Journal ArticleJ Cardiovasc Electrophysiol · May 2024
INTRODUCTION: Peak frequency (PF) mapping is a novel method that may identify critical portions of myocardial substrate supporting reentry. The aim of this study was to describe and evaluate PF mapping combined with omnipolar voltage mapping in the identif ...
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Journal ArticleJ Cardiovasc Electrophysiol · November 2023
BACKGROUND: Traditional transvenous pacemakers are associated with worsening tricuspid valve function due to lead-related leaflet impingement, as well as ventricular dysfunction related to electromechanical dyssynchrony from chronic right ventricular (RV) ...
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Journal ArticleAm J Cardiovasc Drugs · November 2023
BACKGROUND: There is evidence to suggest that colchicine reduces the risk of recurrent atrial fibrillation (AF) after catheter ablation; however, the tolerability and safety of colchicine in routine practice is unknown. METHODS: Patients undergoing cathete ...
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Journal ArticleHeart Rhythm · October 2023
BACKGROUND: Left ventricular (LV) lead implantation is often the most challenging aspect of cardiac resynchronization therapy (CRT) procedures; early studies reported implant failure rates in ∼10% of cases. OBJECTIVE: The purpose of this study was to defin ...
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Journal ArticleJ Cardiovasc Electrophysiol · July 2023
INTRODUCTION: Accurate localization of septal outflow tract premature ventricular contractions (PVCs) is often difficult due to frequent mid-myocardial or protected origin. Compared with traditional activation mapping, CARTO Ripple mapping provides visuali ...
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Journal ArticleHeart Rhythm · April 2023
BACKGROUND: Patients with ischemic cardiomyopathy, non-left bundle branch block, or QRS duration <150 ms have a lower response rate to cardiac resynchronization therapy (CRT) than did other indicated patients. The ECG Belt system (EBS) is a novel surface m ...
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Journal ArticleJ Electrocardiol · 2023
BACKGROUND: Chronic right ventricular (RV) pacing can induce left ventricular (LV) dyssynchrony and cause pacemaker induced cardiomyopathy (PiCM). Identifying which patients are at risk for PiCM is limited. METHODS: Patients receiving RV-only permanent pac ...
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Journal ArticleJACC Clin Electrophysiol · December 2022
BACKGROUND: Peak-to-peak bipolar voltage varies with electrode orientation, fractionation, and collision events. Novel, omnipolar mapping is less dependent on electrode orientation but has limited data in humans. OBJECTIVES: This study sought to compare bi ...
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Journal ArticleAnn Intern Med · September 2022
BACKGROUND: Left atrial appendage occlusion (LAAO) is a potential alternative to oral anticoagulants in selected patients with atrial fibrillation (AF). Compared with anticoagulants, LAAO decreases major bleeding risk, but there is uncertainty regarding th ...
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Journal ArticleJ Cardiovasc Electrophysiol · March 2022
BACKGROUND: Cardiac implanted electronic device (CIED) pocket and systemic infection remain common complications with traditional CIEDs and are associated with high morbidity and mortality. Leadless pacemakers may be an attractive pacing alternative for ma ...
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Journal ArticleCirc Heart Fail · October 2021
BACKGROUND: Patients with severe mental illness (SMI) including schizophrenia, bipolar disorder, and severe depression have earlier onset of cardiovascular risk factors, predisposing to worse future heart failure (HF) compared with the general population. ...
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Journal ArticleHeart Rhythm O2 · October 2021
BACKGROUND: Atrioventricular (AV)-synchronous single-chamber leadless pacing using a mechanical atrial sensing algorithm produced high AV synchrony in clinical trials, but clinical practice experience with these devices has not yet been described. OBJECTIV ...
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Journal ArticleProg Cardiovasc Dis · 2021
Stroke is a major driver of increased morbidity and mortality in patients with non-valvular atrial fibrillation (NVAF). While systemic oral anticoagulation (OAC) continues to be the mainstay for stroke reduction therapy in patients with NVAF, several barri ...
