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目的探讨双源CT检测窦房结动脉的价值及其临床意义。方法选择利用双源CT进行冠状动脉成像的成人207例,根据窦房结动脉显示的长度和清晰度进行评分和分级、评价双源CT对窦房结动脉的显示情况。对窦房结动脉的直径、开口与其起源的冠状动脉起点之间的距离(S-O间距)进行测量,观察窦房结动脉开口处冠状动脉壁钙化对窦房结动脉显示情况及管径的影响。结果共显示239支窦房结动脉,其中右侧型、左侧型、双侧型分别占64.3%、20.3%、15.5%。左、右窦房结动脉显示良好率分别为77.0%和81.2%。正常窦房结动脉的平均直径约为(0.20±0.04)mm,当窦房结动脉开口处的冠状动脉壁出现钙化时其直径为(0.18±0.03)mm,具有统计学差异(t=2.558,P=0.011)。同时,钙化也影响窦房结动脉长度、清晰度及总体情况的显示(P<0.05)。结论双源CT是显示窦房结动脉的良好方法,冠状动脉钙化可能影响窦房结动脉的血供。
Objective To investigate the value and clinical significance of dual-source computed tomography in detecting the sino-atrial node artery. Methods A total of 207 adult patients with dual-source CT coronary angiography were selected and scored and graded according to the length and resolution of the sino-atrial node artery. The diameter of the sino-atrial node artery, the distance between the opening and the origin of the coronary artery (S-O distance) were measured to observe the effect of coronary artery wall calcification on the sino-atrial node arteries and the diameter of the stenosed artery. The results showed a total of 239 sinus node arteries, of which the right type, left type, bilateral type accounted for 64.3%, 20.3%, 15.5%. Left and right sinus node arteries showed good rates of 77.0% and 81.2%, respectively. The average diameter of the normal sinus node was about (0.20 ± 0.04) mm. The diameter of the coronary artery wall at the opening of the sinoatrial node artery was (0.18 ± 0.03) mm with a statistically significant difference (t = 2.558, P = 0.011). At the same time, calcification also affected the length, sharpness and general condition of the sinoatrial node (P <0.05). Conclusion Dual-source computed tomography (CT) is a good method to display the sinus node arteries. Coronary artery calcification may affect the blood supply of the sino-atrial node arteries.