Myocardial ¹²³I-MIBG Uptake and Cardiovascular Autonomic Function in Parkinson’s Disease

Table 2

Correlation between MIBG scintigraphy and autonomic function tests.

	Early H/M ratio; ( value)	Delayed H/M ratio; ( value)	Washout rate; ( 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)
CV	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 () correlation. MIBG, ¹²³I-metaiodobenzylguanidine myocardial scintigraphy; H/M ratio, heart to mediastinum ratio; HRV, heart rate variability; LF, low-frequency; HF, high-frequency; CV, coefficient of variation of R-R intervals; HUT, head-up tilt; SBP, systolic blood pressure; DBP, diastolic blood pressure; HR, heart rate.