Benefits of On-X Mitral Valve Replacement in Cases of Infective Endocarditis
Table 7
Pre-operative and post-operative echocardiographic variables in each of the two study groups.
Pre-operative period
Early post-operative period
Late post-operative period
values
Pre- vs. Early
Pre- vs. Late
Early vs. Late
On-X group
LAD (mm)
43.3 ± 13.4
39.9 ± 11.4
38.2 ± 10.8
0.5209
0.1087
0.5209
LVDd (mm)
52.6 ± 4.7
45.5 ± 5.4
43.6 ± 6.5
0.0324
0.0031
0.2828
LVDs (mm)
31.2 ± 5.1
31.1 ± 4.6
27.6 ± 4.3
0.9687
0.0599
0.1573
LVEF (%)
69.6 ± 7.7
58.7 ± 8.8
66.3 ± 7.4
0.0450
0.3648
0.1213
TR-PG (mmHg)
30.1 ± 10.9
18.3 ± 6.2
17.5 ± 5.2
0.0164
0.0008
0.6377
E/e′
22.4 ± 11.7
27.1 ± 10.5
30.1 ± 8.6
0.5497
0.5497
0.5497
MV peak v (m/s)
1.6 ± 0.3
1.7 ± 0.2
1.5 ± 0.3
0.7270
0.7358
0.0255
MV max PG (mmHg)
11.1 ± 7.4
13.7 ± 5.4
9.7 ± 4.0
0.5719
0.5719
0.0019
MV mean PG (mmHg)
4.9 ± 5.0
5.3 ± 2.5
3.6 ± 1.2
0.8859
0.8339
0.0485
Effective orifice area (cm2)
—
3.1 ± 0.8
2.8 ± 0.7
—
—
0.1680
Indexed effective orifice area (cm2/m2)
—
2.0 ± 0.5
1.8 ± 0.5
—
—
0.1602
SJM group
LAD (mm)
48.2 ± 7.5
45.7 ± 8.5
50.1 ± 10.9
0.2584
0.4061
0.0120
LVDd (mm)
54.3 ± 7.6
50.4 ± 6.7
49.0 ± 8.0
0.0044
0.0082
0.3703
LVDs (mm)
35.2 ± 6.3
36.1 ± 6.4
31.7 ± 7.3
0.3914
0.0619
0.0211
LVEF (%)
65.3 ± 6.4
54.8 ± 10.6
64.6 ± 9.6
0.0013
0.8020
0.0013
TR-PG (mmHg)
34.8 ± 19.0
22.4 ± 5.2
26.9 ± 9.6
0.0371
0.2480
0.0740
E/e′
19.7 ± 7.7
27.4 ± 7.5
32.1 ± 10.8
0.5333
0.2052
0.5333
MV peak v (m/s)
1.7 ± 0.4
1.8 ± 0.4
1.9 ± 0.4
0.6678
0.6678
0.6747
MV max PG (mmHg)
11.7 ± 4.7
12.7 ± 5.7
14.8 ± 5.6
0.7543
0.6959
0.6959
MV mean PG (mmHg)
4.0 ± 1.8
5.4 ± 1.8
5.1 ± 5.8
0.3157
0.4423
0.5156
Effective orifice area (cm2)
—
2.7 ± 0.8
2.2 ± 0.5
—
—
0.3652
Indexed effective orifice area (cm2/m2)
—
1.8 ± 0.7
1.4 ± 0.4
—
—
0.2324
Values are mean ± SD. vs. On-X valve. LAD left atrial diameter, LVDd left ventricular end-diastolic diameter, LVDs left ventricular end-systolic diameter, LVEF left ventricular ejection fraction, MV mitral valve, SJM St. Jude Medical, TR-PG tricuspid regurgitation pressure gradient.
