image dons

je fais un don

Slow response to clopidogrel predicts low response.

SAFA2022 (12-16 décembre) - Les experts répondent à vos questions
Trouble du rythme cardiaque responsable d'AVC - Dépistage gratuit et sans rdv !

Colloquium : Pathologies cardiaques de la femme (15 novembre 2022)
Replay prochainement disponible ici !!!

Slow response to clopidogrel predicts low response.

Publié dans Journal of the American College of Cardiology, le 23 février 2010.

En savoir plus en consultant le site.

Auteurs : Bellemain-Appaix A, Montalescot G, Silvain J, Barthélémy O, Beygui F, Collet JP, Sideris G, Meuleman C, Bal-Dit-Sollier C, Lellouche N, Ducrocq G, Slama M, Milleron O, Henry P, Drouet L; ALBION Investigators.

Abstract

OBJECTIVES:

The purpose of this study was to determine whether the speed of response to clopidogrel loading predicts the final degree of response.

BACKGROUND:

Fast inhibition of platelet aggregation is important in the setting of acute coronary syndromes and percutaneous coronary intervention, but its association with the final degree of inhibition is not well established.

METHODS:

We performed a post hoc analysis of the ALBION study; early kinetic profiles of adenosine diphosphate 20 micromol/l maximal platelet aggregation (MPA) and DeltaMPA (with baseline sample as reference) were studied at 8 time points within the 24 h after clopidogrel loading (300, 600, or 900 mg) in non-ST-segment elevation acute coronary syndrome patients. Low response was defined as DeltaMPA <10% over the first 24 h, fast response as DeltaMPA > or =10% at 1 h or before loading (the others being slow responders), and high post-treatment platelet reactivity as MPA > or =56.56% (fourth quartile). Inflammatory markers (PAC-1 and P-selectin) and vasodilator-stimulated phosphoprotein (VASP) were also evaluated according to onset of action.

RESULTS:

Fifty-five percent of patients were slow responders. Noncurrent smoking and body mass index > or =25 kg/m(2) were associated with slower and lower responses. High post-treatment platelet reactivity was more frequent in slow responders (28% vs. 14%, p < 0.0001). There was a clopidogrel dose-effect relationship on DeltaMPA, with a trend toward faster onset of platelet inhibition in the 900-mg loading dose group. Slow responders had a slower and lower decrease in PAC-1 and P-selectin and higher VASP index at 6 h (76.5% vs. 66.4%, p = 0.019) and 24 h (70.3% vs. 61.5%, p = 0.049).

CONCLUSIONS:

Slow response to clopidogrel, within the first hour of administration, is a reliable marker of low response at 24 h and high post-treatment platelet reactivity.

Autres actualités

+

29/08/2022


Supraventricular arrhythmias more common than thought after...

Auteurs : Guedeney P, Laredo M, Zeitouni M, Hauguel-Moreau M, Wallet T, Elegamandji B, Alamowitch S, C...
+

10/09/2020


Culprit lesion location and outcomes in patients with multi-...

Publié dans EuroIntervention 2020 Sep 8: EIJ-D-20-00561. Auteurs : Hauguel-Moreau M, Barthélémy O, Farhan...
+

01/09/2020


COVID-19 acute myocarditis and Multisystem Inflammatory Synd...

Publié dans Chest 2020 Sep 7: S0012-3692(20)34359-2 Auteurs : Hékimian G, Kerneis M, Zeitouni M, Cohen-Au...