Delayed versus immediate intervention of ruptured brain arteriovenous malformations: A case report

Figure 4 Digital subtraction angiography images before and after the embolization procedure on the brain arteriovenous malformation at approximately 3 mo post-ictus. The embolization procedure was performed on the left pericallosal artery using the Onyx 18 until the nidus and draining vein can no longer be visualized. A: The nidus, before embolization (red arrow) on antero-posterior (top) and lateral (bottom) view of arterial phase; B: Complete obliteration of the nidus after embolization on the arterial phase, antero-posterior (top) and lateral (bottom) view; C: The onyx cast visible through fluoroscopy, on antero-posterior (top) and lateral (bottom) view, indicated with blue arrow.