A cardiovascular epidemiologic survey in three different areas in Okayama prefecture (Sakuto-Cho, Sanyo-Cho and Osahune-Cho) during the period from 1966 to 1976

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  • HARAOKA Shoichi
    The First Department of Internal Medicine, Okayama University Medical School
  • SAITO Daiji
    The First Department of Internal Medicine, Okayama University Medical School
  • UEDA Minoru
    The First Department of Internal Medicine, Okayama University Medical School
  • OGINO Yasuhiro
    The First Department of Internal Medicine, Okayama University Medical School
  • KUSUHARA Shunichi
    The First Department of Internal Medicine, Okayama University Medical School
  • YOSHIDA Hidenori
    The First Department of Internal Medicine, Okayama University Medical School
  • KAWASAKI Tomoko
    The First Department of Internal Medicine, Okayama University Medical School
  • MIYASAKA Minoru
    The First Department of Internal Medicine, Okayama University Medical School
  • YOSHIOKA Nobuhiko
    The First Department of Internal Medicine, Okayama University Medical School
  • IKENAGA Toyotake
    The First Department of Internal Medicine, Okayama University Medical School
  • KUSACHI Shozo
    The First Department of Internal Medicine, Okayama University Medical School
  • SOGO Yasushi
    The First Department of Internal Medicine, Okayama University Medical School
  • YAMADA Nobuyuki
    The First Department of Internal Medicine, Okayama University Medical School
  • NISHIYAMA Osamu
    The First Department of Internal Medicine, Okayama University Medical School
  • YASUHARA Koichiro
    The First Department of Internal Medicine, Okayama University Medical School
  • HISAMATSU Mitsuo
    The First Department of Internal Medicine, Okayama University Medical School
  • NUKADA Kaname
    Department of Hygiene, Okayama Prefectural Office
  • IMADA Kakuro
    Department of Hygiene, Okayama Prefectural Office
  • HIRATA Takako
    Department of Hygiene, Okayama Prefectural Office
  • KASU Yoshiko
    Department of Hygiene, Okayama Prefectural Office

Bibliographic Information

Other Title
  • 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)
  • 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)-2-心電図所見に与える血圧の影響について
  • オカヤマケン ノ サンチク サクトウチョウ サンヨウチョウ オサフネチョウ ノ
  • 第2報 心電図所見に与える血圧の影響について
  • II. Effect of blood pressure on ECG

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Abstract

The relationship between blood pressure and ECG findings (Minnesota Code) were studied in 1906 subjects aged from 35 to 65 in 1966 in three districts of Okayama prefecture from 1966 to 1976.<br>Following results were obtained;<br>1. Comparison of the mean values of blood pressure (of 918 subjects, 307 male and 611 female) between the first half (1966-1970) and the second half (1971-1976) period showed that the blood pressure fell in the majority of patients with moderate or severe hypertension but elevated in 13-15% of subjects with mild hypertension (satisfying both the systolic blood pressure of 180 mmHg and the diastolic blood pressure 100 mmHg). Both improvement and aggravation in blood pressure were more frequent in male, while in female blood pressure level mostly remained unchanged.<br>Blood pressure in the plane district (Osahune-Cho) was the most favourable than that in other two districts.<br>2. Along with an elevation of blood pressure, Code 1-0 in ECG decreased and codes for left ventricular hypertrophy (combination of two or more subcategories of Code 3, or of Code 3 with Code 4 or 5) increased.<br>Code 1-0 decreased with aging, while prevalence rate of Code 4 or Code 5 was affected neither by aging nor by blood pressure.<br>3. The ECG code suggesting left ventricular hypertrophy closely related to systolic blood pressure.

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