| Abbreviations | Meaning |
 | IKADO | Outward Inwardly Rectifying Potassium Current [heart Electrophysiology] |
 | IHR | Intrinsic Heart Rate |
 | LIHFE | Living With Heart Failure [questionnaire] |
 | HHS | Hyperkinetic Heart Syndrome |
 | CHF | Congestive Heart Failure |
 | HIB | Heart Infusion Broth; Hemolytic Immune Body; Haemophilus Influenzae Type B [vaccine] |
 | HRMAX | Maximal Heart Rate |
 | CHS | Copenhagen City Heart Study |
 | SDHD | Sudden Death Heart Disease |
 | BHIRS | Brain-heart Infusion And Rabbit Serum |
 | IDHS | Indian Diet Heart Study |
 | MERIT-HF | Metoprolol Controlled-release Randomised Intervention Trial In Heart Failure |
 | SDIHD | Sudden Death Ischemic Heart Disease |
 | STRETCH | Symptom Tolerability Response To Exercise Trial Of Candesartan Cilexetil In Patients With Heart Failure |
 | APD | Action Potential Duration [of Heart] |