The Effect of Chunghyul-Dan on Hyperventilation-Induced Carbon Dioxide Reactivity of the Middle Cerebral Artery in Normal Subjects: A Dose-Dependent Study

Table 3

Changes in corrected blood flow velocity at = 40 mmHg (CV40, cm/sec) before and after CHD administration.

()		(T0) Before administration	After administration
			T1 (1 hr)	T2 (2 hr)	T3 (3 hr)
Control						0.002	0.071
CHD	300 mg						0.061
CHD	600 mg						0.024
CHD	1200 mg						0.255

Mean ± SD values are shown. CHD, chunghyul-dan; hr, hour.
: time × treatment interaction by two-way repeated measures analysis of variation (RM ANOVA).
No significant difference between each group (Bonferroni multiple comparisons).
: time effect of individual treatment by one-way RM ANOVA.
No significant difference between individual time points (Bonferroni multiple comparisons).