Doppler velocity and flow through the aortic isthmus in normal term neonates

被引：1

作者：

Ithuralde, A ^{[1
]}

Riggs, T ^{[1
]}

Hussey, ME ^{[1
]}

Weinhouse, E ^{[1
]}

机构：

[1] William Beaumont Hosp, Royal Oak, MI 48073 USA

来源：

CARDIOLOGY | 1999年 / 91卷 / 03期

关键词：

aortic isthmus; Doppler echocardiography; continuity equation; bernoulli equation;

D O I：

10.1159/000006911

中图分类号：

R5 [内科学];

学科分类号：

1002 ; 100201 ;

摘要：

Our hypothesis was that the relationship between the internal aortic diameter and the Doppler flow velocity across the aortic isthmus could be modeled by applying the principle of conservation of mass flow. The aortic diameter decreased at the isthmus by a mean of 18% (t = 11.02, p < 0.0001), while the flow velocity increased by a mean of 44% (t = 10.09, p < 0.0001). The mean peak mass flow rate was 34.5 ml/s preisthmus and 32.9 ml/s at the isthmus with excellent correlation (r = 0.830). We conclude that the increase in Doppler velocity observed in the descending aorta can be explained by the normal narrowing observed at the aortic isthmus and application of the continuity equation for conservation of mass flow.

引用

页码：205 / 209

页数：5

共 11 条

[1] ARM AND LEG BLOOD PRESSURES - ARE THEY REALLY SO DIFFERENT IN NEWBORNS [J].