Department of Radiology, The Ohio State University Medical Center, Columbus, OH 43210, USA.
J Thorac Imaging. 2012 Nov;27(6):359-65. doi: 10.1097/RTI.0b013e31824fcee0.
Discrete upper septal thickening (DUST) has been well described in the echocardiology literature. To our knowledge, the computed tomography findings of DUST, however, have not been previously described.
Five hundred consecutive coronary computed tomography angiograms were evaluated by 2 cardiothoracic radiologists for the presence of DUST.
Of the 500 studies reviewed, 23 cases had features consistent with DUST (23/500 = 5%). The average systolic blood pressure of patients with DUST (150/77 mm Hg) was higher than that of patients without DUST (133/75 mm Hg). Patients with DUST were older (mean 63 y) than patients without DUST (mean 50 y). None of these patients had evidence of abnormal systolic anterior motion of the mitral valve on cine imaging.
DUST is seen on coronary computed tomography angiograms and has imaging characteristics distinct from significant pathology, such as hypertrophic cardiomyopathy. Recognizing DUST is important because, unlike hypertrophic cardiomyopathy, previous studies have not found an associated adverse prognosis with DUST.
离散性上间隔增厚（DUST）在超声心动图文献中已有详细描述。据我们所知，DUST 的 CT 表现以前尚未描述过。
由 2 位心胸放射科医生对 500 例连续的冠状动脉 CT 血管造影进行评估，以确定是否存在 DUST。
在 500 项研究中，23 项研究符合 DUST 的特征（23/500=5%）。DUST 患者的收缩压（150/77mmHg）高于无 DUST 患者（133/75mmHg）。DUST 患者年龄较大（平均 63 岁），而无 DUST 患者年龄较小（平均 50 岁）。这些患者均无二尖瓣收缩期前向运动异常的影像学证据。
DUST 可见于冠状动脉 CT 血管造影，其影像学特征与肥厚型心肌病等明显病理学表现不同。认识到 DUST 很重要，因为与肥厚型心肌病不同，以前的研究并未发现 DUST 与不良预后相关。
