Table 2. CCTA and CT-FFR Features of Myocardial Bridging.
| All Patients (n = 75) | Patients with Myocardial Bridging-Related Myocardial Ischemia (n = 12) | Patients without Myocardial Bridging-Related Myocardial Ischemia (n = 63) | P | ||
|---|---|---|---|---|---|
| Myocardial bridging length, mm* | 26.62 ± 13.08 | 32.03 ± 16.65 | 25.59 ± 12.18 | 0.119 | |
| Myocardial bridging depth, mm† | 0.81 (0.44–1.42) | 1.44 (0.75–2.84) | 0.78 (0.27–1.30) | 0.021 | |
| Superficial myocardial bridging, number (%) | 61 (81) | 7 (58) | 54 (86) | 0.027 | |
| Depth myocardial bridging, number (%) | 14 (19) | 5 (42) | 9 (14) | 0.027 | |
| CT-FFRsystolic† | 0.90 (0.85–0.94) | 0.85 (0.81–0.89) | 0.91 (0.88–0.96) | 0.043 | |
| ΔCT-FFRsystolic† | 0.04 (0.01–0.09) | 0.12 (0.08–0.17) | 0.04 (0.01–0.07) | < 0.001 | |
| CT-FFRdiastolic† | 0.91 (0.85–0.95) | 0.87 (0.84–0.91) | 0.91 (0.86–0.94) | 0.548 | |
| ΔCT-FFRdiastolic† | 0.03 (0.02–0.08) | 0.07 (0.03–0.10) | 0.03 (0.01–0.06) | 0.096 | |
CT-FFR was measured within 1 cm to the distal end of myocardial bridging. ΔCT-FFR was measured as the difference of CT-FFR value between proximal and distal end of myocardial bridging. *Data are mean ± standard deviation, †Data are the median, with the interquartile range in parentheses. CCTA = coronary CT angiography, FFR = fractional flow reserve