Effect of Pretreatment With Ticagrelor on Residual Thrombus After PCI in Patients Presenting With ACS in Comparison With Delayed Treatment at the Time of PCI: an OCT Study
Effect of Pretreatment With Ticagrelor on Residual Thrombus After Percutaneous Coronary Intervention (PCI) in Patients Presenting With Acute Coronary Syndrome in Comparison With Delayed Treatment at the Time of PCI: an Optical Coherence Tomography Study
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Undersøgelsestype
Undersøgelsestype
Fase
Fase
- Fase 4
Kontakter og lokationer
Studiesteder
-
-
Massachusetts
-
Boston, Massachusetts, Forenede Stater, 02114
- Massachusetts General Hospital
-
-
Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Beskrivelse
Inclusion Criteria:
Patient Characteristics:
- Males and non-pregnant females > or equal to 18 and < or equal to 79 years of age presenting with suspected acute coronary syndrome (unstable angina or NSTEMI)
- Patients likely to be scheduled to undergo coronary angiography with possible percutaneous coronary intervention (PCI)
Lesion Characteristics on Diagnostic Coronary Angiography:
- De novo lesions in native coronary arteries found by diagnostic coronary angiography
- Angiographic stenosis <100%
- Reference vessel diameter 2.5 mm - 4.0 mm by visual estimation
Exclusion Criteria:
Patient Specific Exclusion Criteria:
- Subjects who are unable or unwilling to sign the informed consent form.
- Subjects being treated with anti-platelet medications other than aspirin prior to diagnostic catheterization including glycoprotein IIb/IIIa inhibitors.
- Subjects with serious co-morbid conditions that in judgment of the investigator preclude inclusion in this study
- Subjects with NYHA class III or IV heart failure or known left ventricular ejection fraction < 30%.
- Subjects with an ST elevation myocardial infarction.
- Subjects with hemodynamic or electrical instability (including shock).
- Subjects diagnosed with severe, non-catheter-related coronary artery spasm.
- Subjects who are or may be pregnant.
- Subjects with known allergies to contrast media.
- Subjects with eGFR < 60 ml/min/1.73m2.
- Subjects currently taking oral anticoagulants with an absolute contraindication to discontinuation of anticoagulation.
- History of TIA or stroke < 6 months.
- History of hemorrhagic stroke.
- Hepatic insufficiency defined as liver cirrhosis, AST/ALT/Alkaline Phosphatase greater than 3 times the upper limit of normal or hyperbilirubinemia.
- Cardiac catheterization scheduled within 4 hours of randomization or more then 72 hours after randomization.
Lesion Specific Exclusion Criteria. These exclusion criteria apply to the target lesion to be imaged by OCT.
- Lesions located in the left main coronary artery
- Lesions that are heavily calcified
- Lesions where OCT cannot be performed due to technical difficulties
- Other lesions that the investigator deems inappropriate for the procedure such as sites with excessive tortuosity or low flow by TIMI grade.
- Lesions in saphenous vein grafts or arterial conduits.
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Tildeling: Randomiseret
- Interventionel model: Parallel tildeling
- Maskning: Enkelt
Antal våben
Våben og indgreb
Deltagergruppe / ArmDeltagergruppe / Arm |
Intervention / BehandlingIntervention / Behandling |
|---|---|
|
Aktiv komparator: Ticagrelor- Delayed Administration
Subjects receive 180 mg of ticagrelor during cardiac catheterization after diagnostic angiography and prior to stenting.
OCT is performed prior to and after coronary artery stenting.
|
Subjects are randomized to receive ticagrelor immediately after enrollment versus at the time of cardiac catheterization.
OCT is performed prior to and after coronary artery stenting.
|
|
Aktiv komparator: Ticagrelor- Immediate Administration
Subjects receive 180 mg of ticagrelor immediately after study enrollment.
OCT is performed prior to and after coronary artery stenting.
|
Subjects are randomized to receive ticagrelor immediately after enrollment versus at the time of cardiac catheterization.
OCT is performed prior to and after coronary artery stenting.
|
Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Total trombebyrde målt ved volumen af in-stent trombe kvantificeret ved planimetri.
Tidsramme: Trombebelastningen vil blive målt ved slutningen af koronararteriestentingproceduren.
|
Den samlede trombebelastning målt på OCT-billeder vil blive vurderet.
Volumenet af in-stent thrombus vil blive kvantificeret ved planimetri.
|
Trombebelastningen vil blive målt ved slutningen af koronararteriestentingproceduren.
|
Sekundære resultatmål
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
PRI (platelet reactivity index) as measured bu the PLT-VASP assay.
Tidsramme: PRI iwill be measured at the time of OCT image acquisition.
|
The extent of platelet inhibition will be measured by PLT-VASP and VerifyNow P2Y12 assays.
|
PRI iwill be measured at the time of OCT image acquisition.
|
|
P2Y12 Reaction Units as measured by the VerifyNow P2Y12 assay.
Tidsramme: P2Y12 will be measured at the time of OCT image acquisition.
|
The extent of platelet inhibition will be measured by PLT-VASP and VerifyNow P2Y12 assays.
|
P2Y12 will be measured at the time of OCT image acquisition.
|
Andre resultatmål
Andre resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
PCI-related myocardial infarction (MI)
Tidsramme: PCI-related MI will be assesed within 24 hours after the end of the coronary artery stenting procedure.
|
PCI related myocardial infarction is defined by the third Universal definition of myocardial infarction.
|
PCI-related MI will be assesed within 24 hours after the end of the coronary artery stenting procedure.
|
Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Samarbejdspartnere
Samarbejdspartnere
Datoer for undersøgelser
Studer store datoer
Studiestart
Studiestart
Primær færdiggørelse (Forventet)
Primær færdiggørelse
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Skøn)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Skøn)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Yderligere relevante MeSH-vilkår
- Patologiske processer
- Myokardieiskæmi
- Hjertesygdomme
- Hjerte-kar-sygdomme
- Karsygdomme
- Åreforkalkning
- Arterielle okklusive sygdomme
- Sygdom
- Koronar sygdom
- Koronararteriesygdom
- Syndrom
- Akut koronarsyndrom
- Lægemidlers fysiologiske virkninger
- Neurotransmittermidler
- Molekylære mekanismer for farmakologisk virkning
- Blodpladeaggregationshæmmere
- Purinerge P2Y-receptorantagonister
- Purinerge P2-receptorantagonister
- Purinerge antagonister
- Purinerge midler
- Ticagrelor
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- 2013P001322
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