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Catheter Mapping

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https://www.readbyqxmd.com/read/29346552/safety-profile-of-near-zero-fluoroscopy-atrial-fibrillation-ablation-with-non-fluoroscopic-catheter-visualization-experience-from-1000-consecutive-procedures
#1
Philipp Sommer, Livio Bertagnolli, Simon Kircher, Arash Arya, Andreas Bollmann, Sergio Richter, Sascha Rolf, Gerhard Hindricks
Aims: Efforts to reduce radiation exposure during catheter ablation procedures have included the use of various technological measures. Significant results have been achieved to the point where near lead-free procedures in routine clinical practice has become a realistic goal. The integration of MediGuide technology [non-fluoroscopic catheter visualization technology (NFCV)] and three-dimensional electroanatomical mapping is one of the methods developed in response to radiation reduction initiatives...
January 16, 2018: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/29341322/isthmus-sites-identified-by-ripple-mapping-are-usually-anatomically-stable-a-novel-method-to-guide-atrial-substrate-ablation
#2
Vishal Luther, Norman Qureshi, Phang Boon Lim, Michael Koa-Wing, Shahnaz Jamil-Copley, Fu Siong Ng, Zachary Whinnett, D Wyn Davies, Nicholas S Peters, Prapa Kanagaratnam, Nick Linton
BACKGROUND: Post ablation reentrant ATs depend upon conducting isthmuses bordered by scar. Bipolar voltage maps highlight scar as sites of low voltage, but the voltage amplitude of an electrogram depends upon the myocardial activation sequence. Furthermore, a voltage threshold that defines atrial scar is unknown. We used Ripple Mapping (RM) to test whether these isthmuses were anatomically fixed between different activation vectors and atrial rates. METHODS: We studied post-AF ablation ATs where > 1 rhythm was mapped...
January 17, 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29340161/direct-ice-imaging-from-inside-the-left-atrial-appendage-during-ablation-of-persistent-atrial-fibrillation
#3
Gabriel Cismaru, Mihai Puiu, Radu Rosu, Lucian Muresan, Gabriel Gusetu, Dana Pop, Dumitru Zdrenghea
We present the case of a 59-year-old patient with persistent atrial fibrillation, referred for atrial fibrillation ablation. The procedure was performed with the help of NAVX 3D mapping system (Saint Jude Medical) and iLAB Ultra ICE Plus ultrasound imaging catheter (Boston Scientific). The catheter permits cross-sectional images perpendicular to catheter's long axis. From inside left atrial appendage (LAA) looks trabeculated, due to pectinate muscles running parallel to each other. The presence of a thrombus was excluded from the appendage...
January 2018: Oxford Medical Case Reports
https://www.readbyqxmd.com/read/29338326/diabetes-mellitus-and-atrial-remodelling-in-patients-with-paroxysmal-atrial-fibrillation-role-of-electroanatomical-mapping-and-catheter-ablation
#4
Domenico Grieco, Zefferino Palamà, Alessio Borrelli, Ermenegildo De Ruvo, Luigi Sciarra, Antonio Scarà, Emilia Goanta, Vito Calabrese, Paolo Pozzilli, Germano Di Sciascio, Leonardo Calò
Complex fractionated atrial electrograms (CFAEs) are related to atrial fibrosis, but their ablation has not yet shown superiority. The aim of the study was to compare, in terms of clinical outcome, two strategies of paroxysmal atrial fibrillation (AF) ablation in patients with type 1 diabetes mellitus (DM): pulmonary vein isolation (PVI) vs. PVI + CFAEs. Compared to an historical population of patient with paroxysmal AF and without DM, a higher percentage of patients with DM showed more than 25% of atrial area interested by CFAEs (study population, 58% vs historical group, 15%; p < 0...
January 1, 2018: Diabetes & Vascular Disease Research
https://www.readbyqxmd.com/read/29333794/ablation-induced-change-in-the-course-of-fascicular-tachycardia
#5
Avishag Laish-Farkash, Avi Sabbag, Michael Glikson, Aharon Glick, Vladimir Khalameizer, Amos Katz, Yoav Michowitz
BACKGROUND: Multiform fascicular tachycardia (FT) was recently described as a ventricular tachycardia (VT) that has a reentrant mechanism using multiple fascicular branches and produces alternate fascicular VT forms. Ablating the respective fascicle may cause a change in the reentrant circuit resulting in a change in morphology. Ablation of the septal fascicle is crucial for successful treatment. OBJECTIVES: To describe four cases of FT in which ablation induced a change in QRS morphologies and aggravated clinical course...
