心脏远程监护技术、超声心动图及动态心电图诊断无症状心肌缺血的准确性

Clinical accuracy of cardiac remote monitoring, ECHO and DCG in the diagnosis for SMI

目的:探讨心脏远程监护技术、超声心动图(ECHO)和动态心电图(DCG)诊断冠心病无症状心肌缺血(SMI)的临床准确性。方法:选取医院收治的63例冠心病(CHD)患者,以冠状动脉造影(CGA)诊断结果为金标准,回顾性分析心脏远程监护技术、ECHO和DCG诊断SMI的灵敏度、准确度、特异度、阳性预测值、阴性预测值、Youden指数以及Kappa值。结果:以冠状动脉造影诊断结果为金标准,在63例CHD患者中共检出41例SMI,心脏远程监护技术、ECHO和DCG诊断SMI的符合率分别为92.68%、53.66%和90.24%;诊断SMI的灵敏度和特异度分别为92.68%和77.27%、53.66%和90.24%以及86.36%和22.73%;Youden指数分别为0.700、0.236和0.766;心脏远程监护技术、DCG诊断SMI的Youden指数明显高于ECHO,二者诊断SMI结果与CGA具有极好一致性。结论:心脏远程监护技术可作为DCG诊断的有效补充手段,对于SMI早期诊断具有十分重要的临床意义。

Objective:To investigate the clinical accuracy of cardiac remote monitoring,echocardiography(ECHO)and dynamic electrocardiography(DCG)in the diagnosis forsilent myocardial ischemia(SMI)of coronary heart disease(CHD).Methods:63patientswith CHD were enrolled in this retrospective analysis and coronary angiography(CGA)wasused as gold standard to analyze and judge the sensitivity,accuracy,specificity,positive predictive value,negativepredictive value,Youden index and Kappa value of cardiac remote monitoring technique,ECHO and DCG in thediagnosis for SMI.Results:As the results of gold standard(CGA),41cases of63patients with CHD were diagnosedas SMI,the diagnose accordance rates of cardiac remote monitoring technique,ECHO and DCG,respectively,were92.68%,53.66%and90.24%.And the sensitivity and specificity of the three methods for SMI,respectively,were92.68%and77.27%,53.66%and90.24%,and86.36%and22.73%.The Youden Indexes of the three methods were0.700,0.236and0.766,respectively.As above results,the Youden Indexes of cardiac remote monitoring techniqueand DCG were obviously higher than that of ECHO,and their diagnosis for SMI has excellent accordance with CGA.Conclusion:The technique of cardiac remote monitoring can be used as an effective supplementary means of DCG,and it has great clinical significance in the early diagnosis for SMI.