Key result
Electrocardiogram analysis of 100 patients with atrial arrhythmias suggests the atrioventricular node functions physiologically with 3 levels of sequential block.
Observational (n=100)
Analysis of ECGs during atrial arrhythmias suggests the AV node functions with 3 levels of sequential block during alternating Wenckebach phenomenon.
The electrocardiograms of 100 patients with rapid and regular PP intervals during atrial arrhythmias (because of atrial tachycardia or flutter, or pacing) were examined for periods of irregular atrioventricular conduction. This irregular conduction corresponds to an alternating Wenckebach phenomenon, of a type that can be determined from simple rules. The different types of conduction encountered in different patients and the changes seen in the same patient suggest that the atrioventricular node functions physiologically with 3 levels of sequential block. The different prevalence of the 2 types of alternating Wenckebach block may reflect functional differences at the level of the atrioventricular node.
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Slama et al. (1979) conducted an observational in Atrial arrhythmias (atrial tachycardia, flutter, or pacing) (n=100). Atrial arrhythmias (atrial tachycardia, flutter, or pacing) was evaluated on Periods of irregular atrioventricular conduction (alternating Wenckebach phenomenon). Electrocardiogram analysis of 100 patients with atrial arrhythmias suggests the atrioventricular node functions physiologically with 3 levels of sequential block.
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