43,912 results match your criteria Catheter Ablation


Temperature-controlled high-power short-duration ablation with 90 W for 4 s: outcome, safety, biophysical characteristics and cranial MRI findings in patients undergoing pulmonary vein isolation.

J Interv Card Electrophysiol 2022 Jun 24. Epub 2022 Jun 24.

Department of Electrophysiology, German Heart Center Munich, Technische Universitaet Munich, Lazarettstr. 36, 80636, Munich, Germany.

Background: High-power short-duration (HPSD) radiofrequency ablation (RFA) is highly efficient and safe while reducing procedure and RF time in pulmonary vein isolation (PVI). The QDot™ catheter is a novel contact force ablation catheter that allows automated flow and power adjustments depending on the local tissue temperature to maintain a target temperature during 90 W/4 s lesions. We analysed intraprocedural data and periprocedural safety using the QDot-catheter in patients undergoing PVI for paroxysmal atrial fibrillation (PAF). Read More

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Mechanistic vs. empirical ablation of atria during repeat ablation for atrial arrhythmias despite effective pulmonary vein isolation.

Authors:
Ugur Canpolat

J Cardiovasc Electrophysiol 2022 Jun 24. Epub 2022 Jun 24.

Hacettepe University Faculty of Medicine, Department of Cardiology, Arrhythmia and Electrophysiology Unit, Ankara, Turkey.

In this issue of the journal, Sciacca et al. (Ref) reported their single center experience in a small non-randomized observational study about the catheter ablation approach and outcomes in 74 patients with atrial arrhythmia reccurence [atrial fibrillation (AF) (36.5%) and atrial tachycardia (AT) (63. Read More

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Impact of left atrial low-voltage areas during initial ablation procedures on very late recurrence of atrial fibrillation.

J Cardiovasc Electrophysiol 2022 Jun 24. Epub 2022 Jun 24.

Kansai Rosai Hospital Cardiovascular Center, Amagasaki, Hyogo, Japan.

Background: Very late recurrence of atrial fibrillation (VLRAF) occurring >1 year after catheter ablation may influence long-term follow-up strategies, including oral anticoagulant therapy. However, little is known about the predictors of this condition. Given that the prevalence of left atrial low-voltage areas (LVAs) is strongly associated with the recurrence of atrial tachyarrhythmias following catheter ablation, we hypothesized that VLRAF might occur more frequently in patients with LVAs at the time of initial ablation. Read More

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Modified Thermal Balloon Endometrial Ablation for Treatment of Heavy Menstrual Bleeding.

Gynecol Minim Invasive Ther 2022 Apr-Jun;11(2):100-104. Epub 2022 May 4.

Department of Obstetrics and Gynecology, College of Medicine, Mosul University, Mosul, Iraq.

Objectives: The objective of this study was to determine the efficacy of modified thermal balloon ablation using Foley's catheter in the treatment of heavy menstrual bleeding (HMB).

Materials And Methods: Twelve patients with HMB aged 35-55 years underwent modified thermal balloon ablation using Foley's catheter. Patients were selected after complete clinical evaluation and investigations. Read More

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Stereotactic Radiotherapy: An Alternative Option for Refractory Ventricular Tachycardia to Drug and Ablation Therapy.

J Clin Med 2022 Jun 20;11(12). Epub 2022 Jun 20.

Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin 300211, China.

Refractory ventricular tachycardia (VT) often occurs in the context of organic heart disease. It is associated with significantly high mortality and morbidity rates. Antiarrhythmic drugs and catheter ablation represent the two main treatment options for refractory VT, but their use can be associated with inadequate therapeutic responses and procedure-related complications. Read More

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Review of Contemporary Invasive Treatment Approaches and Critical Appraisal of Guidelines on Hypertrophic Obstructive Cardiomyopathy: State-of-the-Art Review.

J Clin Med 2022 Jun 14;11(12). Epub 2022 Jun 14.

Department for the Treatment and Study of Cardiothoracic Diseases and Cardiothoracic Transplantation, IRCCS-ISMETT, 90127 Palermo, Italy.

