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DECAAF: Delayed-Enhancement MRI (DE-MRI) Determinant of Successful Radiofrequency Catheter Ablation of Atrial Fibrillation (DECAAF)

1 giugno 2017 aggiornato da: Nassir F. Marrouche, MD, University of Utah

DECAAF: DE-MRI Determinant of Successful Radiofrequency Catheter Ablation of Atrial Fibrillation

This is a multi-center, observational, 1-year prospective cohort study (1 year follow-up, at 3, 6 and 12 month) with approximately 675 participants. We will conduct a thorough outcomes assessment utilizing data from Magnetic Resonance Imaging (MRI) scans, as well as pre-procedure and follow-up data. Scans will be blinded to location of participating site. MRI scans will be sequenced and analyzed as they arrive from the database.

Imaging Protocol: All patients will undergo a Delayed-Enhancement MRI (DE-MRI) within 30 days prior to the atrial fibrillation (AF) ablation procedure. The purpose of the initial MRI is to quantify the degree of atrial structural remodeling or fibrosis pre-ablation. Following ablation, DE-MRI will be obtained at 3, 6, and 12 months follow-up to detect and quantify ablation-related scar formation.

Clinical Follow-up: The institution where the ablation was performed will continue post-procedural care following standard of care procedures.

Atrial arrhythmia recurrences will be catalogued up to one year post-ablation and predictors of recurrences of AF will be determined by statistical analysis. The specific mechanism and electrophysiological characteristics of atrial arrhythmia recurrence will also be analyzed.

Our hypotheses are (1) DE-MRI will reproducibly stage the progression left atrium fibrosis in AF; (2) DE-MRI will reproducibly aid in quantifying and identifying the distribution of catheter ablation-related scarring in the left atrium; and (3) the stage of left atrium fibrosis pre-ablation and the amount and location of scarring will predict success of catheter ablation therapy for AF.

Panoramica dello studio

Stato

Completato

Condizioni

Intervento / Trattamento

Descrizione dettagliata

Atrial fibrillation (AF) is an electrophysiological condition characterized by a disorganized electrical activity in the atria of the heart. AF is associated with structural heart disease including hypertension, systolic and diastolic ventricular dysfunction and valvular heart disease. It represents a significant public health problem with the increasing longevity of the general population. A major determinant of the progression of AF is structural remodeling or fibrosis that occurs in the left atrium. A more extensively remodeled atrium represents the substrate needed for the arrhythmia to persist. Structural remodeling is also a major determinant for success of rhythm control strategies in AF. While catheter ablation has been reproducibly shown to be superior to anti-arrhythmic drug therapy for rhythm control in AF, the success of this procedure is significantly affected by the extent of structural remodeling present at the time of catheter ablation.

Delayed-Enhancement Magnetic Resonance Imaging (DE-MRI) has been demonstrated to be a very effective modality in identifying fibrotic and scarred cardiac tissue with excellent correlation with autopsy findings. This is related to the characteristics of Gadolinium, an extracellular contrast agent that is very effective in identifying regions of fibrotic non-viable myocardium. DE-MRI technology can be a very powerful, non-invasive method, of identifying the extent and the distribution of structural remodeling or fibrosis associated with AF.

Applying DE-MRI technology to the atrium causes significant technical challenges. The atrial wall is often a few millimeters thick which requires high spatial resolution to obtain adequate and useful images. In addition, image acquisition has to be gated to the diastolic phase of the atrial contraction cycle, which may be difficult to do when the patient is in AF. The ongoing research at the University of Utah has shown significant progress and very promising results overcoming the challenges mentioned. Specific image acquisition sequences have allowed for reproducible identification of high pixel intensity regions within the 2-dimensional images of the atrial wall. Three-dimensional reconstruction of the entire left atrium then provides a quantification of the overall volume occupied by these hyper-enhanced regions relative to the entire left atrial wall volume. Used prior to catheter ablation, DE-MRI can therefore identify regions of significant structural remodeling or fibrosis. The same technology has also been shown to be very useful in examining the amount and distribution of ablation related scarring.

Clinical patient characteristics will be collected for this study from clinic visits and chart reviews.

Imaging Protocol: All patients will undergo a DE-MRI within 30 days prior to the AF ablation procedure using a DE-MRI protocol. The purpose of the initial MRI is to quantify the degree of atrial structural remodeling or fibrosis pre-ablation. Following ablation, DE-MRI will be obtained at 3, 6, and 12 months follow-up to detect and quantify ablation-related scar formation (Figs. 4-5).

Clinical Follow-up: The institution where the ablation was performed will continue post-procedural care following standard of care procedures. Monitoring and definition of atrial arrhythmia AF recurrences will be guided by the HRS consensus document on ablation of atrial fibrillation.

Clinical and MRI data will be stored using the IRB-approved University of Utah database. De-identified clinical data and MRI images from participating institutions will also be submitted to the database, and will be processed at the University of Utah for pre- and post-ablation fibrosis and scar quantification. The ablation strategy utilized and procedural endpoint will be left to the discretion of the operators at the participating sites. This data will also be collected and included in the final analysis. MRI image processors at the University of Utah will be blinded to the ablation technique and mother institution using a unique de-identified study participant ID number.

Atrial arrhythmia recurrences will be catalogued up to one year post-ablation and predictors of recurrences determined by multivariate/survival analysis. The specific mechanism and electrophysiological characteristics of atrial arrhythmia recurrence will also be analyzed.

