| Abbreviations | Meaning |
 | HCA | Heart Cell Aggregate |
| HRF | Heart Rate Fluctuations |
| SIHDSPS | Stockholm Ischemic Heart Disease Secondary Prevention Study |
| CHARGE | Coloboma, Heart Disease, Atresia Choanae, Retarded Growth And Retarded Development And/or CNS Anomalies, Genital Hypoplasia, And Ear Anomalies And/or Deafness [syndrome] |
| LHS | Left Heart Strain |
| CHOICE | Caring For Hypertension On Initiation: Cost And Effectiveness [study]; Congestive Heart Failure Mortality: Investigation On Carvedilol's Efficacy |
| HHS | Honolulu Heart Study |
| HELP | Heart European Leaders Panel [study] |
| THS | Teebe Hypertelorism Syndrome; Tetrahydro-compound S; Thrombohemorrhagic Syndrome; Tolosa-Hunt Syndrome; Tromso Study; Turkish Heart Study |
| AHR | Atrial Heart Rate |
| EH | Enlarged Heart |
| BHAT | Beta Blocker Heart Attack Trial |
| MICRO-HOPE | Microalbuminuria, Cardiovascular And Renal Outcomes-Heart Outcomes Prevention Evaluation |
| AHA | Anti-heart Antibody; Antihistone Antibody; Area Health Authority; Arthritis-hives-angioedema [syndrome]; Aspartyl-hydroxamic Acid; Autoimmune Hemolytic Anemia |
| HDRF | Heart Disease Research Foundation |
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