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Outcomes of Left Subclavian Artery Revascularization Strategies During Zone 2 Thoracic Endovascular Aortic Repair

10 luglio 2026 aggiornato da: Mohamed Tarek Mostafa, Assiut University

Intentional coverage of left subclavian artery (LSA) is often necessary during thoracic endovascular aortic repair (TEVAR) to secure an adequate proximal landing zone. However, this may impair blood flow to vital vascular territories with increased risk of stroke, spinal cord ischemia and upper limb ischemia.

Current recommendations from the Society for Vascular Surgery (SVS) and European Society for Vascular Surgery (ESVS) support the consideration of LSA revascularization in patients undergoing elective TEVAR with anticipated LSA coverage. In contrast, management in the acute setting is more complex and requires an individualized approach based on clinical urgency and anatomical factors. Revascularization is generally recommended in high-risk clinical scenarios, including patients with dominant left vertebral circulation, compromised or occluded contralateral vertebral artery, an incomplete circle of Willis, or variant vertebral anatomy such as a hypoplastic left vertebral artery terminating in the posterior inferior cerebellar artery or an isolated vertebral artery. Additional indications include prior LIMA grafting, the presence of upper limb dialysis access, anticipated extensive aortic coverage, or an aberrant right subclavian artery in which both subclavian origins may be compromised.

Revascularization techniques encompass both open surgical and endovascular approaches. Surgical options include carotid-subclavian bypass, carotid-axillary bypass, and subclavian transposition, while endovascular methods involve branched or fenestrated endografts, chimney and periscope grafts, as well as in situ fenestration. Although surgical techniques provide durable long-term patency, they are associated with a risk of local complications. Endovascular approaches are minimally invasive; however, they may be associated with an increased risk of endoleaks.

Anatomical factors also play a central role in determining both the feasibility and outcomes. Preoperative assessment using computed tomography angiography is essential to evaluate aortic arch morphology, proximal landing zone characteristics, branch vessel orientation, and access vessel suitability. In addition, the spatial relationship between the left common carotid artery (LCCA) and LSA, including minimum inter-vessel distances, directly influences the feasibility of branched or fenestrated endografts. Also branch vessel anatomy is equally critical, as LSA diameter, vertebral artery origin, and vessel length determine the suitability for branch incorporation or fenestration techniques. Furthermore, access-related anatomical constraints, particularly iliofemoral vessel diameter and calcification, may significantly limit device delivery.

Panoramica dello studio

Stato

Non ancora reclutamento

Condizioni

Intervento / Trattamento

Tipo di studio

Interventistico

Iscrizione (Stimato)

50

Fase

  • Non applicabile

Criteri di partecipazione

I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.

Criteri di ammissibilità

Età idonea allo studio

  • Adulto
  • Adulto più anziano

Accetta volontari sani

No

Descrizione

Inclusion Criteria:

Patients ≥18 years Undergoing TEVAR with proximal landing in zone 2 whether acute or chronic type B aortic dissection (TBAD), thoraco-abdominal aortic aneurysm (TAAA), penetrating aortic ulcer (PAU) or intramural hematoma (IMH).

• Treatment with one of the following:

  • Single-branched stent grafts
  • In-situ fenestration (e.g. ISLF ± stent)
  • Chimney/periscope graft techniques
  • Physician-modified endografts (PMEGs)
  • Carotid-subclavian bypass, carotid-axillary bypass, or subclavian transposition

Exclusion Criteria:

  • • Non revascularized left subclavian artery.

    • Zone 0 or 1 procedures
    • Multi-vessel arch debranching
    • Blunt traumatic aortic injury (BTAI)
    • Incomplete imaging or follow-up data

Piano di studio

Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.

Come è strutturato lo studio?

Dettagli di progettazione

  • Scopo principale: Trattamento
  • Assegnazione: Non randomizzato
  • Modello interventistico: Assegnazione parallela
  • Mascheramento: Separare

Armi e interventi

Gruppo di partecipanti / Arm
Intervento / Trattamento
Comparatore attivo: Surgery
Bypass
Carotid subclavian bypass
Comparatore attivo: Endovascular
Branched endograft
Carotid subclavian bypass

Cosa sta misurando lo studio?

Misure di risultato primarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Number of participants achieving technical success
Lasso di tempo: 30 days
Technical success is defined as successful stent graft deployment in the intended position with complete exclusion of the target aortic pathology, maintenance of left subclavian artery patency, absence of type I or III endoleak on completion angiography, and no intraoperative major adverse events (stroke, aortic rupture, or death). Results will be reported as the number and percentage of participants achieving technical success.
30 days
Number of participants experiencing perioperative complications or requiring reintervention
Lasso di tempo: 30 days
Perioperative outcomes include stroke, spinal cord ischemia, upper limb ischemia, myocardial infarction, access-related complications, aortic rupture, death, endoleak requiring treatment, and any unplanned surgical or endovascular reintervention occurring within 30 days after TEVAR. Results will be reported as the number and percentage of participants experiencing one or more events.
30 days

