| Abbreviations | Meaning |
 | FHT | Fast Hartley Transform; Fetal Heart; Fetal Heart Tone |
| THR | Targeted Heart Rate; Threonine; Thyroid Hormone Receptor; Total Hip Replacement; Transhepatic Resistance |
| HE | Heart |
| EIHDW | Evaluation Of Ischemic Heart Disease In Women [study] |
| RHR | Renal Hypertensive Rat; Resting Heart Rate |
| QTC, Q-TC | Q-T Interval Corrected For Heart Rate |
| HI | Heart Infusion |
| S1-S4 | First To Fourth Heart Sounds |
| CHARGE | Coloboma, Heart Disease, Atresia Choanae, Retarded Growth And Retarded Development And/or CNS Anomalies, Genital Hypoplasia, And Ear Anomalies And/or Deafness [syndrome] |
| IHD | Ischemic Heart Disease |
| ALLHAT | Antihypertensive And Lipid-Lowering Treatment To Prevent Heart Attack Trial |
| MDHR | Maximum Determined Heart Rate |
| PHAVER | Pterygia-heart Defects-autosomal Recessive Inheritance-vertebral Defects-ear Anomalies-radial Defects [syndrome] |
| SYMPHONY | Sibrafiban Vs Aspirin To Yield Maximum Protection From Ischemic Heart Events Postacute Coronary Syndromes [trial] |
| HWI | Heart Work Index |
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