Table 2.
Classification of MB according to location, thickness, and length of myocardial bridge segment.
| Location | No. (%) | Mean length (mm)* | Mean thickness (mm)* |
|---|---|---|---|
| LAD2 | 235 (60.4) | 18.1 ± 6.1 | 2.9 ± 0.8 |
| OM | 59 (15.2) | 18.9 ± 4.8 | 2.4 ± 0.4 |
| D1 | 53 (13.6) | 17.1 ± 4.4 | 2.7 ± 0.5 |
| D2 | 14 (3.6) | 10.0 ± 2.8 | 2.1 ± 0.1 |
| LAD1 | 7 (1.8) | 17.0 ± 1.4 | 2.5 ± 0.7 |
| LAD3 | 7 (1.8) | 13.5 ± 2.1 | 2.3 ± 0.4 |
| LCX2 | 7 (1.8) | 12.5 ± 0.7 | 2.2 ± 0.3 |
| RCA2 | 7 (1.8) | 9.0 ± 1.4 | 3.1 ± 0.1 |
|
| |||
| Total | 389 (100) | 17.6 ± 5.7 | 2.7 ± 0.7 |
Data in parentheses are percentages.
*Data are mean ± standard deviation.
LAD1: the proximal segment of left anterior descending artery (LAD); LAD2: the middle segment of LAD; LAD3: the distal segment of LAD; OM: the obtuse marginal branch; D1: the first diagonal artery; D2: the second diagonal artery; LCX2: the distal segment of left circumflex artery; RCA: the middle segment of right coronary artery.