用重建心阻抗图探讨O波形成的机制  

Investigation on formation mechanism of O wave by reconstructing impedance cardiography

作　　者：况明星[1] 况南珍[1] 肖秋金[2] 崔超英[1] 洪文钦[1] 

机构地区：[1]南昌大学医学院基础医学部,江西南昌330006 [2]解放军第94医院特诊科,江西南昌330002

出　　处：《第四军医大学学报》2007年第1期36-38,共3页Journal of the Fourth Military Medical University

基　　金：江西省自然科学基金(0340060)

摘　　要：目的:探讨胸部体表O波形成的机制.方法:6对方片电极检测胸部体表阻抗变化,用波形重建获得重建心阻抗微分图,对比正常组和异常组的O波幅度,用阻抗变化叠加原理分析胸部体表O波形成的机制.结果:胸部体表O波是重建心阻抗微分图的血管分量O波和心室分量O波叠加而成的;在心功能正常的情况下,体表O波以心室分量O波为主;在心功能不全的情况下,当血管分量O波大于心室分量O波时,体表O波中以血管分量O波为主.结论:血管分量PL′,PR′的O/C比值可以用于评价左室舒张功能.AIM： To investigate the formation mechanism of O wave on the chest surface. METHODS：Impedance changes on thoracic surface were measured by 6-pair rectangular electrodes, and the reconstructed impedance differential cardiography was got by wave reconstruction. O wave amplitudes of normal and abnormal groups are compared. The formation mechanism of O wave on thoracic surface was analyzed by superposition principle of impedance change. RESULTS： O wave of thoracic surface was superposition of O waves of blood components and ventricular components on reconstructed impedance differential cardiography. If heart function was normal, O waves of ventricular components would be major in O wave on surface; If heart function was unusual and O waves of blood components were more than O waves of ventricular components, O waves of blood components would be major in O wave of surface. CONCLUSION： O/C ratio of blood components PL＇ and PR＇ can be used to estimate the left ventricular diastolic function.

关 键 词：重建 心阻抗图 阻抗变化 叠加 O波 

分 类 号：R443.8[医药卫生—诊断学]