论文部分内容阅读
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: To determine the accuracy of ventricular volume and ejection fraction (EF) in different contractile and visual ventricles by comparing the length area method with the video density method by ventricular quantitative simulation. Methods: The ventricular volume and EF were measured by the length area method and the video density method, respectively. The results were compared with the actual values. Results: There was no significant difference between the two measurements (P> 0.05) in the EF measurement of the two-way angiography (P> 0.05), and the difference between the one-way angiography and the local wall motion was significant (P <0.01) There was significant difference (P <0. 01) in the measurement of video density when there was uneven mixing of contrast agent in the chamber. CONCLUSIONS: Normal left ventricular DSA and unilateral radiography length area method can replace bi-directional radiography to measure ventricular EF. When regional wall motion is abnormal, bi-directional radiography is more accurate. Video density measurement can be used for central venous DSA measurement of left ventricular EF and should not be used for selective left ventricular angiography.