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Inclusion criteria
| Performed CAG |
| Visually estimated lumen stenosis of 35–90% |
| Investigated CA diameter above 2 mm in size |
| Indications for treatment of the investigated CA |
| Physiology assessment performed by either FFR, QFR or iFR |
| Available procedure data on fluoroscopy time and dose area product |
CA – coronary artery, CAG – coronary artery angiography, FFR – fractional flow reserve, iFR – instantaneous wave-free ratio, QFR – quantitative flow ratio.
