# Fractional Flow Reserve (FFR) Versus Instant Wave-Free Ratio (iFR)

> **NCT01559493** · — · COMPLETED · sponsor: **NHS National Waiting Times Centre Board** · enrollment: 200 (actual)

## Conditions studied

- Coronary Artery Disease
- Plaque, Atherosclerotic

## Interventions

_None listed._

## Key facts

- **NCT ID:** NCT01559493
- **Lead sponsor:** NHS National Waiting Times Centre Board
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** COMPLETED
- **Start date:** 2012-01
- **Primary completion:** 2012-02
- **Final completion:** 2012-02
- **Target enrollment:** 200 (ACTUAL)
- **Last updated:** 2012-03-21

## Collaborators

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## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT01559493

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT01559493, "Fractional Flow Reserve (FFR) Versus Instant Wave-Free Ratio (iFR)". Retrieved via AI Analytics 2026-06-24 from https://api.ai-analytics.org/clinical/NCT01559493. Licensed CC0.

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