| Abbreviations | Meaning |
 | HRMAX | Maximal Heart Rate |
| COMMIT | Community Intervention Trial [for Smoking Cessation]; Comprehensive Multidisciplinary Interventional Trial [for Regression Of Coronary Heart Disease] |
| CHAPS | Carvedilol Heart Attack Pilot Study; 3[3-cholaminopropyl Diethylammonio]-1-propane Sulfonate |
| NDHS | National Diet-Heart Study |
| HDP | Heart Disease Program [computerized Diagnosis]; Hexose Diphosphate; High-density Polyethylene; Hydrogen Diphosphonate; Hydroxydimethylpyrimidine |
| VSHD | Ventricular Septal Heart Defect |
| HSEP | Heart Synchronized Evoked Potential |
| SAHS | San Antonio Heart Study; Sleep Apnea-hypersomnolence [syndrome] |
| HC | Heart Catheterization |
| H2 | Deuterium; Second [heart] Sound |
| RHMV | Right Heart Mixing Volume |
| CHLS | Combined Heart And Lung Surgery |
| CHT | Classical Heart Transplantation |
| H-L-K | Heart, Liver, And Kidneys |
| HV | Heart Volume |
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