- ICH GCP
- Registre américain des essais cliniques
- Essai clinique NCT07709780
Apixaban Versus Warfarin for Left Ventricular Thrombus (APEX)
Apixaban vs. Warfarin in Left Ventricular Thrombus: A Randomized, Noninferiority Trial
Left ventricular thrombus is a blood clot that forms in the left ventricle and is associated with risk of systemic embolism and ischemic stroke. Warfarin has historically been used for anticoagulation in this condition, but it requires frequent international normalized ratio monitoring and is affected by dietary and drug interactions. Apixaban is a direct oral factor Xa inhibitor with fixed dosing and no routine anticoagulation monitoring requirement, and it is increasingly used in clinical practice for left ventricular thrombus, although definitive randomized evidence remains limited.
This randomized, noninferiority trial will compare apixaban with warfarin for treatment of left ventricular thrombus. Eligible adults with recently confirmed left ventricular thrombus will be randomized 1:1 to apixaban or warfarin. The primary endpoint is complete left ventricular thrombus resolution at 3 months assessed by cardiac magnetic resonance imaging. Participants will be followed through 12 months for thrombus-related, bleeding, cardiovascular, and mortality outcomes.
Aperçu de l'étude
Statut
Les conditions
Intervention / Traitement
Type d'étude
Inscription (Estimé)
Phase
- Phase 3
Contacts et emplacements
Coordonnées de l'étude
- Nom: Tushar Acharya, MD, MPH
- Numéro de téléphone: 520-626-0968
- E-mail: tacharya@arizona.edu
Lieux d'étude
-
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Arizona
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Tucson, Arizona, États-Unis, 85724
- Recrutement
- Banner University Medical Center - Tucson
-
Chercheur principal:
- Tushar Acharya, MD, MPH
-
Chercheur principal:
- Song Peng Ang, MD
-
Chercheur principal:
- Alane Blythe C Dy, PhD, MSPH
-
-
Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
- Adulte
- Adulte plus âgé
Accepte les volontaires sains
La description
Inclusion Criteria:
- Age ≥18 years
- LV thrombus confirmed within 14 days prior to randomization by CMR or contrast TTE or cardiac CT; baseline CMR required pre-randomization (or ≤7 days post-randomization if clinically unavoidable)
- Candidate for oral anticoagulation for ≥3 months
- Able to provide informed consent.
Exclusion Criteria:
- Absolute indication for VKA (mechanical valve, moderate-severe rheumatic MS and antiphospholipid syndrome) or clear preference or contraindication for one of the study drugs precluding randomization (see below)
- Antiphospholipid syndrome
- Estimated CrCl <15 mL/min or dialysis
- Severe hepatic impairment (ICD-10: K70.40, K70.41, K71.10, K71.11, K72.00, K72.01, K72.10, K72.11, K72.90, K72.91)
- Active clinically significant bleeding
- Platelets <50,000/µL
- Pregnancy or lactation; women of childbearing potential unwilling to use contraception
- Life expectancy <1 year or other conditions compromising follow-up
Additional contraindications to use of warfarin or apixaban. This includes, but is not limited to:
- Active pathological bleeding, major bleeding diathesis, or known blood dyscrasia
- Recent or planned surgery involving the central nervous system or eye, traumatic surgery with large open surfaces, or procedures (spinal/epidural puncture or major regional block anesthesia) where bleeding cannot be safely controlled.
- Conditions associated with high risk of bleeding such as threatened abortion, eclampsia, severe preeclampsia, or malignant/uncontrolled hypertension.
- History of severe hypersensitivity or allergy to warfarin or apixaban.
- Ongoing treatment with a combined P-gp and strong CYP3A4 inhibitor or inducer that cannot be safely discontinued or substituted. Examples include strong combined inhibitors such as ketoconazole, itraconazole, ritonavir or posiconazole, and strong combined inducers such as rifampin, carbamazepine, phenytoin, and St. John's wort.
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: Traitement
- Répartition: Randomisé
- Modèle interventionnel: Affectation parallèle
- Masquage: Aucun (étiquette ouverte)
Armes et Interventions
Groupe de participants / Bras |
Intervention / Traitement |
|---|---|
|
Expérimental: Apixaban
Participants randomized to apixaban will receive oral apixaban for treatment of left ventricular thrombus according to standard clinical dosing and follow-up.
|
Apixaban 5 mg orally twice daily
|
|
Comparateur actif: Warfarin
Participants randomized to warfarin will receive oral dose-adjusted warfarin for treatment of left ventricular thrombus according to standard clinical care.
|
Warfarin will be prescribed with dose adjustment to maintain INR 2.0-3.0.
|
Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
|
Complete Left Ventricular Thrombus Resolution at 3 Months
Délai: 3 months after randomization
|
Proportion of participants with complete resolution of left ventricular thrombus at 3 months, assessed by cardiac magnetic resonance imaging.
The primary noninferiority comparison will use the absolute between-group difference in the proportion of participants with complete thrombus resolution, apixaban minus warfarin.
|
3 months after randomization
|
Mesures de résultats secondaires
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
|
Major Bleeding
Délai: 6 months
|
Proportion of participants with major bleeding defined as BARC type 3 or 5 bleeding.
|
6 months
|
|
Change in LV Thrombus Volume
Délai: Baseline to 3, 6, or 12 months
|
Change in thrombus volume assessed by CMR
|
Baseline to 3, 6, or 12 months
|
|
Left Ventricular Remodeling
Délai: Baseline to 3, 6,12 months
|
Change in left ventricular ejection fraction and left ventricular volumes on follow-up imaging.
|
Baseline to 3, 6,12 months
|
|
Recurrent LV Thrombus
Délai: 12 months
|
Proportion of participants with recurrent LV thrombus after documented resolution.
|
12 months
|
|
Ischemic Stroke
Délai: 12 months
|
Proportion of participants with ischemic stroke.
|
12 months
|
|
Systemic embolism
Délai: 12 months
|
Proportion of participants with systemic embolism
|
12 months
|
|
Cardiovascular Mortality
Délai: 12 months
|
Proportion of participants with cardiovascular death.
|
12 months
|
|
All-Cause Mortality
Délai: 12 months
|
Proportion of participants with death from any cause.
|
12 months
|
Collaborateurs et enquêteurs
Parrainer
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude (Estimé)
Achèvement primaire (Estimé)
Achèvement de l'étude (Estimé)
Dates d'inscription aux études
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première publication (Réel)
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Réel)
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Plus d'information
Termes liés à cette étude
Termes MeSH pertinents supplémentaires
- Troubles cérébrovasculaires
- Maladies du cerveau
- Maladies du système nerveux central
- Maladies du système nerveux
- Maladies vasculaires
- Maladies cardiovasculaires
- Accident vasculaire cérébral
- Composés hétérocycliques, 1 anneau
- Composés hétérocycliques
- Composés hétérocycliques, 2 anneaux
- Composés hétérocycliques, anneau fusionné
- Pyrans
- Coumarines
- Benzopyrans
- 4-hydroxycoumarines
- Warfarine
- apixaban
Autres numéros d'identification d'étude
- STUDY00007421
Plan pour les données individuelles des participants (IPD)
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Informations sur les médicaments et les dispositifs, documents d'étude
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