Clinical Study
Evaluation of Left Main Coronary Artery Using Optical Frequency Domain Imaging and Its Pitfalls
Table 2
OFDI analysis of the study population.
| | All (n = 42) |
| | OFDI characteristics | | | LM length (mm) | 10.1 ± 4.5 | | LM reference LA (mm2) | 14.9 ± 4.8 | | Proximal LAD reference LA (mm2) | 7.8 ± 3.2 | | Proximal LCX reference LA (mm2) | 7.8 ± 4.6 | | OFDI signs of LM atherosclerosis | 32 (76.2%) | | LM stenosis (%) [range] | 26 ± 18 [7–76] | | Tightest lesion site | | | Proximal LM | 3 (9.4%) | | Mid LM | 1 (3.1%) | | Distal LM | 13 (40.6%) | | Ostial LAD | 11 (34.4%) | | Ostial LCX | 4 (12.5%) |
| | OFDI imaging analysis | | | Global LM analysis | | | Quadrants with artifacts/total quadrants | 1207/13540 | | Artifacts (%) [range] | 8.9 [0–55.6] | | Analyzable quadrants per frame | 3.6 ± 0.5 | | Proximal LM | | | Quadrants with artifacts/total quadrants | 835/4472 | | Artifacts (%) [range] | 18.6 [0–100] | | Analyzable quadrants per frame | 3.3 ± 1 | | Mid LM | | | Quadrants with artifacts/total quadrants | 223/4516 | | Artifacts (%) [range] | 5.8 [0–62.5] | | Analyzable quadrants per frame | 3.8 ± 0.5 | | Distal LM | | | Quadrants with artifacts/total quadrants | 149/4552 | | Artifacts (%) [range] | 3.6 [0–46.6] | | Analyzable quadrants per frame | 3.9 ± 0.4 | | Ostial LAD | | | Quadrants with artifacts/total quadrants | 172/5800 | | Artifacts (%) [range] | 2.6 [0–47.8] | | Analyzable quadrants per frame | 3.9 ± 0.4 | | Ostial LCX | | | Quadrants with artifacts/total quadrants | 0/1124 | | Artifacts (%) [range] | 0 [0–0] | | Analyzable quadrants per frame | 0 ± 0 |
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CABG = coronary artery bypass graft; eGFR = estimated glomerular filtration rate; LA = lumen area; LAD = left anterior descending artery; LCX = left circumflex artery; LM = left main; OFDI = optical frequency domain imaging.
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