abstract：:It is well established that impulse propagation in cardiac tissue is determined by the interaction between active membrane properties and the passive electrical characteristics of the network formed by individual myocytes. In the past, the intricate microarchitecture of intact cardiac tissue and the limited spatial re...

journal_title：Journal of cardiovascular electrophysiology

authors： Rohr S

更新日期：1995-07-01 00:00:00

abstract：INTRODUCTION:Bundle branch reentry (BBR) typically occurs in patients with dilated cardiomyopathy and infra-Hisian conduction system disease. The macroreentrant circuit of BBR is confined to the His-Purkinje system (HPS) and ventricular myocardium. As such, the atrioventricular (AV) node plays no role in the tachycardi...

journal_title：Journal of cardiovascular electrophysiology

authors： Markowitz SM,Stein KM,Engelstein ED,Lerman BB

更新日期：1995-05-01 00:00:00

abstract：INTRODUCTION:The purpose of this investigation was to study the transmembrane potential changes (delta Vm) during extracellular electrical field stimulation. METHODS AND RESULTS:Vm was recorded in seven guinea pig papillary muscles in a tissue bath by a double-barrel microelectrode with one barrel in and the other jus...

journal_title：Journal of cardiovascular electrophysiology

authors： Zhou X,Rollins DL,Smith WM,Ideker RE

更新日期：1995-04-01 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

authors： Miller RE,Wilkoff BL

更新日期：1995-02-01 00:00:00

abstract：:Pacer-Cardioverter-Defibrillator. This article reviews the function of the pacer-cardioverter-defibrillator (PCD). Detection of ventricular arrhythmias occurs in two programmable zones, with onset and stability modifiers available to diminish overdetection of sinus tachycardia and atrial fibrillation, respectively. Th...

journal_title：Journal of cardiovascular electrophysiology

authors： Friedman PA,Stanton MS

更新日期：1995-01-01 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

authors： Vainer J,Cheriex EC,van der Steld B,Dassen WR,Smeets JL,Wellens HJ

更新日期：1994-12-01 00:00:00

abstract：INTRODUCTION:The relationships between heart rate (HR) and HR variability (HRV) are not simple. Because both depend on the autonomic nervous system (ANS), they are not independent variables. Technically, the quantification of HRV is influenced by the duration of the cardiac cycles. The complexity of these relationships...

journal_title：Journal of cardiovascular electrophysiology

authors： Coumel P,Maison-Blanche P,Catuli D

更新日期：1994-11-01 00:00:00

abstract：INTRODUCTION:A male patient with an atriofascicular pathway underwent catheter ablation of the atriofascicular pathway during atrial fibrillation. METHODS AND RESULTS:The patient had preexcited atrial fibrillation both clinically and repeatedly during electrophysiologic study. A preexcited tachycardia with a 1:1 AV re...

journal_title：Journal of cardiovascular electrophysiology

authors： Miller JM,Harper GR,Rothman SA,Hsia HH

更新日期：1994-10-01 00:00:00

abstract：:QT dispersion is defined as the difference in QT interval between the different leads of the surface 12-lead ECG. This may provide an indirect measure of the underlying inhomogeneity of myocardial repolarization, which is believed to be important in arrhythmogenesis. Methodology for determining QT dispersion varies si...

journal_title：Journal of cardiovascular electrophysiology

authors： Statters DJ,Malik M,Ward DE,Camm AJ

更新日期：1994-08-01 00:00:00

abstract：INTRODUCTION:A neural network classifier has been designed, which is able to distinguish atrial fibrillation (AF) from other supraventricular arrhythmias in ambulatory (Holter) ECGs. METHOD AND RESULTS:The classification algorithm uses a rhythm analysis that considers the ECG to be a time series of RR interval duratio...

journal_title：Journal of cardiovascular electrophysiology

authors： Cubanski D,Cyganski D,Antman EM,Feldman CL

更新日期：1994-07-01 00:00:00

abstract：:The use of multiple His bundle-right bundle branch recordings in electrophysiologic studies has facilitated definition of the mechanism and elucidation of the direction of impulse propagation in bundle branch reentrant tachycardia, "Mahaim" fiber reciprocating tachycardia, and retrograde His depolarization in fascicul...

