DAPT Score Calculator
Calculate the DAPT score to guide prolonged dual antiplatelet therapy duration after percutaneous coronary intervention.
What Is the DAPT Score?
The DAPT score estimates whether prolonged dual antiplatelet therapy (DAPT) beyond one year after percutaneous coronary intervention is likely to provide net ischemic benefit over bleeding risk. It combines age with clinical and procedural factors. See also the CHA2DS2-VASc Calculator if evaluating stroke risk in atrial fibrillation.
Scoring Rules
Age under 65 contributes 0 points, age 65 to 74 subtracts 1 point, and age 75 or older subtracts 2 points. Current smoking, diabetes, MI at presentation, prior PCI or MI, stent diameter below 3 mm, and paclitaxel stent each add 1 point. CHF or LVEF below 30% and vein graft stent each add 2 points.
Interpretation
A score of 2 or higher suggests prolonged DAPT is favorable. A score of 1 or lower suggests prolonged DAPT is not favorable. Shared decision-making with the patient remains essential, weighing stent thrombosis risk against bleeding.
Frequently Asked Questions
Why does older age reduce the DAPT score?
Advanced age increases bleeding risk with antiplatelet therapy, so the score subtracts points for age 65 and older.
What score supports extended DAPT?
A total score of 2 or higher is interpreted as favorable for prolonged dual antiplatelet therapy after PCI.
Which factors add two points?
Congestive heart failure or left ventricular ejection fraction below 30%, and stenting of a saphenous vein graft, each add 2 points.
Does a low score mean stop all antiplatelets?
No. Standard-duration DAPT after PCI is still required. The score addresses whether extending beyond one year is beneficial.
Should paclitaxel stent type still be scored?
Paclitaxel-eluting stents were more common when the DAPT score was derived. Include this factor if it applies to the patient's procedure.
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