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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/29759782/regional-left-ventricular-electrical-activation-and-peak-contraction-are-closely-related-in-candidates-for-cardiac-resynchronization-therapy
#2
Masih Mafi-Rad, Jetske Van't Sant, Yuri Blaauw, Pieter A Doevendans, Maarten J Cramer, Harry J Crijns, Frits W Prinzen, Mathias Meine, Kevin Vernooy
OBJECTIVES: This study determined the relationship between the timing of left ventricular (LV) electrical activation and peak contraction at potential LV pacing locations in candidates for cardiac resynchronization therapy (CRT). BACKGROUND: Targeting the LV lead to the region of latest electrical activation or the segment of latest peak contraction has both been shown to improve CRT response. Whether these regions correspond within CRT patients is uncertain. METHODS: Twenty-eight consecutive CRT candidates underwent intraprocedural coronary venous electroanatomic mapping using EnSite NavX...
August 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29756200/ablation-of-symptomatic-ventricular-tachycardia-after-surgical-correction-of-ventricular-septal-defect-in-childhood-using-high-density-mapping-how-precise-is-ensite-precision
#3
Maciej Wójcik, Łukasz Konarski, Piotr Aljabali, Przemysław Zając, Robert Błaszczyk
No abstract text is available yet for this article.
2018: Kardiologia Polska
https://www.readbyqxmd.com/read/29680971/use-of-impedance-based-catheter-tip-to-tissue-contact-assessment-electroanatomic-coupling-index-eci-in-typical-right-atrial-flutter-ablation
#4
Massimiliano Maines, Francesco Peruzza, Alessandro Zorzi, Domenico Catanzariti, Carlo Angheben, Maurizio Del Greco
PURPOSE: The electrical coupling index (ECI) (Abbott, USA) is a marker of tissue contact and ablation depth developed particularly for atrial fibrillation treatment. We sought to evaluate if these measures can be also a marker of lesion efficacy during cavotricuspid isthmus (CTI) ablation for typical right atrial flutter. METHODS: We assessed the ECI values in patients undergoing typical right atrial flutter point-by-point ablation guided by the Ensite Velocity Contact™ (St...
April 21, 2018: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/29678889/stress-control-for-a-well-structured-life
#5
David C Goldstone, Edward N Baker
Aerobic life brings with it a need to respond to external redox stress in ways that preserve key processes. <u>S</u>uppressor of <u>c</u>opper <u>s</u>ensitivity (Scs) proteins contribute to this response in some bacteria, but have poorly defined molecular functions. Furlong et al. now demonstrate that two Scs proteins from Proteus mirabilis provide a redox relay functionally equivalent to, but structurally distinct from, the Dsb proteins that orchestrate disulfide bonding in Escherichia coli , emphasizing the wide prevalence of this mechanism in bacteria...
April 20, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29562427/-initial-experience-of-catheter-ablation-of-ventricular-tachycardia-originate-from-endocardium-via-direct-ventricle-puncture-access-in-patients-underwent-mechanical-valve-implantation
#6
L M Wu, J R Bao, L H Zheng, G Chen, L G Ding, Y Yao
Objective: To evaluate the results of catheter ablation of ventricular tachycardia (VT) via direct ventricle puncture access in patients without traditional approach. Methods: Two idiopathic left fasicular VT patients with mechanical aortic and mitrial valve repalcement and 1 patient with right ventricular originated VT post mechanical tricuspid valve repalcement from March 2010 to July 2012 in Fuwai hospital were enrolled in this study. For left fasicular VT patients, catheter ablation was performed using transapical left ventricular access via minithoracotomy...
