Table 2 Specific reasons for deferral of revascularization in patients with FFR ≤ 0.80 and CFR > 2.0.

From: Non-randomized comparison between revascularization and deferral for intermediate coronary stenosis with abnormal fractional flow reserve and preserved coronary flow reserve

Reasons for deferral of revascularization

Proportion in deferral group

Minimal stenosis on angiography

32.3% (32)

Good exercise performance with tolerable symptom and negative non-invasive tests

17.2% (17)

Diffuse disease without focal stenosis in FFR pullback curve

15.2% (15)

Gray zone FFR with preserved CFR

15.2% (15)

Not suitable for PCI based on clinical condition or technical reason

9.1% (9)

No angiographic progression since previous angiography

8.1% (8)

Small myocardial territory or limited viability

3.0% (3)

  1. Values are proportion (patient number).
  2. CFR Coronary flow reserve, FFR Fractional flow reserve, PCI Percutaneous coronary intervention.
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