Tests d’évaluation de la réactivité plaquettaire

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Transcription de la présentation:

Tests d’évaluation de la réactivité plaquettaire POPULAR Tests d’évaluation de la réactivité plaquettaire Breet NJ et al. AHA 2009

Méthodologie (1) POPULAR Objectif Principe Etude Comparaison de 6 tests de fonction plaquettaire pour la prédiction du risque athérothrombotique sous l’effet d’une bithérapie AAP (aspirine + clopidogrel) après ATL + endoprothèses coronaires Principe Répartition en quintiles selon le niveau d’effet anti-agrégant plaquettaire Etude Étude prospective portant sur 1069 coronariens consécutifs POPULAR CHAMPION-PCI AAP : anti-agrégantsplaquettaire ATL : angioplastie transluminale percutanée Breet NJ et al. AHA 2009

Méthodologie (2) POPULAR Tests Critère principal d’efficacité Light Transmittance Aggregometry (LTA) 5 et 20 VerifyNow ® P2Y12 Plateletworks® Impact R ®, PFA100 ® COL/ADP Critère principal d’efficacité Décès, IDM, thrombose d’endoprothèse, AVC à 1 an Critère principal de sécurité Taux d’hémorragies mineures et graves, selon les critères TIMI , à 1 an . POPULAR CHAMPION-PCI Breet NJ et al. AHA 2009

Résultats POPULAR PLATO-STEMI Risque de survenue d’événements graves (critère principal) associé à l’effet anti-agrégant plaquettaire estimé par différents tests* 2 4 6 8 Risque Relatif 1er Quintile 1 3 5 7 2ème Quintile 3ème Quintile 4ème Quintile 5ème Quintile POPULAR LAT-5 LTA-20 CHAMPION-PCI PLATO-STEMI VerifyNow® Plateletworks® * Répartition des patients en quintiles selon l’importance de l’activité anti-agrégante plaquettaire Breet NJ et al. AHA 2009

Conclusion Les tests LTA, VerifyNow ® P2Y12, Plateletworks® se révèlent les plus performants pour l’identification des patients à risque athérothrombotique élevé. Les tests Impact R ®, PFA100 ® COL/ADP ne permettent pas cette stratification du risque. Aucun test ne permet de distinguer les patients à risque hémorragique. Le test VASP spécifique de l’activité anti-agrégante plaquettaire n’a pas été évalué dans cette étude. CHAMPION-PCI POPULAR Breet NJ et al. AHA 2009