Abstract:
BACKGROUND:The relationship between postdefibrillation ventricular arrhythmias and shock strength is poorly understood in patients with implantable defibrillators. The purpose of this study was to characterize the relationship between postdefibrillation ventricular arrhythmias and shock strength. METHODS AND RESULTS:Forty-three patients with an implanted defibrillator underwent six separate inductions of ventricular fibrillation (VF) after a step-down defibrillation energy requirement (7.3 +/- 4.6 J) was determined. For each of the first three inductions of VF, the first two shocks were low energy and equal to approximately 75% of the defibrillation energy requirement (5.4 +/- 3.3 J), or to the defibrillation energy requirement plus 10 J (17.5 +/- 4.3 J). After the first two shocks, subsequent shocks were programmed to the maximum available energy (29.0 +/- 2.5 J). The alternate technique was used for the subsequent three inductions of VF. Postdefibrillation ventricular arrhythmias were noted. Postdefibrillation ventricular arrhythmias with a cycle length < or = 300 msec were more frequent after a low-energy shock (19%), than after a high-energy shock (1.5%; P = 0.005). Postdefibrillation ventricular arrhythmias with a cycle length < or = 300 msec were more frequent after a high-energy shock (32%), than after a low-energy shock (7.1%; P = 0.002). A relationship between the cycle length of the postdefibrillation ventricular arrhythmias and the absolute defibrillation energy was observed (P < 0.001; r = 0.6), and ventricular arrhythmias with a cycle length > 300 msec were uncommon after shocks < or = 10 J (P = 0.001). The characteristics of ventricular arrhythmias after maximum-energy shocks were similar to those that occurred after high-energy shocks. CONCLUSIONS:Postdefibrillation ventricular arrhythmias with a cycle length < or = 300 msec are more common after shocks of strength associated with a low probability of successful defibrillation. Postdefibrillation ventricular arrhythmias with a cycle length of > 300 msec are more common after high- and maximum-energy shocks, and are directly related to the absolute defibrillation energy.
journal_name
J Cardiovasc Electrophysioljournal_title
Journal of cardiovascular electrophysiologyauthors
Zivin A,Souza J,Pelosi F,Flemming M,Knight BP,Goyal R,Morady F,Strickberger SAdoi
10.1111/j.1540-8167.1999.tb00685.xkeywords:
subject
Has Abstractpub_date
1999-03-01 00:00:00pages
370-7issue
3eissn
1045-3873issn
1540-8167journal_volume
10pub_type
杂志文章abstract::Innovations in radiofrequency (RF) ablation and nonablative techniques have led to significant advances in addressing complex arrhythmogenic substrates for a variety of cardiac arrhythmias. Anatomical challenges, deep substrate, and mid-myocardial locations may pose difficulties and decrease success rates using routin...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章,评审
doi:10.1111/jce.14317
更新日期:2020-01-01 00:00:00
abstract:BACKGROUND:Esophageal injury during left atrial ablation is associated with a significant risk of mortality and morbidity. There are no validated approaches to reduce injury outside of avoidance, a strategy critically dependent on a precise understanding of the esophageal anatomy and location. Intracardiac ultrasound (...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/j.1540-8167.2012.02441.x
更新日期:2013-01-01 00:00:00
abstract:BACKGROUND:Stroke risk is a significant concern in patients with atrial fibrillation (AF). Low stroke risk patients (CHADS2 VASc 0-2) are often treated long-term with aspirin after catheter ablation. Defining the long-term risks versus benefits of aspirin therapy, after an ablation, is essential to validate this common...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/jce.13327
更新日期:2017-11-01 00:00:00
abstract:BACKGROUND AND OBJECTIVES:Catheter ablation of ventricular tachycardia (VT) may include induction of VT and localization of VT-exit site. Our aim was to assess localization performance of a novel statistical pace-mapping method and compare it with performance of an electrocardiographic inverse solution. METHODS:Seven ...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/jce.13622
更新日期:2018-07-01 00:00:00
abstract::The cavotricuspid isthmus (CVTI) is the well-established location of atrial tissue critical for the maintenance of typical atrial flutter. The CVTI begins at the electrically inert tricuspid valve and includes the atrial myocardium up to the inferior vena cava (IVC). In this article, we discuss relevant CVTI and right...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章,评审
doi:10.1111/j.1540-8167.2008.01344.x
更新日期:2009-01-01 00:00:00
