Abstract:
BACKGROUND:Frequent premature ventricular complexes (PVCs) can cause a decline in left ventricular ejection fraction (LVEF). We investigated whether the site of origin and other PVC characteristics are associated with LVEF. METHODS:We retrospectively studied 70 consecutive patients (mean age 42 ± 17 years, 40 [57%] female) with no other cause of cardiomyopathy undergoing ablation of PVCs. We analyzed the association of a reduced LVEF, defined by LVEF <50% on echocardiography, with features of PVCs obtained from electrocardiography, 24- or 48-hour Holter monitor and electrophysiology study. RESULTS:Patients with reduced LVEF (n = 17) as compared to normal LVEF (n = 53) had an increased burden of PVCs (29.3 ± 14.6% vs 16.7 ± 13.7%, P = 0.004), higher prevalence of nonsustained ventricular tachycardia (VT) [13 (76%) vs 21 (40%), P = 0.01], longer PVC duration (154.3 ± 22.9 vs 145.6 ± 20.8 ms, P = 0.03) and higher prevalence of multiform PVCs [15 (88%) vs 31 (58%), P = 0.04]. There was no significant difference in prevalence of sustained VT, QRS duration of normally conducted complexes, PVC coupling interval, or delay in PVC intrinsicoid deflection. Patients with fascicular PVCs (n = 5) had higher mean LVEF compared to others (66.2 ± 4.0% vs 53.0 ± 10.0%, P = 0.002). There was no association of LVEF with other PVC foci or with left-bundle versus right-bundle branch block morphologies. The threshold burden of PVCs associated with reduced LVEF was lower for right as compared to left ventricular PVCs. CONCLUSION:In addition to the PVC burden, other characteristics like a longer PVC duration, presence of nonsustained VT, multiform PVCs and right ventricular PVCs might be associated with cardiomyopathy.
journal_name
J Cardiovasc Electrophysioljournal_title
Journal of cardiovascular electrophysiologyauthors
Del Carpio Munoz F,Syed FF,Noheria A,Cha YM,Friedman PA,Hammill SC,Munger TM,Venkatachalam KL,Shen WK,Packer DL,Asirvatham SJdoi
10.1111/j.1540-8167.2011.02021.xsubject
Has Abstractpub_date
2011-07-01 00:00:00pages
791-8issue
7eissn
1045-3873issn
1540-8167journal_volume
22pub_type
杂志文章abstract:BACKGROUND:Low conduction velocity (CV) in the area showing low electrogram amplitude (EA) is characteristic of reentry circuit of atypical atrial flutter (AFL). The quantitative relationship between CV and EA remains unclear. We characterized AFL reentry circuit in the right atrium (RA), focusing on the relationship b...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/jce.12329
更新日期:2014-04-01 00:00:00
abstract::After being struck by a car at the age of 7, an otherwise healthy boy developed recalcitrant, albeit hemodynamically, well-tolerated ventricular tachycardia. An electrophysiological study with 3-dimensional electroanatomic mapping was performed under transesophageal echocardiographic guidance at 10 years of age. Nonau...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/j.1540-8167.2010.01928.x
更新日期:2011-06-01 00:00:00
abstract:INTRODUCTION:Risk factors of embolic stroke (ES) after atrial fibrillation (AF) ablation have not been fully elucidated especially among the Asian subjects, particularly regarding epicardial adipose tissue (EAT) in cardiac imaging. We aimed to assess the incidence of ES during a long-term follow-up period after AF abla...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章,多中心研究
doi:10.1111/jce.14154
更新日期:2019-11-01 00:00:00
abstract:INTRODUCTION:The right inferior pulmonary vein (RIPV) accounts as the most frequently reconnected vein after pulmonary vein isolation using second-generation cryoballoon ablation (CB-A). Our objective was to assess anatomic predictors of late RIPV reconnection based on preprocedural computed tomography scan. METHODS:P...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/jce.14186
更新日期:2019-11-01 00:00:00
abstract:INTRODUCTION:While atrial fibrillation (AF) initiation in the pulmonary veins has been well-studied, simultaneous biatrial and three-dimensional noncontact mapping (NCM) has not been performed. We hypothesized that these two techniques would provide novel information on triggers, initiation, and evolution of spontaneou...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/j.1540-8167.2005.40531.x
更新日期:2005-05-01 00:00:00
abstract:INTRODUCTION:To determine if collagenase-dispersed epicardial myocytes overlying myocardial infarction reproduce the same altered electrophysiology observed in intact epicardium, multicellular tissue preparations and enzymatically-dispersed myocytes from ischemically-injured canine subepicardium were examined 1 and 4 d...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/j.1540-8167.1993.tb01208.x
更新日期:1993-02-01 00:00:00
abstract:INTRODUCTION:The nature of the atrial substrate thought to contribute toward maintaining atrial fibrillation (AF) outside the pulmonary veins remains poorly defined. Therefore, our objective was to determine whether patients with paroxysmal and persistent AF have an abnormal electroanatomic substrate within the left at...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/j.1540-8167.2011.02178.x
