Key result
Hepatic vein Doppler S/D ratio accurately identifies significant tricuspid regurgitation with ~0.91 AUC.
Why the study?
The relationships between hepatic vein measurements by pulsed-wave Doppler ultrasonography and tricuspid regurgitation severity in dogs were not well defined.
Cross-Sectional (n=29)
Pulsed-wave Doppler of the hepatic vein in normal dogs demonstrates a tetraphasic waveform with A, S, V, and D components.
Answers are grounded in this paper and cite their sources.
Provides normative hepatic vein Doppler data in dogs; leaves open clinical translation in veterinary practice.
This study was performed to identify the relationships between hepatic vein (HV) measurements, including flow velocity and waveform, using pulsed-wave (PW) Doppler ultrasonography, and the severity of tricuspid regurgitation (TR) in dogs. The study included 22 dogs with TR and 7 healthy dogs. The TR group was subdivided into 3 groups according to TR jet profile obtained by echocardiography. The hepatic venous waveform was obtained and classified into 3 types. A variety of HV measurements, including the maximal velocities of the atrial systolic, systolic (S), end ventricular systolic, and diastolic (D) waves and the ratio of the S- and D- wave velocities (S/D ratio), were acquired. TR severity was significantly correlated with the S- (r = −0.380, p = 0.042) and D- (r = 0.468, p = 0.011) wave velocities and the S/D ratio (r = −0.747, p < 0.001). Receiver operating characteristic curve analysis revealed the highest sensitivity and specificity for the S/D ratio (89% and 75%, respectively) at a threshold of 0.97 with excellent accuracy (AUC = 0.911, p < 0.001). In conclusion, PW Doppler ultrasonography of the HV can be used to identify the presence of significant TR and to classify TR severity in dogs.
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Kim et al. (2017) conducted a cross-sectional in Tricuspid regurgitation (n=29). Hepatic vein pulsed-wave Doppler ultrasonography vs. Healthy controls was evaluated on Diagnostic accuracy of the S/D ratio for identifying significant tricuspid regurgitation (AUC 0.911, p=<0.001). Hepatic vein pulsed-wave Doppler ultrasonography using the S/D ratio accurately identified the presence of significant tricuspid regurgitation in dogs (AUC 0.911, p < 0.001).
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