PMC5804657_01
Left radial artery pressure waveform. Pulse pressure was highly reduced and disappeared intermittently (black arrows)
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PMC5804657_01_40981_2017_131_Fig1_HTML.jpg
Fig1
After a short time, his blood pressure dropped again (Fig. 1) without any sign of bleeding at the surgical site, so we considered other reasons for the low blood pressure.
Preoperative enhanced CT (a coronal view, b axial view). Yellow dotted circles indicate the slightly compressed left subclavian artery in the left costoclavicular space. (blue arrow: clavicle, blue triangle: the first rib, green arrow: anterior scalene muscle)
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PMC5804657_01_40981_2017_131_Fig2_HTML.jpg
Fig2
Postoperatively, we reviewed enhanced computed tomography scans of the patient, and a slightly compressed left subclavian artery between the first rib and anterior scalene muscle was pointed out (Fig. 2).