| Abbreviations | Meaning |
 | BHAT | Beta Blocker Heart Attack Trial |
| HSEP | Heart Synchronized Evoked Potential |
| RHD | Rheumatic Heart Disease |
| HDRF | Heart Disease Research Foundation |
| HLM | Heart-lung Machine |
| HW | Half-width; Healing Well; Heart Weight; Hypertriglyceridemic Waist |
| S1-S4 | First To Fourth Heart Sounds |
| OHT | Ocular Hypertension; Orthotopic Heart Transplantation; Oslo Heart Trial |
| ACHIEVE | Accupril Congestive Heart Failure Investigation And Economic Variable Evaluation |
| MHFT | Munich Mild Heart Failure Trial |
| IK | Potassium Current [heart Electrophysiology] |
| CHB | Chronic Hepatitis B; Complete Heart Block; Congenital Heart Block |
| BRHS | British Regional Heart Study |
| FHNH | Fetal Heart Not Heard |
| CHFDT | Congestive Heart Failure Data Tool |
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