Figure 1

Chord diagram of overlapping vasospasm in cerebral vascular territories. Each arc represents concurrent vasospasm between the two vessels indicated along the circumference. Relative thickness indicates the number of vasospasm co-occurrences. ACA, anterior cerebral artery; BA, basilar artery; ICA, inferior cerebral artery; L, left; MCA, middle cerebral artery; PCA, posterior cerebral artery; R, right. Used with permission from Barrow Neurological Institute, Phoenix, Arizona.