バリストカルジオグラフィーに関する臨床実験的研究

Clinico-experimental Studies on Ballistocardiography.

I．緒言

　心臓の搏動に伴う人体の動きを記録することにより，被験者になんら苦痛を与えずに，心・血管系の力学的機能をうかがい知りうるballistocar—diography（以下バリスト法と略す）は，非常に興味ある方法である。

　1939年，Starr^1）は、high-frequency tableballistocardiographを用いて，多くの臨床ならびに屍体実験を行い，心力に関係深い興味ある所見を発表した。以来，冠動脈疾患をはじめとする各種心・血管系疾患の循環機能を推定する手段として，バリスト法は，ますます発展しつつある。

Clinico-experimental Studies on Ballistocardiography by Yoichi Shimose, M. D.

Department of Internal_Medicine, School of Medicine, Keio University (Director : Prof. J. Ishida) Ida Hospital, Kawasaki City (Director of Hospital : Dr. S. Ugata)

Using the von wittern's type sublow-frequency table, studies have been made on the ballisto-cardiograms (B. C. G.) of 307 cases of admitted persons for physical check up and 106 cases with diabetes mellitus, with special reference to aging, elevation of blood pressure level, abnormal lipid metabolism, abnormal carbohydrate metabolism, obesity and, abnormal retinal findings.

The mean values of B.C.G. measurements in normal young subjects are presented.

The results of this study are as follows :

1. Abnormal B.C.G. pattern, deep K, low amplitude etc. increase with advancement of age, and particullary they are found most frequently in hypertensive subjects. B.C.G. reveals more sensitive indicis than B.C.G. in reflecting geriatric changes.

About blood pressure level, deep K is more closely related to diastolic than systolic blood pressure.

R-K interval decreases with advancement of age. Among same age groups, this interval sho rens with increase in blood pressure.

2. Cases with high total serum cholesterol level (230 mg/dl or over), even in non-hypertensive subjects, show high incidence of deep K, and there is also a tendency of increased incidence of low amplitude and tall H among these cases.

Diabetic patients show higher and earlier appearance of deep K, low amplitude and tall H than non-diabetic subjects. In diabetics, deep K, and low amplitude are more eminent than B. C. G. findings. Besides, among diabetics with abnormal lipid metabolism (serum cholesterol 230 mg/dl or over), there is a tendency of increased incidence of these abnormal B.C.G. findings.

In non hypertensive subjects, more marked evidence of these abnormal findings are found in the cases with abnormal lipid and/or carbohydrate metabolisms than in control cases.

3. In overweight non hypertensive subjects, deep K and low amplitude tend to appear more evidently than in normal and underweight subjects.

4. The incidence of deep K and low amplitude tends to increase with advancement of "grade" in Keith-Wagner's and Scheie's retinal classification.

The evidence reveales in this study lead the author to belive that B.C.G. is a useful method for the diagnosis of circulatory dysfunctions, especially coronary-sclerotic heart diseases and arter iosclerotic diseases. In particular, the author feels this method is very useful in detecting the cases with abnormal lipid metabolism or diabetics.