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DOACs and Antiplatelets, if pt is over 65 --> OAC indicated 🩸
if pt…
DOACs and Antiplatelets
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5. Key Clinical Trials
landmark studies
RE-DUAL PCI: dabigatran 110mg + clopidogrel vs
dabigatran 150mg + clopidogrel vs
warfarin + clopidogrel + ASA
dabigatran had less bleeding ✅
AUGUSTUS: apixaban 5mg BID vs warfarin; ASA vs placebo
apixaban had less bleeding than warfarin ✅
ASA was better than placebo
PIONEER AF-PCI: rivaroxaban 15mg + clopidogrel ✅ vs
rivaroxaban 2.5mg BID + ASA + clopidogrel vs
warfarin + ASA + clopidogrel
better bleeding profile (less bleeding)
ENTRUST-AF PCI: edoxaban 60mg QD + clopidogrel vs
warfarin + clopidogrel + ASA
DID NOT MEET SUPERIORITY, therefore this trial showed that dual and triple are the SAME (but keep in mind this is with edoxaban, not other OACs) ❌
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commonalities
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efficacy outcomes are similar, but trials not powered for those
average 70y white male with non-valvular AF, CHADS2-VASC of 4, HASBLED of 3, and has had a PCI for ACS
all looking at bleeding as the primary outcome and they were NOT testing for efficacy like MI, stroke, clot, death, CV death, clot from a stent
unknown if efficacy of dabigatran, edoxaban, rivaroxaban are similar or not because the trials didn't test for those outcomes
Apixaban is preferred not because it's more effective (bc it technically is the same as warfarin in terms of efficacy), but because it showed the lowest bleeding risk in a well-designed trial (AUGUSTUS), that also used ASA vs placebo while all DOAC trials lacked power to confirm differences in stroke or clot prevention.
all the other trials compared dual to triple therapy directly, whereas AUGUSTUS compared OACs to each other and antiplatelets to each other
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if pt is over 65 --> OAC indicated 🩸
if pt has hx of stroke or TIA, or HTN, or HF, or DM --> OAC indicated 🩸
if pt has CAD or PAD --> antiplatelet needed 🍽️