As results, cardiac output was significantly correlated with mitral valve area(r=0.63), oxygen delivery(r=0.48), pulmonary vascular resistance(r=-0.46), oxygen delivery index(r=0.40) and mixed venous oxygen saturation(r=0.38), and was not significantly related to pulmonary artery pressures, pulmonary arterial wedge pressure and mitral pressure gradients. Whereas mixed venous oxygen saturation showed a significant correlation with pulmonary vascular resistance(r=-0.69), mean pulmonary artery pressure(r=-0.59), systolic pulmonary artery pressure(r=-0.59), diastolic pulmonary artery pressure(r=-0.59), mitral valve area(r=0.51), pulmonary arterial wedge pressure(r=-0.47), oxygen delivery index(r=-0.45), peak mitral pressure gradient(r=-0.41), oxygen delivery(r=-0.39), cardiac output(r=0.38) and mean mitral pressure gradient(r=-0.33).

These results indicate that mixed venous oxygen saturation is a very useful parameter for dynamic quantification of advanced mitral stenosis.