| Abbreviations | Meaning |
 | PHR | Parent-held Record; Peak Heart Rate; Photoreactivity |
| AHF SCENE | Advanced Heart Failure Shared Clinical Experience Network |
| FHF | Fetal Heart Frequency; Fulminant Hepatic Failure |
| NHLI | National Heart And Lung Institute [NIH] |
| HMO | Health Maintenance Organization; Heart Minute Output |
| HHP | Honolulu Heart Program |
| BASH | Body Acceleration Synchronous With Heart Rate |
| ISHLT | The International Society For Heart And Lung Transplantation |
| RHR | Renal Hypertensive Rat; Resting Heart Rate |
| LHC | Langerhans Cell Histiocytosis; Left Heart Catheterization; Left Hypochondrium; Light-harvesting Complex; Local Health Council |
| CASCO | Calcium Sensitization In Congestive Heart Failure |
| FHH | Familial Hypocalciuric Hypercalcemia; Fawn-hooded Hypertensive [rat]; Fetal Heart Heard |
| LHS | Left Heart Strain |
| HCA | Heart Cell Aggregate |
| HIB | Heart Infusion Broth; Hemolytic Immune Body; Haemophilus Influenzae Type B [vaccine] |
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