abstract：INTRODUCTION:Studies suggest that entrainment response (ER) of reentrant tachycardia to overdrive pacing can be estimated using signals from sites other than the paced site. METHODS AND RESULTS:A formula for estimation of ER using remote sites against the difference between the postpacing interval (PPI) and tachycardi...

journal_title：Journal of cardiovascular electrophysiology

authors： Hammer PE,Brooks DH,Triedman JK

更新日期：2003-01-01 00:00:00

abstract：:The heart's pacemaker, the sinoatrial node, does not consist of a group of uniform sinoatrial node cells embedded in atrial muscle. Instead, it is a heterogeneous tissue with multiple cell types and a complex structure. Evidence suggests that from the periphery to the center of the sinoatrial node, there is a gradient...

journal_title：Journal of cardiovascular electrophysiology

authors： Boyett MR,Dobrzynski H,Lancaster MK,Jones SA,Honjo H,Kodama I

更新日期：2003-01-01 00:00:00

abstract：INTRODUCTION:Pacing is believed to prevent atrial fibrillation by reducing atrial activation time. Exact correlation between P wave duration (PWD) on surface ECG and endocardial atrial activation time is still unexplored. METHODS AND RESULTS:In 15 patients without structural heart disease (9 women, age 45 +/- 14 years...

journal_title：Journal of cardiovascular electrophysiology

authors： Gozolits S,Fischer G,Berger T,Hanser F,Abou-Harb M,Tilg B,Pachinger O,Hintringer F,Roithinger FX

更新日期：2002-12-01 00:00:00

abstract：:We report the case of a 44-year-old woman with obstructive hypertrophic cardiomyopathy without history of prior arrhythmias who underwent surgical myectomy. She developed symptomatic postoperative atrial fibrillation (AF) that was refractory to antiarrhythmic therapy and could not be adequately rate controlled. AF alw...

journal_title：Journal of cardiovascular electrophysiology

authors： Saad EB,Saliba WI,Marrouche NF,Natale A

更新日期：2002-12-01 00:00:00

abstract：INTRODUCTION:Ventricular fibrillation and ventricular flutter (cycle length < or = 230 msec) induced at electrophysiologic studies are thought to be nonspecific findings in patients presenting with syncope of unknown origin. However, there are limited data on the prognosis of these patients in long-term follow-up. MET...

journal_title：Journal of cardiovascular electrophysiology

authors： Link MS,Saeed M,Gupta N,Homoud MK,Wang PJ,Estes NA 3rd

更新日期：2002-11-01 00:00:00

abstract：:Characterization of the substrate and mechanism of epicardial ventricular tachycardia (VT) associated with idiopathic nonischemic dilated cardiomyopathy is limited. We report a case of successful mapping and ablation of an epicardial VT by a percutaneous transthoracic approach in a patient with idiopathic dilated card...

journal_title：Journal of cardiovascular electrophysiology

authors： Swarup V,Morton JB,Arruda M,Wilber DJ

更新日期：2002-11-01 00:00:00

abstract：INTRODUCTION:The aim of this study is to describe implantation techniques and lead performance for biventricular pacing, dual-chamber implantable cardioverter defibrillators (ICDs). METHODS AND RESULTS:A dual-chamber ICD with biventricular pacing was implanted in 87 patients with congestive heart failure (ejection fra...

journal_title：Journal of cardiovascular electrophysiology

authors： Daoud EG,Kalbfleisch SJ,Hummel JD,Weiss R,Augustini RS,Duff SB,Polsinelli G,Castor J,Meta T

更新日期：2002-10-01 00:00:00

abstract：INTRODUCTION:The aim of this study was to determine the atrial defibrillation threshold (ADFT) of a first shock across the standard right atrium (RA) to distal coronary sinus (dCS) configuration followed by a second shock along the atrial septum with a standard sequential waveform (the second shock leading edge equaled...

