Evaluation of mitral regurgitation grading by color Doppler vena contracta

Objective:To explore the roles of color Doppler vena contracta in the evaluation of mitral regurgitation grad-ing.Methods:30 cases of mitral regurgitation patients were studied by color Doppler to detect the vena contracta,jet length,jet area and instantaneous jet volume,then to compare the parameters between mild and moderate patients,and between moderate and severe mitral.Results:Mitral regurgitation in mild was(2.57±0.40) mm,in moderate was(3.23± 0.36) mm,in severe mitral was(5.52±1.10) mm.There was a significant difference between each group(P0.01～0.001).The correlation coefficient between color Doppler vena contracta,jet length,jet area,instantaneous jet volume and effective mi-tral orifice area were 0.85(P0.001),0.48(P0.01),0.69(P0.001),0.69(P0.001) respectively.Conclusion:Color Doppler vena contracta is less affected by hemodynamics and can more accurately estimate the jet size of mitral regurgitation grading.