[Anatomical viewpoint and physiopathological aspects of Wolff-Parkinson-White syndrome]

Reviewing various histological and physiopathological conditions pertinent to the WPW syndrome, attention is focused on the particular position of the HIS bundle, which is entrapped in different densities of connective tissue and in a turning point of the a.-v. conduction. In particular it may be stretched between one fixed limit at its Tawara extremity and its opposite limit which is relied upon the atrial contraction just in the ventricular presystole. This mechanical moment, together with a pathological trigger point in the HIS bundle, could assume the abnormal function of a timing factor of a.-v. conduction as well of the intraventricular one. In a summary manner two diagrams make effort to give likeness of this pathological viewpoint to an observer who is rather sceptical about the histological genuiness of many accessory bundles.