64排螺旋CT对心房颤动患者导管消融治疗后肺静脉狭窄的评价

目的：利用CT三维成像评价心房颤动（房颤）患者行环肺静脉电隔离（CPVI）术后肺静脉狭窄的发生情况。方法对28例行CPVI术（6.5±3.9）个月的房颤患者进行随访，研究导管消融术后肺静脉的形态结构学特点与术前做对比分析；应用64排螺旋CT测量CPVI术前后肺静脉口的径线、截面积、左心房容积。结果 CPVI术后肺静脉的最大径、最小径轻度狭窄率分别为61.6%、56.3%。中度狭窄率分别为3.6%、5.4%；所有患者随访时未出现静息或活动后肺静脉狭窄的常见症状。结论 CPVI术后可引起部分患者无症状性轻度及中度肺静脉狭窄。

64 multislice computed tomography evaluate the vein stenosis in patients with atrial ifbrillation after radiofrequency ablation

Objective Using CT three-dimensional image technique to observe the pulmonary vein stenosis of circumferential pulmonary vein ablation （CPVA） for atrial ifbrillation （AF） on the structure of pulmonary vein before and after radiofrequency ablation. Methods 28 patients with AF who underwent CPVA were followed-up for a mean （6.5±3.9） months.The results of Pulmonary vein morphology study was compared with analysis of preablation, after following up radiofrequency catheter alation （6.5±3.9） months. Pulmonary vein diameters, cross-sectional area and left atrial volume were measured before and after CPVA using 64-slice multidector computed tomography （CT）. Results Mild stenosis of pulmonary vein maximum diameter and pulmonary minimum diameter were 61.6%and 56.3%after CPVA. Moderate stenosis of pulmonary vein maximum diameter and pulmonary minimum diameter were 3.6%and 5.4%. All patients does not present symptoms of pulmonary vein stenosis at rest on during excercise during follow up. Conclusions Mild and moderate asymptomatic pulmonary vein stenosis may present in some patients after CPVA.