منابع مشابه
Concealed conduction.
THE CONCEPT of concealed conduction was introduced into electrocardiography to explain a lengthening of, or change in, the refractory period of the atrioventricular conduction system caused either by atrial activity that fails to propagate to the ventricles or by ventricular activity that fails to reach the atria. Standard electrocardiograms do not provide a direct demonstration of the partial ...
متن کاملConcealed Conduction
Concealed conduction is a phenomenon which could be rarely seen on the surface of electrocardiography (ECG). The surface ECG must be evaluated carefully for determination of concealed conduction. Because concealed conduction manifests itself in different shape and level. This evaluation could prevent misdiagnosis and unappropriate treatment. In this chapter we want to contribute to understandin...
متن کاملManifest and Concealed Reentry
The mechanism of the AV nodal Wenckebach phenomenon was studied in 25 dogs by multiple atrial and His bundle electrogram (HBE) recordings. During ventricular stimulation with 1:1 retrograde conduction, the interval from the stimulus artifact to the retrograde His deflection (S-H interval) remained constant. Decreasing the cycle length of stimulation (CLS) resulted in retrograde AV nodal Wenckeb...
متن کاملConcealed ventricular extrasystoles.
AN apparently haphazard distribution of ventricular extrasystoles may not be so haphazard as it appears and indeed may mask an underlying regularity. We previously reported a case in which careful analysis uncovered a simple but remarkable phenomenon, namely, that the interectopic intervals always contained an odd number of sinus beats.1 This was explicable on the assumption that a bigeminal rh...
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ژورنال
عنوان ژورنال: The Lancet
سال: 1861
ISSN: 0140-6736
DOI: 10.1016/s0140-6736(02)44826-x