This book contains the proceedings of the 7th International Conference on Cerebral Vasospasm, held in Interlaken, Switzerland, June 2000. Previous meetings devoted to cerebral vasospasm were held in Jackson, Mississippi (1972), Amsterdam, Netherlands (1979), Charlottesville, Virginia (1987), Tokyo (1990), Edmonton, Canada (1993), and Sydney, Australia (1997). The book provides the state of the art in reviews of major aspects of cerebral vasospasm by invited authors. The editors gratefully acknowledge the help of the staff of the Department of Neurosurgery of the University Hospital Berne, and especially of Mrs. Nicole Reinert-Flickiger, in the organization and running of the 7th International Conference on Cerebral Vasospasm. The editors extend their gratitude to the man.