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One -year outcomes Prasugrel vs. Ticagrelor in AMI treated with p PCI PRAGUE-18 study

This study compares the efficacy and safety of Prasugrel and Ticagrelor in patients with acute myocardial infarction (AMI) treated with percutaneous coronary intervention (pPCI) over a 12-month period. The study also investigates the risk of major ischemic events associated with switching to Clopidogrel post-discharge due to cost considerations. Results indicate no significant difference in outcomes between Prasugrel and Ticagrelor, and switching to Clopidogrel post-discharge did not increase the risk of ischemic events. The study enrolled 1230 patients, with detailed analyses of primary clinical endpoints and time distribution of switches to Clopidogrel. Conclusions highlight the comparable effectiveness of Prasugrel and Ticagrelor in the first year post-AMI and the safety of economically motivated switches to Clopidogrel if approved by treating physicians.

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One -year outcomes Prasugrel vs. Ticagrelor in AMI treated with p PCI PRAGUE-18 study

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  1. PRAGUE One-year outcomes Prasugrel vs. Ticagrelorin AMI treated with pPCIPRAGUE-18 study Zuzana Motovska, PetrWidimsky on behalf of the PRAGUE-18 study investigators AHA SCIENTIFIC SESSIONS Anaheim 2017 PRAGUE – 18 STUDY

  2. PRAGUE-18 study Head-to-head randomized comparison of Prasugreland Ticagrelor in patients with AMI undergoing pPCI Prasugrel and Ticagrelor dose regimensaccording to theguidelines, intendedtreatmentduration 12 months Purely academic project, no industrial support AHA SCIENTIFIC SESSIONS Anaheim 2017 PRAGUE – 18 STUDY

  3. Exclusioncriteria • Historyofstroke • Seriousbleeding < 6 months • Indicationfor OAC • Prerandomizationclopidogrel ≥300 mg • Body weight <60 kg in a patient >75 years • Moderate-to-severe liver disease • Treatmentwithpotent CYP3A4 inhibitors • Known hypersensitivity to prasugrelorticagrelor Inclusioncriteria • STEMI /very high-risk NSTEMI • Primary PCI strategy: Immediate (<2 hs) CAG ± pPCI • Signedinformedconsent AHA SCIENTIFIC SESSIONS Anaheim 2017 PRAGUE – 18 STUDY

  4. SAMPLE SIZE Futility analysis Difference in primary EP 2.5%, a two-sided overall alpha level of 0.05, and a statistical power of 80% Needed sample size: 1250 each arm Enrollment terminated prematurely because of futility Randomized 1230 patients; 634 Prasugrel / 596 Ticagrelor Comparison of real differences in 1° EP and the minimal difference detected as statistically significant based on power analysis AHA SCIENTIFIC SESSIONS Anaheim 2017 PRAGUE – 18 STUDY

  5. 1° net-clinical endpoint at day 7 All-cause Death/reMI/urgent TVR/Stroke/Serious bleeding 4.1% 4.0% NNT: 1158 AHA SCIENTIFIC SESSIONS Anaheim 2017 PRAGUE – 18 STUDY

  6. SWITCH TO CLOPIDOGREL AFTER DISCHARGE Prior the end of their hospitalization, every patient was informed • about the out-of-pocket costs for study drugs • about the clinical benefit of long-term prasugrel/ticagrelor compared to clopidogrel The study protocol allowed patients, who were not willing to accept the costs associated with a study medication, to switch to clopidogrel AHA SCIENTIFIC SESSIONS Anaheim 2017 PRAGUE – 18 STUDY

  7. OBJECTIVE • Comparison of efficacy and safety between Prasugreland Ticagrelor during the whole 12-months study period • Risk of major ischemic events related to an economically motivated post-discharge switch to clopidogrel AHA SCIENTIFIC SESSIONS Anaheim 2017 PRAGUE – 18 STUDY

  8. The PRAGUE-18 study group Prasugrel Ticagrelor N=1230 N=634 N=596 FU 365 days No information on the combined EP during 365 days * N=0 N=0 Without the end-of-treatment data for patients who discontinued study drugs less than12 months after randomization ** N=3 N=0 * The combined efficacy endpoint (EP) = Cardiovascular death, Non-fatal myocardial infarction, Stroke: Missing information in 19 patients were supplemented from national registries of the Institute of Health information and Statistics of the Czech Republic. **For missing end-of-treatment data in 3 patients, a visit data were added for which treatment discontinuations were reported. AHA SCIENTIFIC SESSIONS Anaheim 2017 PRAGUE – 18 STUDY

