[The 100(th) anniversary of "The Conduction System of the Mammalian Heart" by Sunao Tawara].

In 1906, Sunao Tawara published "Das Reizleitungssystem des Säugetierherzens" ("The Conduction System of the Mammalian Heart"). We remind of the centennial of this publication, really a morphological study, as it is a milestone of cardiac electrophysiology, too. Tawara not only described for the first time all compartments of the atrioventricular conduction as a continuous system but also derived its function from the morphological pecularities. Later, this was confirmed by physiological experiments. The significance of Tawara's discovery can be seen from reactions to his monograph documented in the contemporary literature.