, Gregory S Troutman, Nelson W McNaughton, Gregory Supple, Edo Y Birati, Robert Schaller, Fermin C Garcia, David S Frankel, Sanjay Dixit, David J Callans, Erica S Zado, Francis E Marchlinski, Pasquale Santangeli
BACKGROUND: The PAINESD risk score predicts the risk of periprocedural acute hemodynamic decompensation (AHD) and post-procedural mortality in patients (pts) undergoing catheter ablation (CA) of scar-related ventricular tachycardia (VT). The role of prophylactic placement of percutaneous left ventricular assist devices (pLVAD) in high-risk pts is unknown. OBJECTIVES: We evaluated the outcomes of prophylactic use of pLVAD in high-risk pts undergoing CA of scar-related VT...
April 27, 2018: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29753550/rescue-procedure-for-an-electrical-storm-using-robotic-non-invasive-cardiac-radio-ablation
#10
Raphaël Jumeau, Mahmut Ozsahin, Juerg Schwitter, Véronique Vallet, Frédéric Duclos, Michele Zeverino, Raphaël Moeckli, Etienne Pruvot, Jean Bourhis
Stereotactic body radiotherapy (SBRT) is an emerging non-invasive treatment in the management of ventricular tachycardia (VT). We report here an intensive care patient suffering from an electrical storm due to incessant VT, unresponsive to catheter ablation and anti-arrhythmic drugs, showing an immediate and durable response to electrophysiology-guided cardiac SBRT.
May 9, 2018: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/29750365/effect-of-coronary-revascularization-on-long-term-clinical-outcomes-in-patients-with-ischemic-cardiomyopathy-and-recurrent-ventricular-arrhythmia
#11
Ihab Elsokkari, Ratika Parkash, Chris J Gray, Martin J Gardner, Amir M AbdelWahab, Steve Doucette, Anthony S Tang, George A Wells, William G Stevenson, John L Sapp
BACKGROUND: Patients with ventricular tachycardia (VT) post myocardial infarction (MI) are a higher risk group with significant morbidity and mortality. We examined the impact of prior coronary revascularization on clinical outcomes in patients with ischemic cardiomyopathy (ICM) and VT. METHODS: The VANISH trial randomized 259 patients with prior MI and antiarrhythmic drug-refractory VT to receive escalated medical therapy or catheter ablation. Clinical outcomes were compared according to whether patients have undergone prior revascularization procedures...
May 11, 2018: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29747127/wideband-lge-mri-permits-unobstructed-viewing-of-myocardial-scarring-in-a-patient-with-an-mr-conditional-subcutaneous-implantable-cardioverter-defibrillator
#12
Amir Ali Rahsepar, Jeremy D Collins, Bradley P Knight, KyungPyo Hong, James C Carr, Daniel Kim
A subcutaneous implantable cardioverter-defibrillator (S-ICD) is an alternative device for prevention of sudden cardiac death, without any leads within the heart. Patients implanted with any type of ICD may need catheter ablation of ventricular tachycardia (VT) to reduce the overall arrhythmia burden (e.g., recurrent monomorphic VT) and lower the incidence of painful shocks induced by the device. Late gadolinium enhancement (LGE) MRI is a useful pre-test for guiding VT ablation, because it can be used to map myocardial scar and produce better outcomes...
May 4, 2018: Clinical Imaging
https://www.readbyqxmd.com/read/29731502/idiopathic-ventricular-premature-contraction-and-ventricular-tachycardia-distribution-of-the-origin-diagnostic-algorithm-and-catheter-ablation
#13
Yoshinori Kobayashi
Idiopathic ventricular premature contractions (VPCs), defined as VPCs in the absence of obvious structural heart disease, are one of the common types of arrhythmia in clinical practice. They are sometimes complicated with non-sustained ventricular tachycardia (VT), and/or sustained VT with almost same QRS morphology in 12 leads ECG. Idiopathic VT (IVT) commonly occurs by focal mechanisms and the origins are distributed in a variety of sites in both ventricles. In this article, the clinical characteristics of IVT/IVPCs, the diagnostic algorithm, and how to ablate them will be reviewed...
2018: Journal of Nippon Medical School, Nippon Ika Daigaku Zasshi
https://www.readbyqxmd.com/read/29722861/early-and-long-term-outcomes-after-manual-and-remote-magnetic-navigation-guided-catheter-ablation-for-ventricular-tachycardia
#14
Pierre Qian, Kasun De Silva, Saurabh Kumar, Fazlur Nadri, Rahul Samanta, Abhishek Bhaskaran, David Ross, Gopal Sivagangabalan, Mark Cooper, Eddy Kizana, Lloyd Davis, Alan Robert Denniss, Aravinda Thiagalingam, Stuart Thomas, Pramesh Kovoor
Aims: Remote magnetic navigation (RMN) is a safe and effective means of performing ventricular tachycardia (VT) ablation. It may have advantages over manual catheter ablation due to ease of manoeuvrability and catheter stability. We sought to compare the safety and efficacy of RMN vs. manual VT ablation. Methods and results: Retrospective study of procedural outcomes of 139 consecutive VT ablation procedures (69 RMN, 70 manual ablation) in 113 patients between 2009 and 2015 was performed...
