Prevalence and Predictive Factors of Early Degeneration of Bioprosthetic Mitral Valves: A Single-Center Cohort Study
Table 3
Postoperative echocardiographic characteristics of the study population and comparison between patients with and without bioprosthetic mitral valve early degeneration.
Postoperative echocardiographic characteristics
Total (n = 177)
Nondegenerative (n = 138)
Degeneration (n = 39)
value
Mitral valve peak gradient
11.06 ± 3.4
10.89 ± 3.48
11.71 ± 2.90
0.20
Mitral valve mean gradient
5.21 ± 1.7
5.14 ± 1.81
5.49 ± 1.47
0.27
Clot formation, n (%)
2 (1.1)
0 (0)
2 (5.1)
0.05
Increased mitral valve gradient, n (%)
53 (59.9)
23 (16.7)
30 (76.9)
0.01
Pressure half time
78.8 ± 22.9
77.5 ± 21.7
83.6 ± 26.7
0.21
Doppler velocity index
1.9 ± 0.4
1.86 ± 0.40
1.95 ± 0.44
0.33
Paravalvular leak, n (%)
0.10
None
160 (90.4)
127 (94.1)
33 (89.2)
Trivial
3 (1.7)
1 (0.7)
2 (5.4)
Mild
7 (4.0)
6 (4.4)
1 (2.7)
Moderate
1 (0.6)
1 (0.7)
0 (0)
Moderate to severe
1 (0.6)
0 (0)
1 (2.7)
Transvalvular mitral regurgitation, n (%)
0.22
None
71 (40.1)
58 (43.0)
13 (35.1)
Trivial
29 (16.4)
25 (18.5)
4 (10.8)
Mild
68 (38.4)
50 (37.0)
18 (48.6)
Mild to moderate
4 (2.3)
2 (1.5)
2 (5.4)
was considered statistically significant. LVED: left ventricular end-diastolic; LVES: left ventricular end-systolic; PAP: pulmonary arterial pressure; PHT: pressure half-time.
