Evaluating the Effectiveness of Sildenafil at Improving Health Outcomes and Exercise Ability in People With Diastolic Heart Failure (The RELAX Study)
Summary
The registered summary isn't in our current data snapshot. Read it on the ClinicalTrials.gov record ↗. Why? →
Investigators
The overall officials registered on this study. Names that resolve to a findmyKOL profile link to it; the rest are shown as registered.
- Eugene Braunwald, MD
Harvard University
Study Chair - Kerry L. Lee, PhD
Duke Clinical Research Institute
Principal Investigator
A profile link is shown only when the registered name resolves to a person record with a confident, namesake-checked match; ambiguous names stay unlinked.
Sites
10 registered facilities, with the per-site recruitment status where the registry publishes one. ClinicalTrials.gov does not publish per-site enrollment counts.
- Montreal Heart Institute
Montreal, Quebec, Canada
- Mayo Clinic Arizona
Phoenix, Arizona, United States
- Morehouse School of Medicine
Atlanta, Georgia, United States
- Brigham and Women'S Hospital
Boston, Massachusetts, United States
- Minnesota Heart Failure Network
Minneapolis, Minnesota, United States
- Mayo Clinic
Rochester, Minnesota, United States
- Duke University Medical Center
Durham, North Carolina, United States
- Baylor College of Medicine
Houston, Texas, United States
- University of Utah Health Sciences Center
Murray, Utah, United States
- University of Vermont - Fletcher Allen Health Care
Burlington, Vermont, United States
Site investigator names are published by ClinicalTrials.gov only while a study recruits, so completed studies list sites without them.
Drugs studied
No drug or biological interventions are in our data for this study — it may test a procedure, device or behavioral intervention, or the intervention list isn't in our current snapshot. See the registry record ↗. Why? →
Registration & key dates
Registry attributes as recorded on the ClinicalTrials.gov study record.
- Start
- 30 Sept 2008
- Primary completion
- 30 Sept 2012
- Completion
- 30 Sept 2012
- Last update posted
- 23 Jul 2014
- Registered enrollment
- 216
- Registry id
- NCT00763867
Source: ClinicalTrials.gov, via the CTTI AACT database, data as of 12 Jul 2026. Registry facts are shown as registered by the study sponsor; findmyKOL does not interpret them.