Table 2.
Correlation between MIBG scintigraphy and autonomic function tests.
| Early H/M ratio (P value) |
Delayed H/M ratio (P value) |
Washout rate (P value) |
|
|---|---|---|---|
| HRV | |||
| LF component | 0.02 (0.89) | −0.02 (0.90) | 0.00 (0.99) |
| HF component | 0.18 (0.21) | 0.13 (0.35) | −0.20 (0.17) |
| LF/HF ratio | −0.16 (0.28) | −0.16 (0.27) | 0.26 (0.07) |
| CVR-R | 0.21 (0.15) | 0.19 (0.19) | −0.27 (0.06) |
| HUT test | |||
| SBP change | 0.17 (0.23) | 0.24 (0.09) | −0.34 (0.02) |
| DBP change | 0.07 (0.63) | 0.14 (0.32) | −0.29 (0.04) |
| HR change | 0.20 (0.16) | 0.15 (0.30) | 0.12 (0.43) |
Data are represented as Spearman correlation coefficients. The bold letter indicates significant (P < 0.05) correlation. MIBG, 123I-metaiodobenzylguanidine myocardial scintigraphy; H/M ratio, heart to mediastinum ratio; HRV, heart rate variability; LF, low-frequency; HF, high-frequency; CVR-R, coefficient of variation of R-R intervals; HUT, head-up tilt; SBP, systolic blood pressure; DBP, diastolic blood pressure; HR, heart rate.