Doppler echocardiography is the method of choice for quantifying mitral regurgitation. There are methods, especially those based on the study of the zone of convergence or proximal isovelocity which are remarkable advances in this indication. The results are compared with those of other semi-quantitative parameters. The comparison and concordance of these results provides a reliable evaluation of the severity of the regurgitation in over 90% of cases. In this article, the authors review the different approaches to quantification, their indications and limitations.