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Motorized fractional flow reserve pullback: Accuracy and reproducibility.
Jeroen Sonck1,2, Carlos Collet1, Takuya Mizukami1,3,4
1Cardiovascular Center Aalst, OLV Clinic, Aalst, Belgium.
Summary
Motorized fractional flow reserve (FFR) pullbacks accurately assess epicardial resistance in coronary artery disease. This technique demonstrates high reproducibility, aiding in treatment planning for intermediate coronary stenosis.
Area of Science:
- Cardiovascular research
- Interventional cardiology
- Diagnostic imaging
Background:
- Fractional flow reserve (FFR) guides myocardial revascularization decisions.
- FFR pullbacks assess epicardial resistance distribution along coronary vessels.
Purpose of the Study:
- To determine the accuracy and reproducibility of motorized FFR pullbacks.
- To evaluate FFR pullback measurements in stable coronary artery disease patients.
Main Methods:
- Acquired duplicated motorized FFR pullbacks at 1 mm/s in intermediate coronary stenosis.
- Measured single FFR values at anatomical landmarks.
- Assessed agreement using Bland-Altman, Pearson's correlation, and area under the pullback curve (AUPC).
Main Results:
- Mean FFR from pullbacks was 0.91 ± 0.08; distal FFR was 0.85 ± 0.09.
- Mean difference between pullbacks was -0.002 (LOA -0.058 to 0.054).
- High repeatability was observed for distal FFR measurements (bias -0.003, LOA -0.046 to 0.041).
Conclusions:
- Motorized FFR pullback is accurate for assessing epicardial resistance distribution.
- The FFR pullback technique shows high reproducibility in intermediate coronary artery disease.
- Further research is needed to explore hyperemic FFR pullback strategies for clinical decision-making.
