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Long-term effects of antiplatelet drugs on aneurysm occlusion after endovascular treatment
  1. Johannes Platz1,
  2. Erdem Güresir1,
  3. Volker Seifert1,
  4. Hartmut Vatter1,
  5. Joachim Berkefeld2
  1. 1Department of Neurosurgery, Goethe University, Frankfurt, Germany
  2. 2Department of Neuroradiology, Goethe University, Frankfurt, Germany
  1. Correspondence to Dr Johannes Platz, Department of Neurosurgery, Goethe University, Schleusenweg 2-16, Frankfurt, Germany; platz{at}


Background The rates of recanalization and reinterventions after endovascular treatment (EVT) of intracranial aneurysms are unknown. Various risk factors have been suggested including the configuration of the aneurysm and the endovascular technique. Recently, an increasing number of patients have received antiplatelet (AP) drugs periprocedurally, possibly inhibiting early thrombus formation.

Objective To assess the impact of AP drugs on the rate of recurrence and reintervention.

Methods Patients treated at our center were entered into a prospectively conducted database. Those with at least one follow-up angiogram 6 months after EVT were selected for the study. The role of AP medication was assessed by statistical analysis.

Results 292 patients with 314 aneurysms (206 ruptured) were included. The median follow-up time was 18 months. 129 (41%) were treated with APs (70 with acetylsalicylic acid (ASA), 10 with clopidogrel and 48 with both). 107 angiographic aneurysm recurrences were noted and 61 aneurysms were retreated at least once. In a multivariate model only aneurysm size, initially incomplete occlusion and the length of follow-up were significant predictors (p<0.05). No correlation was found between AP administration and recurrences or reinterventions. Interestingly, patients receiving ASA alone were retreated less often (OR 0.187, 95% CI 0.061 to 0.572, p=0.003).

Conclusion AP administration is not associated with an increased rate of aneurysm recurrence or reintervention; ASA even seemed to have some beneficial effect. However, confounding factors may include the lack of standardized indications for AP and the small number of patients in the series. A prospectively conducted study is warranted to further clarify the role of AP medication after EVT.

  • Meninges
  • MRI
  • posterior fossa
  • subarachnoid
  • thrombectomy
  • artery
  • spinal cord
  • thrombectomy
  • navigation
  • complication
  • aneurysm

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  • Competing interests None.

  • Provenance and peer review Not commissioned; externally peer reviewed.

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