| 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] |