Spontaneous isolated superior mesenteric artery dissection
ICD-10 I72.9 · ICD-11 BD51.Y

Treatment of Spontaneous Isolated SMA Dissection in Hemodynamic Instability or with Signs of Mesenteric Ischemia

Patients with spontaneous isolated superior mesenteric artery (SMA) dissection who present with hemodynamic instability, clinical signs of mesenteric ischemia, or imaging evidence of disease progression represent a high-risk subset requiring urgent intervention. The protocol below addresses this specific clinical situation.

Clinical scenario

This protocol applies when one or more of the following is present:

  • Hemodynamic instability
  • Signs and symptoms of mesenteric ischemia
  • Radiological evidence of progression or worsening SMA dissection — including thrombus formation, luminal narrowing, or saccular aneurysm formation

Hemodynamically unstable patients with signs of ischemia, or those showing radiological progression of the dissection, are at high risk of rupture and require urgent revascularization.

Approach (partial overview)
Urgent endovascular revascularization is the primary approach in this setting. Endovascular options — including stent placement in the SMA and several alternative techniques — are available; the specific choice and sequence depend on clinical and anatomical factors detailed in the full protocol.
Treatment goals: Relief from mesenteric ischemia and prevention of further progression of the dissection.
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References

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.

The two main revascularization techniques are endovascular or surgical repair.

Endovascular management includes intralesional thrombolytic therapy, stent placement, embolotherapy and balloon angioplasty.

In most cases, stents up to a diameter of 10 mm and lengths of 10 cm were used.

Endovascular technique is a minimally invasive procedure, prevents progression of dissection and provides instant relief from ischemia with shorter hospital stays.

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