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01.12.2018 | Research article | Ausgabe 1/2018 Open Access

BMC Neurology 1/2018

Platelet activation and aggregation after aneurysmal subarachnoid hemorrhage

BMC Neurology > Ausgabe 1/2018
Pauline Perez, Anne-Claire Lukaszewicz, Stephanie Lenck, Rémy Nizard, Ludovic Drouet, Didier Payen
Wichtige Hinweise

Electronic supplementary material

The online version of this article (https://​doi.​org/​10.​1186/​s12883-018-1062-z) contains supplementary material, which is available to authorized users.
The manuscript has not been submitted or published elsewhere in whole or in part, except as an abstract (Congress of the French Society of Anesthesia and Critical Care - SFAR 2015).



Endovascular techniques have proven beneficial in the treatment of aneurysmal subarachnoid hemorrhage (aSAH), but with high risk of arterial clotting, emboli and dissection. Platelet activation and alterations in hemostasis may contribute to these complications. We investigated platelet activation and aggregation pathways in aSAH patients who underwent endovascular treatment.


Two blood samples were taken, in the early days after bleeding and during the period at risk of vasospasm. We studied platelet activation through the expression of GpIIbIIIa and P-selectin as well as aggregation rate in the presence of agonists. Platelets from aSAH patients were compared with those from orthopedic postoperative patients (POSTOP).


Platelets in aSAH were initially spontaneously activated and remained so over time. aSAH platelets were further activated with rapid aggregation in the presence of agonists, particularly ADP, with behavior comparable to POSTOP platelets.


aSAH platelets showed prolonged increases in activation and aggregation. Therapies targeting the ADP pathway might reduce the risk of clotting and ischemic events in this context among patients requiring multiple endovascular procedures.

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