Figure 1: Digital subtraction angiography of the left forearm (intrarterial anterograde contrast injection with angiographic catheter paced in a left axillary artery) immediately after the ephedrine application. Multiple narrowings of radial artery due to vasospasms with absence of flow distally at the palmar region is seen (arrows). Perfusion of palmar region is maintained through a collateral flow from ulnar artery (deep palmar arch).