心功能不全病人右胸导纳图变化与肺动脉嵌压间的相关关系及临床意义

Relationship and clinical significance between changes of right chest electrical admittance plethysmography and pulmonary capillary wedge pressure on patients with cardiac insufficiency

目的探讨心功能不全时右胸导纳图变化与肺动脉嵌压(PCWP)间的相关关系及临床意义。方法选择23例心功能不全住院病人,应用右胸导纳图技术(RCEAP)检测射血及射血前期肺动、静脉内血容量波变化,并与心导管术测定的肺动脉嵌压进行对比分析,求出两者间的相关性。结果射血前间期(Q-j间期)随心功能不全加重而时间延长,相反,射血期(j-z间期)相对缩短,肺动、静脉容量波变化比值(Hc/Hz),Hc=c波高度,Hz=z波高度)与PCWP的相关系数为0.8933(P<0.01)。结论RCEAP是评价左心功能的一种无创方法。

Objective To study the relationship and clinical significance between changes of right chest electrical admittance plethysmography（RCEAP） and pulmonary capillary wedge pressure （PCWP） on patients with cardiac insufficiency, Methods Twenty - three cases of cardiac insufficiency inpatients were selected to examine the changes of pulmonary blood volume wave in the ejection period（j -z period）and the stage before ejection period（ Q-j period）with RCEAP. As the same time, PCWP were measured by means of catheterization. Correlation between PCWP and parameters of RCEAP was analyzed. Results The worse the cardiac insufficiency is, the longer the Q - j period and the shorter the j - z period become. The correlative coefiqcient between Hc/Hz（ Hc = height of c wave, Hz = height of z wave） and PCWP was 0. 8933 （ P 〈 O. 01 ）. Conclusion RCEAP is a useful and noninvasive method for evaluating left ventrieular function.