| Abbreviations | Meaning |
 | LHS | Left Heart Strain |
| CHD | Congenital Heart Disease |
| CHIME | Coloboma, Heart Anomaly, Ichthyosis, Mental Retardation, Ear Abnormality |
| HERS | Heart And Estrogen-Progestin Replacement Study |
| HDP | Heart Disease Program [computerized Diagnosis]; Hexose Diphosphate; High-density Polyethylene; Hydrogen Diphosphonate; Hydroxydimethylpyrimidine |
| MHS | Minnesota Heart Survey |
| NYHAFC | New York Heart Association Functional Class |
| TEAHAT | Thrombolysis Early In Acute Heart Attack Trial |
| FHR | Fetal Heart Rate |
| HAL | Heart Attacks In London [study] |
| PLET | Polymyxin, Lysosome, EDTA, Thallous Acetate [in Heart Infusion Agar] |
| HAPPHY | Heart Attack Primary Prevention In Hypertension |
| CHB | Chronic Hepatitis B; Complete Heart Block; Congenital Heart Block |
| LD1 | Isoenzyme Of Lactate Dehydrogenase Found In The Heart, Erythrocytes, And Kidneys |
| BHS | Bogalusa Heart Study |
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