Cardiac CT Assessment of Left Atrial Accessory Appendages and Diverticula

被引:49
作者
Abbara, Suhny [1 ]
Mundo-Sagardia, Jorge A. [1 ]
Hoffmann, Udo [1 ]
Cury, Ricardo C. [1 ]
机构
[1] Harvard Univ, Massachusetts Gen Hosp, Sch Med, Dept Radiol,Sect Cardiovasc Imaging, Boston, MA 02114 USA
关键词
atrial fibrillation; cardiac congenital disease; cardiac CT; left atrial accessory appendage; left atrial diverticulum; left atrial enlargement; thrombus; valvular heart disease; JUXTAPOSITION; ANGIOGRAPHY;
D O I
10.2214/AJR.08.2229
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
OBJECTIVE. The purpose of this study is to describe the prevalence, morphology, size, and location of left atrial abnormalities including diverticula and accessory appendages in consecutive patients undergoing cardiac-gated CT for coronary artery evaluation. MATERIALS AND METHODS. Routine retrospectively gated contrast-enhanced 64-MDCT angiography (0.75-mm collimation, 330-milliseconds gantry rotation time) was performed in 529 consecutive patients. CT data sets were evaluated using axial, sagittal, coronal, and interactive multiplanar reconstructions; maximum intensity projections (MIPs) and interactive volume rendering. The presence, type, and location of left atrial appendages and diverticula were recorded. RESULTS. One hundred twenty-one patients had left atrial accessory appendages (n = 20) or left atrial diverticula (n = 81) or both (n = 20). One hundred four left atrial diverticula were found in 101 of the 529 patients (20%) and 44 accessory appendages in 41 patients (8%). of the atrial diverticula, 88% were superior and anterior, 9% were right lateral superior, and 3% were inferior. Of accessory appendages, 34% were inferior posterior, 32% were left inferior, 18% were superior anterior, 14% were inferior posterior, and 2% were right inferior posterior. The average sizes of diverticula were 6.4 +/- 2.5 x 6.2 +/- 2.4 mm, and accessory appendages were 4.9 +/- 2.1 x 3.9 +/- 2.4 mm. CONCLUSION. Left atrial diverticula and accessory appendages are commonly found on cardiac-gated CT.
引用
收藏
页码:807 / 812
页数:6
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