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FIG 1. Angiographic demonstration of vasospasm associated with DMSO infusion.
A, DSA from superselective left ascending pharyngeal artery injection (anteroposterior projection) shows normal filling of the ascending pharyngeal and retial system.
B, Repeat DSA from selective left CCA injection 3 minutes after infusion of 0.8 mL DMSO over 90 seconds shows grade 3 vasospasm affecting the ascending pharyngeal artery (arrow).
C, Repeat DSA from left CCA injection 12 minutes after DMSO infusion shows complete resolution of vasospasm.
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