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Controversies in Chronic Aortic Dissection
Yanqing Zhao1,2, Shinichi Fukuhara3, Minhaj S Khaja1,3
1Division of Vascular and Interventional Radiology, Department of Radiology, University of Michigan Health, Ann Arbor, Michigan.
Insights
Thoracic endovascular aortic repair (TEVAR) is a viable option for chronic type B aortic dissection (cTBAD), especially for high-risk patients. Advances in endovascular techniques improve outcomes, but further research is needed for long-term validation.
Area of Science:
- Cardiovascular Surgery
- Vascular Medicine
- Interventional Cardiology
Background:
- Chronic type B aortic dissection (cTBAD) poses risks of aneurysm and rupture, traditionally treated with open surgery.
- Endovascular therapies, specifically thoracic endovascular aortic repair (TEVAR), are increasingly considered for cTBAD.
- Challenges for TEVAR in cTBAD include dissection septum thickness, inadequate landing zones, and persistent false lumen flow.
Purpose of the Study:
- To review the current role and emerging endovascular techniques for treating cTBAD.
- To discuss technical considerations and outcomes of catheter-based interventions for cTBAD.
- To highlight the growing evidence supporting TEVAR in high-risk cTBAD patients.
Main Methods:
- Review of current literature on endovascular treatment for cTBAD.
- Analysis of advancements in TEVAR techniques, including false lumen obliteration and landing zone strategies.
- Discussion of technical challenges and clinical outcomes associated with TEVAR in cTBAD.
Main Results:
- TEVAR is increasingly recognized as a feasible treatment option for cTBAD.
- New endovascular techniques have improved technical success rates and clinical outcomes.
- Evidence suggests TEVAR is particularly beneficial for high-risk patients unsuitable for open surgery.
Conclusions:
- TEVAR is a promising alternative to open surgery for select cTBAD patients.
- Ongoing research and validation of advanced endovascular techniques are crucial for long-term efficacy.
- Catheter-based approaches offer evolving solutions for managing cTBAD complications.
Abstract:
Chronic type B aortic dissection (cTBAD) often requires intervention due to complications like aortic aneurysmal dilatation and rupture, traditionally managed via open surgery. With the continued rise of endovascular therapies, thoracic endovascular aortic repair (TEVAR) is increasingly used, although its role in cTBAD is debated due to challenges such as a thick dissection septum, poor landing zones, and persistent false lumen flow. However, mounting evidence demonstrates TEVAR is a viable option for cTBAD, particularly for patients with high risks treated with open surgery. Advances in endovascular techniques, such as false lumen obliteration techniques and landing zone optimization strategies, have enhanced its technical success rate and clinical outcomes. However, continued research is needed to validate these methods and confirm their long-term benefits. In this review article, we not only update the emerging endovascular armamentarium but also discuss the technical considerations in catheter-based treatment approaches and respective outcomes.
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