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https://www.readbyqxmd.com/read/29081135/-study-on-the-three-dimensional-mapping-to-reduce-the-x-ray-exposure-dose-of-interventional-doctors-in-radiofrequency-catheter-ablation-of-atrioventricular-nodal-reentry-tachycardia
#1
R Wang, N Zhang, R H Wang, J Gao, Z Q Zhao, Y P Jia, M Sun
Objective: To explore the advantage of radiofrequency catheter ablation under the three-dimensional mapping in the treatment of atrioventricular nodal reentrant tachycardia (AVNRT) in reducing the X-ray exposure dose of interventional doctors. Methods: 79 patients with AVNRT, in the first hospital of Shanxi Medical University from January 2015 to June 2016, performed to do radiofrequency catheter ablation treatment were selected, and according to the random number method were divided into two-dimensional mapping group and three-dimensional mapping group...
August 20, 2017: Chinese Journal of Industrial Hygiene and Occupational Diseases
https://www.readbyqxmd.com/read/29059485/clinical-assessment-and-comparison-of-annotation-algorithms-in-high-density-mapping-of-regular-atrial-tachycardias
#2
Jan De Pooter, Milad El Haddad, Michael Wolf, Thomas Phlips, Frederic van Heuverswyn, Liesbeth Timmers, René Tavernier, Sebastien Knecht, Yves Vandekerckhove, Mattias Duytschaever
BACKGROUND: High-density automated mapping of regular atrial tachycardias (AT) requires accurate assessment of local activation times (LAT). OBJECTIVE: To evaluate high density mapping of ATs and compare the accuracy of different automated LAT annotation algorithms. METHODS: Fifteen patients underwent AT ablation guided by the automated ConfiDENSEۛ high-density mapping module (Carto 3 v4) allowing manual reannotation (edited maps). For each AT, unedited automated maps were re-constructed offline by three algorithms: maximum unipolar slope (LATSlope ), bipolar peak (LATPeak ) and a new hybrid annotation algorithm (LATHybrid )...
October 23, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28976307/three-dimensional-noninvasive-imaging-of-ventricular-arrhythmias-in-patients-with-premature-ventricular-contractions
#3
Long Yu, Qi Jin, Zhaoye Zhou, Liqun Wu, Bin He
OBJECTIVE: Noninvasive imaging of cardiac electrical activity promises to provide important information regarding the underlying arrhythmic substrates for successful ablation intervention and further understanding of the mechanism of such lethal disease. The aim of this study is to evaluate the performance of a novel three-dimensional (3D) cardiac activation imaging technique to noninvasively localize and image origins of focal ventricular arrhythmias in patients undergoing radio frequency ablation...
October 2, 2017: IEEE Transactions on Bio-medical Engineering
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
#4
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...
September 1, 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28846152/ablation-of-the-vanishing-pvc-facilitated-by-quantitative-morphology-matching-software
#5
Jeffrey P Moak, Kohei Sumihara, Jonathan Swink, Sridhar Hanumanthaiah, Charles I Berul
BACKGROUND: Ablation of cardiac arrhythmias in children and teenagers often necessitates the use of anesthesia, which can suppress ventricular arrhythmias (VAs), making it difficult to map the site of origin using activation time (AT). Pace mapping, a technique employed to assist with VA origin localization, depends on subjective comparison of paced and targeted QRS morphology. We assessed the utility of a quantitative approach to paced QRS to VA morphology matching using the PaSo software (Carto 3, Biosense Webster), to localize the VA site of origin...
August 28, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28776822/ripple-mapping-initial-multicenter-experience-of-an-intuitive-approach-to-overcoming-the-limitations-of-3d-activation-mapping
#6
Vishal Luther, Nuno Cortez-Dias, Luís Carpinteiro, João de Sousa, Richard Balasubramaniam, Sharad Agarwal, David Farwell, Mark Sopher, Girish Babu, Richard Till, Nikki Jones, Stuart Tan, Anthony Chow, Martin Lowe, Jem Lane, Naveen Pappachan, Nicholas Linton, Prapa Kanagaratnam
BACKGROUND: Ripple mapping (RM) displays electrograms as moving bars over a three-dimensional surface displaying bipolar voltage, and has shown in a single-center series to be effective for atrial tachycardia (AT) mapping without annotation of local activation time or window-of-interest assignment. We tested the reproducibility of these findings in operators naïve to RM, using it for the first time in postablation AT. METHODS: Maps were collected with multielectrode catheters and CARTO ConfiDENSE...
