The systolic pulmonary artery pressure, left atrial mean pressure, trans - mitral gradient and left atrium diameter decreased sucessively from 59, 96 + 21, 72 to 39, 11 + 13, 53 mmHg (P = 0.000), 20.15±6.25 to 12.69±5.69 mmHg (P = 0.000), 14.41 ± 5.94 to 4.43±2.82 mm Hg (P = 0.000), and 49.05±9.67 to 36.19±11.2 mm (P=0.001).