Platelet activation and aggregation after aneurysmal subarachnoid hemorrhage

Area of Science:

• Neuroscience
• Hematology
• Vascular Surgery

Background:

• Endovascular treatment for aneurysmal subarachnoid hemorrhage (aSAH) carries risks like arterial clotting and dissection.
• Platelet activation and hemostatic alterations may underlie these complications.
• Investigating platelet behavior is crucial for managing aSAH patients undergoing endovascular procedures.

Purpose of the Study:

• To investigate platelet activation and aggregation pathways in patients with aSAH undergoing endovascular treatment.
• To compare platelet behavior in aSAH patients with orthopedic postoperative patients (POSTOP).

Main Methods:

• Collected blood samples from aSAH patients early after bleeding and during vasospasm risk period.
• Assessed platelet activation via GpIIbIIIa and P-selectin expression.
• Measured platelet aggregation rates with agonists and compared with POSTOP patients.

Main Results:

• Platelets in aSAH patients exhibited spontaneous and sustained activation.
• aSAH platelets showed rapid aggregation in response to agonists, particularly ADP.
• Platelet aggregation in aSAH patients was comparable to POSTOP patients.

Conclusions:

• aSAH platelets demonstrate prolonged activation and aggregation.
• Targeting the adenosine diphosphate (ADP) pathway could mitigate clotting and ischemic risks.
• Further research into ADP pathway inhibition may benefit aSAH patients undergoing endovascular interventions.