CONFERENCE UPDATE: ACC.23/WCC

Meta-analysis of real-world data shows reduced post-ACS stroke risk with ticagrelor

27 Apr 2023

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

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Rapid CABG trial supports early surgical strategy 2-3 days after ticagrelor cessation in ACS management

Ticagrelor continues to be one of the often-used antiplatelet drugs in the management of acute coronary syndrome (ACS), however only 10% of the ACS patients treated with ticagrelor require coronary artery bypass surgery (CABG) due to perioperative bleeding.1 The current North American guidelines (Including ACC/AHA) advocate a waiting period of at least 5 days after ticagrelor cessation prior to non-urgent CABG, and the 2017 European Society of Cardiology (ESC) guidelines also recommend a waiting period of at least 3 days after ticagrelor cessation for non-urgent CABG. However, from the real-life clinical point of view, it is hypothesized that early surgery is noninferior to delayed surgery for severe or massive perioperative bleeding. Therefore, the RAPID CABG trial, a physician initiated multi-centre randomized study, was conducted to evaluate the safety of early CABG surgery after a shorter ticagrelor cessation of 2 to 3 days as compared to 5 to 7 days prior CABG, among 143 patients presenting with ACS who require non emergent CABG.1 Primary endpoint was severe/ massive bleeding by the Universal Definition of Perioperative Bleeding (UDPB): Class 3 or 4.

The results from a 6-month follow-up of RAPID CABG trial indicated patients could discontinue ticagrelor 2 to 3 days prior to CABG without increasing the risk of early post-surgical bleeding and could also reduce the average length of hospital stay.

31 Dec 2021