[Function of the heart conduction system in Wolff-Parkinson-White syndrome]

A study of the functional state of the heart conduction system by means of electrophysiologic testing of 46 patients with the Wolff-Parkinson-White syndrome has shown that the peculiarities of atrioventricular conduction and the development of an electrocardiographic picture in this disease are determined by the functions of anomalous accessory atrioventricular pathways--more frequently of the Kent's bundle and more infrequently of the Macheim's bundle. In addition, the degree of manifestations of the ventricular pre-excitation on the ECG depends on the correlation between impulse conduction times along the anomalous and normal pathways. The slow conduction along the Kent bundle form the basis of the latent WPW syndrome not recorded by the ECG.