Key result
Analysis of electrocardiograms from 375 healthy Japanese individuals established normal limits and variability for ECG components, enabling comparison across age, sex, and with American samples.
Cross-Sectional (n=375)
Establishes normal limits and variability for electrocardiographic parameters in a healthy Japanese population, providing a reference for diagnostic interpretation.
Supports Japanese-specific ECG reference values for interpretation; leaves open broader validation before routine adoption.
The purpose of this paper is to provide the frequency distribution and statistical data concerning most of the component parts of the electrocardiograms of the Japanese and to compare with each group separated by ages and sexes. In order to obtain the normal limits of the electrocardiograms of the Japanese, 375 individuals who were proved to be healthy through the thorough examinations more than two years, were selected as a sample representative of a healthy population. Normal range limits obtained from our material were compared with electrocardiographic criteria which are commonly used for diagnostic interpretation. Additionally, the racial comparison of the electrocardiographic samples of the Japanese with those of the Americans was made.
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Yoshiko Mizuno (1966) conducted a cross-sectional in Healthy (n=375). Electrocardiogram analysis vs. American samples was evaluated on Normal limits and variability of electrocardiographic items. Analysis of electrocardiograms from 375 healthy Japanese individuals established normal limits and variability for ECG components, enabling comparison across age, sex, and with American samples.
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