Antiplatelet Therapy After Stent Placement

Introduction to Antiplatelet Therapy

The American College of Cardiology recommends that clopidogrel should be continued for at least 1 month after bare-metal stent implantation, 3 months after sirolimus-eluting stent, and 6 months after paclitaxel-eluting stent, while aspirin should be continued indefinitely 1
The American Heart Association suggests that for patients with drug-eluting stents, dual antiplatelet therapy should be continued for at least 12 months if the patient is not at high risk of bleeding 1

For bare-metal stents, the minimum duration of clopidogrel therapy is 1 month, ideally up to 12 months, according to the American College of Cardiology 1
For sirolimus-eluting stents, the minimum duration of clopidogrel therapy is 3 months, as recommended by the American Heart Association 2
For paclitaxel-eluting stents, the minimum duration of clopidogrel therapy is 6 months, as suggested by the American College of Cardiology 2

The initial dosing of aspirin is 162-325 mg daily for at least 1 month after bare-metal stent, 3 months after sirolimus-eluting stent, and 6 months after paclitaxel-eluting stent, according to the American College of Cardiology 1
The long-term maintenance dosing of aspirin is 75-162 mg daily indefinitely after the initial period, as recommended by the American Academy of Family Physicians 5

Patients with drug-eluting stents placed within the past 6-12 months are at higher risk of stent thrombosis, according to the American College of Cardiology 4
Patients with a history of stent thrombosis are at higher risk of stent thrombosis, as suggested by the American Heart Association 4
Patients with multiple stents or long stents are at higher risk of stent thrombosis, according to the American College of Cardiology 4
Patients with bifurcation stents are at higher risk of stent thrombosis, as recommended by the American Heart Association 4
Patients with diabetes are at higher risk of stent thrombosis, according to the American Diabetes Association 4
Patients with low ejection fraction are at higher risk of stent thrombosis, as suggested by the American Heart Association 4
Patients with incomplete revascularization are at higher risk of stent thrombosis, according to the American College of Cardiology 4

For patients with increased bleeding risk, lower-dose aspirin (75-162 mg) is reasonable during the initial period after stent implantation, as recommended by the American College of Cardiology 1
If active bleeding develops, clopidogrel may be temporarily held while maintaining aspirin, but both medications should never be discontinued simultaneously if the stent was placed within the past year, according to the American Heart Association 4

Premature discontinuation of antiplatelet therapy significantly increases the risk of stent thrombosis (up to sevenfold), as suggested by the American College of Cardiology 4
A multidisciplinary team meeting should occur to assess individual thrombotic risk versus procedure-specific bleeding risk before any planned procedure requiring antiplatelet interruption, according to the American Heart Association 4
Aspirin should be resumed within 24-48 hours after the procedure unless absolutely contraindicated, as recommended by the American College of Cardiology 4

Current guidelines still recommend indefinite aspirin therapy as the standard approach for long-term maintenance monotherapy, according to the American Academy of Family Physicians 5
The American College of Cardiology recommends that aspirin should be continued indefinitely after the initial period, as suggested by the American Heart Association 1