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Noise from the mechanical mitral valve in the two groups (mean ± SD)
| Control group | Intervention group | P-value | ||
|---|---|---|---|---|
| N | 32 | 32 | ||
| GK valve | n | 13 | 14 | |
| Noise (dB) | 68.3 ± 8.9 | 69.7 ± 7.0 | 0.6627 | |
| SJM valve | n | 19 | 18 | |
| Noise (dB) | 69.9 ± 5.1 | 68.2 ± 6.3 | 0.6649 | |
GK valve: bileaflet mechanical cardiac valve; SJM valve: St. Jude mechanical cardiac valve; SD: standard deviation