May 1, 2018: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29722855/clinical-research-remote-magnetic-navigation-vs-manually-controlled-catheter-ablation-of-right-ventricular-outflow-tract-arrhythmias-a-retrospective-study
#15
Ayelet Shauer, Lennart J De Vries, Ferdi Akca, Jorge Palazzolo, Mohammed Shurrab, Ilan Lashevsky, Irving Tiong, Sheldon M Singh, David Newman, Tamas Szili-Torok, Eugene Crystal
Aims: Remote magnetic navigation (RMN) is an alternative to manual catheter control (MCC) radiofrequency ablation of right ventricular outflow tract (RVOT) arrhythmias. The data to support RMN approach is limited. We aimed to investigate the clinical and procedural outcomes in a cohort of patients undergoing RVOT premature ventricular complex/ventricular tachycardia (PVCs/VT) ablation procedures using RMN vs. MCC. Methods and results: Data was collected from two centres...
May 1, 2018: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29721116/ventricular-tachycardia-storm-originating-from-interventricular-septum-successfully-treated-with-surgical-cryoablation-with-electroanatomic-and-electrophysiological-mapping-before-dual-valve-replacement
#16
Iwanari Kawamura, Seiji Fukamizu, Satoshi Miyazawa, Rintaro Hojo, Fusahiko Ito, Masazumi Watanabe, Mitsuhiro Nishizaki, Harumizu Sakurada, Masayasu Hiraoka
A 58-year-old man with dilated cardiomyopathy was admitted with heart failure. He had a history of two catheter ablation procedures for ventricular tachycardia (VT) originating from the intraventricular septum (IVS). Before dual valve replacement (DVR), he suffered a VT storm. An electrophysiological study revealed an extended low-voltage area at the IVS with the exit of the induced VT at the anterior side. Radiofrequency application was performed at the VT exit as a landmark for surgical cryoablation (SA)...
February 2018: Journal of Arrhythmia
https://www.readbyqxmd.com/read/29716709/management-of-electrical-storm-of-unstable-ventricular-tachycardia-in-post-myocardial-infarction-patients-a-single-centre-experience
#17
B Hygriv Rao, Mohammed Sadiq Azam, Geetesh Manik
OBJECTIVE: This is a case series of consecutive patients with past myocardial infarction presenting with Electrical Storm (ES) of unstable ventricular tachycardia (VT) treated by a protocol directed algorithm. METHODS: Management protocol involved treatment of reversible causes, ventilatory & hemodynamic support, administration of antiarrhythmic drugs (AAD) & maximally tolerated doses of beta-blockers, stellate ganglionectomy and Radiofrequency ablation (RFA) guided by Electro Anatomic Mapping (EAM)...
March 2018: Indian Heart Journal
https://www.readbyqxmd.com/read/29702740/localization-of-ventricular-activation-origin-using-patient-specific-geometry-preliminary-results
#18
Shijie Zhou, John L Sapp, Amir AbdelWahab, Petr Šťovíček, B Milan Horáček
BACKGROUND AND OBJECTIVES: Catheter ablation of ventricular tachycardia (VT) may include induction of VT and localization of VT-exit site. Our aim was to assess localization performance of a novel statistical pace-mapping method and compare it with performance of an electrocardiographic inverse solution. METHODS: Seven patients undergoing ablation of VT (4 with epicardial, 3 with endocardial exit) aided by electroanatomic mapping underwent intraprocedural 120-lead body-surface potential mapping (BSPM)...
April 27, 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29684187/non-invasive-epicardial-and-endocardial-electrocardiographic-imaging-for-scar-related-ventricular-tachycardia
#19
Linwei Wang, Omar A Gharbia, Saman Nazarian, B Milan Horácek, John L Sapp
Aims: Contact mapping is currently used to guide catheter ablation of scar-related ventricular tachycardia (VT) but usually provides incomplete assessment of 3D re-entry circuits and their arrhythmogenic substrates. This study investigates the feasibility of non-invasive electrocardiographic imaging (ECGi) in mapping scar substrates and re-entry circuits throughout the epicardium and endocardium. Methods and results: Four patients undergoing endocardial and epicardial mapping and ablation of scar-related VT had computed tomography scans and a 120-lead electrocardiograms, which were used to compute patient-specific ventricular epicardial and endocardial unipolar electrograms (CEGMs)...
April 18, 2018: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29680972/prophylactic-catheter-ablation-of-ventricular-tachycardia-in-ischemic-cardiomyopathy-a-systematic-review-and-meta-analysis-of-randomized-controlled-trials
#20
REVIEW
Varunsiri Atti, Venkat Vuddanda, Mohit K Turagam, Praveen Vemula, Zubair Shah, Himakar Nagam, Srikanth Yandrapalli, Mohammad-Ali Jazayeri, Scott Koerber, Juan Viles Gonzalez, Andrea Natale, Luigi Di Biase, Dhanunjaya R Lakkireddy
BACKGROUND: Catheter ablation is proven to be an effective strategy for drug refractory ventricular tachycardia (VT) in ischemic cardiomyopathy. However, the appropriate timing of VT ablation and identifying the group of patients that may receive the greatest benefit remains uncertain. There is limited data on the effect on prophylactic catheter ablation (PCA) in the prevention of implantable cardioverter defibrillator (ICD) therapy, electrical storm, and mortality. METHODS: We performed a comprehensive literature search through November 1, 2017, for all eligible studies comparing PCA + ICD versus ICD only in eligible patients with ischemic cardiomyopathy...
April 21, 2018: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
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