منابع مشابه
Wenckebach phenomenon within the atria.
rates ranged between I58 and I94 a minute. This phnomenon (also observed by Lewis, Feil, and Stroud, I918-I920) was manifested by a gradual prolongation of the stimulus-to-atrial electrogram intervals until one stimulus failed to reach the recording electrodes. The localization of the site ofdelay and block could be made exclusivelyfrom the intracardiac recordings, since the surface leads showe...
متن کاملThe Wenckebach phenomenon associated with sialorrhoea.
Case Report A 23-year-old African male labourer stated that for the previous two years he had been troubled by periods of excessive salivation. These periods varied from a few days to several weeks with symptom-free intervals of similar duration. This excessive salivation necessitated the frequent use of a handkerchief, and on awakening, his pillow was often wet. There were no other symptoms. H...
متن کاملThe Wenckebach phenomenon in sino-atrial block.
Disturbances in conduction analogous to those occurring at the atrio-ventricular (A-V) node may be present at the sino-atrial (S-A) junction. When second degree block occurs at the S-A junction, it may adopt the form of the Wenckebach phenomenon. Early descriptions of this arrhythmia were presented by Wenckebach (1906), Rihl (1908), and Wenckebach and Winterberg (1914). There have been relative...
متن کاملThe Wenckebach phenomenon and auricular-ventricular dissociation in children.
The Wenckebach type of heart block is characterized by a progressive lengthening of the P-R interval until A.V. conduction fails and a beat is dropped. This fornm of heart block was first described as a clinical entity by Wenckebach (1899) on the basis of radial arteriograms. Since then, this phenomenon has been seen in a variety of conditions including digitalis poisoning, rheumatic fever, ton...
متن کاملRole of positive feedback in the atrioventricular nodal Wenckebach phenomenon.
In the atrioventricular (AV) nodal Wenckebach phenomenon, there is a progressive increase in the P-R interval and a concomitant reduction in the R-P interval. Two series of experiments were conducted on anesthetized dogs to ascertain whether the changes in the P-R interval depended on the associated changes in the R-P interval. In one series of experiments, the atrium was paced at various basic...
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ژورنال
عنوان ژورنال: Heart
سال: 1972
ISSN: 1355-6037
DOI: 10.1136/hrt.34.11.1121