| Abbreviations | Meaning |
 | BHFS | Benzapril Heart Failure Study |
| MPHR | Maximum Predicted Heart Rate |
| CHOICE | Caring For Hypertension On Initiation: Cost And Effectiveness [study]; Congestive Heart Failure Mortality: Investigation On Carvedilol's Efficacy |
| I(TO) | Transient Outward Current [heart Electrical Activity] |
| HWD | Heartworm Disease |
| HRT | Heart Rate; Heidelberg Retinal Tomography; Hormone Replacement Therapy; Hormone Replacement Trial |
| HEHR | Highest Equivalent Heart Rate |
| CHAOS | Cambridge Heart Antioxidant Study; Cardiovascular Disease, Hypertension And Hyperlipidemia, Adult-onset Diabetes, Obesity, And Stroke [study] |
| RHF | Restricted Hartree-Fock [level]; Right Heart Failure |
| H2 | Deuterium; Second [heart] Sound |
| SDHD | Sudden Death Heart Disease |
| BASH | Body Acceleration Synchronous With Heart Rate |
| ICL | Chloride Ionic Current [heart Electrical Activity] |
| HWBW | Heart Weight To Body Weight [ratio] |
| IK | Potassium Current [heart Electrophysiology] |
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