| Abbreviations | Meaning |
 | MHR | Maximal Heart Rate |
| HLT | Heart-lung Transplantation; High-L-leucine Transport; Human Lipotropin; Human Lymphocyte Transformation |
| CESNA II | Comparative Efficacy And Safety Of Nisoldipine And Amlodipine [in Hypertension With Ischemic Heart Disease] |
| S1-S4 | First To Fourth Heart Sounds |
| RT | [heart] Repolarization Time |
| IK | Potassium Current [heart Electrophysiology] |
| SACCAT | Stretch-activated Channel-cations [heart Contraction] |
| REACH | Research On Endothelin Antagonism In Chronic Heart Failure; Resource Utilization In Congestive Heart Failure [studies] |
| IDHS | Indian Diet Heart Study |
| CONGHD | Congenital Heart Disease |
| AHES | Artificial Heart Energy System |
| PMHR | Predicted Maximum Heart Rate |
| HRF | Heart Rate Fluctuations |
| BHIA | Brain-heart Infusion Agar |
| LHC | Langerhans Cell Histiocytosis; Left Heart Catheterization; Left Hypochondrium; Light-harvesting Complex; Local Health Council |
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