Abstract
Korotkoff sounds on the young people recorded by an electro-cardiophonograph were newly classified into five phases according to the wave form.After this new classification, we established five grades from first to fifth in 326 cases, and found that the younger people had higher value than older.Therefore we used these grades as a sclerotic classification.As minimum blood pressure increased, the grade decreassd, and in cases of over 80mm Hg they showed progressive stiffening situation, while the maxium blood pressure had not so intimate relation with the sclerotic grade. Even if the maxium pressure was very high, that grade was not always so malignant. Pulse pressure had nothing to do with it. Mean pressure had most remarkable mutual relation with sclerose and in cases under 100mm Hg, they showed very good values.
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