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Journal ArticlePacing Clin Electrophysiol · December 2020
BACKGROUND: Leadless pacemakers (LPs) provide ventricular pacing without the risks associated with transvenous leads and device pockets. LPs are appealing for patients who need pacing, but do not need defibrillator or cardiac resynchronization therapy. Mos ...
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Journal ArticlePacing Clin Electrophysiol · October 2020
The ECG Belt for CRT response trial is designed to test the hypothesis that in patients traditionally less likely to respond to cardiac resynchronization therapy (CRT), an individualized approach utilizing the electrocardiogram (ECG) Belt to guide lead pla ...
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Journal ArticleIJC Heart and Vasculature · October 1, 2020
Background: Active cigarette smoking (CS) is a contraindication for Orthotopic Heart Transplantation (OHT) with a recommendation that HT candidates be free from CS for at minimum 6 months prior to HT. Animal studies have shown that a history of CS is assoc ...
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Journal ArticlePacing Clin Electrophysiol · September 2020
BACKGROUND: Cardiac amyloidosis is a progressive infiltrative disease involving deposition of amyloid fibrils in the myocardium and cardiac conduction system that frequently manifests with heart failure (HF) and arrhythmias, most frequently atrial fibrilla ...
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Journal ArticleJACC Clin Electrophysiol · September 2020
OBJECTIVES: This study sought to determine the indications, characteristics, and outcomes of cardiovascular implantable electronic device (CIED) surgery in patients with LVAD. BACKGROUND: Many patients with a left ventricular assist device (LVAD) will requ ...
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Journal ArticleHeart Rhythm O2 · August 2020
BACKGROUND: Diabetes mellitus (DM) is an independent risk factor for atrial fibrillation (AF). Few studies have compared clinical outcomes after catheter ablation between patients with and those without DM. OBJECTIVE: The purpose of this study was to compa ...
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Journal ArticleJ Cardiovasc Electrophysiol · June 2020
INTRODUCTION: Lead dysfunction can lead to serious consequences including failure to treat ventricular tachycardia or fibrillation (VT/VF). The incidence and mechanisms of lead dysfunction following left ventricular assist device (LVAD) implantation are no ...
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Chapter · May 15, 2020
The implantable cardioverter-defibrillator (ICD) is an effective therapy for reducing the risk of sudden death in survivors of cardiac arrest and in patients with significant left ventricular systolic dysfunction and heart failure. A brief examination shou ...
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Journal ArticleJ Cardiovasc Electrophysiol · May 2020
INTRODUCTION: The Medtronic Attain Stability Quad lead is a quadripolar left ventricular (LV) lead with an active fixation helix assembly designed to fixate the lead within the coronary sinus and pace nonapical regions of the LV. The primary objective of t ...
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Journal ArticleJ Arrhythm · April 2020
BACKGROUND: Focal impulse and rotor modulation (FIRM) can cause slowing, organization, and occasionally termination of atrial fibrillation (AF), although results have been mixed. To further characterize changes in AF during rotor ablation, we quantified mo ...
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Journal ArticleAm Heart J · February 2020
BACKGROUND: Pulmonary wall isolation (PWI) is increasingly used as an adjunctive lesion set to compliment pulmonary vein isolation (PVI), especially in patients with persistent atrial fibrillation (AF). The objective was to compare outcomes of catheter abl ...
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Journal ArticleJ Arrhythm · February 2020
BACKGROUND: Catheter ablation is an important rhythm control therapy in patients with atrial fibrillation (AF) with concomitant heart failure (HF). The objective of this study was to assess the comparative efficacy of AF ablation patients with ischemic vs ...
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Journal ArticlePacing Clin Electrophysiol · November 2019
BACKGROUND: Compared with medical therapy, catheter ablation of atrial fibrillation (AF) in patients with heart failure (HF) improves cardiovascular outcomes. Risk scores (CAAP-AF and APPLE) have been developed to predict the likelihood of AF recurrence af ...