March 24, 2018: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/29476203/first-experience-with-zero-fluoroscopic-ablation-for-supraventricular-tachycardias-using-a-novel-impedance-and-magnetic-field-based-mapping-system
#7
Katie A Walsh, Joseph Galvin, John Keaney, Edward Keelan, Gabor Szeplaki
AIMS: Zero- and near-zero-fluoroscopic ablation techniques reduce the harmful effects of ionizing radiation during invasive electrophysiology procedures. We aimed to test the feasibility and safety of a zero-fluoroscopic strategy using a novel integrated magnetic and impedance-based electroanatomical mapping system for radiofrequency ablation (RFA) of supraventricular tachycardias (SVTs). METHODS: We retrospectively studied 92 consecutive patients undergoing electrophysiology studies with/without RFA for supraventricular tachycardia (SVT) performed by a single operator at a single center...
February 23, 2018: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/29388068/characterizing-left-ventricular-mechanical-and-electrical-activation-in-patients-with-normal-and-impaired-systolic-function-using-a-non-fluoroscopic-cardiovascular-navigation-system
#8
Christopher Piorkowski, Arash Arya, Craig D Markovitz, Hedi Razavi, Chunlan Jiang, Stuart Rosenberg, Ole-A Breithardt, Sascha Rolf, Silke John, Jedrzej Kosiuk, Yan Huo, Michael Döring, Sergio Richter, Kyungmoo Ryu, Thomas Gaspar, Frits W Prinzen, Gerhard Hindricks, Philipp Sommer
PURPOSE: Cardiac disease frequently has a degenerative effect on cardiac pump function and regional myocardial contraction. Therefore, an accurate assessment of regional wall motion is a measure of the extent and severity of the disease. We sought to further validate an intra-operative, sensor-based technology for measuring wall motion and strain by characterizing left ventricular (LV) mechanical and electrical activation patterns in patients with normal (NSF) and impaired systolic function (ISF)...
April 2018: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/29318633/long-term-outcomes-following-cryoablation-of-atrioventricular-nodal-reentrant-tachycardia-in-children
#9
Mehmet Karacan, Nida Çelik, Celal Akdeniz, Volkan Tuzcu
BACKGROUND: Atrioventricular nodal reentrant tachycardia (AVNRT) is a common tachyarrhythmia substrate in children, which is successfully treated by catheter ablation using radiofrequency or cryothermal energy. In recent years, cryoablation (Cryo) using electroanatomical system guidance is more commonly preferred for use in children in order to decrease the risk of an atrioventricular block. However, there are concerns regarding the long-term efficacy of Cryo in treating AVNRT. We aimed to evaluate the feasibility, safety, and long-term efficacy of Cryo for AVNRT in children...
January 9, 2018: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29250270/high-voltage-guided-pulmonary-vein-isolation-in-paroxysmal-atrial-fibrillation
#10
Usama Boles, Enes E Gul, Andres Enriquez, Howard Lee, Dave Riegert, Adrian Andres, Adrian Baranchuk, Damian Redfearn, Benedict Glover, Chris Simpson, Hoshiar Abdollah, Kevin Michael
Background: Ablation of the pulmonary vein (PV) antrum using an electroanatomic mapping system is standard of care for point-by-point pulmonary vein isolation (PVI). Focused ablation at critical areas is more likely to achieve intra-procedural PV isolation and decrease the likelihood for reconnection and recurrence of atrial fibrillation (AF). Therefore this prospective pilot study is to investigate the short-term outcome of a voltage-guided circumferential PV ablation (CPVA) strategy...
February 2017: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/29222861/zero-fluoroscopy-permanent-pacemaker-implantation-using-ensite-navx-system-clinical-viability-or-fanciful-technique
#11
Ping Guo, Jie Qiu, Yan Wang, Guangzhi Chen, Riccardo Proietti, Al-Selmi Fadhle, Chunxia Zhao, Dao Wen Wang
BACKGROUND: Fluoroscopy is the imaging modality routinely used for cardiac device implantation and electrophysiological procedures. Due to the rising concern regarding the harmful effects of radiation exposure to both the patients and operation staffs, novel 3D mapping systems have been developed and implemented in electrophysiological procedure for the navigation of catheters inside the heart chambers. Their applicability in cardiac device implantation has been rarely reported. Our aim is to evaluate the feasibility and safety of permanent pacemaker implantation without fluoroscopy...
