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ID 17398
Eprint ID
17398
フルテキストURL
Thumnail 87_359.pdf 1.33 MB
タイトル(別表記)
Left Ventricular Hypertrophy and Left Axis Deviation in Ecg. (Study on Vectorcardiograms Recorded with Frank's system)
著者
前島 邦子 岡山大学医学部第一内科教室
斉藤 大治 岡山大学医学部第一内科教室
藤田 興 岡山大学医学部第一内科教室
久松 三生 岡山大学医学部第一内科教室
原岡 昭一 岡山大学医学部附属病院中央検査部
抄録
It is usually considered that isolated left ventricular hypertrophy is not responsible for marked left axis deviation, and it is associated with left anterior fascicular block. From this point of view, morphological features were studied on the vectorcardiograms recorded with the Frank's system in 63 cases. They had diseases producing systolic overload on left ventricle (mainly essential hypertension) revealed out left ventricular hypertrophy in Ecg findings. They were divided into three groups based on electrical QRS axis as follows: (ⅰ) NAD group consisted with +90°~0°. (ⅱ) LAD' group consisted with 0°~-30°. (ⅲ) LAD group consisted with -30°~-90°. The patterns of QRS Loop classified into 5 types in horizontal plane (N(Ⅰ, Ⅱ), L(Ⅰ-Ⅲ)) and 4 types in frontal plane (A~D). In horizontal plane, 75% of NAD group showed type N(Ⅰ), or N(Ⅱ), and type L(Ⅰ), or L(Ⅱ) occupied in 75% of LAD group. In frontal plane, a half of LAD belonged to type D and type A was less than 10% in LAD, compared that type A was observed in 85% of NAD. Left ventriular hypertrophy with marked left axis deviation was classified into three types on the base of QRS loop as follows: the terminal portion of QRS loop directed superiorly to the left (type B) and superiorly to the right (type C), and the majority of QRS loop located to leftward and superiorly (type D). It was considered that the electrical force caused by hypertrophied left ventricle directed more posteriorly and to the left in type B, and type D was the pattern added to type B with the delayed excitation in antero-lateral wall of left ventricle caused by left anterior fascicular block. On the other hand, it was considered that the majority of type C, showing type N(Ⅱ), was the resultant of the delayed excitation in postern-basal portion of ventricles and was not closely related with left ventricular hypertrophy or left anterior fascicular block.
発行日
1975-06-30
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
87巻
5-6号
出版者
岡山医学会
出版者(別表記)
Okayama Medical Association
開始ページ
359
終了ページ
372
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/joma1947/87/5-6/87_5-6_359/_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