Sex-Based Differences in Hemodynamic Response to Anesthesia Type During TAVI and Early Transvalvular Gradient Changes

Area of Science:

• Cardiology
• Anesthesiology
• Medical Devices

Background:

• Anesthesia type may affect hemodynamics after transcatheter aortic valve implantation (TAVI).
• Sex-based differences in anesthetic response during TAVI are not well understood.
• Early hemodynamic changes, particularly transvalvular gradients, are crucial for TAVI outcomes.

Purpose of the Study:

• To assess sex-based differences in patient responses to general anesthesia (GA) versus monitored anesthesia care (MAC) during TAVI.
• To investigate the influence of anesthesia type and sex on post-TAVI transvalvular gradient changes.
• To identify factors affecting early hemodynamic performance after TAVI.

Main Methods:

• Retrospective cohort study of 693 patients undergoing TAVI.
• Patients categorized into four groups: GA-Male, MAC-Male, GA-Female, MAC-Female.
• Comparison of hemodynamic, anesthetic, echocardiographic, and 6-month outcomes.

Main Results:

• Initial analysis showed higher gradients in females, but this was driven by valve size differences.
• After adjusting for valve size, no significant gradient differences were found between sex-anesthesia groups.
• Anesthesia type, not sex, was associated with fluid balance and vasopressor needs, with GA requiring more support.

Conclusions:

• Early transvalvular gradients post-TAVI are primarily influenced by valve size, not sex or anesthesia type alone.
• Observed sex-based differences may stem from disparities in valve sizing.
• Further prospective studies are needed to clarify the independent roles of sex, anesthesia, and valve size in TAVI outcomes.