Background: Hypertrophic obstructive cardiomyopathy (HOCM) is a heterogeneous disease with different clinical presentations, albeit producing similar dismal long-term outcomes if left untreated. Several approaches are available for the treatment of HOCM; e.g. Read More

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A Watch-Type Electrocardiography Is a Reliable Tool for Detecting Paroxysmal Cardiac Arrhythmias.

J Clin Med 2022 Jun 10;11(12). Epub 2022 Jun 10.

Department of Internal Medicine, Division of Cardiology, Korea University Anam Hospital, Korea University College of Medicine, Seoul 02841, Korea.

: A substantial proportion of cardiac arrhythmias are paroxysmal in nature, and 12-lead electrocardiography (ECG) and Holter monitoring often fail to detect paroxysmal arrhythmias. We designed and evaluated a watch-type, electrocardiograph-recording, wearable device (w-ECG) to overcome the limitations of 12-lead ECG and Holter monitoring. : We prospectively enrolled 96 patients with symptoms assumed to be related to cardiac arrhythmias. Read More

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Procedural Feasibility and Long-Term Efficacy of Catheter Ablation of Atypical Atrial Flutters in a Wide Spectrum of Heart Diseases: An Updated Clinical Overview.

J Clin Med 2022 Jun 9;11(12). Epub 2022 Jun 9.

Department of Medicine and Surgery, University of Insubria, 21100 Varese, Italy.

Atypical atrial flutters (AAFL) are difficult-to-manage atrial arrhythmias, yet potentially amenable to effective radiofrequency catheter ablation (CA). However, data on CA feasibility are only sparingly reported in the literature in different clinical settings, such as AAFL related to surgical correction of congenital heart disease. The aim of this review was to provide an overview of the clinical settings in which AAFL may occur to help the cardiac electrophysiologist in the prediction of the tachycardia circuit location before CA. Read More

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Randomized trial of conventional versus radiofrequency needle transseptal puncture for cryoballoon ablation: the CRYO-LATS trial.

J Interv Card Electrophysiol 2022 Jun 24. Epub 2022 Jun 24.

University of British Columbia, Vancouver, Canada.

Background: Transseptal puncture to achieve left atrial access is necessary for many cardiac procedures, including atrial fibrillation ablation. More recently, there has been an increasing need for left atrial access using large caliber sheaths, which increases risk of perforation associated with the initial advancement into the left atrium. We compared the effectiveness of a radiofrequency needle-based transseptal system versus conventional needle for transseptal access. Read More

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Uninterrupted Oral Anticoagulation During Catheter Ablation of Ventricular Tachycardia: Is the Riskier Option the Safest?

JACC Clin Electrophysiol 2022 Jun;8(6):749-753

Thrombosis Research Group and Section of Vascular Medicine, Division of Cardiovascular Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA.

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Coagulation Response and Prothrombotic Effect of Uninterrupted Oral Anticoagulant Administration After Catheter Ablation for VT.

JACC Clin Electrophysiol 2022 Jun 27;8(6):735-748. Epub 2022 Apr 27.

Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan.

Background: Catheter ablation for ventricular tachycardia (VT) is associated with perioperative thromboembolic risk. However, the strategy for postprocedural management remains unknown.

Objectives: The aim of this study was to evaluate the prothrombotic response after VT ablation in various coagulation biomarkers in patients with and without the administration of oral anticoagulation (OAC). Read More

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Pulsed Field Ablation of Left Ventricular Myocardium in a Swine Infarct Model.

JACC Clin Electrophysiol 2022 Jun 28;8(6):722-731. Epub 2022 Apr 28.

Section of Cardiac Electrophysiology, Division of Cardiology, Department of Medicine, University of California-San Francisco, San Francisco, California, USA. Electronic address:

Background: Pulsed field ablation (PFA) leads to cell death by irreversible electroporation. There are limited data about PFA lesion characteristics in the ventricle, particularly in the presence of myocardial scar.

Objectives: This study sought to evaluate the lesion characteristics of PFA and radiofrequency energy (RFA) in healthy and infarcted left ventricular (LV) myocardium in swine. Read More

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Repolarization Heterogeneity in Human Post-Infarct Ventricular Tachycardia.

