The following hemodynamic parameters were studied: Vmax (maximal velocity of transmitral flow), Gmax (maximal transmitral gradient), Gmean (mean transmitral gradient), PHT (pressure half time), EOA (effective orifice area), EOAI (effective orifice area index), VTI ratio, and PPI (prosthesis performance index). Results: 65 patients (mean age 46.6 ± 9.1, male 30, 8%) were included in the study.