Table 1.

Patient demographics, preoperative risk factors and operative features for all patients undergoing mitral valve replacement versus repair operations.

Variable	MVR (n=676)	MV Repair (n=801)	P-value
PREOPERATIVE
Patient Age	60.8±0.5	57.0±0.5	<0.001
Sex (Female)	293 (43.4%)	483 (60.6%)	<0.001
Hypertension	412 (60.9%)	401 (50.1%)	<0.001
Peripheral Arterial Disease	51 (7.5%)	30 (3.7%)	0.002
Stroke	72 (10.7%)	35 (4.4%)	<0.001
Diabetes Mellitus	131 (19.4%)	79 (9.9%)	<0.001
Heart Failure	377 (55.8%)	254 (31.7%)	<0.001
Atrial fibrillation	166 (24.6%)	74 (9.2%)	<0.001
NYHA Class
Class I	88 (13.0%)	185 (23.1%)	<0.001
Class II	194 (28.7%)	340 (42.4%)	<0.001
Class III	240 (35.5%)	217 (27.1%)	0.001
Class IV	154 (22.8%)	59 (7.4%)	<0.001
Infective Endocarditis	123 (18.2%)	65 (8.1%)	<0.001
Renal Failure	59 (8.7%)	29 (3.6%)	<0.001
Renal Failure (Hemodialysis)	46 (6.8%)	21 (2.6%)	<0.001
Ejection Fraction (%)	53.5±0.5	54.9±0.4	0.03
Mitral Stenosis	139 (20.6%)	17 (2.1%)	<0.001
Mitral Regurgitation (Moderate)	82 (12.1%)	98 (12.2%)	0.94
Mitral Regurgitation (Severe)	485 (71.7%)	658 (82.1%)	<0.001
OPERATIVE
Valve Replacement
Bioprosthetic	389 (57.5%)	-	-
Mechanical	287 (42.5%)	-	-
Valve Repair Technique
Annuloplasty Only	-	237 (29.6%)	-
Reconstruction with Annuloplasty	-	541 (67.5%)	-
Reconstruction without Annuloplasty	-	23 (2.9%)	-
Aortic Cross Clamp Time (min)	94.8±1.5	86.1±1.3	<0.001
Cardiopulmonary Bypass Time (min)	138.1±2.1	123.3±1.6	<0.001