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Journal ArticleEuropace · November 1, 2019
AIMS: Patient selection is a key component of securing optimal patient outcomes with leadless pacing. We sought to describe and compare patient characteristics and outcomes of Micra patients with and without a primary pacing indication associated with atri ...
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Chapter · April 5, 2019
Mapping and elimination (ablation) of an abnormal cardiac rhythm requires an understanding of normal and abnormal anatomy and physiology, and monitoring of the interventional catheters and ablation energy’s effects. Cardiac electrophysiology has evolved en ...
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Journal ArticleCard Electrophysiol Clin · March 2019
Implantation of cardiac resynchronization therapy devices represents one of the more challenging and time-consuming procedures for the clinical electrophysiologist. This article reviews several strategies used to improve efficiency, safety, and effectivene ...
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Journal ArticleCard Electrophysiol Clin · December 2018
With expanding indications for cardiac resynchronization therapy and increased survival of patients with cardiovascular disease, the need for lead addition or revision in the presence of an existing implantable electronic device is likely to increase. Part ...
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Journal ArticleEuropace · November 1, 2018
AIMS: To assess whether obstructive sleep apnea (OSA) was associated with increased rotor burden among atrial fibrillation (AF) patients. METHODS AND RESULTS: We studied 33 consecutive patients who were scheduled for focal impulse and rotor modulation (FIR ...
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Journal ArticleHeart Rhythm · May 2018
BACKGROUND: Few studies have examined outcomes of catheter ablation for atrial fibrillation (AF) in patients with heart failure (HF) with preserved ejection fraction (HFpEF). OBJECTIVE: The purpose of this study was to compare outcomes of AF ablation in pa ...
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Journal ArticleHeart Rhythm · April 2018
BACKGROUND: Compared with men, women have longer corrected QT (QTc) intervals, lower clearance of dofetilide, and higher rates of drug-induced torsades de pointes, but the dofetilide dosing algorithm is the same for men and women. OBJECTIVE: The purpose of ...
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Journal ArticleJACC Clin Electrophysiol · January 2018
OBJECTIVES: In this study, the authors sought to perform a meta-analysis of controlled studies assessing the relationship between left atrial appendage (LAA) electrical isolation (EI) and recurrent atrial fibrillation (AF). BACKGROUND: LAA triggers could p ...
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Journal ArticleHeart Rhythm · September 2017
BACKGROUND: Atrioesophageal fistula formation is a rare but life-threatening complication of atrial fibrillation ablation. Contact force (CF)-sensing catheters improve procedural effectiveness. However, the impact of the implementation of CF-sensing techno ...
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Journal ArticleHeart Rhythm · May 2017
BACKGROUND: Device repositioning during Micra leadless pacemaker implantation may be required to achieve optimal pacing thresholds. OBJECTIVE: The purpose of this study was to describe the natural history of acute elevated Micra vs traditional transvenous ...
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Journal ArticleHeart Lung · 2017
BACKGROUND: It is unclear what symptom challenges occur during the recovery phase after atrial fibrillation (AF) ablation. OBJECTIVES: This longitudinal pilot study explored the patient perspective of the first six months following an AF ablation. METHODS: ...
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Journal ArticleHeart Rhythm · August 2016
Catheter ablation of ventricular tachycardia (VT) has evolved in recent years, especially in patients with ischemic heart disease. Data from prospective studies show that VT catheter ablation reduces the risk of recurrent VT; however, there is a paucity of ...
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Journal ArticleJ Interv Card Electrophysiol · March 2016
BACKGROUND: Patients with ischemic heart disease may have implantable cardioverter defibrillators (ICDs) implanted for primary or secondary prevention of sudden cardiac death. Although ICD shocks can be life saving, in some patients, they have been associa ...