journal_title：Journal of cardiovascular electrophysiology

authors： Zheng X,Benser ME,Walcott GP,Smith WM,Ideker RE

更新日期：2002-09-01 00:00:00

abstract：INTRODUCTION:The value of noninvasive markers reflecting repolarization and/or conduction abnormalities in identifying patients with abnormal ECG showing a pattern of atypical right bundle branch block and ST elevation syndrome (Brugada syndrome) at risk for life-threatening arrhythmias is controversial. Because right ...

journal_title：Journal of cardiovascular electrophysiology

authors： Eckardt L,Bruns HJ,Paul M,Kirchhof P,Schulze-Bahr E,Wichter T,Breithardt G,Borggrefe M,Haverkamp W

更新日期：2002-08-01 00:00:00

abstract：INTRODUCTION:Anatomic and electrical connections between the left atrium and right atrium (RA) have been described. The relationship between coronary sinus (CS) pacing site and RA activation has not been examined. METHODS AND RESULTS:Fifteen anesthetized swine underwent high-density noncontact mapping of the RA during...

journal_title：Journal of cardiovascular electrophysiology

authors： Betts TR,Ho SY,Sanchez-Quintana D,Roberts PR,Anderson RH,Morgan JM

更新日期：2002-08-01 00:00:00

abstract：INTRODUCTION:Recent defibrillation studies show that electric fields interact with reentrant activity in myocardial tissue through virtual electrode polarization (VEP). This study focuses on determining how VEP relates to the creation and survival of postshock phase singularities in cardiac tissue and demonstrating tha...

journal_title：Journal of cardiovascular electrophysiology

authors： Eason J,Trayanova N

更新日期：2002-07-01 00:00:00

abstract：INTRODUCTION:Atrial fibrillation (AF) in the left atrium (LA) is poorly defined in terms of regional differences in the degree of organization, characteristics of paroxysmal and persistent variants, and electrophysiologic events that develop at the onset of episodes. METHODS AND RESULTS:The study population consisted ...

journal_title：Journal of cardiovascular electrophysiology

authors： Ndrepepa G,Karch MR,Schneider MA,Weyerbrock S,Schreieck J,Deisenhofer I,Zrenner B,Schömig A,Schmitt C

更新日期：2002-06-01 00:00:00

abstract：INTRODUCTION:Radiofrequency ablation (RFCA) of ventricular tachycardia (VT) is a potential curative treatment modality. We evaluated the results of RFCA in patients with VT. METHODS AND RESULTS:One hundred fifty-one consecutive patients (122 men and 29 women; age 57 +/- 16 years) with drug-refractory VT were treated. ...

journal_title：Journal of cardiovascular electrophysiology

authors： Borger van der Burg AE,de Groot NM,van Erven L,Bootsma M,van der Wall EE,Schalij MJ

更新日期：2002-05-01 00:00:00

abstract：INTRODUCTION:Thoracic spinal cord stimulation (SCS) has been used to treat angina pectoris and to produce cardiac autonomic control. We studied the effect of thoracic SCS on sinus node and AV nodal function to test the hypothesis that SCS modulated autonomic regulation of the electrophysiology of these structures. MET...

journal_title：Journal of cardiovascular electrophysiology

authors： Olgin JE,Takahashi T,Wilson E,Vereckei A,Steinberg H,Zipes DP

更新日期：2002-05-01 00:00:00

abstract：INTRODUCTION:Two randomized trials (Multicenter Automatic Defibrillator Implantation Trial [MADIT] and Multicenter Unsustained Tachycardia Trial [MUSTT]) suggest that implantable cardioverter defibrillator (ICD) placement is associated with improved survival in patients with coronary artery disease, depressed left vent...

journal_title：Journal of cardiovascular electrophysiology

authors： Mittal S,Lomnitz DJ,Mirchandani S,Stein KM,Markowitz SM,Slotwiner DJ,Iwai S,Das MK,Lerman BB

