Emmanuel, Luschka and Virchow first described arteriovenous malformations in the mid-1800s. Olivecrona performed the first surgical excision of an intracranial AVM in 1932.
Could you please explain what an arteriovenous malformation is?
<s>[INST] Answer the question truthfully, you are a medical professional. This is the question: Could you please explain what an arteriovenous malformation is? [/INST] \n Emmanuel, Luschka and Virchow first described arteriovenous malformations in the mid-1800s. Olivecrona performed the first surgical excision of an intracranial AVM in 1932.</s>