| Abbreviations | Meaning |
 | L/H | Lung-to-heart [ratio] |
| BCHT | Bicaval Heart Transplantation |
| PHAVER | Pterygia-heart Defects-autosomal Recessive Inheritance-vertebral Defects-ear Anomalies-radial Defects [syndrome] |
| HLT | Heart-lung Transplantation; High-L-leucine Transport; Human Lipotropin; Human Lymphocyte Transformation |
| MHS | Minnesota Heart Survey |
| NPHS | National Population Health Survey [Canada]; Northwick Park Heart Study |
| RT | [heart] Repolarization Time |
| CHB | Chronic Hepatitis B; Complete Heart Block; Congenital Heart Block |
| WHAT | Worcester Heart Attack Trial |
| HWBW | Heart Weight To Body Weight [ratio] |
| CHLS | Combined Heart And Lung Surgery |
| HHS | Honolulu Heart Study |
| SHS | Sayre Head Sling; Sheep Hemolysate Supernatant; Strong Heart Study; Sutterland-Haan Syndrome |
| UHR | Underlying Heart Rhythm |
| IKP | Plateau Potassium Current [heart Electrophysiology] |
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