Effect of ST36 Acupuncture on Hyperventilation-Induced CO₂ Reactivity of the Basilar and Middle Cerebral Arteries and Heart Rate Variability in Normal Subjects

Figure 3

Correlation analysis between the percentage changes in CO₂ reactivity and HF power before and after ST36 acupuncture treatment. (a) A significant correlation is shown between acupuncture-induced changes in HF power and the CO₂ reactivity of the contralateral MCA (𝑃=0.047, 𝑟=0.639). (b) The correlation between the percentage changes in the CO₂ reactivity of the ipsilateral MCA and HF power was slightly greater than the significance cut-off (𝑃=0.057, 𝑟=0.618).

(a)

(b)