abstract:INTRODUCTION:Catheter ablation is an effective treatment of scar-related ventricular tachycardia (VT), but the overall complexity of the procedure has precluded its widespread use. Remote magnetic navigation (RMN) has been shown to facilitate cardiac mapping and ablation of VT in a retrospective series. STOP-VT is the ...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章,多中心研究
doi:10.1111/jce.12910
更新日期:2016-03-01 00:00:00
abstract:BACKGROUND:The purpose of this study was to assess how well acute procedural outcomes predict the clinical outcome of catheter ablation of premature ventricular complexes (PVCs). METHODS:A consecutive series of 50 patients (28 women, age: 51 ± 13 years) with frequent PVCs was referred for PVC ablation. Acute failure w...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/jce.12400
更新日期:2014-06-01 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: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:BACKGROUND:Close association between atrial fibrillation (AF) and brain natriuretic peptide (BNP) has been demonstrated by several studies. Important gender differences exist in AF patients including a higher plasma BNP level in women. Therefore, it is imperative to evaluate the relationship between AF and BNP separate...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/j.1540-8167.2011.02036.x
更新日期:2011-08-01 00:00:00
abstract:UNLABELLED:VT Ablation in Apical Hypertrophic Cardiomyopathy. INTRODUCTION:Monomorphic ventricular tachycardia (VT) is uncommon in apical hypertrophic cardiomyopathy (HCM). The purpose of this study was to define the substrate and role of catheter ablation for VT in apical HCM. METHODS:Four patients with apical HCM ...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/j.1540-8167.2010.01875.x
更新日期:2011-01-01 00:00:00
abstract:INTRODUCTION:The objective of this study was to determine whether the effect of isoproterenol (Iso) to increase L-type Ca2+ current [I(Ca(L))] and action potential duration (APD) was potentiated in ventricular myocytes following termination of an exposure of these cells to acetylcholine (ACh), and whether this potentia...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/j.1540-8167.1998.tb00959.x
更新日期:1998-07-01 00:00:00
abstract::We describe a case of symptomatic pseudo-AV block due to His-bundle parasystole masquerading as exercise-induced 2:1 AV block. Electrophysiologic study revealed the presence of His-bundle parasystole, and the fluctuation of parasystolic cycle length could be explained by the concept of modulated parasystole. Modulated...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1046/j.1540-8167.2001.00965.x
更新日期:2001-08-01 00:00:00
abstract::Left-sided anteroseptal accessory pathways that course through the aortomitral fibrous continuity are some of the rarest types of accessory pathways. At this region the atrium and ventricle are separated by their greatest distance because of the intervening aortic valve. These pathways often have a long circuitous cou...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/j.1540-8167.2012.02440.x
更新日期:2013-04-01 00:00:00
abstract:INTRODUCTION:Frequent premature ventricular contractions (PVCs) can cause cardiomyopathy (CM). Postextrasystolic potentiation (PESP) and irregularity have been in implicated as triggers of PVC-CM. Because both phenomena can also be found in premature atrial contractions (PACs), it is speculated that frequent PACs have ...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/jce.14067
更新日期:2019-10-01 00:00:00
abstract::Although the annual incidence of sudden cardiac death (SCD) is dropping in the United States, therapies for the patient who has survived a SCD episode or is at high risk of developing SCD in the future are now well established. The implantable cardioverter defibrillator (ICD) has emerged from a series of well done ran...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章,评审
doi:10.1111/j.1540-8167.2005.50127.x
更新日期:2005-09-01 00:00:00
abstract::Commotio cordis (CC), sudden death as a result of a blunt, often innocent-appearing chest wall blow, is being reported with increasing frequency. The clinical spectrum is diverse; however, a substantial number of cases occur in youth athletics. In events that occur during sport, victims are struck by projectiles regar...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章,评审
doi:10.1111/j.1540-8167.2006.00684.x
更新日期:2007-01-01 00:00:00
abstract:INTRODUCTION:Repolarization dynamics, reflecting adaptation of QT to changing heart rate, is considered a marker of unfavorable prognosis in patients with heart diseases. We aimed to evaluate the prognostic value of QT/RR slope in predicting total mortality (TM) and sudden death (SD) in patients with congestive heart f...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/j.1540-8167.2008.01210.x
更新日期:2008-10-01 00:00:00
