| Abbreviations | Meaning |
 | CHT | Classical Heart Transplantation |
| HELP | Heart European Leaders Panel [study] |
| CCF | Congestive Heart Failure |
| CHD | Cyanotic Heart Disease |
| RHRV | Relative Heart Rate Variability |
| HASHD | Hypertensive Arteriosclerotic Heart Disease |
| HERS | Heart And Estrogen-Progestin Replacement Study |
| HS | Heart Sounds |
| NDHS | National Diet-Heart Study |
| HDP | Heart Disease Program [computerized Diagnosis]; Hexose Diphosphate; High-density Polyethylene; Hydrogen Diphosphonate; Hydroxydimethylpyrimidine |
| SOM | Sustained Outward Movement [heart] |
| GWTG | Get With The Guidelines [American Heart Association] |
| OHS | Open Heart Surgery |
| RIHD | Radiation-induced Heart Disease |
| HMO | Health Maintenance Organization; Heart Minute Output |
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