Why the study?
Does unilateral stellate ganglion block alter heart rate variability in patients with head and neck pain?
Does unilateral stellate ganglion block alter heart rate variability in patients with head and neck pain?
Answers are grounded in this paper and cite their sources.
Left-sided, but not right-sided, stellate ganglion block increases parasympathetic activity as measured by heart rate variability in patients with head and neck pain.
BACKGROUND: The effect of the unilateral stellate ganglion block (SGB) on cardiovascular regulation remains controversial. We wished to evaluate the changes in heart rate variability (HRV) after a unilateral stellate ganglion block in patients with head and neck pain in the present study. METHODS: Patients with head and neck pain (n = 89) were studied. HRV was determined before and after a C6 unilateral stellate ganglion block (right-sided SGB, 40; left-sided SGB, 49) using a paratracheal technique with 1% mepivacaine (6 ml). RESULTS: There were no significant differences in HRV indices before and after right-sided SGB. The log scale of power in the high frequency range (lnHF) was increased and ratio of power in the low frequency range (LF) to power in the high frequency range (HF) ratio was decreased after left-sided SGB. CONCLUSIONS: These results demonstrated that left-sided SGB increased parasympathetic activities in patients with head and neck pain.
No takes yet. Share an insight, caveat, or question.
Kim et al. (2010) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: