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Coronary Access After Evolut FX Plus TAVI: Impact of Commissural Alignment and the Large-Cell Frame Design: ACCESS-FX+ Registry

7 settembre 2026 aggiornato da: Yonsei University

The ACCESS-FX+ Registry is a prospective, multicenter, single-arm study designed to evaluate the feasibility of coronary access after transcatheter aortic valve implantation (TAVI) using the Evolut FX Plus transcatheter heart valve in patients with severe aortic stenosis.

TAVI has become an established treatment for patients with severe aortic stenosis across a broad range of surgical risk profiles. As TAVI is increasingly performed in younger patients with longer life expectancy, maintaining access to the coronary arteries after transcatheter heart valve implantation has become an important clinical consideration. A substantial proportion of patients undergoing TAVI have concomitant coronary artery disease and may subsequently require coronary angiography or percutaneous coronary intervention. However, coronary access after TAVI may be challenging because of the spatial relationship between the transcatheter heart valve frame, commissural posts, valve leaflets, and coronary ostia.

Commissural alignment between the native aortic valve and the implanted transcatheter heart valve may play an important role in preserving coronary access. Commissural misalignment may result in a commissural post or valve leaflet being positioned in front of a coronary ostium, potentially interfering with subsequent selective coronary cannulation. In addition to commissural alignment, the geometry and orientation of the transcatheter valve frame relative to the coronary ostia may influence the feasibility of coronary re-access.

The Evolut FX Plus transcatheter heart valve incorporates three enlarged frame cells designed to facilitate coronary access. This modification is intended to increase the likelihood that at least one large cell is favorably positioned relative to each coronary ostium. However, prospective data evaluating selective coronary cannulation through these large cells and the relationship between large-cell orientation, commissural alignment, and coronary anatomy in clinical practice remain limited.

The study will enroll approximately 122 patients aged 65 years or older with severe aortic stenosis undergoing TAVI with the Evolut FX Plus valve. Immediately after valve implantation, selective cannulation of the left and right coronary arteries through the large-cell frame will be attempted using standard diagnostic coronary catheters. The primary endpoint is the successful selective coronary cannulation rate through the Evolut FX Plus large-cell frame, assessed separately for the left and right coronary arteries. Successful selective coronary cannulation is defined as stable engagement of a diagnostic catheter at the coronary ostium allowing coronary contrast injection.

Cardiac computed tomography (CT) performed 3 to 6 months after TAVI will provide a detailed assessment of the spatial relationship between the implanted transcatheter heart valve and the coronary ostia. CT-based assessments will include large cell-to-coronary alignment, alignment between the center of the transcatheter valve leaflet and the coronary ostium, and commissural alignment between the native and transcatheter aortic valves. Follow-up CT will also be used to evaluate findings of valve thrombosis, including leaflet, supravalvular, subvalvular, and sinus hypoattenuation.

Panoramica dello studio

Stato

Non ancora reclutamento

Condizioni

Descrizione dettagliata

TAVI will be performed according to standard clinical practice. A commissural alignment technique will be used during valve implantation, with appropriate orientation of the delivery system and fluoroscopic assessment during valve deployment.

Immediately after valve implantation, selective coronary cannulation of the left coronary artery and right coronary artery through the Evolut FX Plus large-cell frame will be attempted using standard diagnostic coronary catheters. The primary endpoint is the successful selective coronary cannulation rate through the large-cell frame, assessed separately for the left and right coronary arteries. Successful selective coronary cannulation is defined as stable engagement of the diagnostic catheter at the coronary ostium allowing coronary contrast injection.

Cardiac CT performed 3 to 6 months after TAVI will be analyzed to assess the spatial relationship between the implanted valve and the coronary ostia. CT-based assessments will include large cell-to-coronary alignment, alignment between the center of the transcatheter valve leaflet and the coronary ostium, commissural alignment between the native and transcatheter aortic valves, and findings of valve thrombosis, including leaflet, supravalvular, subvalvular, and sinus hypoattenuation.

Clinical efficacy and safety outcomes will be assessed at 30 days and 6 months. Clinical events will be defined according to Valve Academic Research Consortium-3 (VARC-3) criteria where applicable.

Tipo di studio

Osservativo

Iscrizione (Stimato)

122

Contatti e Sedi

Questa sezione fornisce i recapiti di coloro che conducono lo studio e informazioni su dove viene condotto lo studio.

Contatto studio

  • Nome: Young-Guk Ko, Professor
  • Numero di telefono: +82-2-2228-8460
  • Email: ygko@yuhs.ac

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 più anziano

Accetta volontari sani

No

Metodo di campionamento

Campione non probabilistico

Popolazione di studio

Patients with severe aortic stenosis undergoing TAVI with the Evolut FX Plus transcatheter heart valve.