January 2018: Israel Medical Association Journal: IMAJ
https://www.readbyqxmd.com/read/29330332/identification-and-characterization-of-sites-where-persistent-atrial-fibrillation-is-terminated-by-localized-ablation
#6
Junaid A B Zaman, William H Sauer, Mahmood I Alhusseini, Tina Baykaner, Ryan T Borne, Christopher A B Kowalewski, Sonia Busch, Paul C Zei, Shirley Park, Mohan N Viswanathan, Paul J Wang, Johannes Brachmann, David E Krummen, John M Miller, Wouter Jan Rappel, Sanjiv M Narayan, Nicholas S Peters
BACKGROUND: The mechanisms by which persistent atrial fibrillation (AF) terminates via localized ablation are not well understood. To address the hypothesis that sites where localized ablation terminates persistent AF have characteristics identifiable with activation mapping during AF, we systematically examined activation patterns acquired only in cases of unequivocal termination by ablation. METHODS AND RESULTS: We recruited 57 patients with persistent AF undergoing ablation, in whom localized ablation terminated AF to sinus rhythm or organized tachycardia...
January 2018: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/29326128/idiopathic-ventricular-arrhythmias-originating-from-the-vicinity-of-the-communicating-vein-of-cardiac-venous-systems-at-the-left-ventricular-summit
#7
Yuki Komatsu, Akihiko Nogami, Yasutoshi Shinoda, Keita Masuda, Takeshi Machino, Kenji Kuroki, Hiro Yamasaki, Yukio Sekiguchi, Kazutaka Aonuma
BACKGROUND: The communicating vein (CV) between the great cardiac vein and small cardiac venous systems passes between the aortic and pulmonary annulus and is located in close association with the left ventricular summit (summit CV). METHODS AND RESULTS: Thirty-one patients with idiopathic ventricular arrhythmias (VAs) underwent mapping of the left ventricular summit by using a 2F microcatheter introduced into the summit CV with coronary sinus venographic guidance...
January 2018: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/29317972/high-density-mapping-in-ventricular-tachycardia-ablation-a-pentaray%C3%A2-study
#8
Petra Maagh, Arnd Christoph, Henning Dopp, Markus Sebastian Mueller, Gunnar Plehn, Axel Meissner
Background: High-density mapping of ventricular tachycardia (VT) with PentaRay® (Biosense-Webster) provides high resolution with discrimination of local abnormal electrograms and slow conducting channels. We evaluate the feasibility of PentaRay® to characterize the anatomical substrate and assume an influence of the outcome despite limitations. Methods: Over a 24-month period, 26 endocardial and four epicardial maps were obtained of 26 VT patients (18 ischemic cardiomyopathy (ICM, 69...
December 2017: Cardiology Research
https://www.readbyqxmd.com/read/29315991/efficacy-of-catheter-ablation-of-focal-sources-in-persistent-atrial-fibrillation
#9
Yoshihide Takahashi, Syu Yamashita, Masahito Suzuki, Kento Yabe, Kenzo Hirao
INTRODUCTION: Recent studies suggest that atrial fibrillation (AF) is maintained by electrical activity arising from focal sources. We sought to test whether catheter ablation that targets focal sources can improve on current ablation protocols for persistent AF. METHODS AND RESULTS: In patients with persistent AF whose AF did not terminate with pulmonary vein isolation, the left atrium was mapped with a 20-pole high-density mapping catheter using CARTO®3 navigation...
