Table 2.
Comparison of the cardiac ultrasound parameters and blood NT-proBNP levels before and after the operations (x̅ ± sd)
| Time | n | LVEDD (mm) | CTR (%) | LVEF (%) | NT-proBNP (pg/mL) | 6 MWT (m) |
|---|---|---|---|---|---|---|
| Before the operation | 10 | 63.98±6.82 | 64.25±5.34 | 47.57±15.25 | 93.84±41.87 | 267.94±84.57 |
| 1 month after the operation | 10 | 55.24±5.15 | 58.72±5.47 | 62.53±10.74 | 88.42±36.64 | 395.62±64.37 |
| t | 3.237 | 2.299 | 2.552 | 0.592 | 3.799 | |
| P | 0.005 | 0.035 | 0.021 | 0.562 | 0.001 |
Note: LVEDD: left ventricular end-diastolic diameter; CTR: cardiothoracic ratio; LVEF: left ventricular ejection fraction; NT-proBNP: N-terminal brain natriuretic peptide; 6 MWT: 6 min walking test distance.