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The Ultrasound Journal
Fig. 5 | The Ultrasound Journal

Fig. 5

From: The role of ultrasound imaging in vascular compression syndromes

Fig. 5

Hypertrophy of the right anterior scalene muscle. a Duplex Doppler US examination of the right subclavian veins, with lowered arms, shows a regular diameter and flow. b With arms raised to 90° Duplex Doppler US shows a peak speed reduction due to compression by the anterior scalene muscle. c Duplex Doppler US of left subclavian vein, with lowered arms, shows a regular caliber and flow. d Which remain regular even with arms raised to 90°

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