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Identification of the subclavian and brachiocephalic veins. (A) Long axis view of the veins. Notice the confluence of the brachiocephalic vein and the internal jugular vein. IJV, internal jugular vein; SCV, subclavian vein; BCV, brachiocephalic vein. (B) Same patient. The Doppler is used to verify the flow in the vein. Notice how the flow changes with the respiration.
