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https://www.readbyqxmd.com/read/29464341/additional-cryoapplications-at-the-pulmonary-vein-antrum-using-a-28-mm-second-generation-cryoballoon-a-pilot-study-of-extra-pulmonary-vein-ablation
#1
Shinsuke Miyazaki, Takatsugu Kajiyama, Tomonori Watanabe, Sadamitsu Ichijo, Yoshito Iesaka
Isolation areas post-28-mm cryoballoon pulmonary vein isolation (CB-PVI) are smaller than post-radiofrequency PV antrum isolation at the left superior PV (LSPV) antrum and recurrent atrial fibrillation (AF) can originate from this area. This pilot study evaluated the impact of additional extra-PV CB applications at the LSPV antrum following conventional CB-PVI. Eighteen paroxysmal AF patients underwent CB-PVI with single 3-min freeze techniques. Following the CB-PVI, 2-min CB applications were added once or twice at the LSPV antrum...
February 20, 2018: Heart and Vessels
https://www.readbyqxmd.com/read/29449353/ten-year-clinical-outcome-after-circumferential-pulmonary-vein-isolation-utilizing-the-hamburg-approach-in-patients-with-symptomatic-drug-refractory-paroxysmal-atrial-fibrillation
#2
Roland Richard Tilz, Christian-Hendrik Heeger, Alexander Wick, Ardan M Saguner, Andreas Metzner, Andreas Rillig, Peter Wohlmuth, Bruno Reissmann, Christine Lemeš, Tilman Maurer, Francesco Santoro, Johannes Riedl, Christian Sohns, Shibu Mathew, Karl-Heinz Kuck, Feifan Ouyang
BACKGROUND: Circumferential pulmonary vein isolation (CPVI) is increasingly performed for the treatment of symptomatic drug-refractory paroxysmal atrial fibrillation. Long-term data for >10 years after CPVI are sparse. We investigated the long-term clinical outcome and progression of paroxysmal atrial fibrillation after double-lasso and 3-dimensional electroanatomical mapping-guided CPVI. METHODS AND RESULTS: From 2003 to 2004, 161 patients (mean age: 60±10 years) with symptomatic drug-refractory paroxysmal atrial fibrillation were prospectively enrolled and underwent electroanatomical mapping-guided CPVI...
February 2018: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/29420216/myocardial-scar-delineation-using-diffusion-tensor-magnetic-resonance-tractography
#3
Choukri Mekkaoui, Marcel P Jackowski, William J Kostis, Christian T Stoeck, Aravinda Thiagalingam, Timothy G Reese, Vivek Y Reddy, Jeremy N Ruskin, Sebastian Kozerke, David E Sosnovik
BACKGROUND: Late gadolinium enhancement (LGE) is the current standard for myocardial scar delineation. In this study, we introduce the tractographic propagation angle (PA), a metric of myofiber curvature (degrees/unit distance) derived from diffusion tensor imaging (DTI), and compare its use to LGE and invasive scar assessment by endocardial voltage mapping. METHODS AND RESULTS: DTI was performed on 7 healthy human volunteers, 5 patients with myocardial infarction, 6 normal mice, and 7 mice with myocardial infarction...
February 2, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29405366/correlation-of-right-ventricular-multielectrode-endocardial-unipolar-mapping-and-epicardial-scar
#4
Jonathan Chrispin, Ali Keramati, Fabrizio R Assis, Satish Misra, Tarek Zghaib, Ronald D Berger, Hugh Calkins, Harikrishna Tandri
AIMS: Prior studies identified a relationship between epicardial bipolar and endocardial unipolar voltage. Whether the relationship is valid with smaller multielectrode mapping catheters has not been reported. We explored the association of right ventricular (RV) endocardial unipolar voltage mapping with epicardial bipolar voltage mapping using a multielectrode mapping catheter. METHODS: Electrograms from patients who underwent multielectrode endocardial and epicardial RV electroanatomical mapping during ablation procedures were analyzed...
February 6, 2018: Pacing and Clinical Electrophysiology: PACE
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
#5
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)...
January 31, 2018: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/29380921/correlation-between-computer-tomography-derived-scar-topography-and-critical-ablation-sites-in-post-infarction-ventricular-tachycardia
#6
Michael Ghannam, Hubert Cochet, Pierre Jais, Maxime Sermesant, Smita Patel, Konstantinos C Siontis, Fred Morady, Frank Bogun
BACKGROUND: Myocardial wall thickness (WT) in patients with a prior myocardial infarction has been used to indicate scarring. However, the correlation of WT with sites critical to ventricular tachycardia (VT) has not been previously investigated. The purpose of this study was to correlate electroanatomic mapping data obtained during VT ablation with WT determined by cardiac computed tomography (CT). METHODS AND RESULTS: Cardiac CTs were performed in 15 consecutive patients (mean age 63±10 years, 86% male, left ventricular ejection fraction 27±12%) with a prior infarct referred for VT ablation...
