| Abbreviations | Meaning |
 | WASH | Warfarin-Aspirin Study Of Heart Failure |
 | AH | Artificial Heart |
 | HRRI | Heart Rate Retardation Index |
 | MHHS | Minnesota Heart Health Survey |
 | FHS | Fetal Heart Sound |
 | FHH | Familial Hypocalciuric Hypercalcemia; Fawn-hooded Hypertensive [rat]; Fetal Heart Heard |
 | CCHP | Consumer Choice Health Plan; Corpus Christi Heart Project |
 | IF | Hyperpolarization-activated Current [heart Electrical Activity] |
 | HT | Heart |
 | SYMPHONY | Sibrafiban Vs Aspirin To Yield Maximum Protection From Ischemic Heart Events Postacute Coronary Syndromes [trial] |
 | IHR | International Health Regulations; Intrahepatic Resistance; Intrinsic Heart Rate |
 | CHAPS | Carvedilol Heart Attack Pilot Study; 3[3-cholaminopropyl Diethylammonio]-1-propane Sulfonate |
 | H&L | Heart And Lung [machine] |
 | BHS | Brisighella Heart Study |
 | ELVD-CHF | Exercise In Left Ventricular Dysfunction And Chronic Heart Failure [trial] |