超声测量肺循环阻力和体循环阻力比值

Measurement of the Ratio of Pulmonary to Systemic Vascular Resistance by Echocardiography

探讨超声测量肺循环阻力和体循环阻力比值（ＰＶＲ／ＳＶＲ）的方法。超声测量４３例先天性心脏病患儿左、右室射血前期（ＬＰＥＰ，ＲＰＥＰ）、射血期（ＬＥＴ，ＲＥＴ）和加速期（ＬＡＴ，ＲＡＴ），同时测量主、肺动脉血流量（Ｑｓ，Ｑｐ）。进而计算ＲＰＥＰ：Ｑｐ、ＲＰＥＰ：ＥＴ：Ｑｐ、ＲＰＥＰ：ＡＴ：Ｑｐ、ＲＰＥＰ：Ｑｐ／ＬＰＥＰ：Ｑｓ、ＲＰＥＰ：ＥＴ：Ｑｐ／ＬＰＥＰ：ＥＴ：Ｑｓ和ＲＰＥＰ：ＡＴ：Ｑｐ／ＬＰＥＰ：ＡＴ：Ｑｓ。结果：超声测量ＲＰＥＰ：Ｑｐ、ＲＰＥＰ：ＥＴ：Ｑｐ和ＲＰＥＰ：ＡＴ：Ｑｐ与心导管测量的ＰＶＲ／ｍ２比较，ｒ分别为０．６６、０．６５和０．７５。超声测量ＲＰＥＰ：Ｑｐ／ＬＰＥＰ：Ｑｓ、ＲＰＥＰ：ＥＴ：Ｑｐ／ＬＰＥＰ：ＥＴ：Ｑｓ和ＰＲＥＰ：ＡＴ：Ｑｐ／ＬＰＥＰ：ＡＴ：Ｑｓ与心导管测量ＰＶＲ／ＳＶＲ比较，ｒ分别为０．７８、０．７８和０．８９。其中ＲＰＥＰ：ＡＴ：Ｑｐ／ＬＰＥＰ：ＡＴ：Ｑｓ与ＰＶＲ／ＳＶＲ相关最好。超声测量ＲＰＥＰ：ＡＴ：Ｑｐ／ＬＰＥＰ：ＡＴ：Ｑｓ能较准确地估测ＰＶＲ／ＳＶＲ。

To investigate the method of measuring the ratio of pulmonary to systemic vascular resisitance (PVR/SVR)by echocardiography. The preejection periodejection time and acceleration time of the left and right ventricules (LPEPLETLATRPEPRET and RAT) as well as the volume of pulmonary and systemic blood flow (Qp,Qs) were measured by echocardiogrphy in 43 cases of congenital heart disease. Then the RPEP:QpRPEP:ET:QpRPEP:AT:QpRPEP:Qp/LPEP:QsRPEP:ET:Qp/LPEP:ET:Qs and RPEP:AT:Qp/LPEP:AT:Qs were calculated. The LPEP:Qp RPEP:ET:Qp and RPEP:AT:Qp measured by echocardiography were compared respectively with PVR/m2 measured by cardiac catheterization. The correlation coefficients were 0.66, 0.65 and 0.75 respectively. The RPEP:Qp/LPEP:Qs RPEP:ET:Qp/LPEP:ET:Qs and RPEP:AT:Qp/LPEP:AT:Qs measured by echocardiography were compared respectively with PVR/SVR measured by cardiac catheterization. The correlation coefficients were 0.78, 0.78 and 0.89 respectively. The best correlation was between RPEP:AT:Qp/LPEP:AT:Qs and =PVR/SVR. The PVR/SVR can be accurately and extensively estimated by measuring the RPEP:AT:Qp/LPEP:AT:Qs by echocardiography.