Summary
Viscous velocity loss becomes important only at very small holes where the volume of regurgitation is negligible.
Contraction of the jet gives a lower volume flow than expected from the equation of continuity, but has only a negligible influence on the velocity in the core flow of the regurgitant jet.
Inherent properties of the spectral analysis of the Doppler signal, in combination with a small core flow volume will create difficulties in distinguishing high regurgitant velocities from background noise.
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© 1986 Martinus Nijhoff Publishers, Dordrecht
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Wranne, B., Ask, P., Loyd, D. (1986). Factors influencing fluid velocity measurements in valvular regurgitation. In: Roelandt, J. (eds) Color Doppler Flow Imaging. Developments in Cardiovascular Medicine, vol 54. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-4283-7_3
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DOI: https://doi.org/10.1007/978-94-009-4283-7_3
Publisher Name: Springer, Dordrecht
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