Registry Study Reveals Low Overall Incidence (0.65%) of Iatrogenic Dissection in Neuroendovascular Procedures

In a nationwide registry of 53,402 neuroendovascular procedures, iatrogenic vessel dissection incidence was 0.65%. Isolated dissection rarely caused worsening (89.5% no mRS decline); deterioration linked to secondary hemorrhage/infarction.

• Overall incidence ranged from 0.12% (vasospasm treatment) to 3.48% (intracranial angioplasty/stenting).
• In aneurysm treatment, dissection was independently associated with poor 30-day outcome (mRS 5-6: adjusted OR 2.48; 95% CI, 1.05-5.40).
• Among isolated dissections, clinical deterioration was driven by secondary intracranial hemorrhage or infarction, not the dissection itself.

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