Effectiveness of Percutaneous Balloon Mitral Valvuloplasty for Rheumatic Mitral Stenosis with Mild to Severe Mitral Regurgitation

Table 2

Comparison of the cross-sectional area of the mitral valveorifice before and after percutaneous balloon mitral valvuloplasty in the 3 mitral regurgitation (MR) groups.

MR group	Preoperative area (cm^2)	Postoperative area (cm^2)	P value	Increase (cm^2)
Mild	0.85 0.22	1.69 0.41	<0.0001	0.84 0.35
Moderate	0.83 0.18	1.45 0.35	<0.0001	0.62 0.29
Severe	0.84 0.21	1.45 0.24	<0.0001	0.61 0.26
P value	0.9771	0.0453		0.0254

P < 0.05 for mild group versus severe group in the same column.
P < 0.05 for mild group versus moderate group in the same column.