Journal of Okayama Medical Association
Published by Okayama Medical Association

Full-text articles are available 3 years after publication.

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)

Haraoka, Shoichi
Saito, Daiji
Ueda, Minoru
Ogino, Yasuhiro
Kusuhara, Shunichi
Yoshida, Hidenori
Kawasaki, Tomoko
Miyasaka, Minoru
Yoshioka, Nobuhiko
Ikenaga, Toyotake
Sogo, Taiji
Yamada, Nobuyuki
Nishiyama, Osamu
Yasuhara, Koichiro
Hisamatsu, Mitsuo
Ioriya, Kazuo
Nukada, Kaname
Imada, Kakuro
Hirata, Takako
Kasu, Yoshiko
91_1527.pdf 451 KB
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.
Minnesota Code 1-0