Left Atrial Appendage Occlusion Study II (LAAOSII)
Phase III Pilot Study - Left Atrial Appendage Occlusion Study
A pilot, multicentre randomized controlled study of surgical left atrial occlusion (LAA) in 50 patients with atrial fibrillation/flutter undergoing cardiac surgery requiring cardiopulmonary bypass with additional risk factors for late stroke.
Patients will be enrolled and randomized to undergo LAA exclusion and aspirin therapy or best medical therapy as per guidelines.
Main research questions:
- Can successful occlusion of the LAA be safely achieved by cut and sew or stapler techniques?
- In patients with atrial fibrillation with 2 or more risk factors for stroke, will removal of the left atrial appendage (LAA) and aspirin therapy reduce the risk of systemic embolic events and major bleeding compared to warfarin?
Aperçu de l'étude
Statut
Les conditions
Intervention / Traitement
Description détaillée
The number one cause of disability and the 3rd leading cause of death in patients with atrial fibrillation (AF) is stroke. Echocardiographic studies suggest that the predominant source of stroke in AF is the left atrial appendage (LAA). At present, there are no sufficiently powered trials to answer whether removal of the LAA can reduce the risk of systemic embolic events.
LAAOS pilot study will recruit 50 participants undergoing open-heart surgery in 5 Canadian academic cardiac surgery centers. The study will inform the feasibility of conducting a large RCT and will provide information of the efficacy and safety of appendage occlusion technique. From this study we envision a a large international randomized controlled trial (LAAOS II) to determine the impact of left atrial appendage occlusion on the composite outcome of stroke and non-central nervous system systemic embolic events in at risk patients with atrial fibrillation undergoing cardiac surgery.
Type d'étude
Inscription (Réel)
Phase
- Phase 3
Contacts et emplacements
Lieux d'étude
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Ontario
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Hamilton, Ontario, Canada, L8L 2X2
- Hamilton General Hospital
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-
Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
Accepte les volontaires sains
Sexes éligibles pour l'étude
La description
Inclusion Criteria:
- Adult patients undergoing any cardiac surgical procedure with the use of cardiopulmonary bypass
A history of ECG-documented atrial fibrillation with prior stroke or TIA, or at least two of the following risk factors:
- age => 65 years
- hypertension
- diabetes mellitus, or
- heart failure/left ventricular ejection fraction < 50%
Exclusion Criteria:
- Patients in whom surgical AF ablation (MAZE or otherwise) is planned
- Planned "off-pump" surgery
- Planned implantation of a mechanical valve
- Heart transplant, complex congenital heart surgery, and ventricular assist device insertion, reoperation
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: La prévention
- Répartition: Randomisé
- Modèle interventionnel: Affectation parallèle
- Masquage: Aucun (étiquette ouverte)
Armes et Interventions
Groupe de participants / Bras |
Intervention / Traitement |
|---|---|
|
Expérimental: Occlusion arm
Surgical intervention: Occlusion of the left atrial appendage (LAA) using 'cut-and-sew' technique appendage occlusion.
|
Study intervention: Within the trial, occlusion must be performed using either amputation and closure (cut and sew) or stapler device.
|
|
Comparateur actif: Medical arm
Medical arm: The comparator is best medical practice for atrial fibrillation related stroke prevention as per guidelines.
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Best medical practice for atrial fibrillation related stroke prevention as per guidelines.
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Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Délai |
|---|---|
|
Demonstration of efficacy of cut-and-sew and stapler technique of appendage occlusion by intraoperative transesophageal echocardiography, central adjudication.
Délai: Outcomes will be measured at discharge, 4-8 weeks post-op and long term (1 to 4 years)
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Outcomes will be measured at discharge, 4-8 weeks post-op and long term (1 to 4 years)
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Mesures de résultats secondaires
Mesure des résultats |
Délai |
|---|---|
|
Demonstration of study feasibility, procedure safety, including rate of post-operative re-exploration for bleeding.
Délai: Outcomes will be measured at discharge, 4-8 weeks post-op and long term (1 to 4 years)
|
Outcomes will be measured at discharge, 4-8 weeks post-op and long term (1 to 4 years)
|
Collaborateurs et enquêteurs
Parrainer
Collaborateurs
Les enquêteurs
- Chercheur principal: Richard Whitlock, MD, FRCSC, McMaster University
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude
Achèvement primaire (Réel)
Achèvement de l'étude (Réel)
Dates d'inscription aux études
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première publication (Estimation)
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Estimation)
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Plus d'information
Termes liés à cette étude
Mots clés
Termes MeSH pertinents supplémentaires
Autres numéros d'identification d'étude
- LAAOSII
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