JACC Clin Electrophysiol 2022 Jun;8(6):713-718

University of Massachusetts, Worchester, Massachusetts, USA.

Background: Slow conduction, caused by fibrosis between surviving myocytes and connexin remodeling, is an important prerequisite for post-infarction ventricular tachycardia (VT); however, slow conduction is present throughout the infarct whereas VT circuits are finite in number and discrete. In a porcine model of VT, re-entrant circuits occur at region of significant repolarization heterogeneity caused by up-regulation of potassium channel β-subunits KCNE3 (increasing repolarization current) and KCNE4 (decreasing repolarization current), causing heterogeneous action potential durations.

Objectives: This study was designed to determine whether re-entrant circuits in human post-infarction VT are associated with repolarization heterogeneity. Read More

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PolarX Cryoballoon metrics predicting successful pulmonary vein isolation: targets for ablation of atrial fibrillation.

Europace 2022 Jun 23. Epub 2022 Jun 23.

The Barts Heart Centre, St Bartholomew's Hospital, Barts Health NHS Trust, W. Smithfield, EC1A 7BE London, UK.

Aim: Evaluate the novel PolarX Cryoballoon in atrial fibrillation (AF) catheter ablation through a propensity-matched comparison with the Arctic Front Advance (AFA). The aim was also to identify cryoablation metrics that are predictive of successful pulmonary vein isolation (PVI) with the PolarX Cryoballoon.

Methods And Results: This prospective multi-centre study included patients that underwent cryoablation for AF. Read More

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Effect of pulmonary vein isolation on the relationship between left atrial reverse remodeling and sympathetic nerve activity in patients with atrial fibrillation.

Clin Auton Res 2022 Jun 23. Epub 2022 Jun 23.

Department of Cardiovascular Medicine, Kanazawa University Graduate School of Medical Sciences Kanazawa, Kanazawa, Japan.

Purpose: Catheter ablation (CA) to isolate the pulmonary vein, which is an established treatment for atrial fibrillation (AF), is associated with left atrium reverse remodeling (LARR). The intrinsic cardiac autonomic nervous system includes the ganglion plexi adjacent to the pulmonary vein in the left atrium (LA). However, little is known about the effect of CA on the relationship between LARR and sympathetic nerve activity in patients with AF. Read More

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The Relevance of Heart Rate Fluctuation When Evaluating Atrial Substrate Electrical Features in Catheter Ablation of Paroxysmal Atrial Fibrillation.

J Cardiovasc Dev Dis 2022 Jun 1;9(6). Epub 2022 Jun 1.

BioMIT.org, Electronic Engineering Department, Universitat Politecnica de Valencia, 46022 Valencia, Spain.

Coronary sinus (CS) catheterization is critical during catheter ablation (CA) of atrial fibrillation (AF). However, the association of CS electrical activity with atrial substrate modification has been barely investigated and mostly limited to analyses during AF. In sinus rhythm (SR), atrial substrate modification is principally assessed at a global level through P-wave analysis. Read More

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Percutaneous Ablation of Hepatic Tumors at the Hepatocaval Confluence Using Irreversible Electroporation: A Preliminary Study.

Curr Oncol 2022 May 31;29(6):3950-3961. Epub 2022 May 31.

Department of Interventional Radiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China.

Background: Tumors at the hepatocaval confluence are difficult to treat, either surgically or ablatively.

Methods: A retrospective longitudinal study on patients ineligible for thermal ablation who underwent computed tomography-guided IRE for hepatic tumors at the hepatocaval confluence was conducted. Factors analyzed included patient and tumor characteristics, IRE procedure details, treatment-related complications, and prognosis. Read More

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An infant phantom for pediatric pericardial access and electrophysiology training.

Heart Rhythm O2 2022 Jun 22;3(3):295-301. Epub 2022 Feb 22.

Sheikh Zayed Institute for Pediatric Surgical Innovation, Children's National Hospital, Washington, DC.

Background: Cardiac procedures in infants and children require a high level of skill and dexterity owing to small stature and anatomy. Lower incidence of procedure volume in this population results in fewer clinical opportunities for learning. Simulators have grown in popularity for education and training, though most existing simulators are often cost-prohibitive or model adult anatomy. Read More

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Safety and efficacy outcomes of atrial fibrillation ablation in patients with rheumatoid arthritis.

