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

Table 3

Changes in HRV parameters before and after ST36 acupuncture.

	Before	After	𝑃 value
LF power (ms^2)	1437.1±805.9	1280.4±820.1	0.721
HF power (ms^2)	856.2±464.6	1072.1±457.4	0.037
LF/HF ratio	1.87±1.04	1.26±0.71	0.028

HRV, heart rate variability; LF, low-frequency; HF, high-frequency.