“…Most recently, Kamiyama et al 7 reported that of nine cases, three (33%) developed rebleeding, 3 hours after the first hemorrhage in one and during the acute state in two. In other sporadic reports of nine cases, 58 -13 rebleeding was noted in four: 15 days, 9 30 days, 8 2 hours, and 10 hours 11 after the initial bleeding. Among these 60 reported cases of ruptured vertebral artery dissecting aneurysms, (including our three), 18 (30%) were documented to have rebled.…”