| Abbreviations | Meaning |
 | FHR | Familial Hypophosphatemic Rickets; Fetal Heart Rate |
| TNT | Treatment To New Target [study Of Effectiveness Of Atorvastatin In Coronary Heart Disease] |
| GWTG | Get With The Guidelines [American Heart Association] |
| FH | Fetal Heart |
| WHT | Walsh-Hadamard Transform; Warm Heart Trial |
| HW | Half-width; Healing Well; Heart Weight; Hypertriglyceridemic Waist |
| RT | [heart] Repolarization Time |
| APPROACH | Alberta Provincial Project For Outcomes Assessment In Coronary Heart Disease |
| TAH | Total Abdominal Hysterectomy; Total Artificial Heart |
| IHR | International Health Regulations; Intrahepatic Resistance; Intrinsic Heart Rate |
| ASHD | Arteriosclerotic Heart Disease; Atrioseptal Heart Disease |
| APDP | [heart] Action Potential Duration-premature Stimulus |
| PSHD | Pseudoheart Disease |
| ACHIEVE | Accupril Congestive Heart Failure Investigation And Economic Variable Evaluation |
| HD | Heart Disease |
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