November 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28543607/successful-ablation-of-a-right-atrium-axillary-ventricular-accessory-pathway-associated-with-wolff-parkinson-white-syndrome
#7
Yuan Yuan, Deyong Long, Jianzeng Dong, Ling Tao, Changsheng Ma
We report a case of a patient with right axillary ventricular. Similar congenital anomaly of the right atrium was reported as "right appendage diverticulum or right atrial diverticulum". However, this independent chamber has its own annulus, synchronizes with the right ventricular, and generates large ventricular potential. Under the guidance of CARTO mapping system, a right atrioventricular accessory pathway associated with Type B Wolff-Parkinson-White syndrome was ablated successfully. This pathway was close to the annulus of the axillary ventricular...
May 24, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/28370919/an-automatic-and-accurate-registration-method-for-electro-anatomical-map-and-ct-surface
#8
Lixia Shu, Jin Wang, Deyong Long, Changyan Lin
BACKGROUND: Electro-anatomical maps (EAM) and CT surface registration are widely used for catheter navigation in atrial fibrillation ablations. However, few studies have investigated the registration algorithm. Moreover, some of them are semiautomatic, so that physicians must be proficient; some are inaccurate for catheter navigation. A both automatic and accurate registration method is needed. METHOD: A Hausdorff distance based approach (HD) was proposed for EAM/CT registration...
March 29, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28343787/relationship-between-rotors-and-complex-fractionated-electrograms-in-atrial-fibrillation-using-a-novel-computational-analysis
#9
Pedro Adragão, Pedro Carmo, Diogo Cavaco, João Carmo, António Ferreira, Francisco Moscoso Costa, Maria Salomé Carvalho, João Mesquita, Rita Quaresma, Francisco Belo Morgado, Miguel Mendes
INTRODUCTION: Rotors and complex fractionated atrial electrograms (CFAEs) have been suggested as possible therapeutic targets in ablation of atrial fibrillation (AF). The aim of this study was to assess the relationship between rotors and CFAEs in patients with AF. METHODS: We studied 18 patients with AF (mean age 69±8 years, 33% female) who underwent rotor ablation and pulmonary vein isolation. Endocardial mapping was performed with a basket catheter to identify the presence, number and location of rotors and CFAEs...
April 2017: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/28318819/slow-pathway-radiofrequency-ablation-using-magnetic-navigation-a-description-of-technique-and-retrospective-case-analysis
#10
Abhishek Bhaskaran, Maha Albarri, Neil Ross, Sara Al Raisi, Rahul Samanta, Leonette Roode, Fazlur Nadri, Jeanette Ng, Stuart Thomas, Aravinda Thiagalingam, Pramesh Kovoor
BACKGROUND: The Magnetic Navigation System (MNS) catheter was shown to be stable in the presence of significant cardiac wall motion and delivered more effective lesions compared to manual control. This stability could potentially make AV junctional reentrant tachycardia (AVNRT) ablation safer. The aim of this study is to describe the method of mapping and ablation of AVNRT with MNS and 3-D electro-anatomical mapping system (CARTO, Biosense Webster, Diamond bar, CA, USA) anatomical mapping, with a view to improve the safety of ablation...
February 21, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28063269/novel-mapping-technique-for-localization-of-focal-and-reentrant-activation-during-atrial-fibrillation
#11
Yoshihide Takahashi, Shinsuke Iwai, Syu Yamashita, Mayumi Masumura, Masahito Suzuki, Kento Yabe, Yasuhiro Sato, Kenzo Hirao, Mitsuaki Isobe
INTRODUCTION: Identification of wavefront propagation pattern during AF remains challenging in ablation procedures. We sought to test a novel combination of a new mapping technology called Ripple Map and high-density mapping to distinguish focal and reentrant activation during atrial fibrillation (AF). METHODS AND RESULTS: Subjects were patients undergoing ablation for persistent AF. If AF remained after isolation of the pulmonary veins, the left atrium (LA) was mapped by a high-density mapping catheter for later analysis, after which ablation was continued using a conventional stepwise approach...