更新日期:2012-03-01 00:00:00
abstract:INTRODUCTION:Catheter ablation of atrial fibrillation (AF) currently relies on eliminating triggers, and no reliable method exists to map the arrhythmia itself to identify ablation targets. The aim of this multicenter study was to define the use of Focal Impulse and Rotor Modulation (FIRM) for identifying ablation targ...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 临床试验,杂志文章,多中心研究
doi:10.1111/jce.12000
更新日期:2012-12-01 00:00:00
abstract:INTRODUCTION:accurate selection of patients for vasovagal syncope studies requires strong risk stratification and knowledge of the natural history of syncope. We aimed to test the hypothesis that recent history of vasovagal syncope compared to distant history better predicts subsequent recurrence of syncope. METHODS A...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章,随机对照试验
doi:10.1111/j.1540-8167.2010.01848.x
更新日期:2010-12-01 00:00:00
abstract:INTRODUCTION:The stability of implantable cardiac defibrillation lead impedance subsequent to implantation has not been reported and may have important clinical implications. The objective was to characterize the incidence and degree of impedance changes occurring after implantation of defibrillation lead systems. MET...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/j.1540-8167.1996.tb00577.x
更新日期:1996-08-01 00:00:00
abstract:INTRODUCTION:Dynamic variations in electrophysiologic phenomena inherent to the Brugada syndrome may complicate therapy with implantable cardioverter defibrillators (ICDs). METHODS AND RESULTS:Between 1997 and 1999, 3 of 7 patients with Brugada syndrome (1 man and 2 women, mean age 42 years) received an ICD. During fo...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/j.1540-8167.2000.tb00004.x
更新日期:2000-05-01 00:00:00
abstract:BACKGROUND:The presence of a single left superior vena cava in the absence of complex congenital heart disease is uncommon, and, in the absence of hemodynamic consequences, it would not be expected to result in cardiovascular signs or symptoms. Single case reports and our anecdotal experience suggested to us that this ...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/j.1540-8167.2008.01307.x
更新日期:2009-02-01 00:00:00
abstract::Watch a video presentation of this article. For additional educational resources, please visit Medtronic Academy . ...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/jce.13216
更新日期:2017-06-01 00:00:00
abstract:INTRODUCTION:This study was performed to determine the effect on the P wave of different hemodynamic loads to the heart. METHODS AND RESULTS:Signal-averaged P wave ECG and atrial echocardiographic measurements were obtained from eight healthy male volunteers at rest and after infusion of 1000 mL of plasma expander (Ha...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/j.1540-8167.1994.tb01142.x
更新日期:1994-12-01 00:00:00
abstract:BACKGROUND:Transseptal access for large sheaths may be encumbered by tissue resistance against the sheath-dilator stepped interface. The ExpanSure Large Access Transseptal Dilator (Baylis Medical) is designed as a single introducer and dilation device with a smooth sheath-dilator transition to support transseptal punct...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/jce.14903
更新日期:2021-01-21 00:00:00
abstract:INTRODUCTION:Although premature beats originating in areas of ischemia have been shown to be important in initiating ventricular fibrillation (VF), the participation of the ischemic zone in maintenance of VF has not been investigated. METHODS AND RESULTS:Ten normal dogs underwent induction of two separate episodes of ...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/j.1540-8167.1999.tb00282.x
更新日期:1999-08-01 00:00:00
abstract::The Res-Q Arrhythmia Control Device (Intermedics Inc.) is one of the latest entries into the growing implantable cardioverter defibrillator (ICD) market. Dysrhythmias are classified according to their zone of detection, with a bradycardia zone, up to 3 tachycardia zones, and a fibrillation zone. Detection criterion, t...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章,评审
doi:10.1111/j.1540-8167.1995.tb00766.x
更新日期:1995-02-01 00:00:00
abstract:INTRODUCTION:Atrial arrhythmias have emerged as a topic of great interest for clinical electrophysiologists. Noninvasive imaging of electrical function in humans may be useful for computer-aided diagnosis and treatment of cardiac arrhythmias, which can be accomplished by the fusion of data from ECG mapping and magnetic...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 临床试验,杂志文章
doi:10.1046/j.1540-8167.2003.02558.x
更新日期:2003-07-01 00:00:00
abstract:BACKGROUND:When double potentials (DP) on the line of block are difficult to see, we propose another simple method to verify complete bidirectional block (CBDB) at the end of an atrial flutter ablation. We measured the interval between the electrograms immediately on either side of the line of block on a multipole cath...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 临床试验,杂志文章
