Key result
Right stellate ganglion block resulted in a higher incidence of 25-49 mmHg decreases in systolic blood pressure compared to left block (10.93% vs 8.43%), as well as greater heart rate reductions.
Why the study?
Does right stellate ganglion block affect systolic blood pressure and heart rate differently compared to left stellate ganglion block?
Observational (n=30,170)
Does right stellate ganglion block affect systolic blood pressure and heart rate differently compared to left stellate ganglion block?
Absolute Event Rate: 10.93% vs 8.43%
Right stellate ganglion block produces a higher incidence of significant reductions in systolic blood pressure and heart rate compared to left block, highlighting hemispheric asymmetry in autonomic cardiovascular control.
Right stellate ganglion block may cause more pronounced hemodynamic changes than left; leaves open optimal laterality pending randomized confirmation.
Purpose: Whether or not right and left stellate ganglion blocks (SGB) affect blood pressure (BP) and heart rate (HR) differently has been controversial. The aim of this study was to analyze BP and HR changes after large numbers of right or left SGBs. Methods: A total of 16,404 right SGBs and 13,766 left SGBs were performed with 6 ml of 1% mepivacaine using the anterior paratracheal approach at C6. Changes in systolic BP and HR 30 min after SGBs were compared to the baseline values. Results: Systolic BP decreased by 25 to 49 mmHg in 10.93% and more than 50 mmHg in 0.67% of 16,404 right SGBs. Those percentages were significantly higher than corresponding percentages; 8.43% and 0.49% of 13,766 left SGBs (P -49 mmHg in 5.74% and more than 50 mmHg in 0.52% of left SGBs, and in 4.15% and 0.18% of right SGBs (P Right SGB caused marked reduction in HR (greater than 30 beats/min), more than left SGB (4.22% versus 2.70%, P Conclusions: Both right and left SGBs could produce clinically significant hypertension and hypotension, and also severe bradycardia. However, right SGB produces a higher incidence of significant reductions in systolic BP and HR, compared to left SGB. On the other hand, left SGB produces a significant increase in systolic BP compared to right SGB. Those differences likely stem from the hemispheric asymmetry in autonomic cardiovascular control.
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Yokota et al. (2013) reported an observational. Right stellate ganglion block vs. Left stellate ganglion block was evaluated on Decrease in systolic blood pressure by 25 to 49 mmHg at 30 minutes. Right stellate ganglion block resulted in a higher incidence of 25-49 mmHg decreases in systolic blood pressure compared to left block (10.93% vs 8.43%), as well as greater heart rate reductions.
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