February 2018: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28975636/combining-electromagnetic-navigation-and-3-d-mapping-to-reduce-fluoroscopy-time-and-achieve-optimal-crt-response
#12
Umberto Barbero, Carlo Budano, Pier Giorgio Golzio, Davide Castagno, Fiorenzo Gaita
Implantation of cardiac resynchronization therapy (CRT) devices can be challenging, time consuming, and associated with high-dose x-ray exposure. We present the technique in which an electromagnetic navigation system (MediGuideTM, St. Jude Medical) and an electroanatomical three-dimensional mapping system (EnSite NavX, St Jude Medical) are usefully combined for implanting implantable cardioverter defibrillator CRT devices with strong reduction of x-ray exposure, and for targeting the most delayed regions in the activation maps avoiding scars for optimal CRT response...
October 4, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28928979/ablation-of-a-left-sided-accessory-pathway-with-near-zero-fluoroscopy-in-a-9-year-old-boy
#13
Gabriel Cismaru, Lucian Muresan, Mihai Puiu, Radu Rosu, Gabriel Gusetu, Dana Pop, Dumitru Zdrenghea
Catheter ablation of cardiac arrhythmias in pediatric population is associated with the risk of ionizing radiation on the child. Due to a greater radiation sensitivity in children and a longer life expectancy newer techniques try to reduce the radiation exposure. A new technique for zero-fluoroscopy catheter ablation is described in a 9-year-old boy who had a left-sided concealed accessory pathway. The NAVX Ensite 3D mapping system permits catheter placement inside the venous system and movement inside the heart chambers without the use of X-rays...
September 2017: Oxford Medical Case Reports
https://www.readbyqxmd.com/read/28862806/initial-experience-of-a-novel-mapping-system-combined-with-remote-magnetic-navigation-in-the-catheter-ablation-of-atrial-fibrillation
#14
Changjian Lin, Steen Pehrson, Peter Karl Jacobsen, Xu Chen
BACKGROUND: There have been advancements of sophisticated mapping systems used for ablation procedures over the last decade. Utilization of these novel mapping systems in combination with remote magnetic navigation (RMN) needs to be established. We investigated the new EnSite Precision mapping system (St. Jude Medical, Inc., St. Paul, MN, USA), which collects magnetic data for checking navigation field stability and is built on an open platform, allowing physicians to choose diagnostic and ablation catheters...
December 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28765755/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
#15
Masateru Takigawa, Atsushi Takahashi, Taishi Kuwahara, Kenji Okubo, Emiko Nakashima, Yuji Watari, Kazuya Yamao, Jun Nakajima, Yasuaki Tanaka, Katsumasa Takagi, Shigeki Kimura, Hiroyuki Hikita, Kenzo Hirao, Mitsuaki Isobe
BACKGROUND: The present study aimed to elucidate the safety and effectiveness of a noble and unique airway management technique in which a pediatric intubation tube is used in adult patients with atrial fibrillation (AF) undergoing catheter ablation (CA) under continuous deep sedation. METHODS: In total, 246 consecutive patients with AF (mean age, 65±10 years; 60 women) underwent CA under dexmedetomidine-based continuous deep sedation. A 4-mm pediatric intubation tube guided by a 10-French intratracheal suction tube was inserted smoothly, and the tip of the tube was located at the base of the epiglottis...
August 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/28716699/bridge-to-success-a-better-method-of-cryoablation-for-atrioventricular-nodal-reentrant-tachycardia-in-children
#16
Charitha D Reddy, Scott R Ceresnak, Kara S Motonaga, Kishor Avasarala, Christine Feller, Anthony Trela, Debra Hanisch, Anne M Dubin
BACKGROUND: Cryoablation for atrioventricular nodal reentrant tachycardia (AVNRT) is associated with higher recurrence rates than radiofrequency ablation (RFA). Junctional tachycardia marks procedural success with RFA, but no such indicator exists for cryoablation. OBJECTIVE: The purpose of this study as to determine the impact of voltage mapping plus longer ablation lesions on midterm success of cryoablation for children with AVNRT. METHODS: We performed a single-center retrospective analysis of pediatric patients with AVNRT who underwent cryoablation from 2011 to 2015...
