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Updated: May 22, 2026

Interventional Diagnostic Procedure: A Practical Guide for the Assessment of Coronary Vascular Function
Published on: March 15, 2022
Hemorrhagic complications after prasugrel (Effient) therapy for vascular neurointerventional procedures
S Hassan Akbari1, Matthew R Reynolds, Yasha Kadkhodayan
1Department of Neurological Surgery, Washington University School of Medicine, St Louis, Missouri, USA.
Insights
Dual antiplatelet therapy (DAPT) with aspirin and prasugrel may increase hemorrhage risk in neurointerventional surgery compared to aspirin and clopidogrel. This finding is crucial for patient safety and treatment selection in these procedures.
Area of Science:
- Neurosurgery
- Cardiology
- Pharmacology
Background:
- Dual antiplatelet therapy (DAPT) with aspirin and a thienopyridine is standard for preventing thromboembolic events in neurointerventional surgery.
- Clopidogrel resistance is common, leading to interest in alternative agents like prasugrel.
- Limited data exist on prasugrel's safety and efficacy in neurointerventional procedures.
Observation:
- A retrospective review of 76 patients undergoing neurointerventional surgery was conducted.
- Patients received either aspirin/clopidogrel or aspirin/prasugrel DAPT.
- Patients on aspirin/prasugrel were pre-identified clopidogrel non-responders.
Findings:
- Hemorrhagic complications occurred in 19.4% of patients on aspirin/prasugrel versus 3.6% on aspirin/clopidogrel (p=0.02).
- No significant differences in thrombotic complications were observed between the groups.
- Hemorrhage rates per procedure type were similar between treatment groups.
Implications:
- Aspirin/prasugrel DAPT may be associated with an increased risk of hemorrhage in neurointerventional surgery.
- These findings necessitate careful consideration of DAPT regimens in patients undergoing these procedures.
- Further research is warranted to optimize antiplatelet strategies in neurointerventional surgery.
Introduction:
Dual antiplatelet therapy (DAPT) with aspirin and a thienopyridine (eg, clopidogrel) prevents stent related thromboembolic events in cardiac patients and is frequently utilized during neurointerventional surgery. However, recent data suggest that many patients exhibit clopidogrel resistance. Prasugrel-a newer thienopyridine-lowers the rate of cardiac stent thromboses in clopidogrel non-responders but a paucity of data exist regarding its safety and efficacy in neurointerventional surgery.
Methods:
All patients undergoing neurointerventional surgery by a single interventionalist (CJM) over a 20 month period were retrospectively identified. Charts were reviewed for pre- and post-procedural DAPT regimens, pre-procedural coagulation parameters and procedural complications.
Results:
76 patients received pre- and post-procedural DAPT for endovascular treatment of an intracerebral aneurysm, dural arteriovenous fistula or intra/extracranial arterial stenosis. 51 patients underwent 55 total procedures and were treated with aspirin/clopidogrel; 25 patients underwent 31 total procedures and were treated with aspirin/prasugrel. Those patients who received aspirin/prasugrel DAPT were identified pre-procedurally to be clopidogrel non-responders. Both treatment groups had a similar percentage of patients undergoing aneurysm coiling, stent assisted aneurysm coiling, aneurysm Onyx embolization, aneurysm pipeline embolization device treatment, extra/intracranial carotid artery angioplasty and stenting, and dural arteriovenous fistula coil embolization. A total of eight (9.3%) hemorrhagic complications were observed, two (3.6%) in the aspirin/clopidogrel group and six (19.4%) in the aspirin/prasugrel group (p=0.02). No differences were noted in hemorrhage rates for each procedure between treatment groups, nor were there any differences in thrombotic complications between groups.
Conclusion:
Our results suggest that DAPT with aspirin/prasugrel may predispose to a higher risk of hemorrhage during neurointerventional surgery compared with DAPT with aspirin/clopidogrel.
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