Phenomenon of the Gap in Atrioventricular Conduction in the Human Heart
TLDR
The gap phenomenon was studied in eight human subjects, using a catheter technique for recording electrical activity of the His bundle, and could be abolished by decreasing the basic cycle length or by beta-receptor blockade, both of which prevented conduction block of A2 in the His-Purkinje system.Abstract:
Gap in atrioventricular conduction in humans by catheter technique for recording electrical activity of His bundleread more
Citations
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Journal ArticleDOI
Unusual Properties of Accessory Pathways
TL;DR: Electrophysiologic evaluation in five patients who exhibited manifestations of the pre-excitation syndrome and/or supraventricular tachycardia provided functional evidence that the properties of the accessory fibers may be quite variable, and anomalies in conduction over accessory pathways were demonstrated.
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Effects of procainamide and quinidine sulfate in the Wolff-Parkinson-White syndrome.
TL;DR: Because of the variabilit observed in drug response, patients with Wolff-Parkinson- White syndrome and a history of atrial fibrillation with a rapid ventricula response should have atrialfibrillation electively induced while on therapy with procainamide or quinidine.
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Electrophysiologic effects of atropine on atrioventricular conduction studied by his bundle electrogram
Masood Akhtar,Anthony N. Damato,Anthony R. Caracta,William P. Batsford,Mark E. Josephson,Sun H. Lau +5 more
TL;DR: The effect of atropine on the electrophysiologic properties of the A-V conducting system was important in interpreting the conversion of a type I gap in A-v conduction to a type II gap.
Journal ArticleDOI
Dual atrioventricular nodal pathways: a reappraisal.
TL;DR: It was not until 1956 when Moe et al. demonstrated evidence of dual atrioventricular (A-V) transmission system in the dog that this concept began to be formularized.
Journal ArticleDOI
The electrophysiological effects of intravenous magnesium on human sinus node, atrioventricular node, atrium, and ventricle.
H. S. Rasmussen,P. E. B. Thomsen +1 more
TL;DR: IV Mg has several electrophysiologic effects that may be beneficial in the treatment/prevention of supraventricular tachyarrhythmias and mean effective and functional atrial refractory periods increased.
References
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Journal ArticleDOI
Catheter Technique for Recording His Bundle Activity in Man
Benjamin J. Scherlag,Sun H. Lau,Richard H. Helfant,Walter D. Berkowitz,Emanuel Stein,Anthony N. Damato +5 more
TL;DR: The use of this recording technique in man will facilitate diagnostic interpretation of the electrocardiogram and can be used in various investigations of atrioventricular and intraventricular conduction in man.
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Patterns of Atrioventricular Conduction in the Human Heart
Andrew L. Wit,Melvin B. Weiss,Walter D. Berkowitz,Kenneth M. Rosen,Charles Steiner,Anthony N. Damato +5 more
TL;DR: The relevance of conduction delay and block in the different regions of the A-V conduction system to the full recovery time and the relative, functional, and effective refractory periods of A-v conduction are indicated.
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Aberrant A-V Impulse Propagation in the Dog Heart: A Study of Functional Bundle Branch Block
TL;DR: Excessive delay and configurational change of ventricular responses to atrial premature beats, previously attributed to dissociation within the A-V node, were shown to be due to functional block of the right bundle branch.
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Influence of cycle length upon refractory period of auricles, ventricles, and A-V node in the dog.
TL;DR: The functional refractory periods of auricular and ventricular muscle, and of the A-V transmission system were estimated in the denervated dog heart and it is postulated that the deviations may represent dissociation of the properties of two different elements in each of these tissues.
Journal ArticleDOI
Functional Properties of the Atrioventricular Conduction System
TL;DR: Results of experiments designed to study A-V transmission of premature atrial responses by recording electrical activity directly from selected parts of the conducting system show that the same phenomena probably occur in the intact, normal heart, and it seems unnecessary to postulate a dual A-v conducting system in the mammalian heart.