数字减影造影测量左室容积及射血分数的研究  

Study on measurement of left ventricular volume and ejection fraction in digital subtraction angiography

作　　者：叶剑定[1] 凌美玲[1] 李志明[1] 郭德文[1] 

机构地区：[1]上海市胸科医院放射科,200030

出　　处：《放射学实践》1999年第4期231-233,共3页Radiologic Practice

摘　　要：目的 :通过心室定量模拟实验 ,比较长度 面积法和视频密度法测量心室不同收缩及显影状态室腔容积和射血分数 (EF)的准确性。方法 :对室壁不同运动状态及室腔显影不均的单、双向造影像 ,分别以长度 面积法和视频密度法测量室腔容积和EF并与实际值比较。结果 :双向造影的长度 面积法EF测量值与实际值无显著性差异 (P >0 .0 5 ) ;单向造影的测量值在局部室壁运动减弱时差异显著 (P <0 .0 1) ;视频密度测量法在室腔内造影剂混合不均时测量值有显著差异 (P <0 .0 1)。结论 :室壁运动正常的左室DSA ,单向造影的长度 面积法可替代双向造影测量心室EF ;局部室壁运动异常时 ,双向造影测量的正确性较高 ;视频密度测量法可用于中心静脉法DSA测量左室EF而不宜用于选择性左室造影。Objective:The area length and videodensitometry methods were employed to calculate left ventricular (LV) volume and ejection fraction (EF) quantitatively in analog experiments in DSA.The measurement values were compared with real values so as to choose the best measuring method in order to improve the accuracy of quantitative diagnosis in clinical use.Methods:On single plane and biplane DSA images (including cases with normal ventricular wall motion,hypokinesia and insufficient mixing of contrast medium in ventricular cavity) the area length method and videodensitometry method were used to calculate the volume and EF respectively.Results:The result of biplane area length method was found to be more accurate than those obtained with other two methods in abnormal wall motion and insufficient mixing of contrast medium,the error of EF was nonsignificant (P>0.05);but in the calculation of LV volume and EF by single plane area length method,the error of EF was significant (P<0.01) when there was hypokinesia of local wall motion. The error of EF obtained with videodensitometry method also was significant (P<0.01) when there was insufficient mixing of contrast mediun in the ventricule.Conclusion:The single plane area length method is suitable for cases who do not have abnormal wall motion and may replace biplane area lenth method in clinical practice;but in cases having hypokinesia of local wall motion,the result of biplane area lenth method was more accurate.The videodensitometry method cannot be used in selective LV DSA because of insufficient mixing of contrast medium,but it can be used in intravenous DSA with accurate result.

关 键 词：数字减影 血管造影 左室射血分数 左室容积 

分 类 号：R540.4[医药卫生—心血管疾病] R816.2[医药卫生—内科学]