岡山医学会雑誌
Online ISSN : 1882-4528
Print ISSN : 0030-1558
岡山県の三地区(作東町,山陽町,長船町)の循環器疫学調査(1966～1976)
第4報 加齢の心電図に与える影響(とくにMinnesota Code 1-0について)
原岡 昭一, 斉藤 大治, 上田 稔, 荻野 泰洋, 楠原 俊一, 吉田 英紀, 川崎 智子, 宮阪 実, 吉岡 信彦, 生長 豊健, 草地 省藏, 十河 泰司, 山田 信行, 西山 修, 安原 耕一郎, 久松 三生, 庵谷 和夫, 額田 要, 今田 格郎, 平田 孝子, 嘉数 佳子
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キーワード: 循環器疫学調査, 加齢, 10年間の追跡調査
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1979 年 91 巻 11-12 号 p. 1527-1535

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A survey of the ECG changes in 1906 cases in three districts of Okayama Prefecture was conducted over the past 10 years with particular emphasis on those exhibiting Minnesota Code 1-0.
1) Of the 741 cases which were ECG Code 1-0 in 1966, 77.1% remained Code 1-0 in 1970 and 57.2% in 1976.
2) Many cases which were initially ECG Code 1-0 in 1966 but with concomitant high blood pressure had changed to Code 3, Code 3+4+5, or Code 3+5 during the next 10 years.
3) Females constituted most of the Code 4+5 and Code 5 patients.
4) Those with Code 1-0 in 1966 and normal blood pressure, urinalysis and other physiological parameters dropped to 84.9% in 1976.
5) In those cases which remained Code 1-0 for 10 years, no significant changes were noted in the QT-interval, PR-interval, QRS-complex, or the size of the T-wave of their ECGs.
6) Among the 66 cases which were initially ECG Code 3 (only 1 subcode) in 1966, some had progressed to Code 3+4+5 or Code 3+5 and some had returned to Code 1-0 by 10 years later.
It was concluded that aging has very little effect on the ECG. Other factors appear to be more important in causing ECG changes.

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