Type B Aortic Dissection
Dissection originating distal to left subclavian (DeBakey III / Stanford B)
All Pathways
Cardiothoracic SurgeryEmergency
Type B Aortic Dissection Management (EACTS/STS 2024)
Type B Aortic Dissection Management (EACTS/STS 2024): Type B Aortic Dissection → Confirm Diagnosis → Complicated vs Uncomplicated? → Complicated TBAD → ...
Pathway Overview
11 steps
Algorithm Steps
11 total
01Start 02Action Confirm Diagnosis
CTA chest/abdomen/pelvis (gold standard)
- CTA: identify entry tear, extent, branches involved
- Entry tear usually just distal to L subclavian
- ASSESS FOR:
- • Branch vessel involvement
- • Malperfusion syndromes
- • Maximum aortic diameter
- • False lumen status (patent, thrombosed, partial)
03Decision Complicated vs Uncomplicated?
Key determinant of management
- COMPLICATED (any of):
- • Malperfusion (renal, mesenteric, limb)
- • Rupture or impending rupture
- • Refractory pain/hypertension
- • Rapid expansion
- UNCOMPLICATED:
- • Stable patient, no malperfusion
04Action Complicated TBAD
Requires urgent intervention
- TEVAR is first-line (Class I)
- Goals:
- • Cover entry tear
- • Restore true lumen flow
- • Relieve malperfusion
- May need adjuncts:
- • Branch vessel stenting
- • Fenestration (rare)
05Action TEVAR Procedure
Thoracic endovascular aortic repair
- COVERAGE:
- • Cover primary entry tear
- • Landing zones: Zone 2-4 typically
- • May need L subclavian coverage (revascularize if needed)
- GOAL: Promote false lumen thrombosis
- and aortic remodeling
- Success rate: >90% for acute complicated
06Action Long-Term Medical Management
All patients, lifelong
- Blood pressure control (<130/80)
- Beta-blocker preferred
- Smoking cessation
- Lipid management
- SURVEILLANCE:
- • CTA at 1, 3, 6, 12 months
- • Then annually
- • Watch for aneurysmal degeneration
07Action Long-Term Surveillance
Critical for all TBAD patients
- 30% develop aneurysmal degeneration
- requiring intervention
- RED FLAGS on imaging:
- • Aortic growth >5mm/year
- • New dissection extension
- • Persistent patent false lumen
- • End-organ malperfusion
08Outcome Stable / Remodeled
Continue lifelong surveillance and medical therapy
- Path rejoins step 05Shared downstream outcome
09Action Open Surgical Repair
Reserved for specific indications
- INDICATIONS:
- • TEVAR not feasible (anatomy)
- • Connective tissue disorder (debated)
- • Aneurysmal degeneration >55-60mm
- • Chronic dissection with symptoms
- Approach: Left thoracotomy, CPB,
- deep hypothermia, graft replacement
- Path rejoins step 07Shared downstream outcome
10Action Uncomplicated TBAD
Optimal medical therapy first-line
- IMPULSE CONTROL (immediate):
- • Target HR <60 bpm
- • Target SBP 100-120 mmHg
- • Beta-blocker FIRST (esmolol, labetalol)
- • Then add vasodilators if needed
- Pain control (avoid tachycardia)
- ICU monitoring 48-72h minimum
11Action Assess High-Risk Features
May benefit from early TEVAR
- HIGH-RISK ANATOMY:
- • Entry tear >10mm
- • Aortic diameter >40mm at presentation
- • False lumen diameter >22mm
- • Patent false lumen with partial thrombosis
- • Connective tissue disorder (Marfan, etc)
- Consider TEVAR in subacute phase (2-6 weeks)
- if high-risk features present
- Path rejoins step 05Shared downstream outcome
- Path rejoins step 06Shared downstream outcome
- Path rejoins step 06Shared downstream outcome
Guideline Source
EACTS/STS 2024 Aortic Guidelines - Type B Dissection
Clinical Safety Information
Clinical Decision Support — Not a Substitute for Clinical Judgment
Individual patient factors may require deviation from these recommendations.
Known Limitations
- TEVAR for uncomplicated TBAD still debated (INSTEAD, ADSORB trials)
- Optimal timing of intervention in subacute phase unclear
- Definition of 'high-risk features' varies between guidelines
- Medical management success varies by center
Applicable Regions
USEU
Version 1Next review: 2027-01-11
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Related Resources
Frequently Asked Questions
What is the Type B Aortic Dissection Management (EACTS/STS 2024)?
The Type B Aortic Dissection Management (EACTS/STS 2024) is a emergency clinical algorithm for Cardiothoracic Surgery. It provides a structured decision tree to guide clinical decision-making, based on EACTS/STS 2024 Aortic Guidelines - Type B Dissection.
What guideline is the Type B Aortic Dissection Management (EACTS/STS 2024) based on?
This algorithm is based on EACTS/STS 2024 Aortic Guidelines - Type B Dissection (DOI: 10.1016/j.athoracsur.2024.01.021).
What are the limitations of the Type B Aortic Dissection Management (EACTS/STS 2024)?
Known limitations include: TEVAR for uncomplicated TBAD still debated (INSTEAD, ADSORB trials); Optimal timing of intervention in subacute phase unclear; Definition of 'high-risk features' varies between guidelines; Medical management success varies by center. Individual patient factors may require deviation from these recommendations.
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