Nice and short animation of GDC coils (Guglielmi Detachable Coils) being deployed in an aneurysm. Aneurysms of the cerebral vessels occur twice as often in females as males. Rupture of the aneurysm is heralded by a "thunderclap" headache, one that hits you like a hammer. Rupture is fatal in about 50% of cases. Prior to coiling, aneurysms were treated by placing a surgical clip across the neck. Some aneurysms are not amenable to coiling and still have to be clipped. Cerebral aneurysms are typically accessed thru the femoral (groin) artery. Guide wires are fed thru a sheath in the artery and maneuvered into the cerebral circulation. The video takes you from there. Platelets adhere to the coils and a clot forms within the aneurysm. Over several weeks, the lining of the artery grows over the old neck, sealing off the aneurysm. Although not too challenging from an anesthetic standpoint, these procedures are fun to watch.