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FIG 1. A, EE-TCD shows an AVM with a diameter of 2.7 cm. The lesion is fed by the right PCA (arrow).
B, In the duplex mode, a high PSV (129.4 cm/s) and a low RI (35%) can be detected, indicating low vascular resistance.
C, Angiogram after catheterization of the left vertebral artery confirms the sonographic diagnosis.
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