| Multiple Risk Factor Intervention Trial for the Prevention of Coronary Heart Disease (MRFIT) (NCT00000487) | University of Minnesota | 1972-06-01 |
| Unstable Angina Pectoris Trial (NCT00000486) | National Heart, Lung, and Blood Institute (NHLBI) | 1972-01-01 |
| NHLBI Type II Coronary Intervention Study (NCT00000594) | National Heart, Lung, and Blood Institute (NHLBI) | 1971-11-01 |
| Muscatine Heart Study (NCT00005127) | National Heart, Lung, and Blood Institute (NHLBI) | 1971-06-01 |
| Hypertension Detection and Follow-up Program (HDFP) (NCT00000485) | National Heart, Lung, and Blood Institute (NHLBI) | 1971-05-01 |
| NAS-NRC Twin Registry (NCT00005125) | National Heart, Lung, and Blood Institute (NHLBI) | 1970-07-01 |
| National Heart, Lung, and Blood Institute Twin Study (NCT00005124) | National Heart, Lung, and Blood Institute (NHLBI) | 1969-07-01 |
| Treatment of Hypertension (NCT00000484) | National Heart, Lung, and Blood Institute (NHLBI) | 1966-04-01 |
| Honolulu Heart Program (NCT00005123) | National Heart, Lung, and Blood Institute (NHLBI) | 1965-07-01 |
| Coronary Drug Project (NCT00000482) | National Heart, Lung, and Blood Institute (NHLBI) | 1965-04-01 |
| Evans County Studies (NCT00005122) | National Heart, Lung, and Blood Institute (NHLBI) | 1958-07-01 |
| Framingham Heart Study (NCT00005121) | National Heart, Lung, and Blood Institute (NHLBI) | 1948-07-01 |
| Safety of Cardiac Pacemakers in 3 Tesla MRI (NCT00356330) | University Hospital, Bonn | |
| The Safety and Efficacy of Adjunct Carvedilol in Children With Moderate Heart Failure (NCT00004854) | National Center for Research Resources (NCRR) | |
| Effect of Pravastatin on Endothelial Dysfunction Following a Single High Fat Meal (NCT00005117) | National Center for Research Resources (NCRR) | |
| Women's Health Initiative (WHI) (NCT00000611) | National Heart, Lung, and Blood Institute (NHLBI) | |
| Pharmacokinetic and Pharmacodynamic Interaction Study of Digoxin and Hawthorn (NCT00006330) | National Center for Research Resources (NCRR) | |