Assessment of Myocardial Bridge and Mural Coronary Artery Using ECG-Gated 256-Slice CT Angiography: A Retrospective Study

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.