Heart Rhythm O2 2022 Jun 15;3(3):261-268. Epub 2022 Mar 15.

Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota.

Background: Rheumatoid arthritis (RA) is an immune-mediated inflammatory disease associated with atrial fibrillation (AF) and stroke.

Objective: The purpose of this study was to evaluate the safety and efficacy of AF ablation in patients with RA.

Methods: All patients with RA undergoing AF ablation at our institution from 2010 to 2021 were propensity matched to patients without RA using 9 baseline characteristics. Read More

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Long-term outcome of patients with long-standing persistent atrial fibrillation undergoing ablation guided by a novel high-density panoramic mapping system: A propensity score matching study.

Heart Rhythm O2 2022 Jun 19;3(3):269-278. Epub 2022 Apr 19.

Heart Rhythm Center, Division of Cardiology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan.

Background: Catheter ablation is a current therapeutic approach for atrial fibrillation (AF). However, its efficacy for long-standing persistent AF remains suboptimal.

Objective: The purpose of this study was to test the hypothesis that a panoramic mapping system (CARTOFINDER, Biosense Webster) can guide pulmonary vein (PV) isolation and additional potential AF drivers. Read More

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Relationship between the posterior atrial wall and the esophagus: Esophageal position during atrial fibrillation ablation.

Heart Rhythm O2 2022 Jun 13;3(3):252-260. Epub 2022 Feb 13.

Heart Institute, Teknon Medical Center, Barcelona, Spain.

Background: Atrial fibrillation ablation implies a risk of esophageal thermal injury. Esophageal position can be analyzed with imaging techniques, but evidence for esophageal mobility is inconsistent.

Objectives: The purpose of this study was to analyze esophageal position stability from one procedure to another and during a single procedure. Read More

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Deep sedation with propofol in patients undergoing left atrial ablation procedures-Is it safe?

Heart Rhythm O2 2022 Jun 22;3(3):288-294. Epub 2022 Feb 22.

Department of Electrophysiology, German Heart Center Munich, Technische Universitaet Munich, Munich, Germany.

Background: Catheter ablation for atrial fibrillation (AF) or left atrial tachycardia is well established. To avoid body movement and pain, sedative and analgesic agents are used.

Objective: The aim was to investigate safety of sedation/anti-pain protocol administered by electrophysiology (EP) staff. Read More

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Left Atrial Appendage Mechanical Dispersion Assessed by Speckle-Tracking Echocardiography as a Determinant of Left Atrial Appendage Blood Stasis in Patients With Atrial Fibrillation.

Front Cardiovasc Med 2022 6;9:905293. Epub 2022 Jun 6.

Department of Cardiology, Key Laboratory of Cardiovascular Intervention and Regenerative Medicine of Zhejiang Province, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, China.

Aims: We sought to investigate the relationship of left atrial appendage (LAA) mechanical dispersion (MD) with LAA dense spontaneous echo contrast (SEC) or thrombus, and to compare its usefulness in the identification of thrombogenesis with left atrial (LA) MD or LA/LAA strain parameters in patients with atrial fibrillation (AF).

Methods: We conducted a cross-sectional study of 493 consecutive patients with AF [65(58.5-71. Read More

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Contemporary Management of Complex Ventricular Arrhythmias.

Arrhythm Electrophysiol Rev 2022 Apr;11:e04

Advanced Ventricular Arrhythmia Training and Research (AVATAR) Program, St George's University Hospitals NHS Foundation Trust, London, UK.

Percutaneous catheter ablation is an effective and safe therapy that can eliminate ventricular tachycardia, reducing the risks of both recurrent arrhythmia and shock therapies from a defibrillator. Successful ablation requires accurate identification of arrhythmic substrate and the effective delivery of energy to the targeted tissue. A thorough pre-procedural assessment is needed before considered 3D electroanatomical mapping can be performed. Read More

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Preprocedural Discrimination of Posteroseptal Accessory Pathways Ablated from the Right Endocardium from Those Requiring a Left-sided or Epicardial Coronary Venous Approach.

