8 results on '"Liu, Xingpeng"'
Search Results
2. Late thromboembolic events after circumferential pulmonary vein ablation of atrial fibrillation
- Author
-
Tao, Hailong, Ma, Changsheng, Dong, Jianzeng, Liu, Xingpeng, Long, Deyong, and Yu, Ronghui
- Published
- 2010
- Full Text
- View/download PDF
3. Long-term efficacy of delayed cure after circumferential pulmonary vein ablation of atrial fibrillation
- Author
-
Tao, Hailong, Dong, Jianzeng, Liu, Xingpeng, Long, Deyong, Yu, Ronghui, Tang, Ribo, Zheng, Bin, Tian, Ying, Zhang, Ming, Shi, Lisheng, He, Hua, and Ma, Changsheng
- Published
- 2008
- Full Text
- View/download PDF
4. Inverse relationship between fractionated electrograms and atrial fibrosis in persistent atrial fibrillation: combined magnetic resonance imaging and high-density mapping
- Author
-
Jadidi, Amir, Cochet, Hubert, Shah, Ashok, Kim, Steven, Duncan, Edward, Miyazaki, Shinsuke, Sermesant, Maxime, Lehrmann, Heiko, Lederlin, Matthieu, Linton, Nick, Forclaz, Andrei, Nault, Isabelle, Rivard, Lena, Wright, Matthew, Liu, Xingpeng, Scherr, Daniel, Wilton, Stephen, Roten, Laurent, Pascale, Patrizio, Derval, Nicolas, Sacher, Frédéric, Knecht, Sebastian, Keyl, Cornelius, Hocini, Mélèze, Montaudon, Michel, Laurent, François, Haïssaguerre, Michel, Jaïs, Pierre, Département de cardiologie, CHU Bordeaux [Bordeaux]-Hôpital Haut-Lévêque [CHU Bordeaux], CHU Bordeaux [Bordeaux], Analysis and Simulation of Biomedical Images (ASCLEPIOS), Inria Sophia Antipolis - Méditerranée (CRISAM), and Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)
- Subjects
Male ,complex fractionated atrial electrogram ,cycle length ,Middle Aged ,Fibrosis ,Magnetic Resonance Imaging ,ablation ,atrial delayed enhancement ,atrial fibrosis ,Catheter Ablation ,Humans ,Female ,atrial fibrillation ,Heart Atria ,Prospective Studies ,Electrophysiologic Techniques, Cardiac ,[SDV.MHEP]Life Sciences [q-bio]/Human health and pathology ,pulmonary vein isolation ,Aged ,MRI - Abstract
ObjectivesThis study sought to evaluate the relationship between fibrosis imaged by delayed-enhancement (DE) magnetic resonance imaging (MRI) and atrial electrograms (Egms) in persistent atrial fibrillation (AF).BackgroundAtrial fractionated Egms are strongly related to slow anisotropic conduction. Their relationship to atrial fibrosis has not yet been investigated.MethodsAtrial high-resolution MRI of 18 patients with persistent AF (11 long-lasting persistent AF) was registered with mapping geometry (NavX electro-anatomical system (version 8.0, St. Jude Medical, St. Paul, Minnesota)). DE areas were categorized as dense or patchy, depending on their DE content. Left atrial Egms during AF were acquired using a high-density, 20-pole catheter (514 ± 77 sites/map). Fractionation, organization/regularity, local mean cycle length (CL), and voltage were analyzed with regard to DE.ResultsPatients with long-lasting persistent versus persistent AF had larger left atrial (LA) surface area (134 ± 38 cm2 vs. 98 ± 9 cm2, p = 0.02), a higher amount of atrial DE (70 ± 16 cm2 vs. 49 ± 10 cm2, p = 0.01), more complex fractionated atrial Egm (CFAE) extent (54 ± 16 cm2 vs. 28 ± 15 cm2, p = 0.02), and a shorter baseline AF CL (147 ± 10 ms vs. 182 ± 14 ms, p = 0.01). Continuous CFAE (CFEmean [NavX algorithm that quantifies Egm fractionation]
- Published
- 2013
- Full Text
- View/download PDF
5. Early Temporal and Spatial Regularization of Persistent Atrial Fibrillation Predicts Termination and Arrhythmia-Free Outcome
- Author
-
Forclaz, Andrei, Narayan, Sanjiv M., Scherr, Daniel, Linton, Nick, Jadidi, Amir S., Nault, Isabelle, Rivard, Lena, Miyazaki, Shinsuke, Uldry, Laurent, Wright, Matthew, Shah, Ashok J, Liu, Xingpeng, Xhaet, Olivier, Derval, Nicolas, Knecht, Sébastien, Sacher, Frédéric, Jaïs, Pierre, Hocini, Mélèze, and Haïssaguerre, Michel
- Subjects
Signal processing ,Male ,medicine.medical_specialty ,Follow-Up ,medicine.medical_treatment ,Activation ,Catheter ablation ,Spectral analysis ,Ablation ,Sensitivity and Specificity ,Article ,Pulmonary vein ,Heart Conduction System ,Predictive Value of Tests ,Recurrence ,Physiology (medical) ,Internal medicine ,Atrial Fibrillation ,Human Heart ,medicine ,Humans ,Coronary sinus ,Electrograms ,Receiver operating characteristic ,business.industry ,Long-Lasting Persistent ,Cycle Length ,Atrial fibrillation ,Middle Aged ,medicine.disease ,Confidence interval ,Frequency-Analysis ,Treatment Outcome ,ROC Curve ,Predictive value of tests ,Cardiology ,Catheter Ablation ,Female ,Cardiology and Cardiovascular Medicine ,business ,Electrophysiologic Techniques, Cardiac ,Organization ,Termination - Abstract
