Spinal anesthesia-induced hypotension is caused by a decrease in stroke volume in elderly patients.

Conclusion: CO and blood pressure decreased significantly after the onset of SA in elderly patients. This is mainly caused by a decrease in SV and not by a decrease in SVR. There was no difference in CO and blood pressure change between dosages of 10 or 15 mg bupivacaine. PMID: 30881108 [PubMed]
Source: Local and Regional Anesthesia - Category: Anesthesiology Tags: Local Reg Anesth Source Type: research