Early Presbyacusis and Blood Pressure

Abstract

In totally 1, 189 “Human Dock” patients mainly composed of 40-49 and 50-59-year-old male group, 402 normal hearing persons and 135 presbyacusis were found.
Then, blood pressure, serum cholesterol levels, retinal blood pressure and retinal angio-sclerois of presbyacusis group were compared with these of normal hearing group.
The results of these statistic observation are as follows.
1. Presbyacusis is related to both systolic and diastric blood pressure.
2. But, serum cholestrol levels are not related to presbyacusis.
3. Both retinal blood pressure and the degree of retinal angiosclerosis (Keith-Wagener) are apparentry related to presbyacusis.
4. Mean audiograms of hypertonic presbyacusis group aged 40-49, shows about 10-15dB more hearing loss at 4000Hz and 8000Hz than those of hypotonic group same aged, but these differences of both group aged 50-59, are more small.
5. Hypertension and angiosclerosis are sure to cause presbyacusis early and to progress it fast. But, the mutual relation of presbyacusis with hypertension and angio-sclerosis is remain unexplained in persons of more abvanced age.
6. It is unquestioable to be other pathogenic factors of presbyacusis than circulatory disorders in inner ear, environmental noise is seems to be one of important other factors.