Key result
Spinal anesthesia maintained a more stable sympathovagal balance (LF/HF ratio) during surgery compared to general anesthesia, though both resulted in a postoperative decrease in all HRV bands.
Why the study?
Does spinal anesthesia compared to general anesthesia improve heart rate variability stability in elderly patients with high risk of ischemic heart disease undergoing major noncardiac surgery?
Population
40 elderly patients with a high risk of ischemic heart disease undergoing major noncardiac surgery
Comparison
Spinal anesthesia vs General anesthesia
Design
RCT, randomly assigned
Follow-up
until the third postoperative day
Authors
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Spinal anesthesia may be favored intraoperatively for autonomic stability in high-risk elderly patients; extends RCT evidence on anesthesia-HRV effects while highlighting postoperative depression.
RCT (n=40)
Randomly assigned
Does spinal anesthesia compared to general anesthesia improve heart rate variability stability in elderly patients with high risk of ischemic heart disease undergoing major noncardiac surgery?
Spinal anesthesia maintains intraoperative sympathovagal balance better than general anesthesia in high-risk cardiac patients, though both techniques result in prolonged postoperative autonomic depression.
Backlund et al. (1999) conducted an RCT in High risk of ischemic heart disease undergoing major noncardiac surgery (n=40). Spinal anesthesia vs. General anesthesia was evaluated on Changes in heart rate variability (HRV) frequency bands. Spinal anesthesia maintained a more stable sympathovagal balance (LF/HF ratio) during surgery compared to general anesthesia, though both resulted in a postoperative decrease in all HRV bands.
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