January 9, 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29310391/catheter-ablation-of-premature-ventricular-contractions-originating-from-aortic-sinus-cusps-in-a-patient-with-dextrocardia-and-situs-solitus-a-case-report
#10
Chao-Feng Chen, Xiao-Hua Liu, Xiao-Fei Gao, Bin Chen, Yi-Zhou Xu
BACKGROUND: Premature ventricular contractions (PVCs) originating from aortic sinus cusps is not infrequent and can be eliminated effectively by radiofrequency ablation with rare complications. However, after a review of the medical literature, and to our knowledge, this is the first case of successful idiopathic aortic sinus cusps-PVC-ablation using a 3-dimensional (3D) mapping system in an adult with dextrocardia. METHODS: A 62-year-old male with dextrocardia and situs inversus underwent catheter ablation of frequent PVCs...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29279459/does-size-matter-cryoballoon-based-pulmonary-vein-isolation-using-a-novel-25-mm-circular-mapping-catheter
#11
Bruno Reissmann, Michael Schlüter, Francesco Santoro, Tilman Maurer, Christian-Hendrik Heeger, Christine Lemes, Thomas Fink, Johannes Riedl, Andreas Rillig, Shibu Mathew, Feifan Ouyang, Karl-Heinz Kuck, Andreas Metzner
BACKGROUND: Real-time recording of pulmonary vein isolation (PVI) using a circular mapping catheter has become a key aspect of cryoballoon (CB) ablation. The aim of this study was to investigate the procedural safety, efficacy and rate of real-time pulmonary vein (PV) recording using a novel circular mapping catheter with a 25-mm loop size for CB-based PVI.Methods and Results:A total of 40 patients with symptomatic atrial fibrillation (AF) underwent PVI using a second-generation CB and a novel 25-mm circular mapping catheter...
December 27, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/29277686/accurate-localization-and-catheter-ablation-of-superoparaseptal-accessory-pathways
#12
Qiang Liu, Michael Shehata, David Z Lan, Ashkan Ehdaie, Eugenio Cingolani, Sumeet S Chugh, Guosheng Fu, Chenyang Jiang, Xunzhang Wang
BACKGROUND: There remains some confusion delineating the accurate location and the detailed anatomic relationship between atrioventricular accessory pathways (APs) located in the superoparaseptal region. OBJECTIVE: To detail the anatomic relationship and accurate location of APs located in the superoparaseptal region. METHODS: Between 2009 and 2016, 11 patients with superoparaseptal accessory pathways (SPS-APs) were identified in 129 consecutive patients who underwent catheter ablation for APs in our center...
December 22, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29250297/pulmonary-vein-isolation-with-the-multipolar-nmarq%C3%A2-ablation-catheter-efficacy-and-safety-in-acute-and-long-term-follow-up
#13
REVIEW
Siebermair Johannes, Michelle Silver, Wakili Reza
Pulmonary vein isolation (PVI) is an established therapy for atrial fibrillation (AF). One challenge in the catheter-based treatment of this arrhythmia is to develop an effective and safe ablation approach to achieve durable and consistent lesions around the PVs. The multipolar irrigated radiofrequency (RF) ablation catheter nMARQTM was designed as a single-shot device with the aim to achieve these goals. This article reviews the current literature with respect to acute- and long- term success rates after PVI with this circular mapping and ablation device...
April 2017: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/29250296/focal-atrial-fibrillation-from-the-superior-vena-cava
#14
Andres Enriquez, Jackson J Liang, Pasquale Santangeli, Francis E Marchlinski, Michael P Riley
We report the case of a 66 year-old male who underwent catheter ablation for drug-refractory paroxysmal atrial fibrillation (AF) at our institution. Radiofrequency catheter ablation was performed using a three-dimensional electroanatomical mapping system. During ablation of the pulmonary veins (PV), right atrial ectopics were noted to repeatedly trigger AF and atrial tachycardia (AT). After PV isolation, mapping of the right atrium revealed that the superior vena cava (SVC) was in AF, while both atria were in an organized AT...
April 2017: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/29250295/early-pulmonary-vein-conduction-recovery-after-catheter-ablation-of-atrial-fibrillation
#15
Ayman Mortada, Saeed Khaled, Samir Wafa, Hayam Eldamanhoury, Ahmed Nabil
Background: Pulmonary vein electrical isolation (PVI) is an effective treatment for atrial fibrillation (AF). However, recurrence of pulmonary vein (PV) conduction after ablation may limit long-term success. Early identification and treatment of acute PV conduction recovery during initial ablation may have an impact on subsequent clinical results. Objective: To assess the prevalence of acute PV conduction recovery during the observation time after PV isolation for paroxysmal AF, and to evaluate the impact of re-isolation treatment on long-term clinical results...
