# Evaluating the Effectiveness of Sildenafil at Improving Health Outcomes and Exercise Ability in People With Diastolic Heart Failure (The RELAX Study)

> **NCT00763867** · PHASE3 · COMPLETED · sponsor: **Duke University** · enrollment: 216 (actual)

## Conditions studied

- Heart Failure

## Interventions

- **DRUG:** Placebo
- **DRUG:** Sildenafil

## Key facts

- **NCT ID:** NCT00763867
- **Lead sponsor:** Duke University
- **Sponsor class:** OTHER
- **Phase:** PHASE3
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2008-09
- **Primary completion:** 2012-09
- **Final completion:** 2012-09
- **Target enrollment:** 216 (ACTUAL)
- **Last updated:** 2014-07-23

## Collaborators

- [object Object]
- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00763867

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00763867, "Evaluating the Effectiveness of Sildenafil at Improving Health Outcomes and Exercise Ability in People With Diastolic Heart Failure (The RELAX Study)". Retrieved via AI Analytics 2026-06-16 from https://api.ai-analytics.org/clinical/NCT00763867. Licensed CC0.

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