The primary objective of this multicenter study is to validate the AVICH score in terms of patient outcome prediction in AVM patients with associated ICH. Secondary objectives are the impact of pretreatment of the AVICH score. Patients outcome is measured using the modified Rankin Scale (mRS) and are grouped in favorable (mRS score, 0-2) and unfavourable (mRS score, 3-6) outcome at last follow-up (LFU). The following parameters, which are part of the AVICH score, will be compared between the 2 groups: ICH score including age, Glasgow Coma Scale (GCS) score, haemorrhage volume, presence of intraventricular hemorrhage (IVH), and localization of the ICH. Spetzler-Martin grade including AVM size, eloquent location, and venous drainage, as well as the Lawton-Young grade, including age, presence of ruptured AVM, and the nidus structure. In addition pre-/postruptured treatment modalities, including embolization, radiotherapy, surgery or no treatment will be analysed. Outcome (mRS) at 3 months, at 1 year, and at LFU will be compared. Multicentre validation study Key inclusion criteria: * All patients with ICH associated AVMs and a modified Rankin Scale \<2 (so 0-1) before hemorrhage * Pretreatment (embolization, radiosurgery, surgery) before ICH is not an exclusion criteria. Key exclusion criteria: * incomplete data set * AVM Patients with only subarachnoid hemorrhage (SAH) or IVH and no ICH
Age range
18 Years
Sex
ALL
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neurological long-term outcome (modified Ranking Scale, mRS)
Timeframe: up to 3 years at last follow-up