Department of Radiology, College of Medicine, Kyung Hee University, Dongdaemun-gu, Seoul, South Korea.
Clin Radiol. 2011 Oct;66(10):961-5. doi: 10.1016/j.crad.2011.04.016.
To describe and evaluate anatomical characterizations of incidental left atrial (LA) diverticula in patients with suspected coronary artery disease using 64-channel multidetector computed tomography (MDCT).
From October 2008 to June 2009, 2059 patients with suspected coronary artery disease underwent electrocardiogram-gated 64-channel MDCT. Five hundred and thirty-two LA diverticula were identified in 377 patients (18.3%, male to female ratio: 216:161, mean age 59±10.89 years, range from 20 to 91 years). Two radiologists retrospectively analysed the number (single or multiple), size (diameter and length), shape (cystiform or tubiform), surface (smooth or irregular), and location (right or mid or left/upper or lower/lateral or posterior). If the length/diameter was <1.5, the diverticular shape was considered to be cystiform.
Among 532 LA diverticula, single (270/532, 51.1%), cystiform (411/532, 77.3%), and smooth (332/532, 62.4%) diverticula were found. The right upper region (255/532, 47.9%) was the most common location, followed by the left lateral area (172/532, 32.3%). The average diameter was 4.7±2 mm (range from 1-19 mm), and the average length was 4.7±2.1 mm (range 1-13 mm). The average ratio of length to diameter was 1.15 (range 0.25-1.45). The average number of diverticula was 2±1.06 (range 1-5).
Incidental LA diverticulum is not an uncommon finding in patients with suspected coronary artery disease. MDCT can provide anatomical details of LA diverticula. However, further studies are needed to determine their clinical significance.
使用 64 层多排螺旋 CT（MDCT）描述和评估疑似冠心病患者左房（LA）憩室的解剖特征。
2008 年 10 月至 2009 年 6 月，2059 例疑似冠心病患者行心电图门控 64 层 MDCT 检查。在 377 例患者（男 216 例，女 161 例，平均年龄 59±10.89 岁，年龄 20~91 岁）中发现 532 个 LA 憩室。两名放射科医生回顾性分析了憩室的数量（单发或多发）、大小（直径和长度）、形状（囊状或管状）、表面（光滑或不规则）和位置（右侧、中部、左侧/上部、下部、外侧或后部）。如果长度/直径<1.5，则认为憩室形状为囊状。
532 个 LA 憩室中，单发（270/532，51.1%）、囊状（411/532，77.3%）和光滑（332/532，62.4%）憩室较常见。最常见的部位是右上区（255/532，47.9%），其次是左侧外侧区（172/532，32.3%）。平均直径为 4.7±2mm（范围 119mm），平均长度为 4.7±2.1mm（范围 113mm）。长度与直径的平均比值为 1.15（范围 0.251.45）。平均憩室数量为 2±1.06（范围 15）。
疑似冠心病患者中偶然发现的 LA 憩室并不少见。MDCT 可提供 LA 憩室的解剖学细节。然而，还需要进一步研究来确定其临床意义。