Termination of persistent atrial fibrillation (AF) is a valuable ablation endpoint but is difficult to anticipate. We evaluated whether temporal and spatial indices of AF regularization predict intraprocedural AF termination and outcome.The purpose of this study was to test whether temporospatial organization of AF after pulmonary vein isolation (PVI) predicts whether subsequent stepwise ablation will terminate persistent AF or predict outcome.In 75 patients with persistent AF, we measured AF cycle length (AFCL), temporal regularity index (TRI, a spectral measure of timing regularity), and spatial regularity index (SRI, cycle-to-cycle variations in spatial vector) between right atrial appendage and proximal and distal coronary sinus before and during stepwise ablation to the endpoint of AF termination.AF termination was achieved in 59 patients (79%) by ablation. AF terminated during PVI in 11 patients, who were excluded from analysis. In the remaining 48 patients, TRI and SRI increased during stepwise ablation, as compared with 16 patients without termination (P.05). AFCL was prolonged in both groups. From receiver operating characteristics analysis of the first 22 patients (training set), a post-PVI TRI increase predicted AF termination in the latter 42 patients (test set) with a positive predictive value of 96%, negative predictive value of 53%, sensitivity of 71%, and specificity of 91%. Results were similar for SRI. After 36 months, higher arrhythmia-free outcome was observed in patients in whom PVI caused temporospatial regularization in AF.Temporal and spatial regularization of persistent AF after PVI identifies patients in whom stepwise ablation subsequently terminates AF and prevents recurrence.
- Published
- 2011
6. Single-Catheter Technique for Pulmonary Vein Antrum Isolation: Is It Sufficient to Identify and Close the Residual Gaps Without a Circular Mapping Catheter?
- Author
-
DONG, JIANZENG, LIU, XINGPENG, LONG, DEYONG, YU, RONGHUI, TANG, RIBO, LÜ, FEI, and MA, CHANGSHENG
- Subjects
- *
ATRIAL fibrillation , *PULMONARY veins , *CATHETER ablation , *GENE mapping , *PAROXYSMAL tachycardia - Abstract
Objectives: The present study was designed to investigate the feasibility and efficacy of single ablation catheter for complete circumferential pulmonary vein antrum (PVA) isolation. Background: Complete isolation of pulmonary veins is the mainstay for atrial fibrillation (AF) ablation. This is usually performed under the guidance of a circular catheter. Methods: One hundred and ten consecutive patients with paroxysmal AF were prospectively randomized into two groups: single-catheter approach (group 1) and double-catheter approach (group 2). After performing initial circumferential lesions, residual gaps were mapped and closed with single ablation catheter in group 1 or guided by a circular mapping catheter in group 2 using an electroanatomic mapping system (CARTO™ XP, Biosense-Webster Inc., Diamond Bar, CA, USA). Results: Complete bilateral PVA isolation was achieved in 22 of the 110 patients after initial ablation. All residual gaps could be correctly identified by activation mapping using single ablation catheter. The distribution of these residual gaps was asymmetric. In group 1, 25 gaps along the right PVA lesions and 49 gaps along the left PVA lesions were identified. All the residual gaps were closed with single-catheter approach. In group 2, 28 gaps on the right side and 53 gaps on the left side were identified using a circular catheter and closed with further ablations. The procedure data and clinical outcomes between the two groups were comparable. Conclusions: Single ablation catheter technique is feasible and as effective as circular catheter mapping in localizing the residual gaps for PVA isolation during ablation of paroxysmal AF. [ABSTRACT FROM AUTHOR]
- Published
- 2009
- Full Text
- View/download PDF
7. Complete pulmonary vein isolation guided by three-dimensional electroanatomical mapping for the treatment of paroxysmal atrial fibrillation in patients with hypertrophic obstructive cardiomyopathy.
