- 期刊
新生兒超音波心圖的研究
Echocardiography in Normal Newborns
摘要
以超音波心圖檢查本院245名新生兒，其中低體重組(1,400至2,450公克)計33名，足月兒組(2,500至4,200 公克)計212名。測定兩組超音波心圖的下列數值，包括：二，三尖瓣的振幅及舒張期速率；左心室的舒張期及心縮期內徑，右心室舒張期內徑；左心房內徑；主動脈內徑：左，右兩心室壁及心室中隔的厚度和左心室壁的振幅。約98%的新生兒均可檢查出肺動脈瓣。本研究建立了正常新生兒超音波心圖的各數值，藉此標準對新生兒先天性心臟病的診斷有很大的幫助。此外，本文亦觀察到出生後3天內的嬰兒隨著出生後時間的增加，右心室噴射前期逐漸縮短，噴射期逐漸延長，噴射前期與噴射期的比值逐漸減低，此與肺動脈壓下降情形吻合一致。
關鍵字
無資料並列摘要
Echocardiograms were obtained from 245 newborn infants ranging from 1,400 to 4,200 gm in weight, utilizing a continuous recording technique with a 5 MHz transducer. Criteria of normal echocardiographic profiles were established in the low birth weight and full term neonates. This profile consists of quantitative measurement of the mitral and tricuspid valve excursion and velocity, the left ventricle systolic and diastolic internal dimension, the right ventricle diastolic dimension, aortic root dimension, left atrial size, thickness of the right ventricular wall, interventricular septum and the left ventricular wall. The establishment of normal echocardiographic criteria for the newborn may be expected to significantly facilitate application of this noninvasive technique to infants born with congenital heart disease. In addition, our study demonstrated also that the right ventricular pre-ejection period (RPEP) shortened, the right ventricular ejection time (RVET) lenghtened, and the RPEP/RVET ratio decreased along with the increase in age. These alternations reflected the decrease of the pulmonary vascular resistance during the early neonatal period.