Table 3 Coronary blood flow, flow velocity, and microvascular resistance derived from CCTA.
| Â | N of vessel | CBF (ml/min) | CBF per myocardium (g) (ml/g/min) | Luminal volume (cm3) | Mean luminal area (mm2) | Flow velocity (cm/sec) | Microvascular resistance (mmHg/cm/sec) | TAG (HU/cm) |
|---|---|---|---|---|---|---|---|---|
All | 290 | 43.7 (28.0–61.2) | 0.87 (0.68–1.00) | 0.90 (0.62–1.23) | 7.38 (5.85– 9.29) | 19.0 (14.0–24.6) | 4.6 (3.6–6.3) | −16.8 (−24.0–−11.9) |
DS = 0% | 185 | 44.2 (27.6–47.6) | 0.91 (0.76–1.04) | 0.94 (0.61–1.28) | 7.80 (6.35–9.70) | 18.2 (13.6–23.5) | 5.0 (3.9–6.7) | −17.0 (−23.5–−11.8) |
DS = 1–49% | 34 | 47.3 (30.3–65.0) | 0.84 (0.70–0.98) | 0.83 (0.64–1.10) | 6.28 (5.36–7.73) | 23.6 (17.3–29.6) | 3.8 (3.0–5.1) | −14.8 (−22.6–−10.5) |
DS = 50–69% | 38 | 37.3 (27.2–64.1) | 0.69 (0.59–0.80) | 0.80 (0.57–0.96) | 6.07 (4.99–7.34) | 20.3 (15.0–27.9) | 4.0 (3.0–5.5) | −16.0 (−20.1–−13.5) |
DS ≥ 70% | 33 | 31.2 (29.3–46.9) | 0.64 (0.54–0.76) | 0.74 (0.60–1.02) | 6.25 (5.70–7.65) | 17.4 (14.2–23.5) | 3.7 (2.7–4.5) | −24.1 (−27.9–−17.3) |
p for trend | Â | 0.31 | <0.001 | 0.036 | <0.001 | 0.05 | 0.002 | 0.31 |