更新日期：2002-04-01 00:00:00

abstract：:Atrial fibrillation (AF) and congestive heart failure (CHF) are two increasingly common cardiac disorders with a growing prevalence in the overall population. Improved treatment of acute medical conditions has increased the incidence of these cardiac disorders. AF and CHF have similar epidemiologic characteristics and...

journal_title：Journal of cardiovascular electrophysiology

authors： Ehrlich JR,Nattel S,Hohnloser SH

更新日期：2002-04-01 00:00:00

abstract：INTRODUCTION:Early recurrence of atrial fibrillation (AF) after cardioversion may be related to shortening of the atrial effective refractory period (ERP). This study compared the effects of verapamil and ibutilide on AF cycle length (AFCL), atrial ERP, and susceptibility to recurrent AF. METHODS AND RESULTS:In 33 adu...

journal_title：Journal of cardiovascular electrophysiology

authors： Sticherling C,Hsu W,Tada H,Bares AC,Oral H,Pelosi F,Knight BP,Strickberger SA,Morady F

更新日期：2002-02-01 00:00:00

abstract：:Heart failure is a common debilitating condition for which pharmacologic therapy thus far has provided only partial relief. Despite, and sometimes because of, medical therapy, the overall prognosis remains poor, with high rates of sudden death and death from progressive heart failure. Device-based therapies offer cons...

journal_title：Journal of cardiovascular electrophysiology

authors： Cleland JG,Thackray S,Goodge L,Kaye G,Cooklin M

更新日期：2002-01-01 00:00:00

abstract：:Cost-efficacy assessment of implantable cardioverter defibrillator (ICD) therapy has proved contentious and may have limited uptake of ICD therapy, particularly in Europe. Published modeling assessments are too inaccurate to determine clinical practice, and assessments based on clinical studies are incomplete (from th...

journal_title：Journal of cardiovascular electrophysiology

authors： Morgan JM

更新日期：2002-01-01 00:00:00

abstract：INTRODUCTION:Biventricular pacing improves functional status in the majority of patients with drug-refractory heart failure, dilated cardiomyopathy, and interventricular conduction delay. The aim of this study was to analyze the baseline clinical and functional data of a cohort of patients implanted with a biventricula...

journal_title：Journal of cardiovascular electrophysiology

authors： Lunati M,Paolucci M,Oliva F,Frigerio M,Magenta G,Cattafi G,Vecchi R,Vicini I,Cavaglià S

更新日期：2002-01-01 00:00:00

abstract：INTRODUCTION:Pulmonary vein potentials reflect depolarization of muscle fascicles within the myocardial sleeves that surround the pulmonary veins. The response of pulmonary vein potentials to premature stimulation has not been described. METHODS AND RESULTS:In 31 patients with paroxysmal atrial fibrillation referred f...

journal_title：Journal of cardiovascular electrophysiology

authors： Tada H,Oral H,Ozaydin M,Greenstein R,Pelosi F Jr,Knight BP,Strickberger SA,Morady F

更新日期：2002-01-01 00:00:00

abstract：:Atrial tachyarrhythmias are the most common arrhythmias in the general population. The abundant experimental evidence suggests that the autonomic nervous system plays an important role in the occurrence of atrial arrhythmias. However, complex interactions of the autonomic nervous system with the arrhythmogenic substra...

journal_title：Journal of cardiovascular electrophysiology

authors： Tai CT,Chiou CW,Chen SA

更新日期：2002-01-01 00:00:00

abstract：INTRODUCTION:The low frequency of spontaneous premature atrial contractions (PACs) may be an impediment to mapping and ablation of atrial fibrillation (AF). It has been shown that PACs following external or internal cardioversion of AF can initiate AF. If this method could reproducibly induce PACs from the same locatio...