April 2017: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/29250292/comparison-of-the-efficacy-of-pvac%C3%A2-and-nmarq%C3%A2-for-paroxysmal-atrial-fibrillation
#16
REVIEW
Avishag Laish-Farkash, Mahmoud Suleiman
Pulmonary vein isolation (PVI) has become the mainstay of therapy for atrial fibrillation (AF) and one of the most frequently performed procedures in the cardiac electrophysiology laboratory. PVI by a single-tip radiofrequency (RF) ablation catheter remains a complex and time-consuming procedure, especially in centers with limited experience. In order to simplify the PVI procedure, to shorten it and reduce the complication rate, circular multi-electrode catheters were introduced for simultaneous mapping and ablation...
April 2017: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/29250264/comparison-of-initial-la-patterns-as-the-road-to-successful-endocardial-box-lesion-ablation
#17
Aleksei S Kovalev, Leo A Bockeria, Andrey G Filatov
Atrial fibrillation (AF) is the most common arrhythmia in the population. Still there is no unity in understanding of mechanisms and their influence on catheter ablation results. In our study we tried to evaluate accurate initial quantitative indicators of electromechanical remodeling that can border patients from expected good to expected poor results of catheter ablation. We performed electroanatomical mapping and ablation procedures in 94 patient (45 female) in 2012 with 3-year follow-up period. The target points were left atria surface area, complex fragmentation atrial electrograms (CFAE) duration and surface area...
February 2017: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/29250231/laser-catheter-ablation-of-long-lasting-persistent-atrial-fibrillation-longterm-results
#18
Helmut Weber, Michaela Sagerer-Gerhardt, Armin Heinze
Catheter ablation of atrial fibrillation (AF) is a current therapeutic option but its efficacy for the treatment of long-lasting persistent AF (l-lpAF) remains suboptimal. We tested the laser method as an alternative for catheter ablation of l-lpAF by using an open-irrigated electrode laser mapping and ablation (ELMA) catheter. Laser ablation was attempted in 48 patients aged 50-81 years (69 ± 7.6 y, female = 28) with drug resistant (3.5 trials) l-lpAF (≥12 months). All of the patients had comorbidities: congestive heart failure NYHA II-III (100%), hypertension 29 (60%), coronary artery disease 19 (40%), and heart valve defect 17 (35%)...
August 2017: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/29248696/vasodilator-and-hypotensive-effects-of-the-spider-peptide-lycosin-i-in-vitro-and-in-vivo
#19
Binbin Ma, Zhouhuan Xi, Jiahui Li, Tianqi Gao, Runzhi Liao, Shuhang Wang, Xianyao Li, Yaqin Tang, Zheng Wang, Shengjie Hou, Jinying Jiang, Meichun Deng, Zhigui Duan, Xing Tang, Liping Jiang
Lycosin-I, a spider peptide isolated from the venom of the spider Lycosa singoriensis, has anti-bacteria and anti-cancer properties in organisms. However, cardiovascular effects of Lycosin-I have not been studied. In this study, we investigated for the first time the vasodilator and hypotensive effects of Lycosin-I and the possible mechanisms, in order to develop a promising treatment for hypertension-related diseases. For in vitro experiments, thoracic aortas were isolated, and divided into two groups, endothelium-intact and endothelium-denuded aortic rings...
December 14, 2017: Peptides
https://www.readbyqxmd.com/read/29247032/thromboembolic-risks-of-the-procedural-process-in-second-generation-cryoballoon-ablation-procedures-analysis-from-real-time-transcranial-doppler-monitoring
#20
Shinsuke Miyazaki, Tomonori Watanabe, Takatsugu Kajiyama, Jin Iwasawa, Sadamitsu Ichijo, Hiroaki Nakamura, Hiroshi Taniguchi, Kenzo Hirao, Yoshito Iesaka
BACKGROUND: Atrial fibrillation ablation is associated with substantial risks of silent cerebral events (SCEs) or silent cerebral lesions. We investigated which procedural processes during cryoballoon procedures carried a risk. METHODS AND RESULTS: Forty paroxysmal atrial fibrillation patients underwent pulmonary vein isolation using second-generation cryoballoons with single 28-mm balloon 3-minute freeze techniques. Microembolic signals (MESs) were monitored by transcranial Doppler throughout all procedures...
December 2017: Circulation. Arrhythmia and Electrophysiology
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