abstract:INTRODUCTION:Stimulants are the mainstay therapy for attention deficit/hyperactivity disorder (ADHD) and are associated with adrenergic side effects. There are limited data on the clinical course of patients treated for ADHD who have long-QT syndrome (LQTS), for which β-blockade is the goal of therapy. METHODS:LQTS pa...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章,随机对照试验
doi:10.1111/jce.12739
更新日期:2015-10-01 00:00:00
abstract:INTRODUCTION:Complex fractionated atrial electrograms (CFAE) may identify critical sites for perpetuation of atrial fibrillation (AF) and provide useful targets for ablation. Current assessment of CFAE is subjective; automated detection algorithms may improve reproducibility, but their utility in guiding ablation has n...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/j.1540-8167.2008.01189.x
更新日期:2008-06-01 00:00:00
abstract:INTRODUCTION:Implantable cardioverter-defibrillator (ICD) longevity is crucial for both patients and public health systems because it determines the number of surgical ICD replacements, which can generally be considered an additional risk factor for complications, and the cost-effectiveness of ICD therapy. Our objectiv...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/j.1540-8167.2012.02408.x
更新日期:2012-12-01 00:00:00
abstract:INTRODUCTION:EnSite NavX (NavX) is a novel mapping and navigation system that allows visualization of conventional catheters for diagnostic and ablative purposes and uses them to create a three-dimensional (3D) geometry of the heart. NavX is particularly suitable for ablation procedures utilizing an anatomic approach, ...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1046/j.1540-8167.2004.04064.x
更新日期:2004-10-01 00:00:00
abstract:INTRODUCTION:This study was designed to record global high-density maps of left atrial endocardial activation during sinus rhythm and coronary sinus pacing. METHOD AND RESULTS:Noncontact mapping of the left atrium was performed in nine patients with paroxysmal atrial fibrillation undergoing pulmonary vein ablation pro...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1046/j.1540-8167.2004.04078.x
更新日期:2004-10-01 00:00:00
abstract::Autonomic dysfunction may occur as a consequence of radiofrequency (RF) catheter ablation of a variety of supraventricular tachycardias. Effects suggestive of autonomic dysfunction that may be seen acutely during the ablation procedure include sudden profound slowing of the sinus rate or transient AV block. These abno...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章,评审
doi:10.1111/j.1540-8167.1996.tb00550.x
更新日期:1996-05-01 00:00:00
abstract::Arrhythmogenic right ventricular cardiomyopathy (ARVC) is an uncommon cardiomyopathy most classically associated with mutations in genes encoding desmosomal proteins. Recent literature has identified mutations in several non-desmosomal proteins including lamins that may result in the ARVC phenotype. We describe a pati...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/jce.12984
更新日期:2016-07-01 00:00:00
abstract::Retrograde lower common pathway block during AV nodal reentrant tachycardia has rarely been reported. In this report, we demonstrate retrograde ventriculoatrial block during sinus rhythm and during AV nodal reentrant tachycardia in a woman with recurrent supraventricular tachycardia. In addition, evidence of antegrade...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/j.1540-8167.2010.01991.x
更新日期:2011-08-01 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:INTRODUCTION:Frequent premature ventricular complexes (PVCs) can lead to symptoms, such as cardiomyopathy and increased mortality. Beta-blockers are recommended as first-line therapy to reduce PVC burden; however, the response is unpredictable. The objective of this study is to determine whether PVC diurnal-variability...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/jce.13944
更新日期:2019-06-01 00:00:00
abstract:INTRODUCTION:We compared the efficacy and safety of amiodarone and dronedarone in patients with persistent atrial fibrillation (AF). METHODS:Five hundred and four amiodarone-naïve patients were randomized to receive dronedarone 400 mg bid (n = 249) or amiodarone 600 mg qd for 28 days then 200 mg qd (n = 255) for at le...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1111/j.1540-8167.2010.01764.x
更新日期:2010-06-01 00:00:00
abstract:BACKGROUND:The reliable endpoint for ablation of longstanding persistent atrial fibrillation (LPAF) has not been clearly established. METHODS AND RESULTS:This study included 140 patients who underwent catheter ablation for drug-refractory LPAF. A stepwise ablation approach included circumferential pulmonary vein isola...
journal_title:Journal of cardiovascular electrophysiology
pub_type: 杂志文章
doi:10.1111/j.1540-8167.2012.02370.x
更新日期:2012-10-01 00:00:00