Table 2.
Color Doppler quality in LMCA, LAD and LCx, before and after heart rate lowering.
| Color Doppler | PW Doppler | CF Length | |||||
|---|---|---|---|---|---|---|---|
| Score 1 | Score 2 | Score 3 | Score 1 | Score 2 | Score 3 | mm | |
| # (%) | # (%) | # (%) | # (%) | # (%) | # (%) | ||
| LMC b, 26 seg | 24 (92) | 1 (4) | 1 (4) | 24 (92) | 1 (4) | 1 (4) | - |
| LMC a, 26 seg | 0 (0) | 12 (46) | 14 (54) * | 0 (0) | 15 (58) | 10 (38) * | - |
| LAD prx, b 26 seg | 20 (77) | 6 (23) | 0 (0) | 20 (77) | 4 (15) | 2 (8) | - |
| LAD prx, a 26 seg | 0 (0) | 0 (0) | 26 (100) * | 0 (0) | 2 (8) | 24 (92) * | - |
| LAD mid, b 26 seg | 21(81) | 3(11) | 2 (8) | 22 (85) | 4(15) | 0 | |
| LAD mid, a 26 seg | 0 (0) | 3 (11) | 23 (88) * | 0 | 2 (8) | 24 (92) * | - |
| LAD dst, b 26 seg | 14 (54) | 9 (35) | 3 (11) | 13 (50) | 6 (23) | 7 (27) | - |
| LAD dst, a 26 seg | 1 (4) | 1 (4) | 24 (92) * | 1 (4) | 2 (8) | 23 (88) * | - |
| LCx b, 26 seg | 26 (100) | 0 | 0 | 26 (100) | 0 | 0 | 0 |
| LCx a, 26 seg | 0 | 9 (35) | 17 (65) * | 0 | 6 (23) | 20 (77) * | 23 (9.07) ** |
| OM b, 26 seg | 23 (88) | 3 (11) | 0 | 24 (92) | 1 (4) | 1 (4) | 0 |
| OM a, 26 seg | 1 (4) | 12 (46) | 13 (50) * | 1 (4) | 15 (58) | 10 (38) * | 25 (12) ** |
b = before HR lowering; a = after HR lowering; seg = coronary segments; # = number of coronary segments; (%) = percentage; CF = color flow; LMC = left main coronary artery, LAD = left anterior descending subdivided into proximal, mid and distal segments; LCx = proximal circumflex; OM = obtuse marginal; * = p < 0.001 versus score before HR lowering; ** = p < 0.001 versus color flow length before HR lowering; color length is expressed as median (IQR).