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Doppler ultrasonography measurement of hepatic hemodynamics during Valsalva maneuver: healthy volunteer study.

Bang DH, Son Y, Lee YH, Yoon KH - Ultrasonography (2014)

Bottom Line: Thirty healthy men volunteers were enrolled (mean age, 25.5±3.64 years).These changes were compared using paired t-test.These findings suggest that hepatic vein might play an important role to maintain venous return to the heart during the maneuver.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology, Wonkwang University School of Medicine, Iksan, Korea.

ABSTRACT

Purpose: The aim of our study was to assess the hemodynamic change of liver during the Valsalva maneuver using Doppler ultrasonography.

Methods: Thirty healthy men volunteers were enrolled (mean age, 25.5±3.64 years). The diameter, minimal and maximal velocities, and volume flow of intrahepatic inferior vena cava (IVC), middle hepatic vein (MHV), and right main portal vein (RMPV) was measured during both rest and Valsalva maneuver. These changes were compared using paired t-test.

Results: The mean diameters (cm) of the intrahepatic IVC at rest and Valsalva maneuver were 1.94±0.40 versus 0.56±0.66 (P<0.001). The mean diameter (cm), minimal velocity (cm/sec), maximal velocity (cm/sec), and volume flow (mL/min) of MHV at rest and Valsalva maneuver were 0.60±0.15 versus 0.38±0.20 (P<0.001), -7.98±5.47 versus 25.74±13.13 (P<0.001), 21.34±6.89 versus 35.12±19.95 (P=0.002), and 106.94±97.65 versus 153.90±151.80 (P=0.014), respectively. Those of RMPV at rest and Valsalva maneuver were 0.78±0.21 versus 0.76±0.20 (P=0.485), 20.21±8.22 versus 18.73±7.43 (P=0.351), 26.79±8.85 versus 24.93±9.91 (P=0.275), and 391.52±265.63 versus 378.43±239.36 (P=0.315), respectively.

Conclusion: The blood flow velocity and volume flow of MHV increased significantly during Valsalva maneuver. These findings suggest that hepatic vein might play an important role to maintain venous return to the heart during the maneuver.

No MeSH data available.


Doppler wave form of middle hepatic vein with biphasic pattern without significant change during Valsalva maneuver.A. At rest, biphasic pattern is seen in a subject. B. During Valsalva maneuver, there is no significant change of the waveform’s morphology and its diameter; there is no elevation of minimal velocity or maximal velocity.
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f3-usg-14029: Doppler wave form of middle hepatic vein with biphasic pattern without significant change during Valsalva maneuver.A. At rest, biphasic pattern is seen in a subject. B. During Valsalva maneuver, there is no significant change of the waveform’s morphology and its diameter; there is no elevation of minimal velocity or maximal velocity.

Mentions: Mainly, MHV Doppler waveform showed triphasic pattern (73.4%) during rest period and monophasic pattern (80.0%) during Valsalva maneuver. The patterns of MHV waveform changes demonstrated by following figures and a table (Table 2, Figs. 1-3).


Doppler ultrasonography measurement of hepatic hemodynamics during Valsalva maneuver: healthy volunteer study.

Bang DH, Son Y, Lee YH, Yoon KH - Ultrasonography (2014)

Doppler wave form of middle hepatic vein with biphasic pattern without significant change during Valsalva maneuver.A. At rest, biphasic pattern is seen in a subject. B. During Valsalva maneuver, there is no significant change of the waveform’s morphology and its diameter; there is no elevation of minimal velocity or maximal velocity.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4282232&req=5

f3-usg-14029: Doppler wave form of middle hepatic vein with biphasic pattern without significant change during Valsalva maneuver.A. At rest, biphasic pattern is seen in a subject. B. During Valsalva maneuver, there is no significant change of the waveform’s morphology and its diameter; there is no elevation of minimal velocity or maximal velocity.
Mentions: Mainly, MHV Doppler waveform showed triphasic pattern (73.4%) during rest period and monophasic pattern (80.0%) during Valsalva maneuver. The patterns of MHV waveform changes demonstrated by following figures and a table (Table 2, Figs. 1-3).

Bottom Line: Thirty healthy men volunteers were enrolled (mean age, 25.5±3.64 years).These changes were compared using paired t-test.These findings suggest that hepatic vein might play an important role to maintain venous return to the heart during the maneuver.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology, Wonkwang University School of Medicine, Iksan, Korea.

ABSTRACT

Purpose: The aim of our study was to assess the hemodynamic change of liver during the Valsalva maneuver using Doppler ultrasonography.

Methods: Thirty healthy men volunteers were enrolled (mean age, 25.5±3.64 years). The diameter, minimal and maximal velocities, and volume flow of intrahepatic inferior vena cava (IVC), middle hepatic vein (MHV), and right main portal vein (RMPV) was measured during both rest and Valsalva maneuver. These changes were compared using paired t-test.

Results: The mean diameters (cm) of the intrahepatic IVC at rest and Valsalva maneuver were 1.94±0.40 versus 0.56±0.66 (P<0.001). The mean diameter (cm), minimal velocity (cm/sec), maximal velocity (cm/sec), and volume flow (mL/min) of MHV at rest and Valsalva maneuver were 0.60±0.15 versus 0.38±0.20 (P<0.001), -7.98±5.47 versus 25.74±13.13 (P<0.001), 21.34±6.89 versus 35.12±19.95 (P=0.002), and 106.94±97.65 versus 153.90±151.80 (P=0.014), respectively. Those of RMPV at rest and Valsalva maneuver were 0.78±0.21 versus 0.76±0.20 (P=0.485), 20.21±8.22 versus 18.73±7.43 (P=0.351), 26.79±8.85 versus 24.93±9.91 (P=0.275), and 391.52±265.63 versus 378.43±239.36 (P=0.315), respectively.

Conclusion: The blood flow velocity and volume flow of MHV increased significantly during Valsalva maneuver. These findings suggest that hepatic vein might play an important role to maintain venous return to the heart during the maneuver.

No MeSH data available.