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. 2014 Aug 27;34(1):32–38. doi: 10.14366/usg.14029

Fig. 1. Doppler wave form changes of middle hepatic vein with monophasic pattern during the Valsalva maneuver.

Fig. 1.

A. The waveform is biphasic pattern at rest. B. During the Valsalva maneuver, the middle hepatic vein’s waveform express decreased in diameter, increased in minimal and maximal velocities, and its waveform change to a monophasic pattern.