Arrhythm Electrophysiol Rev 2022 Apr;11:e07

Arrhythmia Unit, Cardiovascular Department, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland.

The success of radiofrequency catheter ablation of the accessory pathway (AP) depends on the accurate localisation of the bypass tract. In that respect, posteroseptal or inferior paraseptal APs often pose a diagnostic challenge because of the complex anatomy at the crux of the four cardiac chambers. Considering the differences in procedure risks and success rate depending on the need for a left-sided approach or a coronary sinus ablation, an accurate anticipation of the precise location of inferior paraseptal APs is critical to inform the consent process and guide the initial mapping strategy. Read More

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Development and Validation of a Novel Prognostic Model Predicting the Atrial Fibrillation Recurrence Risk for Persistent Atrial Fibrillation Patients Treated with Nifekalant During the First Radiofrequency Catheter Ablation.

Cardiovasc Drugs Ther 2022 Jun 22. Epub 2022 Jun 22.

Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, People's Republic of China.

Background: This study aimed to establish and assess a prediction model for patients with persistent atrial fibrillation (AF) treated with nifekalant during the first radiofrequency catheter ablation (RFCA).

Methods: In this study, 244 patients with persistent AF from January 17, 2017 to December 14, 2017, formed the derivation cohort, and 205 patients with persistent AF from December 15, 2017 to October 28, 2018, constituted the validation cohort. The least absolute shrinkage and selection operator regression was used for variable screening and the multivariable Cox survival model for nomogram development. Read More

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Successful radiofrequency catheter ablation of idiopathic premature ventricular complexes originating from the outflow tract improves heart failure-related quality of life.

J Interv Card Electrophysiol 2022 Jun 22. Epub 2022 Jun 22.

Department of Cardiology, Yeditepe University Hospital, Hastahane Sok. No: 4, 34752, Istanbul, Turkey.

Background: To investigate the effect of successful RFCA in patients with idiopathic outflow tract PVCs (OT-PVC) on left heart functions, neurohormonal activation, functional status, and heart failure-related quality of life (HFQoL), with an integrated approach.

Methods: Patients with frequent OT-PVCs, determined by 12-lead surface ECG who underwent radiofrequency catheter ablation (RFCA) with an acute success, were prospectivelly enrolled. Left heart functions were evaluated with the use of transthoracic echocardiography, neurohormonal activation with N-terminal Pro-brain natriuretic peptide (BNP), functional class with New York Heart Association (NYHA) and 6-min walking distance (6MWD), and HFQoL with Minnesota Living with Heart Failure Questionnaire (MLHFQ), at baseline and at 6 months. Read More

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Can Early Ablation of Ventricular Tachycardia Improve Survival?

Circulation 2022 Jun 21;145(25):1850-1852. Epub 2022 Jun 21.

Cardiovascular Division, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN.

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Early Results With a New Endovenous Radiofrequency Ablation Catheter, Venclose®.

Vasc Endovascular Surg 2022 Jun 21:15385744221110440. Epub 2022 Jun 21.

Total Vascular Care, Brooklyn, NY, USA.

Objectives: Endovenous Radio-frequency Ablation (RFA) has become a common treatment for chronic venous insufficiency. The Medtronic Closurefast catheter was previously the only RFA catheter approved for use in this procedure. In 2018 VenClose Company's new device was approved. Read More

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Effect of MRI-Guided Fibrosis Ablation vs Conventional Catheter Ablation on Atrial Arrhythmia Recurrence in Patients With Persistent Atrial Fibrillation: The DECAAF II Randomized Clinical Trial.

JAMA 2022 06;327(23):2296-2305

Cardiology Department, University of Washington Medical Center, Seattle.

Importance: Ablation of persistent atrial fibrillation (AF) remains a challenge. Left atrial fibrosis plays an important role in the pathophysiology of AF and has been associated with poor procedural outcomes.

Objective: To investigate the efficacy and adverse events of targeting atrial fibrosis detected on magnetic resonance imaging (MRI) in reducing atrial arrhythmia recurrence in persistent AF. Read More

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