摘要
目的：总结室壁瘤的ＭＲＩ诊断要点，探讨其诊断价值和限度。材料与方法：全组２４例，由急性心肌梗死史、超声心动图和放射性核素显像或冠状动脉加左室造影及手术确立室壁瘤的诊断。结果：左心室壁显著节段性变薄，厚度为１～３ｍｍ（平均１．８±０．８ｍｍ），伴有信号强度减低及变薄节段外凸，至少一个节段室壁反向运动及无运动，且收缩期增厚率消失。左心室显著扩大，舒张末期容积达２０６±１３８．３ｍｌ，高于正常对照组１００．５±２５．９ｍｌ（Ｐ＜０．０１）。左心室收缩功能受损，平均射血分数为４０．８％±１１．７％，短轴缩短率为１７．７％±４．３％。２例患者有附壁血栓，位于邻近变薄室壁的左室腔内，呈高信号。结论：ＭＲＩ所见能反映室壁瘤的病理变化，本组阳性率达１００％。
Purpose: To describe the characteristic findings of ventricular aneurysm (VA), and to evaluate the diagnostic efficacy of MRI. Materials and methods: Twenty four cases (male 23, female 1) were studied. The diagnosis of VA was established by acute myocardial infarction history, echocardiography , and radionuclide imaging, or coronary arteriography and ventriculography and operation. Results: The MRI signs of VA included: severe segmental thinning of left ventricular wall ranging from 1 to 3mm (mean: 1.8±0.8mm), with low signal intensity and outward bulging of the thinned segment both in diastolic and systolic phase, at least one segment of ventricle demonstrated dyskinesis or akinesis, without wall thickening during systole. The left ventricle (LV) was remarkably enlarged and the end diastolic volume of LV was 206.0±138.3ml, higher than normal group 100.5±25.9ml ( P <0.001). Impaired left ventricular contraction with the mean LV ejection fraction of 40.8%±11.7%, whereas short axis shortening fraction was 17.7%±4.3%. There was thrombosis in 2 patients with medium high signal intensity close to the thinned wall of the LV cavity. Conclusion: MRI findings could reflect the pathologic changes of VA, and the positive rate was 100% in this series.
出处
《中华放射学杂志》
CAS
CSCD
北大核心
1997年第5期311-314,共4页
Chinese Journal of Radiology
