Meta-Analysis of Duration of Dual Antiplatelet Therapy in Acute Coronary Syndrome Treated With Coronary Stenting.

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We aimed to evaluate if a shorter course of DAPT followed by P2Y12 inhibitor monotherapy is as effective as a 12-month course with fewer bleeding events. PubMed, Scopus, and Cochrane Central were searched for randomized controlled trials of ACS patients comparing dual antiplatelet therapy (DAPT) for 1 to 3 months followed by a P2Y12 inhibitor to 12-month DAPT. Quality assessment was performed with the Cochrane Collaboration risk of bias assessment tool. Five randomized clinical trials were included, with a total of 18,046 participants. Antiplatelet strategies were aspirin and P2Y12 inhibitor for 12 months compared with aspirin and P2Y12 inhibitor for 1 to 3 months followed by P212 inhibitor alone. Patients randomized to 1 to 3 months of DAPT followed by P2Y12 inhibitor monotherapy had lower rates of major bleeding (1.42% vs 2.53%; OR 0.53; 95% CI 0.42-0.67; p < 0.001; I2 = 0%) and all-cause mortality (1.00% vs 1.42%; OR 0.71; 95% CI 0.53-0.95; p = 0.02; I2=0%) with similar major adverse cardiac events (MACE) (2.66% vs 3.11%; OR 0.86; 95% CI 0.71 - 1.03; p = 0.10; I2 = 0 %) compared to 12 months of DAPT. In conclusion, shorter course of DAPT for 1 to 3 months followed by P2Y12 inhibitor monotherapy reduces major bleeding and all course mortality without increasing major adverse cardiac events compared with traditional DAPT for 12 months.


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Authors: Leonardo Knijnik, Marcelo Fernandes, Manuel Rivera, Rhanderson Cardoso, Abhinav Goyal, Henry Liberman, Laurence S Sperling, Michael C McDaniel

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