| Abbreviations | Meaning |
 | FHF | Fetal Heart Frequency; Fulminant Hepatic Failure |
| HS | Heart Sounds |
| AH | Artificial Heart |
| XISHF | Xamoterol In Severe Heart Failure [study] |
| BHR | Basal Heart Rate; Benign Hypertrophic Prostatitis; Borderline Hypertensive Rat; Bronchial Hyperreactivity |
| IB | Background Sodium Current [heart Electrical Activity] |
| EH | Enlarged Heart |
| FHR | Fetal Heart Rate |
| NHI | National Heart Institute; Nuclear Hepatobiliary Imaging |
| DHFS | Diet-Heart Feasibility Study |
| RHRV | Relative Heart Rate Variability |
| HDH | Heart Disease History |
| CHAOS | Cambridge Heart Antioxidant Study; Cardiovascular Disease, Hypertension And Hyperlipidemia, Adult-onset Diabetes, Obesity, And Stroke [study] |
| CHAPS | Carvedilol Heart Attack Pilot Study; 3[3-cholaminopropyl Diethylammonio]-1-propane Sulfonate |
| BHFS | Benzapril Heart Failure Study |
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