Sunao Tawara

Sunao Tawara (Island of Kyushu in Japan, born in 1873, died in 1952) is a Japanese physiologist, discoverer of the auriculo-ventricular Nœud with Ludwig Aschoff, structure located above the Faisceau of His and allowing the transmission of the impulse between the auricles and the ventricles cardiac.

The auriculo-ventricular node is thus called node of Aschoff-Tawara .

Biography

He studies medicine with Tokyo and joined in 1903 the institute of anatomi-pathology of Marburg directed by Ludwig Aschoff. There, by dissecting hearts, it individualizes a structure formed by gotten mixed up cells " as in a nœud" above the Beam of His, on the level of the floor of the right auricle. It publishes its discovery in 1906 in a work entitled the conductive system in the heart of the mammals . It in addition describes the division of this same beam in two branches, right-hand side and left, then out of fibers which it identifies like the structure described by Purkinje a few front decades. It from of deduced the function from conduction of the electric impulse by the whole of this system but supports the theory myogene which says that in fact modified muscular cells are responsible for this conduction (in opposition to the theory neurogene ).

It goes back to Japan in 1906 where he becomes professor of pathology to Kyushu. He dies in 1952 of a Démence.

Reference

'' Why Does the Happy Heart? The Discovery off the Electrical System off the Heart '', Mr. Silverman, D Grove, C Upshaw, Circulation. 2006; 113: 2775-2781

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