| Variable ;Column;Definition |
| NYHA class;K;New York Heart Association classs |
| ALT o GPT (IU/L);AB;Alanine Aminotransferase or Glutamic Pyruvic Transaminase |
| AST o GOT (IU/L);AC;Aspartate Aminotransferase or Glutamyl oxaloacetic transaminase |
| HDL (mmol/L);AJ;High-density lipoprotein cholesterol |
| LDL (mmol/L);AL;Low Density Lipoprotein Cholesterol |
| Pro-BNP (ng/L);AN;pro b-type natriuretic peptide |
| T3 (pg/dL);AP;Triiodothyronine |
| T4 (ng/L);AQ;Thyroxine |
| TSH (mIU/L);AS;Thyroid Stimulating Hormone |
| LVEF (%);AZ;Left Ventricular Ejection Fraction |
| SDNN (ms);CI;Standard deviation of NN intervals |
| SDANN (ms);CJ;Standard deviation of the average NN intervals for each 5?min segment of a 24?h HRV recording |
| RMSSD (ms);CK;Root mean square of successive RR interval differences |
| pNN50 (%);CL;Percentage of successive RR intervals that differ by more than 50?ms |
| ACE inhibitor;CX;Angiotensin-converting enzyme inhibitors |