| Abbreviations | Meaning |
 | H&L | Heart And Lung [machine] |
| FHT | Fetal Heart Tones |
| ICHD | Inter-Society Commission For Heart Disease Resources |
| QHFT | Quinapril Heart Failure Trial |
| IK-ACH | Acetylcholine-induced Potassium Current [heart Electrophysiology] |
| HAPPHY | Heart Attack Primary Prevention In Hypertension |
| PMHR | Predicted Maximum Heart Rate |
| SDHD | Sudden Death Heart Disease |
| CHS | Copenhagen City Heart Study |
| IHHS | Idiopathic Hyperkinetic Heart Syndrome |
| MRC/BHF | Medical Research Council, British Heart Foundation Heart Protection Study |
| LHT | Left Hypertropia; Lifestyle Heart Trial |
| HHD | High Heparin Dose; Home Hemodialysis [telemedicine]; Hypertensive Heart Disease |
| MHS | Minnesota Heart Survey |
| HI | Heart Infusion |
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