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- Klinische proef 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.
Studie Overzicht
Toestand
Conditie
Interventie / Behandeling
Studietype
Inschrijving (Geschat)
Fase
- Fase 3
Contacten en locaties
Studiecontact
- Naam: Tushar Acharya, MD, MPH
- Telefoonnummer: 520-626-0968
- E-mail: tacharya@arizona.edu
Studie Locaties
-
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Arizona
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Tucson, Arizona, Verenigde Staten, 85724
- Werving
- Banner University Medical Center - Tucson
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Hoofdonderzoeker:
- Tushar Acharya, MD, MPH
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Hoofdonderzoeker:
- Song Peng Ang, MD
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Hoofdonderzoeker:
- Alane Blythe C Dy, PhD, MSPH
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-
Deelname Criteria
Geschiktheidscriteria
Leeftijden die in aanmerking komen voor studie
- Volwassen
- Oudere volwassene
Accepteert gezonde vrijwilligers
Beschrijving
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.
Studie plan
Hoe is de studie opgezet?
Ontwerpdetails
- Primair doel: Behandeling
- Toewijzing: Gerandomiseerd
- Interventioneel model: Parallelle opdracht
- Masker: Geen (open label)
Wapens en interventies
Deelnemersgroep / Arm |
Interventie / Behandeling |
|---|---|
|
Experimenteel: Apixaban
Participants randomized to apixaban will receive oral apixaban for treatment of left ventricular thrombus according to standard clinical dosing and follow-up.
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Apixaban 5 mg orally twice daily
|
|
Actieve vergelijker: Warfarin
Participants randomized to warfarin will receive oral dose-adjusted warfarin for treatment of left ventricular thrombus according to standard clinical care.
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Warfarin will be prescribed with dose adjustment to maintain INR 2.0-3.0.
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Wat meet het onderzoek?
Primaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
|
Complete Left Ventricular Thrombus Resolution at 3 Months
Tijdsspanne: 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
|
Secundaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
|
Major Bleeding
Tijdsspanne: 6 months
|
Proportion of participants with major bleeding defined as BARC type 3 or 5 bleeding.
|
6 months
|
|
Change in LV Thrombus Volume
Tijdsspanne: Baseline to 3, 6, or 12 months
|
Change in thrombus volume assessed by CMR
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Baseline to 3, 6, or 12 months
|
|
Left Ventricular Remodeling
Tijdsspanne: 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
Tijdsspanne: 12 months
|
Proportion of participants with recurrent LV thrombus after documented resolution.
|
12 months
|
|
Ischemic Stroke
Tijdsspanne: 12 months
|
Proportion of participants with ischemic stroke.
|
12 months
|
|
Systemic embolism
Tijdsspanne: 12 months
|
Proportion of participants with systemic embolism
|
12 months
|
|
Cardiovascular Mortality
Tijdsspanne: 12 months
|
Proportion of participants with cardiovascular death.
|
12 months
|
|
All-Cause Mortality
Tijdsspanne: 12 months
|
Proportion of participants with death from any cause.
|
12 months
|
Medewerkers en onderzoekers
Sponsor
Studie record data
Bestudeer belangrijke data
Studie start (Geschat)
Primaire voltooiing (Geschat)
Studie voltooiing (Geschat)
Studieregistratiedata
Eerst ingediend
Eerst ingediend dat voldeed aan de QC-criteria
Eerst geplaatst (Werkelijk)
Updates van studierecords
Laatste update geplaatst (Werkelijk)
Laatste update ingediend die voldeed aan QC-criteria
Laatst geverifieerd
Meer informatie
Termen gerelateerd aan deze studie
Aanvullende relevante MeSH-voorwaarden
- Cerebrovasculaire aandoeningen
- Hersenziekten
- Ziekten van het centrale zenuwstelsel
- Ziekten van het zenuwstelsel
- Vaatziekten
- Hart-en vaatziekten
- Hartinfarct
- Heterocyclische verbindingen, 1-ring
- Heterocyclische verbindingen
- Heterocyclische verbindingen, 2-ring
- Heterocyclische verbindingen, gefuseerd ring
- Pyrans
- Coumarins
- Benzopyrans
- 4-hydroxycoumarins
- Warfarine
- Apixaban
Andere studie-ID-nummers
- STUDY00007421
Plan Individuele Deelnemersgegevens (IPD)
Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?
Informatie over medicijnen en apparaten, studiedocumenten
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