- Author
-
Liu, Xingpeng, Ouyang, Feifan, Mavrakis, Hercules, Ma, Changsheng, Dong, Jianzeng, Ernst, Sabine, Bänsch, Dietmar, Antz, Matthias, and Kuck, Karl-Heinz
- Abstract
Aims Evaluation of the clinical outcome of patients with hypertrophic obstructive cardiomyopathy (HOCM) and paroxysmal atrial fibrillation (AF) treated with complete pulmonary vein (PV) isolation guided by three-dimensional (3-D) electroanatomical (EA) mapping. Methods Circumferential radiofrequency (RF) ablation and continuous circular lesions (CCLs) around the left and right-sided PVs were performed in 4 highly symptomatic patients (2 males; age 57.5±8.3 years) with HOCM and anti-arrhythmic drug (AAD) refractory paroxysmal AF. Ablation was guided by 3-D EA mapping combined with conventional circumferential PV mapping. The endpoints of the ablation were defined as: (1) absence of all PV spikes documented with the two Lasso catheters within the ipsilateral PVs; and (2) no recurrence of the PV spikes within all PVs following intravenous administration of adenosine. Results The ablation endpoints were achieved in all patients. A repeat ablation was performed in one patient due to repetitive atrial tachycardia, 1 month after the initial procedure. During a follow-up of 5.8±2.7 months, all patients are free of AF recurrence. Short episodes of symptomatic AT were documented after the repeat procedure, and were well controlled with oral amiodarone in the patient. No procedure-related complications were observed. Conclusion The present study demonstrates that complete isolation of ipsilateral PVs guided by 3-D EA mapping is potentially effective for the treatment of highly symptomatic, drug refractory paroxysmal AF in patients with HOCM. [ABSTRACT FROM PUBLISHER]
- Published
- 2005
- Full Text
- View/download PDF
8. Validation of Novel 3-Dimensional Electrocardiographic Mapping of Atrial Tachycardias by Invasive Mapping and Ablation: A Multicenter Study.
- Author
-
Shah, Ashok J., Hocini, Meleze, Xhaet, Olivier, Pascale, Patrizio, Roten, Laurent, Wilton, Stephen B., Linton, Nick, Scherr, Daniel, Miyazaki, Shinsuke, Jadidi, Amir S., Liu, Xingpeng, Forclaz, Andrei, Nault, Isabelle, Rivard, Lena, Pedersen, Michala E.F., Derval, Nicolas, Sacher, Frederic, Knecht, Sebastien, Jais, Pierre, and Dubois, Remi
- Subjects
- *
ELECTROCARDIOGRAPHY , *ABLATION techniques , *TACHYCARDIA diagnosis , *THREE-dimensional imaging , *NONINVASIVE diagnostic tests , *ATRIAL fibrillation diagnosis , *ELECTROPHYSIOLOGY - Abstract
Objectives: This study prospectively evaluated the role of a novel 3-dimensional, noninvasive, beat-by-beat mapping system, Electrocardiographic Mapping (ECM), in facilitating the diagnosis of atrial tachycardias (AT). Background: Conventional 12-lead electrocardiogram, a widely used noninvasive tool in clinical arrhythmia practice, has diagnostic limitations. Methods: Various AT (de novo and post-atrial fibrillation ablation) were mapped using ECM followed by standard-of-care electrophysiological mapping and ablation in 52 patients. The ECM consisted of recording body surface electrograms from a 252-electrode-vest placed on the torso combined with computed tomography–scan-based biatrial anatomy (CardioInsight Inc., Cleveland, Ohio). We evaluated the feasibility of this system in defining the mechanism of AT—macro–re-entrant (perimitral, cavotricuspid isthmus-dependent, and roof-dependent circuits) versus centrifugal (focal-source) activation—and the location of arrhythmia in centrifugal AT. The accuracy of the noninvasive diagnosis and detection of ablation targets was evaluated vis-à-vis subsequent invasive mapping and successful ablation. Results: Comparison between ECM and electrophysiological diagnosis could be accomplished in 48 patients (48 AT) but was not possible in 4 patients where the AT mechanism changed to another AT (n = 1), atrial fibrillation (n = 1), or sinus rhythm (n = 2) during the electrophysiological procedure. ECM correctly diagnosed AT mechanisms in 44 of 48 (92%) AT: macro–re-entry in 23 of 27; and focal-onset with centrifugal activation in 21 of 21. The region of interest for focal AT perfectly matched in 21 of 21 (100%) AT. The 2:1 ventricular conduction and low-amplitude P waves challenged the diagnosis of 4 of 27 macro–re-entrant (perimitral) AT that can be overcome by injecting atrioventricular node blockers and signal averaging, respectively. Conclusions: This prospective multicenter series shows a high success rate of ECM in accurately diagnosing the mechanism of AT and the location of focal arrhythmia. Intraprocedural use of the system and its application to atrial fibrillation mapping is under way. [ABSTRACT FROM AUTHOR]
- Published
- 2013
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.