CONFERENCE UPDATE: ACC.23/WCC
Meta-analysis of real-world data shows reduced post-ACS stroke risk with ticagrelor
Among patients with acute coronary syndrome (ACS), clopidogrel is commonly used for the prevention of another cardiovascular (CV) event.1 However, the slow and variable transformation of clopidogrel to the active drug and its modest and variable platelet inhibition hamper the efficacy of the drug.1 Ticagrelor is a reversible and direct-acting oral antagonist of the adenosine diphosphate receptor P2Y12 which can provide faster, greater and more consistent P2Y12 inhibition than clopidogrel.1 Previously in the PLATO trial, ticagrelor was shown to reduce the risk of death from vascular causes, myocardial infarction (MI), or stroke among hospitalized patients when compared with clopidogrel (HR=0.84; 95% CI: 0.77-0.92; p<0.0001).1 Yet, ticagrelor’s benefit in reducing the risk of stroke was not demonstrated in this trial.1
It remains uncertain if ticagrelor can reduce stroke risk post-ACS when compared with clopidogrel.2 Therefore, a meta-analysis of real-world data was conducted to assess the effectiveness of ticagrelor vs. clopidogrel post-ACS in terms of stroke prevention.2 In the American College of Cardiology (ACC) Scientific Session/World Congress of Cardiology (WCC) 2023, Dr. Alaa Rahhal and his colleagues from Hamad Medical Corporation, Doha, Qatar, presented the results of the meta-analysis, which demonstrated that ticagrelor significantly reduced ischemic stroke in comparison to clopidogrel among patients with ACS.2
The meta-analysis was conducted in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines.2 Seventeen observational, retrospective and prospective studies exploring the effectiveness and safety of ticagrelor vs. clopidogrel in ACS patients, published in English until January 15, 2022, were selected.2 In the final analysis of stroke outcomes, a total of 167,446 patients were included.2 Results showed that ticagrelor significantly reduced the likelihood of ischemic stroke vs. clopidogrel by 17% within a follow-up period ranging from 6 to 24 months [Odds ratio (OR)=0.83; 95% CI: 0.75-0.92; I2=0%].2
Overall, the positive findings from the systemic review and meta-analysis of real-world data on ticagrelor may further support the use of ticagrelor over clopidogrel among patients with ACS.2