journal_title：Journal of cardiovascular electrophysiology

authors： Sra J,Zaidi ST,Krum D,Georgakopoulos N,Ahmad A,Akhtar M

更新日期：2001-12-01 00:00:00

abstract：:In patients with Wolff-Parkinson-White syndrome, right anteroseptal accessory pathways are uncommon and run from the atrium to the ventricle in close anatomic proximity to the normal AV conduction system. Radiofrequency catheter ablation is the first-line therapy for elimination of these accessory pathways. Although t...

journal_title：Journal of cardiovascular electrophysiology

authors： Kimman GJ,Szili-Torok T,Theuns DA,Jordaens LJ

更新日期：2001-12-01 00:00:00

abstract：INTRODUCTION:Hyperventilation has been demonstrated to alter autonomic function. Sympathomimetic drugs (isoproterenol) and parasympatholytic drugs (atropine) may be needed to facilitate induction of supraventricular tachycardia (SVT). The aim of this study was to test the clinical utility and mechanisms of hyperventila...

journal_title：Journal of cardiovascular electrophysiology

authors： Chen CC,Chen SA,Tai CT,Kuo TB,Chang MS,Prystowsky EN

更新日期：2001-11-01 00:00:00

abstract：INTRODUCTION:Patients with bradycardia requiring permanent pacing frequently suffer from additional atrial tachyarrhythmias (ATs). This study evaluated the safety and efficacy of atrial antitachycardia pacing (ATP) and the performance of pacing for AT prevention implemented into a new pacemaker. METHODS AND RESULTS:In...

journal_title：Journal of cardiovascular electrophysiology

authors： Israel CW,Hügl B,Unterberg C,Lawo T,Kennis I,Hettrick D,Hohnloser SH,AT500 Verification Study Investigators.

更新日期：2001-10-01 00:00:00

abstract：:A case of iterative atrial tachycardia leading to dilated cardiomyopathy is reported. During electrophysiologic study, the tachycardia showed a markedly irregular cycle length associated with changes in atrial activation breakthrough as demonstrated by coronary sinus (CS) recordings and frequently degenerated into sel...

journal_title：Journal of cardiovascular electrophysiology

authors： Tritto M,Zardini M,De Ponti R,Salerno-Uriarte JA

更新日期：2001-10-01 00:00:00

abstract：INTRODUCTION:The mechanisms by which Class IC drugs slow the rate of functional reentrant arrhythmias are not completely understood. We hypothesized that flecainide widens the excitable gap beyond the pivot point of premature turning wavefronts. METHODS AND RESULTS:In eight perfused subepicardial layers of rabbit left...

journal_title：Journal of cardiovascular electrophysiology

authors： Danse PW,Garratt CJ,Allessie MA

更新日期：2001-09-01 00:00:00

abstract：:A 70-year-old man with a single-chamber implantable cardioverter defibrillator (ICD) placed for ventricular tachycardia presented with syncope. He was found to have ventricular flutter/fibrillation with capacitor charge time in excess of 1 minute before defibrillation. The excessive charge time was secondary to ICD ca...

journal_title：Journal of cardiovascular electrophysiology

authors： Panchal VR,Groh WJ

更新日期：2001-09-01 00:00:00

abstract：INTRODUCTION:Ablative therapy for atrial fibrillation (AF) by targeting initiating triggers, usually in or around the pulmonary veins, has been reported by several centers. Evidence for an overall improvement in quality of life (QOL) and amelioration of symptoms is lacking. METHODS AND RESULTS:Seventy-one patients und...

journal_title：Journal of cardiovascular electrophysiology

authors： Gerstenfeld EP,Guerra P,Sparks PB,Hattori K,Lesh MD

更新日期：2001-08-01 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

authors： Kasaoka Y,Ajiki K,Hayami N,Murakawa Y

更新日期：2001-08-01 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

authors： Luria DM,Nemec J,Etheridge SP,Compton SJ,Klein RC,Chugh SS,Munger TM,Shen WK,Packer DL,Jahangir A,Rea RF,Hammill SC,Friedman PA

