Parameters | 6MWD | WHO-FC | NT-proBNP |
---|
 | r | P | r | P | r | P |
---|
VD | 0.561** | 0.002 | −0.413* | 0.026 | −0.472* | 0.010 |
MFI | 0.517** | 0.004 | −0.408* | 0.028 | −0.492** | 0.007 |
- 6MWD 6-minute walking distance; WHO FC World Health Organization functional class; NT-proBNP N-terminal prohormone of brain natriuretic peptide; VD vessel density; MFI microvascular flow index; *P < 0.05, **P < 0.01