Evaluating the Effectiveness of Sildenafil at Improving Health Outcomes and Exercise Ability in People With Diastolic Heart Failure (The RELAX Study)
Public ClinicalTrials.gov record NCT00763867. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
Phosphodiesterase-5 Inhibition to Improve Clinical Status and Exercise Capacity in Diastolic Heart Failure (RELAX)
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
Diastolic heart failure (DHF), which affects older individuals and women at a disproportionate rate, is a condition that can lead to shortness of breath and fluid build-up in the lungs. This study will evaluate the effectiveness of the medication sildenafil at improving exercise ability and health outcomes in people with DHF.
Study identification
- NCT ID
- NCT00763867
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Phase 3
- Enrollment
- 216 participants
Conditions and interventions
Conditions
Eligibility (public fields only)
- Age range
- 18 Years and older
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Sep 2008 (Type not available)
- Primary completion
- Sep 2012 (Actual)
- Completion
- Sep 2012 (Actual)
- Last update posted
- Jul 23, 2014
2008 – 2012
United States locations
- U.S. sites
- 9
- U.S. states
- 8
- U.S. cities
- 9
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Mayo Clinic Arizona | Phoenix | Arizona | 85054 | — |
| Morehouse School of Medicine | Atlanta | Georgia | 30310 | — |
| Brigham and Women's Hospital | Boston | Massachusetts | 02115 | — |
| Minnesota Heart Failure Network | Minneapolis | Minnesota | 55415 | — |
| Mayo Clinic | Rochester | Minnesota | 55905 | — |
| Duke University Medical Center | Durham | North Carolina | 27705 | — |
| Baylor College of Medicine | Houston | Texas | 77030 | — |
| University of Utah Health Sciences Center | Murray | Utah | 84107 | — |
| University of Vermont - Fletcher Allen Health Care | Burlington | Vermont | 05401 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
Non-U.S. locations
This page focuses on the U.S. directory. The official record also lists 1 non-U.S. site.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT00763867, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Jul 23, 2014 · Synced Oct 17, 2026
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Open the official record
The complete public registry record, listed eligibility criteria, and available contact information for NCT00763867 live on ClinicalTrials.gov.