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Adam M. Levine, DO, FACC Clinical Assistant Professor of Medicine Rowan University September 12 th, 2015
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None relevant to this topic
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Discuss current therapeutic targets for oral anticoagulants Discuss new oral anticoagulant specifics How to convert from one to another Discuss the use of triple therapy
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Atrial Fibrillation – Non-valvular ◦ Not intended for Mechanical heart valves or Severe MS Deep Venous Thrombosis/Pulmonary Embolus Acute coronary syndrome??
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DabigatranRivaroxabanApixabanEdoxaban TargetFactor IIaFactor Xa Half life14-17 Hrs5-9 Hrs8-13 Hrs9-11 Hrs Time to Peak 2-3 Hrs0.5-3 Hrs3 Hrs1.5 Hrs Bioavailable6.5%80%66%50% ExcretionRenal 80%Renal 66%Renal 50%Renal 45% InteractionsP-glyDual* P-gly ReversalIdarucizumabPCC, FVIIa?None Strong P-gly and CYP3A4 inhibitors: ketoconazole, itraconazole, lopinavir/ritonavir, indinavir, conivaptan Strong P-gly and CYP3A4 inducers: carbamazepine, phenytoin, rifampin, St. John’s wart *Inhibitors increase bleeding, inducers decrease efficacy PCC- Prothrombin Complex Concentrate
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DabigatranRivaroxabanApixabanEdoxaban All MortalityNon-Inferior SuperiorNon-Inferior BleedingNon-Inferior Superior StrokeSuperiorNon-InferiorSuperiorNon-Inferior IschemicYesNo HemorrhagicYes
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Dabigatran ◦ Dose DVT – 150mg BID, paraenteral anticoag for 5-10 days Afib – 150mg BID, (75mg BID CrCl 15-30) Rivaroxaban – give with meal ◦ Dose DVT – 15 mg BID x 21 days, then 20 mg daily Afib – 20 mg daily (15mg daily CrCl 15-50)
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Apixaban ◦ Dose DVT – 10 mg BID x 7 days, then 5 mg BID, no renal adjustment Afib – 5 mg BID, (2.5mg BID if 2 of the 3, Cr>1.5, >80 yo, <60 kg), can give in HD patient Edoxaban ◦ Dose DVT – 60 mg daily, paraenteral anticoag for 5-10 days, 30mg if <60 kg or CrCl 15-50 Afib – 60 mg daily, avoid if CrCl > 95, 30 mg if CrCl 15-50
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How to convert from Warfarin ◦ Dabigatran : Start when INR <2.0 ◦ Rivaroxaban: Start when INR <3.0 ◦ Apixaban: Start when INR <2.0 ◦ Edoxaban: Start when INR <2.5 How to convert to Warfarin ◦ Coadminister for 2 to 3 days prior to stopping NOAC ◦ If using dabigatran and CrCl<30, consider 1 day ◦ Alternative: Use paraenteral (heparin/LMWH) while awaiting theraputic INR
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All drugs have slightly different recommendation Rule of thumb – hold for 48 hours prior to surgery, restart as soon as possible Hold longer if high risk bleeding operation ◦ Intracranial, intraspinal, intrathoracic, retroperitoneal
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CHA 2 DS 2 VASc currently recommended for routine risk stratification Identifies more clearly low, intermediate and higher risk for systemic embolization Reclassifies people who definitely do not need anticoagulation, but will increase the number who will
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After coronary revascularization in patients with CHA2DS2-VASc score ≥2, it may be reasonable to use clopidogrel concurrently with oral anticoagulants but without aspirin ◦ (Class IIb, LOE B)
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Use bare metal stent when able Shortest duration of triple therapy as possible Avoid NOACs Use Clopidogrel For CHA 2 DS 2 VASc 0-1, don’t anticoagulate Consider lower target INR
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Individualize patient treatment Dosing is different for DVT/PE than Afib Know how to switch agents Avoid new drugs for now when triple therapy is needed
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