HRV	Heart rate variability
ECG	Electrocardiogram
HF	Power in high-frequency range
LF/HF	Ratio of low-to-high-frequency power
VLF	Power in very-low-frequency range
LF	Power in low-frequency range
TP	Total power
SDNN	Standard deviation of all normal-to-normal beat intervals
rMSSD	Square root of the mean of the square of successive normal-to-normal beat intervals
NLP	natural language processing
LLM	large language model
COT	chain-of-thought
ANS	autonomic nervous system
CDSS	Clinical Decision Support System
MLRD	Medical Literature Review Database