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目的:利用CT三维成像技术研究心房颤动(房颤)患者左房结构的形态学特点。方法:利用西门子16层螺旋CT作36例房颤患者[23例男性,年龄(51±12岁)]与21例非房颤患者[12例男性,年龄(46±11)岁]的心脏扫描,研究左心房的结构形态学特点并作对比分析。结果:房颤组与非房颤组相比左心房容积和左心耳较大,差异有统计学意义;二者的左心耳位置、左心耳-肺静脉脊(房颤组:长2·8±0·5,宽0·4±0·1;非房颤组:长2·7±0·4,宽0·4±0·1)和左心房顶部的形态学特点无明显差异;房颤组肺静脉开口异常率高达17%,非房颤组为10%,2组相比较差异无统计学意义。结论:房颤患者有着较大的左心房和左心耳,在左心耳位置、左心耳-肺静脉脊、左心房顶部和肺静脉开口等特殊解剖结构上与非房颤患者无差别。这些发现对减少射频消融术并发症及改进手术方法等方面能提供有用信息。
Objective: To study the morphological characteristics of left atrial structure in patients with atrial fibrillation (AF) by CT three-dimensional imaging. METHODS: Thirty-six patients with atrial fibrillation (23 males, 51 ± 12 years of age) and 21 patients without atrial fibrillation (12 males, 46 ± 11 years of age) underwent 16-slice spiral CT using Siemens 16- , Study the morphological characteristics of the left atrium and make comparative analysis. Results: Compared with non-AF group, the left atrium volume and left atrial appendage were significantly larger in the atrial fibrillation group than in the non-atrial fibrillation group (P <0.05). There were significant differences between the left atrial appendage and left atrial appendage-pulmonary vein ridge · 4, 0 · 4 ± 0 · 1; non-atrial fibrillation group: 2 · 7 ± 0 · 4, width 0 · 4 ± 0 · 1) and morphological features of the left atrium had no significant difference; The abnormal rate of pulmonary vein opening was as high as 17% and that of non-AF group was 10%. There was no significant difference between the two groups. CONCLUSIONS: Atrial fibrillation patients have larger left atrium and left atrial appendage. There is no difference between AF patients and non-AF patients in special anatomical structures such as left atrial appendage, left atrial appendage-pulmonary veins ridge, left atrium top and pulmonary veins opening. These findings provide useful information on reducing complications from radiofrequency ablation and improving surgical procedures.