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ファイル
言語
英語
著者
斎藤 正一
羽根田 紀幸
楫野 恭久
森 忠三
馬場 清
光藤 和代
田中 陸男
内容記述(抄録等)
We performed echocardiography on neonates sequentially and investigated the changes in hemodynamics during the neonatal period. Twenty newborn infants (male : ten, female : ten, gestational age : 34-41 weeks, birth weight : 1540-4100g) were examined. The first examination was performed within one day after birth, and the second examination two to six days thereafter. Six indices of hemodynamics were analyzed on both sides of the heart; the ratio of pre-ejection period to the ejection time (LPEP/LVET, RPEP/RVET), end diastolic ventricular dimension (LVDd, RVDd), and shortening fraction of ventricular dimension (SFLVD, SFRVD). Gestational age or heart rate did not affect these indices, while birth weight closely correlated with LVDd and RVDd (r=0.44 and 0.66,respec-tively). The mean±standard deviation of the indices at the first and the second examinations were : cardiac cycle : 0.48±0.06 sec and 0.47±0.08 sec, LPEP/LVET : 0.34±0.07 and 0.28±0.06,RPEP/RVET : 0.41±0.11 and 0.27±0.06,LVDd : 1.76±0.20cm and 1.79±0.21cm, RVDd : 1.50±0.20cm and 1.61±0.22cm, SFLVD : 0.32±0.06 and 0.35±0.06,SFRVD : 0.26±0.08 and 0.29±0.07. In the series of examinations, LPEP/LVET and RPEP/RVET decreased and LVDd and RVDd increased, suggesting that the reduction in the after-load on both ventricles, the improvement of left ventricular contractility, and the increase in the preload of the ventricles may take place during the first week after birth.
主題
hemodynamics
neonates
echocardiography
掲載誌名
Shimane journal of medical science
5
2
開始ページ
167
終了ページ
174
ISSN
03865959
ISSN(Online)
24332410
発行日
1981-12-01
NCID
AA00841586
出版者別表記
Shimane Medical University
資料タイプ
紀要論文
ファイル形式
PDF
著者版/出版社版
出版社版
部局
医学部
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