Tipo di studio

Osservativo

Iscrizione (Effettivo)

339

Contatti e Sedi

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

Luoghi di studio

  • Australia
    • South Australia
      • Norwood, South Australia, Australia, 5067
        • Royal Adelaide Hospital
  • Belgio
      • Ghent, Belgio, 9000
        • Universitair Ziekenhuis Ghent
  • Francia
      • Bordeaux, Francia, 33604
        • Hôpital Cardiologique du Haut-Lévêque/Bordeaux
  • Germania
      • Bad Nauheim, Germania, 61231
        • Kerckhoff Klinik
      • Coburg, Germania, 96450
        • Coburg Klinik
      • Cologne, Germania
        • Institut für Diagnostische und Interventionelle Radiologie - koln
      • Hamburg, Germania, 20099
        • Asklepios Klinik St. Georg
      • Leipzig, Germania, 04103
        • Universitätsklinikum Leipzig
  • Olanda
      • Nieuwegein, Olanda, 3430
        • St Antonius Ziekenhuis Hospital
  • Spagna
    • Catalonia
      • Barcelona, Catalonia, Spagna, 08036
        • Hospital Clínic de Barcelona
  • Stati Uniti
    • Florida
      • Tampa, Florida, Stati Uniti, 33606
        • Florida Heart Rhythm Institute
    • Illinois
      • Chicago, Illinois, Stati Uniti, 60153
        • Loyola University Medical Center
    • Ohio
      • Columbus, Ohio, Stati Uniti, 43210
        • Ohio State University Medical Center
    • Pennsylvania
      • Philadelphia, Pennsylvania, Stati Uniti, 19104
        • University of Pennsylvania Hospital
    • Tennessee
      • Nashville, Tennessee, Stati Uniti, 37203
        • Sarah Cannon Research Institute (Centennial)

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

18 anni e precedenti (Adulto, Adulto più anziano)

Accetta volontari sani

No

Sessi ammissibili allo studio

Tutto

Metodo di campionamento

Campione non probabilistico

Popolazione di studio

The study population will consist of those patients who have undergone catheter ablation for atrial fibrillation.

Descrizione

Inclusion Criteria:

  • Patients who underwent an AF ablation as per recent Heart Rhythm Society (HRS) consensus document, as per the University of Utah AFIB Database (IRB_00020347)
  • Patients who have had an MRI post-ablation.
  • Age ≥18 years.

Exclusion Criteria:

  • Contraindication for DE-MRI with a full dose of Gadolinium-based contrast agent.
  • Previous left atrial ablation or surgical procedure
  • Renal failure with CrCl <60 ml/min
  • Women currently pregnant, breastfeeding, or of childbearing age not currently taking or not willing to use a reliable form of contraception
  • Mental or physical inability to take part in the study
  • Uncontrolled hypertension
  • Morbid obesity (BMI > 35), or inability to be placed in MRI due to body mass.
  • Patients who have not had a DE-MRI post-ablation.

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
Intervento / Trattamento
DE-MRI
All patients will undergo Delayed-Enhancement Magnetic Resonance Imaging (DE-MRI)to quantify the degree of atrial structural remodeling or fibrosis pre-ablation and DE-MRI will be obtained at 3, 6, and 12 months follow-up to detect and quantify ablation-related scar formation.
Procedura: DE-MRI
Using Delayed-Enhancement Magnetic Resonance Imaging (DE-MRI) to identify fibrotic and scarred cardiac tissue. DE-MRI is a non-invasive method of identifying the extent and the distribution of structural remodeling or fibrosis and scarring associated with atrial fibrillation both pre- and post-ablation.

Cosa sta misurando lo studio?

Misure di risultato primarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Relationship between extent of pre-ablation fibrosis and recurrence post-ablation
Lasso di tempo: 1 year
The percentage of pre-ablation fibrosis in atrial fibrillation patients can significantly impact the incidence of recurrences post-ablation.
1 year

Misure di risultato secondarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Relationship between extent of Post-ablation scar and incidence of atrial fibrillation recurrences post-catheter ablation for AF
Lasso di tempo: Post-ablation scar
The extent of lesions created by ablation may have an impact on the incidence of recurrence of AF post-ablation
Post-ablation scar

Collaboratori e investigatori

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

Sponsor

University of Utah

Investigatori

  • Investigatore principale: Nassir F Marrouce, MD, FHRS, CARMA Center, University of Utah

Pubblicazioni e link utili

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Pubblicazioni generali

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

1 luglio 2010

Completamento primario (Effettivo)

1 giugno 2012

Completamento dello studio (Effettivo)

1 settembre 2012

Date di iscrizione allo studio

Primo inviato

22 giugno 2010

Primo inviato che soddisfa i criteri di controllo qualità

23 giugno 2010

Primo Inserito (Stima)

24 giugno 2010

Aggiornamenti dei record di studio

Ultimo aggiornamento pubblicato (Effettivo)

2 giugno 2017

Ultimo aggiornamento inviato che soddisfa i criteri QC

1 giugno 2017

Ultimo verificato

1 giugno 2017

Maggiori informazioni

Termini relativi a questo studio

Parole chiave

Termini MeSH pertinenti aggiuntivi

Altri numeri di identificazione dello studio

  • IRB_00039522

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 .

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