Myocardial bridging of the left anterior descending coronary artery
A 45 year-old patient underwent 64-slice computed tomography coronary angiography for suspected coronary disease.
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Myocardial bridging of the left anterior descending artery displayed by volume rendering technique during diastole. Due to the intermyocardial course of the middle segment of LAD this particular segment is not imaged.
The curved planar reformatting CT angiography shows minimal stenosis (arrow) of LAD in the intermyocardial segment during late diastole (segment 760 ms). The stenosis increases during systole (segment 404 ms).
The oblique axial section during systole reveals the compressed segment.
Myocardial bridging is the intermyocardial course of a coronary artery. Milking is called the decrease of the diameter of this particular segment during systole. Myocardial bridging usually is found in the left anterior descending artery (LAD). This anatomic variant may alter the technique of coronary surgery or even cause complications.
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