2.2. Exclusion criteria
circulatory dysfunction, arrhythmia
ARRHYTHMIA, BRADYARRHYTHMIA
The exclusion criteria were as follows: (1) did not sign the informed consent form, (2) severe circulatory dysfunction or arrhythmia, especially bradyarrhythmia, (3) use of sedative or antipsychotic drugs within 30 days before surgery,