| Abbreviations | Meaning |
 | CHLS | Combined Heart And Lung Surgery |
| CCHD | Cyanotic Congenital Heart Disease |
| RCHF | Right Congestive Heart Failure |
| RPP | Heart Rate-systolic Blood Pressure Product; Rate-pressure Produce; Retropubic Prostatectomy |
| HMO | Health Maintenance Organization; Heart Minute Output |
| BHF | Bolivian Hemorrhagic Fever; British Heart Foundation |
| HLK | Heart, Liver, Kidney |
| MDHR | Maximum Determined Heart Rate |
| CHANGE | Chronic Heart Failure And Graded Exercise [study] |
| HT | Heart Transplantation, Heart Transplant |
| LHF | Left Heart Failure |
| FHH | Familial Hypocalciuric Hypercalcemia; Fawn-hooded Hypertensive [rat]; Fetal Heart Heard |
| H&L | Heart And Lung [machine] |
| PMHR | Predicted Maximum Heart Rate |
| HRA | Heart Rate Audiometry |
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