Key result
The left ventricular Tei index measured by tissue Doppler imaging significantly increased with the progression of clinical signs in dogs with mitral valve degenerative disease.
Why the study?
Does the Left Ventricular Tei index reflect left ventricular dysfunction in dogs with mitral valve degenerative disease?
Cross-Sectional (n=44)
No
Does the Left Ventricular Tei index reflect left ventricular dysfunction in dogs with mitral valve degenerative disease?
Absolute Event Rate: 0.96% vs 0.58%
p-value: p=<0.05
The Tei index measured by tissue Doppler imaging is a reproducible and useful echocardiographic parameter for reflecting left ventricular dysfunction in dogs with mitral valve degenerative disease.
Tei-index has been reported as one of reliable echocardiographic factors for evaluating cardiac function in human and small animals. In this study, Tei-index were measured and evaluated with other echocardiographic parameters in normal thirteen beagle dogs and thirty-one dogs with mitral valve degeneration. Normal range of Tei index with tissue Doppler obtained at septum and left ventricular free wall was 0.58 0.07 and 0.60 0.07, respectively. The values between septum and left ventricular free wall did not show significant difference. Tissue Doppler derived tei index showed better reproducibility and significantly lower values than the results obtained by pulsed wave Doppler. Tei index obtained in either method increased with the progression of clinical signs. Therefore, the increase of Tei index in dogs with mitral regurgitation is thought to be an useful factor reflecting left ventricular dysfunction.
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Lee et al. (2015) conducted a cross-sectional in Mitral Valve Degenerative Disease (MVDD) (n=44). Mitral Valve Degenerative Disease vs. Normal dogs was evaluated on Left ventricular Tei index measured by tissue Doppler imaging at the lateral wall (p=<0.05). The left ventricular Tei index measured by tissue Doppler imaging significantly increased with the progression of clinical signs in dogs with mitral valve degenerative disease.
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