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

Table 3

Comparison of the diameter of the left atrium before and after percutaneous balloon mitral valvuloplasty in the 3 mitral regurgitation (MR) groups.

MR group	Preoperative diameter (mm)	Postoperative diameter (mm)	P value	Reduction (mm)
Mild	47.93 7.02	44.90 7.23	0.002	3.03 4.73
Moderate	49.70 3.53	45.40 4.77	0.009	4.30 4.11
Severe	53.19 8.91	48.94 6.65	0.025	4.25 6.78
P value	0.0463	0.1695		0.5529

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