journal_title：Journal of cardiovascular electrophysiology

authors： Tai YT,Lee KL

更新日期：1994-04-01 00:00:00

abstract：INTRODUCTION:One of the fundamental electrophysiologic problems that has not yet been completely elucidated is the response of cardiac tissue to externally applied electric currents. A limited number of theoretical and experimental techniques has been used to study the electric behavior of cardiac tissue in the presenc...

journal_title：Journal of cardiovascular electrophysiology

authors： Sepulveda NG,Wikswo JP Jr

更新日期：1994-03-01 00:00:00

abstract：INTRODUCTION:Biphasic waveform defibrillation is not always more efficacious than monophasic waveform defibrillation. METHODS AND RESULTS:Waveform efficacy appears to vary with the lead system used. In this prospective, randomized study, defibrillation efficacy with biphasic and monophasic single capacitor 120-microF,...

journal_title：Journal of cardiovascular electrophysiology

authors： Marks ML,Johnson G,Hofer BO,Bardy GH

更新日期：1994-02-01 00:00:00

abstract：INTRODUCTION:The primary goal of the present study was to test whether selective pharmacologic blockade of alpha 1 receptors, and specifically of the subtype alpha 1a, could prevent ventricular fibrillation (VF) during acute myocardial ischemia. BACKGROUND:The development of new autonomic interventions is of clinical ...

journal_title：Journal of cardiovascular electrophysiology

authors： Vanoli E,Hull SS Jr,Foreman RD,Ferrari A,Schwartz PJ

更新日期：1994-01-01 00:00:00

abstract：:Electrical instability of the heart has numerous congenital origins. This review approaches the problems from a morphological standpoint, utilizing selected examples from my own studies of the human cardiac conduction system performed during the last three decades. Subjects discussed include multifocal Purkinje cell t...

journal_title：Journal of cardiovascular electrophysiology

authors： James TN

更新日期：1993-12-01 00:00:00

abstract：INTRODUCTION:The degree of organization in ventricular fibrillation (VF) is not known. As an objective measurement of spatial order, spatial correlation functions and their characteristic lengths were estimated from epicardial electrograms of pigs in VF. METHODS AND RESULTS:VF was induced by premature stimulation in f...

journal_title：Journal of cardiovascular electrophysiology

authors： Bayly PV,Johnson EE,Wolf PD,Greenside HS,Smith WM,Ideker RE

更新日期：1993-10-01 00:00:00

abstract：INTRODUCTION:Significant species-, tissue-, and age-dependent differences have been described for the L-type calcium current (ICa). Therefore, extrapolation of data obtained from the many animal models to human cardiac physiology is difficult. In this study, we have characterized the voltage-dependent properties of ICa...

journal_title：Journal of cardiovascular electrophysiology

authors： Cohen NM,Lederer WJ

更新日期：1993-08-01 00:00:00

abstract：:A 40-year-old man undergoing electrophysiologic study for recurrent palpitations was found to have a right bundle branch block during sinus rhythm and right bundle potentials occurring after ventricular activation. The sequence of activation of the proximal and distal right bundle potentials was suggestive of a retrog...

journal_title：Journal of cardiovascular electrophysiology

authors： Jazayeri MR,Deshpande SS,Sra JS,Akhtar M

更新日期：1993-06-01 00:00:00

abstract：:Vagus nerve activity can change heart rate substantially within one cardiac cycle, and the chronotropic effects decay almost completely within one cardiac cycle after cessation of vagal activity. The ability of the vagus nerves to regulate heart rate beat by beat can be explained in large part by the speed at which th...

journal_title：Journal of cardiovascular electrophysiology

authors： Levy MN,Yang T,Wallick DW

更新日期：1993-04-01 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

authors： Patterson E,Scherlag BJ,Lazzara R

更新日期：1993-02-01 00:00:00