地域住民の心電図所見における加齢の影響

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  • The influence of aging on electrocardiographic findings in the population survey.
  • チイキ ジュウミン ノ シンデンズ ショケン ニ オケル カレイ ノ エイキョ

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Electrocardiograms of 479 subjects, who consisted of 226 males and 253 females, were recorded in the mass examination, . With aging heart rate decreased, RR interval was prolonged on ECG. PQ or QT intervals were also prolonged with aging. The QRS electrical axis tended to decrease after 20 years old. PQ intervals increased until 30 years old in males or until 20 years old in females, and then further increased gradually with aging. The same tendency of PQ interval was found, when heart rate was in the range of 55 to 75 beats per minute. There were significant positive correlations (r=0.582, r=0.638, r=0.632, respectively) found between aging and PQ, RR, or QT intervals in males, while significant positive ones (r=0.539, r=0.471, r=0.564, respectively) between them in females. Systolic or diastolic blood pressure levels were elevated with aging until 70 years old in both sexes. Sv1+RV5 increased in the voltage values until 9 years old in both sexes, then to decrease until 20 to 30 years old and again to increase until 79 years old. The left ventricular hypertrophy by the voltage criteria tended to increase with aging. The frequency of the horizontal depression of ST segment or the inversion of T wave tended to increase with aging.

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