PMC6886349_01
Left subclavian vein guidewire (black arrows) seen on fluoroscopy does not follow the typical anatomical course (traversing across midline) and travels caudal along the left side.
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fig1
Intraoperatively, the left subclavian vein was accessed, the wire was placed, and fluoroscopy showed the wire to be abnormally travelling caudal on the left side without crossing midline (Figure 1).
CT angiogram chest that demonstrates duplication of the superior vena cava (red arrows) with a persistent left superior vena cava, which drains into the coronary sinus (red outline arrows) and then the right atrium.
CRIS2019-6401236.002.jpg
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fig2
The procedure was aborted, and a CT angiogram of the chest was obtained (Figure 2), revealing that the patient had a duplicate superior vena cava draining into the coronary sinus.