Misure di risultato secondarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Number of participants with primary left subclavian artery patency at 3 years
Lasso di tempo: 3 years
Primary left subclavian artery patency is defined as uninterrupted patency of the left subclavian artery without any surgical or endovascular reintervention during the 3-year follow-up period. Patency will be assessed by computed tomography angiography (CTA) or duplex ultrasound. The outcome will be reported as the number and percentage of participants with primary left subclavian artery patency.
3 years
Number of participants with assisted primary or secondary left subclavian artery patency
Lasso di tempo: 3 years
Assisted primary patency is defined as maintained LSA patency after an intervention performed before occlusion, while secondary patency is defined as restoration of flow after occlusion. Patency will be assessed by CTA or duplex ultrasound. Results will be reported as the number and percentage of participants maintaining assisted primary or secondary patency.
3 years
Number of participants requiring left subclavian artery reintervention
Lasso di tempo: 3 years
LSA-related reintervention includes any surgical or endovascular procedure performed to maintain assisted primary patency or restore secondary patency, including angioplasty, stenting, thrombectomy, bypass revision, or redo bypass. Results will be reported as the number and percentage of participants requiring one or more reinterventions.
3 years

Collaboratori e investigatori

Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.

Sponsor

Pubblicazioni e link utili

La persona responsabile dell'inserimento delle informazioni sullo studio fornisce volontariamente queste pubblicazioni. Questi possono riguardare qualsiasi cosa relativa allo studio.

Pubblicazioni generali

  • 1. Feezor RJ, Martin TD, Hess PJ, Klodell CT, Beaver TM, Huber TS, et al. Risk factors for perioperative stroke during thoracic endovascular aortic repairs (TEVAR). J Endovasc Ther. 2007 Aug;14(4):568-73. doi:10.1177/152660280701400420 PubMed PMID: 17696634. 2. Matsumura JS, Lee WA, Mitchell RS, Farber MA, Murad MH, Lumsden AB, et al. The Society for Vascular Surgery Practice Guidelines: management of the left subclavian artery with thoracic endovascular aortic repair. J Vasc Surg. 2009 Nov;50(5):1155-8. doi:10.1016/J.JVS.2009.08.090 PubMed PMID: 19878791. 3. Wanhainen A, Gombert A, Antoniou GA, Fidalgo Domingos LA, Gouveia e Melo R, Grabenwöger M, et al. European Society for Vascular Surgery (ESVS) 2026 Clinical Practice Guidelines on the Management of Descending Thoracic and Thoraco-Abdominal Aortic Diseases. European Journal of Vascular and Endovascular Surgery. 2025 Feb 1;71(2):172-270. doi:10.1016/J.EJVS.2025.12.050/ATTACHMENT/4919EBC3-7A5C-48FD-9138-D4C9AB08CE0D/MMC3.PDF PubMed PMID: 41448425. 4. Upchurch GR, Escobar GA, Azizzadeh A, Beck AW, Conrad MF, Matsumura JS, et al. Society for Vascular Surgery clinical practice guidelines of thoracic endovascular aortic repair for descending thoracic aortic aneurysms. J Vasc Surg. 2021 Jan 1;73(1):55S-83S. doi:10.1016/J.JVS.2020.05.076/ASSET/A831C192-C4DD-4DCB-9701-3DD23F180CA0/MAIN.ASSETS/GR2.JPG PubMed PMID: 32628988. 5. Lin F, He Z, Gao J, Huang X, Wang H, Han L, et al. Comparison of surgical and endovascular left subclavian artery revascularization during thoracic aortic endovascular repair: a systematic review and meta-analysis. Front Cardiovasc Med. 2023 Nov 2;10:1274629. doi:10.3389/FCVM.2023.1274629/TEXT 6. Scali ST, Chang CK, Pape SG, Feezor RJ, Berceli SA, Huber TS, et al. Subclavian revascularization in the age of thoracic endovascular aortic repair and comparison of outcomes in patients with occlusive disease. J Vasc Surg. 2013 Oct;58(4):901-9. doi:10.1016/J.JVS.2013.04.005 PubMed PMID: 23711694.

Studiare le date dei record

Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.

Studia le date principali

Inizio studio (Stimato)

1 ottobre 2026

Completamento primario (Stimato)

1 ottobre 2028

Completamento dello studio (Stimato)

1 dicembre 2028

Date di iscrizione allo studio

Primo inviato

24 giugno 2026

Primo inviato che soddisfa i criteri di controllo qualità

10 luglio 2026

Primo Inserito (Effettivo)

13 luglio 2026

Aggiornamenti dei record di studio

Ultimo aggiornamento pubblicato (Effettivo)

13 luglio 2026

Ultimo aggiornamento inviato che soddisfa i criteri QC

10 luglio 2026

Ultimo verificato

1 giugno 2026

Maggiori informazioni

Termini relativi a questo studio

Altri numeri di identificazione dello studio

  • TEVAR

Informazioni su farmaci e dispositivi, documenti di studio

Studia un prodotto farmaceutico regolamentato dalla FDA degli Stati Uniti

No

Studia un dispositivo regolamentato dalla FDA degli Stati Uniti

No

Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .