Mass health examination has been performed on adult rural inhabitants in local communities in Gunma prefecture. Below are given findings on elevation of blood pressure and fall of pulmonary function with advancing age and relation between these two, which were obtained from results of examination performed since 1969 with 2, 111 males and 2, 789 females, aged 30-79.
1) After the middle-age, forced vital capacity (FVC) and one second forced expiratory volume (FEV_1.0) decreased continusly and lineally.
2) Systolic blood pressure (S-BP), continuously rose as late as 70 years of age, where as diastolic blood pressure (D-BP), after attaining the peak at 60 years for the males and 55 years for females, tended to fall.
3) The age had significant moderate correlation with FVC and FEV_1.0. Also S-BP had significant moderate correlation with these tow, but D-BP was correlated with them at lower degree, though significant.
4) As for change with age in coefficient of variation, FVC and FEV_1.0 increased with ageing, and the findings may suggested that individual variation between the old-aged might be greater. Such a tendency was not conspicuous with blood pressure, either systolic or diastolic.
5) There was significant relation between blood pressure and pulmonary function in the thirties and forties. Such relation was not revealed in the later age.
6) This difference by age group may be produced partly because, in younger age, the hypertensive would be eliminated but not so much those with pulmonary dysfunction. As the result, The relation between the values of the two items would become inconspicuous with ageing.
7) There was not any general relation between ECG abnormalcy and low FVC. But those with deviation in ST and T tended to show low FVC. But because of a small number of cases, it is not certain whether this can be regarded as characteristic of ischemic heart diseases.
8) From the above findings it is difficult to find a statistically significant relation for the elderly between FVC and FEV_1.0 on one hand and results of cardio-vascular examination on the other. This means that it is impossible to estimate one side from the other, and that it has significance to examine the pulmonary function independently from the other.

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Using the sciatic nerve removed from a bullfrog and the electric nerve model (ENM), the experimental equivalent circuit of the nerve fiber, responses to stimulation of AC (1001×10⁴ Hz) were observed recording action potential or potential change generated by AC, which was applied in various number of the cycles initiating with different phase angle. The results obtained were the following.
1. The optimum frequency (frequency of the smallest threshold) was found on ENM as well as on the nerve, and it was identical (180 Hz) both on the nerve and ENM.
2. By application of single or several cycles of AC of lower frequency and for several msec of AC of higher frequency initiating with depolarizing or hyperpolarizing phase, AP's or potential changes elicited were different in their size and time course.
3. Obtained result on ENM in each case descrebed above was identical in the corresponding case on the nerve and E N M.
4. Hyperpolarizing phase of AC shortened or disappeared the relative refractory period, which followed to the excitation elicted by the preceeding depolarizing phase, and in some cases after the hyperpolarizing phase so called anodic break excitation occurred both in the nerve and ENM.
From these results, it was confirmed that ENM was essentially an equivalent circuit of the nerve fiber and would be regarded as a basic physical system of electrical activity in the nerve.

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An epidemic of the upper respiratory infection diseases was observed among primary schoolchildren and junior high schoolboys in Gunma Prefecture from April to July in 1973. To explore the nature of the epidemic, virological and serological examination were carried out with the materials derived from sample patients. The results is sammerized as follow :
1. Influenza virus was isolated from 31 cases out of 81 materials (throat swabs). All of the isolated strains was indicated Influenza virus type B.
2. A fourhold or greater rise to the titer of hemagglutination inhibiting antiboby against new influenza virus type B was recognized in 32 cases out of 56 paired sera obtained from the patients.
3. All of the isolated strains was found a new influenza viruses which had been varied a significant antigenic composition than to any of the former strains.
4. The study of the distribution in the population of general healthy inhabitants in Gunma Prefecture of antibody detected by the H I-test before the epidemic was found an increase in number of positive titres in age of group 31-40.

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On May 28, 1970, soon after one of the authors (S. A.) began to work in the division of surgery of the Maebashi Red Cross Hospital, the first blood dialysis was performed there on a patient with postoperative acute renal failure, who suffered hepatic and renal rupture in traffic accident.
In october 1972, the hospital was appointed to the blood dialysis center of Gunma prefecture, and from then up to the end of year 1974, the dialysis was performed 2, 200 times in total, on 7 cases of acute and 38 cases of chronic renal failure.
The author reviewed the hisory of the development from about 95 of artificial kidney both from instrumental and technical viewpoint in Japan, and attempted various discussions on the basis of our cases of acute renal failure.
Examination of relaticn between pre-dialysis laboratory findings and prognosis revealed the following conditions as the indicaticn for the performance of the dialysis in case of chronic renal insufficiency : BUN, 50100 mg/dl ; serum creatinine 310 mg/dl ; creatnine clearance, less than 20ml/min, in case of oliguria and hypertension of obove 200 mmHg, the control is difficult.
It is necessary to chose adequate time for the dialysis with reference to the above mentioned.

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Using the questionnaire, translated from BMRC respiratory questionnaire, the current smoking number of cigarettes per day, status of inhalation, and year when they started to smoke were surveyed, and the relation among these three was studied.
The main concern of the present study was the accumulation of basic data for the discouraging early smoking habit. The results of the retrospective investigations on rural inhabitants are as follows : 1) The significantly high rate of heavy smokers (smoking 20 or more, and 30 or more cigarettes per day) was observed in group of early started smokers (started befor 19 of age). 2) Significantly high rate of deep inhalation was noted among the group of early started smokers and of higher amounts smokers, though the rate was relatively low in the group of others.
These findings strongly suggest that early smoking habit may lead the persons to heavy smoking in older age. Since, however, the smoking behavior may differ by age group, cohort studies are claimed to obtain more detailed findings.

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Since the first repont of BH block by Narula and Samet in 1970, the attention has been drawn to this special type of atrioventricular block, and now it is generally accepted that this is not a very uncommon abnormality.
The present paper contains a report of 4 cases of BH block diagnosed by His bundle recording. Three cases were diagnosed as complete atrioventricular block resulting from split BH (H, H'), whereas the remaining 1 was diagnosed as first degree BH block (abnormal duration of BH with split BH). The usefulness of His bundle recording in atrioventricular block was stressed.

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