April 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28054727/direct-comparison-of-point-by-point-and-rapid-ultra-high-resolution-electroanatomical-mapping-in-patients-scheduled-for-ablation-of-atrial-fibrillation
#12
Laura Rottner, Andreas Metzner, Feifan Ouyang, Christian Heeger, Kentaro Hayashi, Thomas Fink, Christine Lemes, Shibu Mathew, Tilman Maurer, Bruno REIßMANN, Enida Rexha, Johannes Riedl, Ardan M Saguner, Francesco Santoro, Karl-Heinz Kuck, Christian Sohns
INTRODUCTION: Three-dimensional electroanatomical mapping (EAM) is an established tool facilitating catheter ablation. In this context, the novel Rhythmia system sets a new bar in fast high-resolution mapping. The aim of this study was to directly compare point-by-point versus rapid ultra-high-resolution EAM in patients scheduled for ablation of atrial fibrillation (AF) with focus on procedural data, acute success, and midterm clinical outcome. METHODS AND RESULTS: A total number of 74 consecutive patients (48/74 male) with symptomatic AF were scheduled to undergo pulmonary vein isolation (PVI) using either Carto or Rhythmia...
March 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/28045674/play-the-map-ablation-of-a-macro-reentrant-atrial-tachycardia-in-a-patient-after-senning-repair-for-transposition-of-the-great-arteries
#13
Emre Yalcinkaya, Firat Duru, Matthias Greutmann, Thomas Wolber
A 50-year-old male patient who had undergone Senning repair for transposition of the great arteries at the age of 7 years was referred to our electrophysiology lab with recurrent supraventricular tachycardias. Fast anatomical mapping of the systemic venous atrium was performed with the CARTO electroanatomical mapping system. Propagation mapping with animated dynamic maps facilitates the understanding of the underlying mechanism and provides visualization of reentrant circuits of tachycardias in cardiac chambers with native barriers and surgical scars...
January 2017: Journal of Invasive Cardiology
https://www.readbyqxmd.com/read/28026917/voltage-combined-with-pace-mapping-is-simple-and-effective-for-ablation-of-noninducible-premature-ventricular-contractions-originating-from-the-right-ventricular-outflow-tract
#14
Zefeng Wang, Heping Zhang, Hui Peng, Xuhua Shen, Zhijun Sun, Can Zhao, Ruiqing Dong, Huikuan Gao, Yongquan Wu
BACKGROUND: Premature ventricular contractions (PVCs) from the right ventricular outflow tract (RVOT) can resist conventional mapping strategies. Studies regarding optimal mapping and ablation methods for patients with noninducible RVOT-PVCs are limited. We retrospectively evaluated the efficacy and safety of a novel mapping strategy for these cases: voltage mapping combined with pace mapping. HYPOTHESIS: METHODS: We retrospectively included symptomatic patients (n = 148; 76 males; age, 44...
December 2016: Clinical Cardiology
https://www.readbyqxmd.com/read/28018976/identifying-the-third-dimension-in-2d-fluoroscopy-to-create-3d-cardiac-maps
#15
Jasbir Sra, David Krum, Indrajit Choudhuri, Barry Belanger, Mark Palma, Donald Brodnick, Daniel B Rowe
Three-dimensional cardiac mapping is important for optimal visualization of the heart during cardiac ablation for the treatment of certain arrhythmias. However, many hospitals and clinics worldwide cannot afford the high cost of the current mapping systems. We set out to determine if, using predefined algorithms, comparable 3D cardiac maps could be created by a new device that relies on data generated from single-plane fluoroscopy and patient recording and monitoring systems, without the need for costly equipment, infrastructure changes, or specialized catheters...
