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Aneurysm management involves either conservative medical therapy or surgical intervention, depending on the size and symptoms of the aneurysm. Conservative management is generally reserved for smaller, asymptomatic aneurysms, while larger or symptomatic aneurysms often necessitate surgical repair.Conservative Medical TherapyFor small, asymptomatic aneurysms, particularly abdominal aortic aneurysms (AAA) less than 5.5 centimeters in diameter, conservative medical therapy is recommended. This...
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A modified frozen elephant trunk technique offers a safe solution for repeat aortic dissection surgery. This approach avoids complications and shows promising early results in a small patient cohort.

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Area of Science:

  • Cardiovascular Surgery
  • Thoracic Aortic Surgery
  • Aortic Dissection Repair

Background:

  • Repeat surgery for chronic aortic dissection after Type-A acute aortic dissection (AAD) repair is challenging.
  • Existing techniques like staged procedures, traditional frozen elephant trunk (FET), and thoracic endovascular aortic repair (TEVAR) have limitations.
  • Enlargement of the aorta and limited graft length in prior repairs complicate reoperative access and landing zone creation.

Purpose of the Study:

  • To evaluate a modified FET technique for reoperative repair of chronic aortic dissection.
  • To assess the safety and efficacy of this modified approach in patients with prior ascending aorta replacement.

Main Methods:

  • Retrospective review of five consecutive patients treated between 2014-2017.
  • Utilized a modified FET technique involving total aortic arch and descending aorta exclusion without manipulating the native dissected aorta.
  • Anastomosed the stent graft to the existing ascending aorta graft at Hishimaru's zone 0, rerouting cerebral vessels.

Main Results:

  • No early or midterm mortality observed.
  • Mean follow-up of 22 months with no major or minor neurologic events.
  • Mean interval between surgeries was 26 months; mean circulatory arrest time was 16 minutes.

Conclusions:

  • The modified FET technique is a viable and safe option for complex reoperative aortic dissection.
  • This approach successfully excluded the dissected aorta without direct manipulation, achieving good short-term outcomes.
  • Further studies with larger patient numbers and longer follow-up are needed to validate these findings.