TRAIL: Treatment of Intracranial Aneurysms With LVIS® System

Inclusion Criteria: 1. Patient or patient's legally authorized representative has been informed about the confidentiality of the study and has agreed to the collection of his/her personal data 2. Patient has a ruptured or unruptured intracranial aneurysm for which: * The parent artery has a diameter ≥ 2.0mm and ≤ 4.5 mm; * The aneurysm neck size is ≥ 4mm or its dome-to-neck ratio is \< 2 (wide neck) * Endovascular treatment with coils and one or more LVIS® devices has been determined necessary for the patient by the multidisciplinary team 3. Patient is aged ≥ 18 years 4. Patient presents with a WFNS score between 0 and 3 5. Patient has agreed to attend follow-up appointments Exclusion Criteria: 1. The use of an endovascular stent other than LVIS® has been determined necessary 2. Patient presents with medical or surgical co-morbidities limiting his/her life expectancy to less than one year 3. Patient has a contraindication to platelet inhibition treatment 4. Patient requires retreatment of an aneurysm previously treated with a stent 5. Patient is pregnant 6. Patient has multiple aneurysms to be treated in one procedure