| Abbreviations | Meaning |
 | HHT | Head Halter Traction; Hereditary Hemorrhagic Telangiectasia; Heterotopic Heart Transplantation; Homoharringtonine; Hydroxyheptadecatrienoic Acid |
| SAHS | San Antonio Heart Study; Sleep Apnea-hypersomnolence [syndrome] |
| CNTHM | Conotruncal Heart Malformation |
| RCHF | Right Congestive Heart Failure |
| CLH | Chronic Lobular Hepatitis; Cleft Limb-heart [syndrome]; Corpus Luteum Hormone; Cutaneous Lymphoid Hyperplasia |
| AHMA | Antiheart Muscle Autoantibody |
| AHF | Acute Heart Failure; American Health Foundation; American Hepatic Foundation; American Hospital Formulary |
| HM | Heart Murmur |
| ICL | Chloride Ionic Current [heart Electrical Activity] |
| CSCHDS | Caerphilly And Speedwell Collaborative Heart Disease Studies |
| CHD | Coronary Heart Disease |
| SDHD | Sudden Death Heart Disease |
| HEFT | Heart Failure Trial |
| BHF | Bolivian Hemorrhagic Fever; British Heart Foundation |
| SP | Slow Pathway [heart Electrical Activity] |
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