Measurement of the Interventricular Presssure Gradient in Patients with Ventricular Septal Defect—A Simultaneous Doppler and Dual Catheter Study
- VernacularTitle:多普勒超声心动图和双心导管同步测量室间隔缺损跨隔压差
- Author:
Yun ZHANG
- Publication Type:Journal Article
- Keywords:
Doppler echocardiography;
vetricular septal defect
- From:Chinese Journal of Ultrasonography
1993;0(03):-
- CountryChina
- Language:Chinese
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Abstract:
To assess the fesibility and reliability of Doppler echocardigraphy in measuring the interventricular pressure gradient in patients with ventricular septal defect (VSD), continuous—wave Doppler echocardiography and cardiac catheterization were performed simultaneously in 58 cases with VSD. The shunt velocities were recorded by Doppler and converted into the peak instantaneous pressure gradient (△P_(P-D)), the mean pressure gradient (△P_(m-D)) and the mid—systolic pressure gradient (△p_(ms-D)) using the simplified Bernoulli equation. Both left and right ventricular pressures were measured using a dual catheter technique and the peak instantaneous pressure gradient (△p_(p-c)) and the peak—to—peak pressure gradient (△P_(pp-c)) measured. The results showed that: 1. there was a high correlation between △P_(p-D) and △P_(p-c) (r=0.98), and there was no significant difference between the two measurements; 2. both △P_(p-D) and △P_(m-D) correlated highly with △P_(pp-c) (r=0.98 and r=0.96, respectively), but △P_(p-D) significantly ovestimated(P
