拡大心電図の研究 : 拡大心電図と普通心電図とについての諸成分,分析値の比較
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Since Einthoven, all electrocardiogram have been taken with a standardization of one millivolt per I cm and it has often been observed that this standardization was not enough to survey the low voltage deflections. There have been only a few studies with amplified writing of electrocardiogram, in recent years, and because of this the present work has been undertaken. A few year ago, the author studied "High Amplitude Electrocardiography" of five fold standardization by a biophysical preamplifier. But, some differences between the author's high amplitude electrocardiogram and the usual electrocardiogram had not been made clear as yet. In this investigation, the author tried to compare a measured value of the usual electrocardiogram with that of the high amplitude electrocardiogram which was taken synchronously. Materials and Method: Materials are 203 cases which contain hypertension, arteriosclerosis, heart disease and hepatic disease. The employed electrocardiograph was Polycorder M-51 (Hayakawa Electric Co., Ltd.). The usual electrocardiograph was taken on an electrocardiographic preamplifier with a standardization of one millivolt per I cm, and the high amplitude electrocardiograph was taken on a biophysical preamplifier with a standardization of one milivolt per 5 cm, i.e. five-fold enlargement. The electrocardiogram was taken with a high cut filter of 30 cycle/sec to prevent the intervention of an electrocardiogram. Both ,the high amplitude electrocardiogram and the usual one were taken on an electrooscillograph with a paper speed of 60 mm per second and a scale of 1/100 second. Measurement of the various waves of the electrocardiogram were generally taken by using the standard lead II. When ST depression occurred the standard limb leads or lead V_5 Was used. A preliminary survey showed that the U wave tended to be broadest and tallest in chest leads and therefore these were used for detailed study. Generally, a survey of each deflection was done by the routine twelve lead.
- 社団法人日本循環器学会の論文
- 1969-06-20
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