November 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28612907/safety-and-efficacy-of-cryoablation-without-the-use-of-fluoroscopy
#17
Edward Kozluk, Dariusz Rodkiewicz, Agnieszka Piątkowska, Grzegorz Opolski
BACKGROUND: Development of electroanatomical systems make it possible to perform ablations without the use of fluoroscopy. The aim of this study was to evaluate the efficacy and safety of cryoablation procedures without the use of fluoroscopy. METHODS: The study group consisted of 45 patients (14 female; age 36 ± 15 years) treated with cryoablation using the EnSite electroanatomical system: 10 with ventricular extrasystoly from the right ventricle, 6 with the arrhythmogenic site near the left coronary artery, 17 patients with Wolff-Parkinson-White syndrome (WPW), 2 patients with atrioventricular nodal reentrant tachycardia (AVNRT) type 2, 7 patients with AVNRT type 1, 3 patients with atrial tachycardia...
June 14, 2017: Cardiology Journal
https://www.readbyqxmd.com/read/28612086/comparison-of-6-mm-versus-8-mm-tip-cryoablation-catheter-for-the-treatment-of-atrioventricular-nodal-reentrant-tachycardia-in-children-a-prospective-study
#18
COMPARATIVE STUDY
Volkan Tuzcu, Enes Elvin Gul, Mehmet Karacan, Hacer Kamali, Nida Celik, Celal Akdeniz
Due to its safety profile, cryoablation (Cryo) for atrioventricular nodal reentrant tachycardia (AVNRT) is more commonly preferred over radiofrequency (RF) ablation in children in recent years. Recent studies demonstrated high long-term success rates comparable to radiofrequency ablation. The aim of this prospective study was to compare the efficacy and safety of an 8-mm-tip versus 6-mm-tip Cryo catheter in the treatment of AVNRT in children. A total of 125 consecutive patients over 10 years of age with AVNRT were included...
August 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28462889/radiofrequency-pulmonary-vein-isolation-in-a-patient-with-dextrocardia-with-situs-inversus-totalis
#19
John Meulet, Geoffrey Trim, Ben Hunt, Kang-Teng Lim, Andrew James, Albert Henry, Wayne Pirihi, Paul Davies, Jason Brabant
BACKGROUND: We present a case report of a 67-year-old male with dextrocardia situs inversus totalis and persistent atrial fibrillation who presented for radiofrequency pulmonary vein isolation. METHODS: Pulmonary vein isolation was performed using the St Jude Medical Ensite NavX 3D mapping system with AccuNav ICE guidance. RESULTS: All pulmonary veins were successfully isolated. The procedure time was 125 mins with a fluoroscopy time of 44...
November 19, 2016: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28395996/atrial-fibrillation-ablation-guided-by-a-novel-nonfluoroscopic-navigation-system
#20
Gabriel Ballesteros, Pablo Ramos, Renzo Neglia, Diego Menéndez, Ignacio García-Bolao
INTRODUCTION AND OBJECTIVES: Rhythmia is a new nonfluoroscopic navigation system that is able to create high-density electroanatomic maps. The aim of this study was to describe the acute outcomes of atrial fibrillation (AF) ablation guided by this system, to analyze the volume provided by its electroanatomic map, and to describe its ability to locate pulmonary vein (PV) reconnection gaps in redo procedures. METHODS: This observational study included 62 patients who underwent AF ablation with Rhythmia compared with a retrospective cohort who underwent AF ablation with a conventional nonfluoroscopic navigation system (Ensite Velocity)...
September 2017: Revista Española de Cardiología
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