A Comparative Analysis between Ultrasound-Guided and Conventional Distal Transradial Access for Coronary Angiography and Intervention
(a) Angiography from the distal radial artery shows the total occlusion of the radial artery (arrow). (b) Guidewire advance into the brachial artery. (c) After an exchange to 0.014-inch guidewire, balloon dilatation is performed. (d) Angiography from the distal radial artery shows the patency of the radial artery after the procedure.