更新日期：2001-07-01 00:00:00

abstract：:We report the case of a 28-year-old man with no structural heart disease, who exhibited clearly augmented ST segment elevation in the right precordial leads, followed by induction of spontaneous right ventricular outflow tract tachycardia with intravenous administration of Class IA antiarrhythmic drugs. The electrophy...

journal_title：Journal of cardiovascular electrophysiology

authors： Ogawa M,Kumagai K,Saku K

更新日期：2001-07-01 00:00:00

abstract：INTRODUCTION:The exit site and central common pathway of slow conduction are preferred sites to guide radiofrequency ablation of postinfarction ventricular tachycardia (VT). Both require inducibility of VT. In addition, their low amplitude hampers direct recording of potentials generated by activation in pathways of sl...

journal_title：Journal of cardiovascular electrophysiology

authors： van Dessel PF,de Bakker JM,van Hemel NM,Linnenbank AC,Jessurun ER,Defauw JA

更新日期：2001-06-01 00:00:00

abstract：INTRODUCTION:This study investigated a hybrid approach to reduce the atrial defibrillation threshold (ADFT) by determining the effect of a single linear radiofrequency ablation (RFA) lesion on both the ADFT and activation patterns during atrial fibrillation (AF). METHODS AND RESULTS:In 18 open chest sheep (45 to 57 kg...

journal_title：Journal of cardiovascular electrophysiology

authors： White JB,Fotuhi PC,Pedoto RW,Chattipakorn N,Rogers JM,Ideker RE

更新日期：2001-04-01 00:00:00

abstract：INTRODUCTION:Electrical stimuli produce a spatial distribution of voltage across the heart. We hypothesized that the potential difference between tissue near a stimulating electrode and a remote site could cause sufficient current to flow through a highly conductive wire connecting the two sites to directly stimulate t...

journal_title：Journal of cardiovascular electrophysiology

authors： Girouard S,Ideker R

更新日期：2001-03-01 00:00:00

abstract：INTRODUCTION:This study was designed to analyze dynamic changes in autonomic tone preceding the onset of sustained atrial arrhythmias in patients with focal atrial fibrillation (AF) to determine why patients with frequent discharge from the arrhythmogenic foci develop sustained AF. METHODS AND RESULTS:Holter tapes fro...

journal_title：Journal of cardiovascular electrophysiology

authors： Zimmermann M,Kalusche D

更新日期：2001-03-01 00:00:00

abstract：INTRODUCTION:Discriminating between ventricular tachycardia (VT) with 1:1 ventriculoatrial association and sinus tachycardia can be difficult, even when assisted by intracardiac tracings. In this study, we used a new computer algorithm to perform correlation waveform analyses on intracardiac atrial electrograms to help...

journal_title：Journal of cardiovascular electrophysiology

authors： Saba S,Gorodeski R,Yang S,MacAdam D,Link MS,Homoud MK,Estes NA 3rd,Wang PJ

更新日期：2001-02-01 00:00:00

abstract：INTRODUCTION:The slope of the power spectrum in heart rate variability (HRV) reflects the fractal or scaling behavior in HR dynamics and recently was confirmed as an independent predictor of postmyocardial infarction survival. Whether or not the new measurement in HRV foresees the functional evolution in patients with ...

journal_title：Journal of cardiovascular electrophysiology

authors： Lin LY,Lin JL,Du CC,Lai LP,Tseng YZ,Huang SK

更新日期：2001-01-01 00:00:00

abstract：INTRODUCTION:Atrial dilation and rapid pacing reduce atrial effective refractory periods (AERPs), thereby increasing the susceptibility to sustained atrial fibrillation (AF) in Langendorff-perfused rabbit hearts. It is unclear whether similar pathophysiologic mechanisms are operative in short-term electrophysiologic ch...

journal_title：Journal of cardiovascular electrophysiology

authors： Zarse M,Stellbrink C,Athanatou E,Robert J,Schotten U,Hanrath P

更新日期：2001-01-01 00:00:00