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

Table 4

Comparison of the mitral regurgitation area 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	Change (cm^2)
Mild	1.22 1.24	3.23 3.92	0.001
Moderate	6.21 0.87	4.39 2.25	0.010	1.82 1.88
Severe	10.47 1.73	8.33 3.62	0.008	2.14 2.91
P value	<0.0001	0.0003		<0.0001

P < 0.001 for mild group versus severe group in the same column.
P < 0.001 for mild group versus moderate group in the same column.
P < 0.05, P < 0.01, and P < 0.001 for moderate group versus severe group in the same column.