  9. KEY EFFICACY ENDPOINT: CV Death/Non-fatal MI/Stroke HR (P/T) 1.167; 95% CI0.742to 1.835, P=0.503 (Log Rank test) AHA SCIENTIFIC SESSIONS Anaheim 2017 PRAGUE – 18 STUDY

  10. END POINTS AHA SCIENTIFIC SESSIONS Anaheim 2017 PRAGUE – 18 STUDY

  11. SWITCH TO CLOPIDOGREL AHA SCIENTIFIC SESSIONS Anaheim 2017 PRAGUE – 18 STUDY

  12. Time distribution of economically motivated switches to clopidogrel after discharge AHA SCIENTIFIC SESSIONS Anaheim 2017 PRAGUE – 18 STUDY

  13. The hazard ratio was based on the Cox proportional hazard model with time dependent covariates AHA SCIENTIFIC SESSIONS Anaheim 2017 PRAGUE – 18 STUDY

  14. Significant differences in patient- and procedure related characteristics and economically motivated switch to clopidogrel AHA SCIENTIFIC SESSIONS Anaheim 2017 PRAGUE – 18 STUDY

  15. Conclusions Prasugreland Ticagrelorare similarly effective and safe during the first year after MI treated with pPCI Economically motivated, early post-discharge switch to clopidogrel, when approved by treating physicians, was not associated with increased risk of ischemic events AHA SCIENTIFIC SESSIONS Anaheim 2017 PRAGUE – 18 STUDY

  16. AHA SCIENTIFIC SESSIONS Anaheim 2017 PRAGUE – 18 STUDY

  17. Back-up slides AHA SCIENTIFIC SESSIONS Anaheim 2017 PRAGUE – 18 STUDY

  18. HR=1.000HR=1.167 16.599 AHA SCIENTIFIC SESSIONS Anaheim 2017 PRAGUE – 18 STUDY

  19. CLINICAL SIGNIFICANCE NUMBER NEEDED TO TREAT Preference of Prasugrel/Ticagrelor over Clopidogrel TRITON Primary ischemic EP Difference: 2.2% NNT: 46 PLATO Primary ischemic EP Difference: 1.9% NNT: 53 Non-preference between Prasugrel/Ticagrelor PRAGUE-18 Primary Net-clinical EP difference: 0.1% NNT: 1158 Like PLATO/TRITON Primary EP Difference: 0.3% NNT: 333 AHA SCIENTIFIC SESSIONS Anaheim 2017 PRAGUE – 18 STUDY

  20. CV Death/Spontanoeus MI/Stroke CV Death/Spont. + Peri-PCI MI/Stroke Prasugrel(PRAGUE 18 study) Prasugrel (TRITON trial) 6.6% 6.2% Ticagrelor(PRAGUE 18study) Ticagrelor(PLATO trial) 8.0% 7.9% AHA SCIENTIFIC SESSIONS Anaheim 2017 PRAGUE – 18 STUDY

  21. All-cause DEATH CV Death/Spont. + Peri-PCI MI/Stroke CARDIOVAScULAR DEATH Non-fatal MYOcardial infarction AHA SCIENTIFIC SESSIONS Anaheim 2017 PRAGUE – 18 STUDY

  22. SAFETY AHA SCIENTIFIC SESSIONS Anaheim 2017 PRAGUE – 18 STUDY

  23. Time distribution of economically motivated switches to clopidogrel after discharge % of patients Time from discharge (days)

  24. BENEFIT OF DAPT IN STEMI and pPCI “Spontaneous” primary endpoint (CV death, nonprocedural MI, stroke) among primary PCI patients Primary endpoint (CV death, MI, stroke) among primary PCI patients HR 0.91, 95% CI 0.75 to 1.12, p=0.38 TRITON trial PLATO trial J Am Coll CardiolIntv 2014;7:604 Heart 2016;102:617 AHA SCIENTIFIC SESSIONS Anaheim 2017 PRAGUE – 18 STUDY

  25. NEJM 2009 AHA SCIENTIFIC SESSIONS Anaheim 2017 PRAGUE – 18 STUDY

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