December 22, 2016: JCI Insight
https://www.readbyqxmd.com/read/27982678/disparity-between-two-dimensional-echocardiographic-and-electroanatomic-left-and-right-atrial-volumes-in-patients-undergoing-catheter-ablation-for-long-standing-persistent-atrial-fibrillation
#16
L Škňouřil, Š Havránek, V Bulková, M Dorda, T Paleček, J Šimek, Z Fingrová, A Linhart, J Januška, D Wichterle, M Fiala
Left atrial (LA) volume (LAV) is used for the selection of patients with atrial fibrillation (AF) to rhythm control strategies. Calculation of LAV from the LA diameters and areas by two-dimensional (2D) echocardiography may result in significant error. Accuracy of atrial volume assessment has never been studied in patients with long-standing persistent AF (LSPAF) and significant atrial remodeling. This study investigated correlation and agreement between 2D echocardiographic (Simpson method) and electroanatomic (CARTO, Biosense Webster) left and right atrial (RA) volumes (LAV(ECHO) vs...
May 4, 2017: Physiological Research
https://www.readbyqxmd.com/read/27763695/use-of-new-imaging-carto%C3%A2-segmentation-module-software-to-facilitate-ablation-of-ventricular-arrhythmias
#17
Oholi Tovia-Brodie, Bernard Belhassen, Aharon Glick, Haim Shmilovich, Galit Aviram, Raphael Rosso, Yoav Michowitz
INTRODUCTION: A new imaging software (CARTO® Segmentation Module, Biosense Webster) allows preprocedural 3-D reconstruction of all heart chambers based on cardiac CT. We describe our initial experience with the new module during ablation of ventricular arrhythmias. METHODS AND RESULTS: Eighteen consecutive patients with idiopathic ventricular arrhythmias or ischemic ventricular tachycardia (VT) were studied. In the latter group, a combined endocardial and epicardial ablation was performed...
February 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/27762474/accuracy-of-voltage-signal-measurement-during-radiofrequency-delivery-through-the-smarttouch-catheter
#18
Payam Safavi-Naeini, Dreema Zafar-Awan, Hongjian Zhu, Gerardo Zablah, Anand V Ganapathy, Abdi Rasekh, Mohammad Saeed, Joanna Esther Molina Razavi, Mehdi Razavi
INTRODUCTION: Current methods for measuring voltage during radiofrequency (RF) ablation (RFA) necessitate turning off the ablation catheter. If voltage could be accurately read without signal attenuation during RFA, turning off the catheter would be unnecessary, allowing continuous ablation. We evaluated the accuracy of the Thermocool SMARTTOUCH catheter for measuring voltage while RF traverses the catheter. METHODS AND RESULTS: We studied 26 patients undergoing RFA for arrhythmias...
January 2017: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/27706179/noninvasive-imaging-of-human-atrial-activation-during-atrial-flutter-and-normal-rhythm-from-body-surface-potential-maps
#19
Zhaoye Zhou, Qi Jin, Long Yu, Liqun Wu, Bin He
BACKGROUND: Knowledge of atrial electrophysiological properties is crucial for clinical intervention of atrial arrhythmias and the investigation of the underlying mechanism. This study aims to evaluate the feasibility of a novel noninvasive cardiac electrical imaging technique in imaging bi-atrial activation sequences from body surface potential maps (BSPMs). METHODS: The study includes 7 subjects, with 3 atrial flutter patients, and 4 healthy subjects with normal atrial activations...
2016: PloS One
https://www.readbyqxmd.com/read/27307519/a-prospective-study-of-ripple-mapping-the-post-infarct-ventricular-scar-to-guide-substrate-ablation-for-ventricular-tachycardia
#20
Vishal Luther, Nick W F Linton, Shahnaz Jamil-Copley, Michael Koa-Wing, Phang Boon Lim, Norman Qureshi, Fu Siong Ng, Sajad Hayat, Zachary Whinnett, D Wyn Davies, Nicholas S Peters, Prapa Kanagaratnam
BACKGROUND: Post-infarct ventricular tachycardia is associated with channels of surviving myocardium within scar characterized by fractionated and low-amplitude signals usually occurring late during sinus rhythm. Conventional automated algorithms for 3-dimensional electro-anatomic mapping cannot differentiate the delayed local signal of conduction within the scar from the initial far-field signal generated by surrounding healthy tissue. Ripple mapping displays every deflection of an electrogram, thereby providing fully informative activation sequences...
June 2016: Circulation. Arrhythmia and Electrophysiology
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