左心房憩室样结构的双源CT成像

The diagnosis of diverticulum of the left atrium by dual-source CT angiography

目的:利用双源CT血管造影评价左心房憩室样结构的发生率、发生部位及形态学变化。方法:随机搜集的415例成人冠状动脉双源CT血管造影图像进行回顾性分析。结果:发现左心房憩室样结构85例,检出率为20.5%(85/415),总计87个憩室(2例有2个憩室)位于左房上壁77例及下壁8例,憩室底部开口0.5～1.1cm,平均0.8cm,深度0.6～1.2cm,平均0.9cm,底部形态呈尖角状或不规则菜花状。结论:双源CT血管成像能够清晰显示左心房憩室的发生部位及形态变化,有利于临床进行电生理治疗的术前评估。

Objective： To evaluate the incidence, position and shape of diverticulum of the left atrium by dual-source CT angiography. Methods：A total of 415 cases who had undergone coronary CT angiography （CCTA） at dual-source CT were enrolled. The CCTA images were retrospectively analyzed. Results：Eighty-five of 415 patients （20.5 % ） had 87 left at- rial diverticula （two cases had two diverticula）. Seventy-seven diverticula were located in the upper atrial wall and 8 were lo- cated in the lower atrial wall. The diameters of orifice were 0.5cm to 1. 1cm （average 0.8cm）, the depth were 0. 6cm to 1.2cm （average 0.9cm）. The bottom of the diverticula had the shape of small sharp angle or flat cauliflower. Conclusion： CCTA with duabsource CT can demonstrate the position and shape of the left atrial diverticula. It is helpful to electrophysi- ological procedures and pre-ablation evaluation.