Spontaneous isolated superior mesenteric artery (SMA) dissection presenting with hemodynamic instability, signs and symptoms of mesenteric ischemia, or radiological evidence of progression — including thrombus formation, luminal narrowing, or saccular aneurysm formation — places patients at high risk and requires urgent intervention.
In this high-risk setting, urgent endovascular revascularization — stenting of the SMA, intralesional thrombolysis, balloon angioplasty, or embolotherapy — is typically the initial approach, with the goals of relieving mesenteric ischemia and preventing further progression of the dissection. When those goals are not reached, or the patient's condition continues to deteriorate, the management pathway escalates.
The structured protocol for this situation involves surgical revascularization via laparotomy. The specific procedures employed depend on the extent of the dissection and the viability of the bowel — the complete decision sequence and full range of options are available in the structured regimen.
Successful resolution of symptoms.
DOI: 10.4070/kcj.2018.0429
Hemodynamically unstable patients having signs and symptoms of ischemia or those with radiological evidence of progression or worsening SMA dissection, such as formation of thrombus, narrowing or saccular aneurysm formation, should have urgent revascularization, as they are at high risk of rupture.
A surgical procedure is inevitable in cases of bowel infarction or SMA rupture.
We found that about 28.9% (n=42/145) patients underwent surgical management and that bypass grafting was the commonest procedure.
The extent and type of surgery depends on the viability of gut, type of dissection and the reversibility of circulation.
These surgical interventions for SMA dissection had successful resolution of symptoms on their mean follow up of 15.8 months where the follow up ranged from 0.23 to 48 months.
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