January 30, 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29380563/cd34-cell-transplantation-improves-right-ventricular-function-in-patients-with-nonischemic-dilated-cardiomyopathy
#7
Sabina Frljak, Martina Jaklic, Gregor Zemljic, Andraz Cerar, Gregor Poglajen, Bojan Vrtovec
We investigated the effects of CD34+cell therapy on right ventricular (RV) function in patients with nonischemic dilated cardiomyopathy (DCM). We enrolled 60 patients with DCM who were randomized to CD34+cell therapy (Stem Cells (SC) Group n = 30), or no cell therapy (Controls, n = 30). The SC Group received granulocyte-colony stimulating factor, and CD34+cells were collected by apheresis and injected transendocardially. Patients were followed for 6 months. At baseline, the groups did not differ in age, gender, left ventricular ejection fraction, N-terminal probrain natriuretic peptide, or parameters of RV function...
February 2018: Stem Cells Translational Medicine
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
#8
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/29338326/diabetes-mellitus-and-atrial-remodelling-in-patients-with-paroxysmal-atrial-fibrillation-role-of-electroanatomical-mapping-and-catheter-ablation
#9
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
#10
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/29318633/long-term-outcomes-following-cryoablation-of-atrioventricular-nodal-reentrant-tachycardia-in-children
#11
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/29310391/catheter-ablation-of-premature-ventricular-contractions-originating-from-aortic-sinus-cusps-in-a-patient-with-dextrocardia-and-situs-solitus-a-case-report
#12
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/29274801/three-dimentional-electroanatomical-mapping-for-non-pulmonary-vein-foci-in-a-patient-with-complete-situs-inversus-and-dextrocardia
#13
Kentaro Minami, Koji Kumagai, Yoshinao Sugai, Kohki Nakamura, Shigeto Naito, Shigeru Oshima
In patients with atrial fibrillation (AF) having congenital anatomical abnormalities, such as complete situs inversus and dextrocardia, pulmonary vein isolation (PVI) ablation can be performed safety using a three-dimensional electroanatomical mapping system. However, it is not clear whether a three-dimensional electroanatomical mapping system can be used to detect non-PV ectopic beats initiating AF in patients with complete situs inversus and dextrocardia. Here, we report a 21-year-old man with complete situs inversus and dextrocardia, who showed AF caused by non-PV ectopic beats...
December 21, 2017: Indian Pacing and Electrophysiology Journal
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/29250270/high-voltage-guided-pulmonary-vein-isolation-in-paroxysmal-atrial-fibrillation
#15
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/29250264/comparison-of-initial-la-patterns-as-the-road-to-successful-endocardial-box-lesion-ablation
#16
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/29250226/scar-homogenization-in-af-ablation-evolution-and-practice
#17
REVIEW
Minglong Chen
Laboratory studies, histology studies, image studies and the clinical studies all prove the positive correlation between atrial fibrillation and atrial fibrosis from different perspectives. Atrial fibrosis, by separating myocardial cell coupling, diminishing conduction velocity and promoting anisotropic conduction, produce the substrate to sustain atrial fibrillation (AF). These fibrotic areas can be translated into signal abnormalities (low voltage and complex electrgram), and be depicted by electroanatomic high density map...
June 2017: Journal of Atrial Fibrillation
https://www.readbyqxmd.com/read/29226502/s-r-difference-in-v1-v2-is-a-novel-criterion-for-differentiating-the-left-from-right-ventricular-outflow-tract-arrhythmias
#18
Onur Kaypakli, Hasan Koca, Durmus Yıldıray Sahin, Fadime Karataş, Suleyman Ozbicer, Mevlüt Koç
AIM: The correct estimation of the VA origin as RVOT or LVOT results in reduced ablation duration reduced radiation exposure and decreased number of vascular access. In our study, we aimed to detect the predictive value of S-R difference in V1-V2 for differentiating the left from right ventricular outflow tract arrhythmias. METHODS: We included 123 patients with symptomatic frequent premature ventricular outflow tract contractions who underwent successful catheter ablation (70 male, 53 female; mean age 46...
December 10, 2017: Annals of Noninvasive Electrocardiology
https://www.readbyqxmd.com/read/29225871/the-application-of-catheter-ablation-in-a-rare-case-with-coughing-induced-supraventricular-tachyarrhythmias
#19
Xin-Hua Wang, Zheng Li, Ji-Tao Wang, Ben He
Coughing could induce symptomatic, frequent atrial premature contractions (APCs), and episodes of atrial tachycardia (AT) in a rare case. If multiple arrhythmic drugs therapy failed to control the symptoms, catheter ablation was an effective therapeutic option for abolishing such atrial tachyarrhythmias guided by the electroanatomic mapping systems.
December 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/29204351/implantation-of-a-dual-chamber-permanent-pacemaker-in-a-pregnant-patient-guided-by-intracardiac-echocardiography-and-electroanatomic-mapping
#20
Kelvin C M Chua, Eric T S Lim, Daniel T T Chong, Boon Yew Tan, Kah Leng Ho, Chi Keong Ching
No abstract text is available yet for this article.
November 2017: HeartRhythm Case Reports
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