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ID 40825
フルテキストURL
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タイトル(別表記)
Electrocardiographic Studies in Healthy Infants Part 1. Changes of the Electrocardiographic Time Findings with increase in Age
著者
熊野 敬一 岡山大学医学部小児科教室
抄録
18 Normal infants were chosen for this investigation. Their E. C. G. (Standard limb leads, Unipolar limb leads, Unipolar precordial leads) were followed up successively recorded for every lead. Electrocardiograms taken under the same conditions were analysed to study electrocardiographic changes with the growth of the infant. The following results were obtained: 1) R-R Interval, Heart Rate and Sinus Arrythomia. Decreasing Heart Rate was observed during period from 10 days to 2-3 weeks after birth and this condition discontinued at about 4 weeks of age. Maximum average Heart Rate was found at 2 month of age, followed by a decrease in Heart Rate as the age increased. Incidence of Sinus Arrythomia was 21, 6% and there was no change with the growth of the child. 2) Duration of P wave. Duration of P wave increased on every lead with the advancement of age. Only the duration of PIII wave showed no definite changes, which indicated indefinite variation in the same infant. 3) PQ Interval. At every lead PQ Interval increased with advancing age with a temporaly decrease of PQ (VI) and PQ (V5) Interval at the 2nd month. Direct co-operation was establiched between change of PQ(II) and of R-R Interval. The following formula was set up: PQ(II)=0.236 R-R+1.01±0.578 4) QRS Interval. QRS Interval became longer with each increasing month at every lead, and there was significant direct co relation between change of QRS and R-R Interval. The next formula was established: QRS(II)=0,0819 R-R+1, 70±0,597 5) QT Interval. QT Interval increased at every lead with each increasing month, and there was direct co-relation between change of QT(II) and of R-R Interval with growth. This co-relation was indicated by the next formula: QT(II)=0,1231 R-R+16,66±0,59 6) Venticular Activation Time. (V. A. T.) During the first 3 months V. A. T. (VI) was greater than V. A. T. (V5), both became equal at 4th month and then this relation was inverted. This change might be due to the rapid increase of left ventricular thickness.
発行日
1959-03-25
出版物タイトル
岡山医学会雑誌
出版物タイトル(別表記)
Journal of Okayama Medical Association
71巻
4-1号
出版者
岡山医学会
出版者(別表記)
Okayama Medical Association
開始ページ
1547
終了ページ
1561
ISSN
0030-1558
NCID
AN00032489
資料タイプ
学術雑誌論文
オフィシャル URL
https://www.jstage.jst.go.jp/article/joma1947/71/4-1/71_4-1_1547/_article/-char/ja/
関連URL
http://www.okayama-u.ac.jp/user/oma/
言語
Japanese
著作権者
岡山医学会
論文のバージョン
publisher
査読
有り
Eprints Journal Name
joma