先天性腹主动脉断裂患者的诊断及其离断变异分析

Rare variation of abdominal aorta breaking in two

目的探明1例腹主动脉变异的类型及成因。方法使用钆增强的磁共振血管造影术(MRA)腹部血管造影结合最大强度投影和容积再现方法研究了1例数字减影血管造影(DSA)发现的先天性腹主动脉断裂患者。结果 MRA 清楚地显示出离断的腹主动脉变异:腹主动脉在发出双侧肾动脉后即断裂;下段的腹主动脉起始于 L_(3-4)椎间隙水平,发出肠系膜下动脉。断裂的腹主动脉通过代偿增粗的肠系膜上下动脉的侧支互相连接。结论胚胎发育时期的不明外力作用造成了这一无症状的腹主动脉断裂变异。

Objective To discuss a rare variation of abdominal aorta breaking in two. Methods An in-patients, female, aged 76, admitted for asthenia of right extremities, underwent gadolinium-enhanced magnetic resonance angiography （MRA） of cerebral and abdominal vessels and abdominal MRI in whom the conventional angiography had failed to reveal this vascular abnormality. Results MRA showed a clearly separated abdominal aorta. The upper part of the abdominal aorta terminated under the two renal artery branches and the lower part terminated at the level of L3-4. The compensated enlarged superior and inferior mesenteric artery connected these two isolated parts of abdominal aorta Conclusion This rare variation of abdominal aorta without any symptom is probably caused by some external force during the embryonic period.