Stephen Denker
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View article: Electrophysiological determinants of antidromic reentry induced during atrial extrastimulation. Insights from a pacing model of Wolff-Parkinson-White syndrome.
Electrophysiological determinants of antidromic reentry induced during atrial extrastimulation. Insights from a pacing model of Wolff-Parkinson-White syndrome. Open
The electrophysiology of antidromic reentry, a less common phenomenon than orthodromic reentry, remains a poorly understood aspect of the Wolff-Parkinson-White (WPW) syndrome. We used a pacing model of ventricular preexcitation in patients…
View article: Electrophysiologic characteristics of sudden QRS axis deviation during orthodromic tachycardia. Role of functional fascicular block in localization of accessory pathway.
Electrophysiologic characteristics of sudden QRS axis deviation during orthodromic tachycardia. Role of functional fascicular block in localization of accessory pathway. Open
We analyzed the effect of functional fascicular block (FFB) on ventriculoatrial conduction time (VACT) during orthodromic tachycardia (OT) in 32 patients with single accessory pathway (AP) of the Kent bundle type. The location of AP was le…
View article: Transcatheter electrical ablation of right bundle branch. A method of treating macroreentrant ventricular tachycardia attributed to bundle branch reentry.
Transcatheter electrical ablation of right bundle branch. A method of treating macroreentrant ventricular tachycardia attributed to bundle branch reentry. Open
The present study describes the clinical and electrophysiological characteristics of sustained bundle branch reentrant ventricular tachycardia treated with electrical ablation of the right bundle branch. Seven patients presented with synco…
View article: Modulation of conduction and refractoriness in atrioventricular junctional reentrant circuit. Effect on reentry initiated by atrial extrastimulus.
Modulation of conduction and refractoriness in atrioventricular junctional reentrant circuit. Effect on reentry initiated by atrial extrastimulus. Open
The importance of activation sequence of an atrioventricular junctional reentrant (AVJRe) circuit, before delivery of an extrastimulus, has received little attention in studies concerned with clinical tachycardias. In this study a change i…
View article: Effect of sudden rate acceleration on the human His-Purkinje system: adaptation of refractoriness in a dampened oscillatory pattern.
Effect of sudden rate acceleration on the human His-Purkinje system: adaptation of refractoriness in a dampened oscillatory pattern. Open
Although the refractoriness of the human His-Purkinje system (HPS) during constant-cycle length pacing appears to be closely related to the cycle length of the stimulation, the mode of adaptation of this refractoriness with sudden rate acc…
View article: Electrophysiologic mechanisms of functional bundle branch block at onset of induced orthodromic tachycardia in the Wolff-Parkinson-White syndrome. Role of stimulation method.
Electrophysiologic mechanisms of functional bundle branch block at onset of induced orthodromic tachycardia in the Wolff-Parkinson-White syndrome. Role of stimulation method. Open
The mechanisms of aberrant conduction at the onset of induced orthodromic tachycardia in the Wolff-Parkinson-White syndrome were analyzed in 20 consecutive patients in whom this tachycardia was initiated by the atrial (A2) and/or right ven…
View article: Effects of alternating cycle lengths on refractoriness of the His-Purkinje system.
Effects of alternating cycle lengths on refractoriness of the His-Purkinje system. Open
The effects of alternating cycle lengths (bigeminal rhythm) on His-Purkinje system refractoriness were studied in 14 patients using His bundle and right bundle recordings. Programmed atrial stimulation at constant cycle length (method I) w…
View article: Postextrasystolic alterations in refractoriness of the His-Purkinje system and ventricular myocardium in man.
Postextrasystolic alterations in refractoriness of the His-Purkinje system and ventricular myocardium in man. Open
The changes in refractoriness of the His-Purkinje system (HPS) and ventricular myocardium (VM) that are associated with the occurrence of postextrasystolic beats in man are unknown. Accordingly, using a pacing model of the cycle length cha…
View article: Facilitation of macroreentry within the His-Purkinje system with abrupt changes in cycle length.
Facilitation of macroreentry within the His-Purkinje system with abrupt changes in cycle length. Open
We have recently described the ability of abrupt short-to-long changes in atrial cycle length (CL) to prolong refractoriness of the His-Purkinje system (HPS) and increase the likelihood of aberrant ventricular conduction. We have also show…
View article: Divergence between refractoriness of His-Purkinje system and ventricular muscle with abrupt changes in cycle length.
Divergence between refractoriness of His-Purkinje system and ventricular muscle with abrupt changes in cycle length. Open
The concept that refractoriness of the His-Purkinje system (HPS) and ventricular muscle both vary directly with cycle length is based on observations during the use of constant cycle length. During abrupt changes in ventricular cycle lengt…
View article: Effects of abrupt changes in cycle length on refractoriness of the His-Purkinje system in man.
Effects of abrupt changes in cycle length on refractoriness of the His-Purkinje system in man. Open
Abrupt changes in cycle length (CL) occur frequently in the clinical setting of atrial fibrillation. However, the effects of such changes on the His-Purkinje system (HPS) have not previously been considered during aberrant ventricular cond…