Descrizione

Inclusion Criteria:

  1. Patients with severe aortic stenosis undergoing TAVI with the Evolut FX Plus transcatheter heart valve.
  2. Age ≥65 years.
  3. Ability and willingness to provide written informed consent for participation in the study.

Exclusion Criteria:

  1. Inability to undergo contrast-enhanced cardiac CT before TAVI.
  2. Anomalous origin of a coronary artery.
  3. Bicuspid aortic valve.
  4. Previous surgical or transcatheter aortic valve replacement.
  5. Cardiogenic shock or hemodynamic instability.
  6. Chronic kidney disease stage 3b, 4, or 5, defined as estimated glomerular filtration rate (eGFR) <45 mL/min/1.73 m².
  7. Thrombocytopenia (platelet count <100,000/μL) or an increased bleeding risk precluding antiplatelet or anticoagulant therapy.
  8. Allergy or hypersensitivity to aspirin or clopidogrel precluding antiplatelet therapy in patients without an indication for oral anticoagulation.

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

Coorti e interventi

Gruppo / Coorte
Patients undergoing TAVI using Evolut FX Plus
Patients aged 65 years or older with severe aortic stenosis who are scheduled to undergo TAVI with the Evolut FX Plus transcatheter heart valve and who meet all eligibility criteria.

Cosa sta misurando lo studio?

Misure di risultato primarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Successful Selective Coronary Cannulation Through the Evolut FX Plus Large-Cell Frame
Lasso di tempo: Day 0 (Immediately after Evolut FX Plus implantation)
The proportion of patients in whom successful selective coronary cannulation is achieved through the Evolut FX Plus large-cell frame, assessed separately for the left coronary artery and right coronary artery. Successful selective coronary cannulation is defined as stable engagement of a standard diagnostic catheter at the coronary ostium allowing coronary contrast injection.
Day 0 (Immediately after Evolut FX Plus implantation)

Misure di risultato secondarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Technical Success
Lasso di tempo: 30 days after TAVI
Technical success following TAVI with the Evolut FX Plus valve, assessed according to the study protocol and applicable VARC-3 criteria.
30 days after TAVI
Devicel Success
Lasso di tempo: 30 days after TAVI
Device success following TAVI with the Evolut FX Plus valve, assessed according to the study protocol and applicable VARC-3 criteria.
30 days after TAVI
Clinical outcomes (Composite of All-Cause Mortality, All Stroke, or Procedure- or Valve-Related Hospitalization)
Lasso di tempo: 6 months after TAVI
Composite of All-Cause Mortality, All Stroke, or Procedure- or Valve-Related Hospitalization
6 months after TAVI
CT-based Secondary Outcome (Moderate or Greater Large Cell-to-Coronary Misalignment)
Lasso di tempo: 3 to 6 months after TAVI
1) Moderate or Greater Large Cell-to-Coronary Misalignment:: Proportion of patients with moderate or severe large cell-to-coronary misalignment on follow-up cardiac CT. Alignment is determined by the angle between the center of the large cell and the center of the coronary ostium.
3 to 6 months after TAVI
CT-based Secondary Outcome (Moderate or Greater Leaflet Center-to-Coronary Misalignment)
Lasso di tempo: 3 to 6 months after TAVI
  1. Moderate or Greater Leaflet Center-to-Coronary Misalignment:

    Proportion of patients with moderate or severe misalignment between the center axis of the transcatheter valve leaflet and the center of the coronary ostium on follow-up cardiac CT.

  2. Moderate or Greater Commissural Misalignment
3 to 6 months after TAVI
CT-based Secondary Outcome (Moderate or Greater Commissural Misalignment)
Lasso di tempo: 3 to 6 months after TAVI

Moderate or Greater Commissural Misalignment::

Proportion of patients with moderate or severe commissural misalignment between the native aortic valve commissures and the transcatheter heart valve commissures on follow-up cardiac CT.

3 to 6 months after TAVI

Collaboratori e investigatori

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

Sponsor

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)

29 settembre 2026

Completamento primario (Stimato)

30 settembre 2028

Completamento dello studio (Stimato)

31 marzo 2029

Date di iscrizione allo studio

Primo inviato

31 agosto 2026

Primo inviato che soddisfa i criteri di controllo qualità

7 settembre 2026

Primo Inserito (Effettivo)

10 settembre 2026

Aggiornamenti dei record di studio

Ultimo aggiornamento pubblicato (Effettivo)

10 settembre 2026

Ultimo aggiornamento inviato che soddisfa i criteri QC

7 settembre 2026

Ultimo verificato

1 settembre 2026

Maggiori informazioni

Termini relativi a questo studio

Altri numeri di identificazione dello studio

  • 1-2026-0038

Piano per i dati dei singoli partecipanti (IPD)

Hai intenzione di condividere i dati dei singoli partecipanti (IPD)?

NO

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 .