Rheumatology Department, Hospital Universitario La Paz, Madrid, Spain.
Internal Medicine Department, Hospital Universitario La Paz, Madrid, Spain.
Rheumatology (Oxford). 2018 Feb 1;57(2):318-321. doi: 10.1093/rheumatology/kex381.
To explore whether the increase in the intima-media thickness (IMT) in arteriosclerotic disease correlates with the increase in the IMT in temporal arteries (TAs) and if that could mimic the US GCA halo sign.
Consecutive patients ⩾50 years old with high vascular risk and without signs or symptoms of GCA were included. The carotid US IMT measurements were obtained using a standardized software radiofrequency-tracking technology. Colour Doppler US and grey-scale measurements of the IMT in the branches of both TAs were performed by a second sonographer using a 22 MHz probe.
Forty patients were studied (28 men) with a mean age of 70.6 years. The carotid IMT exhibited significant correlation with the TA IMT. A carotid IMT >0.9 mm was associated with a temporal IMT >0.3 mm. Only one patient had an IMT >0.34 mm in two branches.
Atherosclerotic disease with a carotid IMT >0.9 mm increases the TA IMT and might mimic the halo sign. As atherosclerosis is common in this age group, we propose a cut-off of TA IMT >0.34 mm in at least two branches to minimize false positives in a GCA diagnosis.
探讨动脉粥样硬化性疾病中内-中膜厚度（IMT）的增加是否与颞动脉（TA）中 IMT 的增加相关，以及这种增加是否可以模拟 US GCA 晕环征。
连续纳入年龄 ⩾50 岁、血管风险较高且无 GCA 迹象或症状的患者。采用标准化软件射频跟踪技术进行颈动脉 US IMT 测量。由第二位使用 22 MHz 探头的超声医师进行彩色多普勒超声和双侧 TA 分支的 IMT 灰阶测量。
共纳入 40 例患者（28 名男性），平均年龄为 70.6 岁。颈动脉 IMT 与 TA IMT 呈显著相关性。颈动脉 IMT >0.9mm 与颞动脉 IMT >0.3mm 相关。仅 1 例患者在两支 TA 中 IMT >0.34mm。
颈动脉 IMT >0.9mm 的动脉粥样硬化性疾病会增加 TA IMT，可能会模拟晕环征。由于该年龄组中动脉粥样硬化较为常见，我们建议在至少两支 TA 中设定 TA IMT >0.34mm 的截断值，以最小化 GCA 诊断中的假阳性。
