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Novel and Innovative Hybrid Technique for Type A Aortic Dissection
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Stent grafting-related acute type B redissection.
Vincent Riambau1, Francisco Guerrero, Ivan Murillo
1Vascular Surgery Division, Thorax Institute, Hospital Clinic, Barcelona, Spain. vriambau@clinic.ub.es
Vascular
|April 2, 2008
Summary
Endovascular aneurysm repair (EVAR) for type B aortic dissection (TBAD) can lead to distal dissections if stent grafts angulate. Proper prosthetic alignment is crucial to prevent complications and ensure patient safety.
Area of Science:
- Vascular Surgery
- Interventional Cardiology
- Medical Device Engineering
Background:
- Endovascular aneurysm repair (EVAR) is a common treatment for aortic pathologies.
- Type B aortic dissection (TBAD) presents unique challenges for EVAR, particularly regarding distal sealing.
- Chronic TBAD with aneurysm formation requires careful consideration of EVAR device placement.
Observation:
- Two cases of TBAD treated with EVAR developed distal dissections during long-term follow-up (48 and 39 months).
- Computed tomographic angiography revealed new false lumen reperfusion and distal aortic expansion.
- Angulated alignment of the distal stent graft at the secondary entry site was observed in both patients.
Findings:
- Distal dissections are a potential complication of EVAR in TBAD patients.
- Prosthetic alignment with the aortic axis is critical for preventing secondary entry sites and wall stress.
- Successful treatment was achieved with distal endograft deployment.
Implications:
- Emphasizes the importance of precise prosthetic alignment in the distal landing zone during EVAR for TBAD.
- Recommends landing the distal stent graft in a straight segment of the descending aorta.
- Highlights the need for vigilant long-term surveillance after EVAR in complex aortic dissections.