doi:10.1111/j.1540-8167.2007.00968.x
更新日期:2008-01-01 00:00:00
abstract:INTRODUCTION:Gender differences and seasonal variations in cardiac electrophysiology and susceptibility to arrhythmias have been described clinically. The present study was undertaken to determine if there are similar gender and seasonally related differences in the electrophysiology of the rabbit heart. METHODS AND R...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/j.1540-8167.2000.tb00067.x
更新日期:2000-08-01 00:00:00
abstract:BACKGROUND:Ablation of atrial tachycardia (AT) that occurs after cardiac surgery or prior ablation often requires complex lesion sets. In combination with the pre-existing atrial scar, these lesion sets may result in inadvertent intra-atrial conduction block. This study reports the phenomenon of incidental isolation of...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/jce.14037
更新日期:2019-10-01 00:00:00
abstract:INTRODUCTION:Recent studies have implicated repolarization lability in the genesis of malignant ventricular arrhythmias. However, few data exist on assessment of temporal QT interval variability and its relation to arrhythmogenesis. We tested the ability of the QT variability index (QTVI), a measure of beat-to-beat QT ...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/j.1540-8167.1998.tb00130.x
更新日期:1998-09-01 00:00:00
abstract:INTRODUCTION:Blockade of the rapid delayed rectifier potassium current (IKr) as an important mechanism for current Class III antiarrhythmics is less effective in action potential prolongation during beta-adrenergic activation. We hypothesized that blockade of the increased slow IK (IKs) current during beta-adrenergic s...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/j.1540-8167.1997.tb01039.x
更新日期:1997-12-01 00:00:00
abstract:INTRODUCTION:Frequency-dependent electrophysiologic actions of oral quinidine and oral sotalol may be clinically important, but these properties and their modulation by beta-adrenergic sympathetic stimulation have not been determined. METHODS AND RESULTS:The frequency-dependent effects of oral quinidine (n = 17) and o...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/j.1540-8167.1996.tb00505.x
更新日期:1996-02-01 00:00:00
abstract::When an implanted device is infected, complete explantation of the device system, including lead extraction, is usually required. Superficial problems with wound healing may be managed more conservatively, but distinguishing between a surface process and deeper infection can pose a clinical challenge. We present a cas...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/j.1540-8167.2011.02224.x
更新日期:2012-03-01 00:00:00
abstract:BACKGROUND:Reentry utilizing cavotricuspid isthmus (CTI) is accepted as the mechanism underlying typical atrial flutter (AFLT). However, it is unclear how the right atrial (RA) posterior wall (PW) participates in AFLT circuit. We sought to investigate this by using noncontact electroanatomic mapping. METHODS:Fifteen p...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/j.1540-8167.2010.01917.x
更新日期:2011-04-01 00:00:00
abstract:INTRODUCTION:Determination of the optimal electrode configuration during implantable cardioverter defibrillator (ICD) implantation remains largely an empirical process. This study investigated the feasibility of using a finite element model of the thorax to predict clinical defibrillation metrics for internal defibrill...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/j.1540-8167.1997.tb00822.x
更新日期:1997-05-01 00:00:00
abstract:INTRODUCTION:We observed a change in the atrial activation sequence during radiofrequency (RF) energy application in patients undergoing left accessory pathway (AP) ablation. This occurred without damage to the AP and in the absence of a second AP or alternative arrhythmia mechanism. We hypothesized that block in a lef...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1046/j.1540-8167.2001.00744.x
更新日期:2001-07-01 00:00:00
abstract:BACKGROUND:Implantable cardioverter defibrillators (ICDs) reduce all-cause mortality among cardiomyopathy patients. Whether or not antitachycardia pacing (ATP) is equally effective in ischemic (ICM) and nonischemic (NICM) cardiomyopathy patients remains poorly understood. We describe the distribution of monomorphic (MV...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/jce.14688
更新日期:2020-10-01 00:00:00
abstract:INTRODUCTION:Atrial fibrillation (AF) ablation is increasingly common, but is associated with potential major complications. Technology, experience, and protocols have evolved significantly in recent times, and may have impacted procedural safety. We sought to compare AF ablation safety profiles, including complication...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/jce.13484
更新日期:2018-06-01 00:00:00