1. Aspirin resistance among long-term aspirin users after carotid endarterectomy and controls: Flow cytometric measurement of aspirin-induced platelet inhibition 
Afshin Assadian, MD, Jaqueline Lax, MS, Ursula Meixner-Loicht, MD, Georg W. Hagmüller, MD, Peter Michael Bayer, MD, Wolfgang Hübl, MD 
Journal of Vascular Surgery 
Volume 45, Issue 6, Pages (June 2007)
DOI: /j.jvs
Copyright © 2007 The Society for Vascular Surgery Terms and Conditions

2. Fig 1
Activation of platelets by arachidonic acid (ARA): all 86 patients receiving long-term low-dose aspirin medication (ASP) showed inhibition of ARA-induced platelet activation (ie, <15% CD62p-positive platelets), whereas two of 29 patient controls without reported history of aspirin intake (PCON) demonstrated cyclooxygenase inhibition. The threshold of 15% is marked by the dashed line.
Journal of Vascular Surgery  , DOI: ( /j.jvs )
Copyright © 2007 The Society for Vascular Surgery Terms and Conditions

3. Fig 2
PFA-100 collagen-epinephrine closure time (CEPI-CT): 14 of 86 patients showed a normal CEPI-CT despite long-term low-dose aspirin medication (ASP). Four of 29 patient controls without an apparent history of aspirin intake (PCON) had an elevated CEPI-CT. The upper reference limit (165 seconds) is marked by the dashed line.
Journal of Vascular Surgery  , DOI: ( /j.jvs )
Copyright © 2007 The Society for Vascular Surgery Terms and Conditions