Frequency of Electrical Acupoint Stimulation on Hypotension in TAVR Patients

Inclusion Criteria: * The age of the patients is 60 years or older; * Patients who are scheduled to undergo TAVR surgery under general anesthesia; Exclusion Criteria: * Body mass index less than 18 kg/m2 or greater than 30 kg/m2; * Hemodynamic instability (severe arrhythmia, decompensated heart failure); * Hypotension after admission requiring intervention with vasoactive drugs; * Severe liver or kidney dysfunction; * Those who are contraindicated for electrical stimulation, including those with local skin damage, infection, or having implanted electrophysiological devices in the body.