| Abbreviations | Meaning |
 | OHD | Hydroxylase Deficiency; Hydroxyvitamin D; Office Of Human Development; Ondine-Hirschsprung Disease; Organic Heart Disease |
| DRFS | Dundee Rank Factor Score [risk Factors In Coronary Heart Disease] |
| CHD | Congenital Or Congestive Heart Disease |
| NHLBI-ICD | National Heart, Lung And Blood Institute Implantable Cardioverter Defibrillator [trial] |
| HELP | Heart European Leaders Panel [study] |
| VHD | Valvular Heart Disease; Viral Hematodepressive Disease; Visible Human Dataset |
| OHS | Open Heart Surgery |
| LHT | Left Hypertropia; Lifestyle Heart Trial |
| RVHD | Rheumatic Valvular Heart Disease |
| THS | Teebe Hypertelorism Syndrome; Tetrahydro-compound S; Thrombohemorrhagic Syndrome; Tolosa-Hunt Syndrome; Tromso Study; Turkish Heart Study |
| HWD | Heartworm Disease |
| MHHS | Minnesota Heart Health Survey |
| SDIHD | Sudden Death Ischemic Heart Disease |
| RHF | Restricted Hartree-Fock [level]; Right Heart Failure |
| RHB | Regional Hospital Board [UK]; Right Heart Bypass |
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