摘要
目的以超声心动图(UCG)为标准,衡量阻抗心动图(ICG)监测心脏收缩功能的准确性。方法健康青年30名为对照组,30名自主神经功能紊乱综合征患者(PSDS)为患者组,同时用UCG与ICG测量左心收缩功能SV、SI、CO、CI、EF及ET、PEP、HR,比较两种方法的测值,利用回归方程校正ICG测值。结果两种方法对对照组的测值无显著性差异(P>0.05)。患者组的SV变异系数大,达0.22,方差149.43,两种方法对基于SV的参数SV、SI、EF测值有差异显著性(P<0.05),ICG的测值比UCG大,可用回归方程加以校正(P<0.05),回归系数分别为0.92、0.93、0.96;基于时间的参数PEP、ET、HR无差异显著性(P>0.05);CO、CI是SV与心率的乘积,亦无差异显著性(P>0.05)。结论 ICG测量心脏收缩功能,对于变异小的指标,测值与UCG高度相关,两种方法无差异显著性。对于变异大的SV及EF,所测结果与UCG有差异显著性,ICG的测值比UCG稍大,可通过回归方程给予校正。ICG进行心功能连续监测任务具有可行性。
Objective To evaluate accuracy of Impedance cardiography（ICG）in measuring cardiac systolic function by a gold standard with Ultrasonocardiography（UCG）.Methods 30 healthy young volunteers were assigned to control group,18 males and 12 females,aged 27.9（23-34）.30 patients with Parasympathetic Dysfunction Syndrome（PSDS）and without organic cardiopathy were assigned to patient group,11 males and 19 females,aged 54.8（42-68）.After 20 minutes＇repose on bed,left cardiac systolic functions＇stroke volumn（SV）,stroke index（SI）,cardiac output（CO）,cardiac index（CI）,ejecting fraction（EF）,ejecting time（ET）and Preejection period（PEP）of all these objects were simultaneously measured by UCG and ICG for 4 times,2 minutes＇interval each time.Subsequently,the same procedure of another 4 times were performed after 20 minutes＇standing.Data of UCG and ICG were analyzed and compared.Results There was no significant difference in control group＇s measurement between UCG and ICG（P〉0.05）.In patient group,variance coefficient（CV）of SV was large,reaching 0.22,and sequare diversity（SD）reaching 149.43.SV had a significant difference between UCG and ICG（P〈0.05）,as well as SI and EF.Measurement of ICG value was larger than that of UCG,and regression equation correction was available（P〈0.05）,regression coefficience was 0.92,0.93,0.96.Time-based parameters of PEP,ET,HR,CO AND CI had no significant difference（P〉0.05）.Conclusions For parameters of small variation,ICG measuring left cardiac systolic function is highly correlated with UCG,without significant difference.Whereas for parameters of large variation,had a significant difference,ICG＇s value is slightly larger than that of UCG,correction can be achieved by regression equations.ICG is feasible for continuous monitoring of left cardiac function.
出处
《中国医药指南》
2011年第21期38-40,共3页
Guide of China Medicine
关键词
超声心动图
阻抗心动图
心脏收缩功能
回归方程
Ultrasonocardiography
Impedance cardiography
Cardiac Systolic Function
Regression Equation