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Journal ArticleJ Interv Card Electrophysiol · December 2015
PURPOSE: Cardiac resynchronization therapy (CRT) improves outcomes in patients with heart failure, yet response rates are variable. We sought to determine whether physician-specified CRT programming was associated with improved outcomes. METHODS: Using dat ...
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Journal ArticleJ Cardiovasc Electrophysiol · February 2015
INTRODUCTION: We conducted this pilot randomized clinical trial to determine the feasibility of a large clinical trial aimed at testing whether early use of catheter ablation of ventricular tachycardia (VT) is superior to antiarrhythmic medications at redu ...
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Journal ArticleJ Card Fail · January 2015
BACKGROUND: We sought to determine if outcomes with exercise training in heart failure (HF) vary according to ventricular pacing type. METHODS AND RESULTS: Heart Failure: A Controlled Trial Investigating Outcomes of Exercise Training (HF-ACTION) randomized ...
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Journal ArticleJ Electrocardiol · 2015
INTRODUCTION: Electrocardiographic (ECG) LV scar quantification may improve prediction of CRT response. METHODS AND RESULTS: Data were abstracted in 76 patients who underwent a first CRT implantation at 2 US centers. Selvester QRS scar quantification was p ...
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Journal ArticleJ Electrocardiol · 2015
INTRODUCTION: Left bundle branch block (LBBB) is a known complication of transcatheter aortic valve replacement (TAVR) and has been shown to predict worsened outcomes in TAVR patients. A regional longitudinal strain pattern, termed the "classic" pattern of ...
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Journal ArticlePacing Clin Electrophysiol · May 2013
BACKGROUND: Proper positioning of the left ventricular (LV) lead improves clinical outcomes and survival in patients receiving cardiac resynchronization therapy (CRT). Techniques of LV lead insertion using contrast injection and a telescoping system of del ...
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Journal ArticleCurr Cardiol Rep · February 2013
The impact of cardiac resynchronization therapy (CRT) on atrial fibrillation (AF) burden is poorly characterized. To assess the influence of CRT on AF, we performed a systematic literature search in MEDLINE using the MeSH headings "cardiac resynchronizatio ...
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Journal ArticleEur Heart J · January 2013
AIMS: Pre-implant assessment of longitudinal mechanical dyssynchrony using cross-correlation analysis (XCA) was tested for association with long-term survival and compared with other tissue Doppler imaging (TDI)-derived indices. METHODS AND RESULTS: In 131 ...
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Journal ArticlePacing Clin Electrophysiol · January 2012
A 41-year-old man underwent implantation of a right-sided implantable cardioverter defibrillator after removal of an infected left-sided system. Defibrillation threshold (DFT) testing on the right-sided system failed to convert ventricular fibrillation at ...
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Journal ArticleJ Cardiovasc Electrophysiol · October 2011
Use of VSTAP to Facilitate Hemodynamic Support. The ablation of hemodynamically unstable ventricular tachycardia (VT) is challenging and frequently requires alternative mapping techniques or the use of percutaneous mechanical support devices. Loss of atrio ...
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Journal ArticleCirc Arrhythm Electrophysiol · December 2009
BACKGROUND: Catheter ablation is an established yet evolving nonpharmacologic intervention for the maintenance of sinus rhythm in patients with atrial fibrillation (AF). The efficacy and safety of pulmonary vein isolation (PVI) compared with medical therap ...
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Journal ArticleJ Electrocardiol · 2009
The electrocardiographic diagnosis of left ventricular hypertrophy (LVH) has been centered on improving the diagnostic sensitivity and specificity of the method, using criteria whose precise relationship to increased left ventricular mass are not establish ...
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Journal ArticleAm Heart J · May 2008
In July 2005, leaders from academia, government, and industry convened in Washington, DC, to discuss key issues in the development of antithrombotic treatments for atrial fibrillation (AF). In addition to summarizing available data on the relative benefits ...
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