| Abbreviations | Meaning |
 | HWBW | Heart Weight To Body Weight [ratio] |
| FHR | Familial Hypophosphatemic Rickets; Fetal Heart Rate |
| DAH | Diffuse Alveolar Hemorrhage; Disordered Action Of The Heart |
| WHT | Walsh-Hadamard Transform; Warm Heart Trial |
| M1 | Mitral Component [first Heart Sound]; Mitral First [sound]; Myeloblast; Slight Dullness |
| CEHC | Calf Embryonic Heart Cell; Cost-effective Healthcare |
| PMHR | Predicted Maximum Heart Rate |
| CHB | Chronic Hepatitis B; Complete Heart Block; Congenital Heart Block |
| ESCAPE | Evaluation Study Of Congestive Heart Failure And Pulmonary Artery Catheterization Effectiveness |
| HLT | Heart-lung Transplantation; High-L-leucine Transport; Human Lipotropin; Human Lymphocyte Transformation |
| TAH | Total Abdominal Hysterectomy; Total Artificial Heart |
| THR | Targeted Heart Rate; Threonine; Thyroid Hormone Receptor; Total Hip Replacement; Transhepatic Resistance |
| NPHS | National Population Health Survey [Canada]; Northwick Park Heart Study |
| MRC/BHF | Medical Research Council, British Heart Foundation Heart Protection Study |
| CHOICES | Cancer, Heart Disease, Osteoporosis Interventions, And Community Evaluation Studies |
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